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* * * * * Near Earth Asteroids * * * * *
In this section we report visual observations of unusual asteroids, that we find of particular interest. The first group consists of NEA's (Near Earth Asteroids), mainly Apollo- and Aten-type objects, and the second group consists of asteroidal objects in cometary orbits. Observed objects since August 2000: * Apollo-type asteroids. 2000 UG11 (138877) = 2000 XG47 2001 YB5 2002 NY40 (22771) = 1999 CU3 69230 Hermes = 1937 UB 2004 JP1 4179 Toutatis 2004 RZ164 3200 Phaethon (100085) = 1992 UY4 2005 JE46 1862 Apollo (23187) = 2000 PN9 2004 XP14 (11405) = 1999 CV3 2006 VV2 2007 TU24 4450 Pan 2009 DO111 * Aten-type asteroids. 2001 CP36 (66391) = 1999 KW4 (33342) = 1998 WT24 2100 Ra-Shalom (66146) = 1998 TU3 2008 EV5 * Amor-type asteroids. 2000 QW7 65803 Didymos = 1996 GT 1999 LF6 (153591) = 2001 SN263 (8567) = 1996 HW1 433 Eros * Asteroids in 'cometary' orbits. 20898 Fountainhills = 2000 WE147 2001 TX16 944 Hidalgo 2005 WY3
Observations:
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site Eros 2009 9 16.838 I 11.9 TA 15.6L 45 BOU Sint Annen Eros 2009 9 11.93 I 11.3 TK 20.3T 77 GON Aralla, León (Nearby field stars checked in DSS. Motion checked over a 120-min period.) Eros 2009 9 11.84 I 11.6 TK 20.3T 77 GON Aralla, León Eros 2009 9 1.055 B 11.8 TA 31.0J 109 BOU Lauwersoog
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2009 DO111 2009 3 19.913 B 12.5 TA 31.0J 89 BOU Lauwersoog (Followed for about 10m. Fast motion instantaneously visible. Object appeared to somewhat fluctuate in brightness.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2008 EV5 2008 12 28.951 I 13.2 TA 31.0J 155 DIJ Burlage 2008 EV5 2008 12 28.950 I 13.7 TA 31.0J 155 BOU Burlage, Germany 2008 EV5 2008 12 26.972 I 13.8 TA 31.0J 109 BOU Lauwersoog 2008 EV5 2008 12 25.908 I 13.4 TA 31.0J 109 BOU Sint Annen (Northward motion evident after about 5 minutes.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1996 HW1 2008 9 3.906 I 12.4 TA 31.0J 89 DIJ Sint Annen 1996 HW1 2008 9 3.905 I 12.5 TA 31.0J 89 BOU Sint Annen
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2005 WY3 2008 3 5.68 I 14.3 AU 40.0L 257 YOS Mt. Hanadate, Ibaraki (Peculiar asteroid that passed perihelion in January. It was much fainter than I had expected because locating in the low sky. So it is uncertain if the object is completely stellar.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site (153591) 2008 2 26.894 I 12.6 TA 31.0J 109 DIJ Groningen (153591) 2008 2 26.891 I 12.5 TA 31.0J 109 BOU Groningen (153591) 2008 2 15.957 I 12.8 TA 31.0J 155 BOU Groningen (Motion evident after 5 minutes. Bright Moon only 23 deg. away. According to IAUC 8921 this Amor-type NEO is a triple system: Arecibo radar delay-Doppler images (2380 MHz, 12.6 cm), obtained on 2008 Feb. 12 and 13, show that minor planet (153591) is a triple system. Based on range extents at 75-m resolution, preliminary estimates of average diameters are 2 km, 1 km, and 400 m for the three components. The orbital separation for the larger two components is at least 10 km.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site Pan 2008 2 11.939 I 12.8 TA 31.0J 72 BOU Sint Annen Pan 2008 2 11.938 I 12.7 TA 31.0J 72 DIJ Sint Annen Pan 2008 2 10.951 B 13.2 TA 31.0J 109 DIJ Sint Annen Pan 2008 2 10.948 I 13.0 TA 31.0J 109 BOU Sint Annen (Motion evident after 5 minutes.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2007 TU24 2008 1 31.056 I 11.9 TA 20.3T 182 GRA Fjellhamar (A further visual observation, this time under favourable conditions. Its motion was apparent within less than a minute. A/2007 TU24 was clearly visible [class 1 observation] and it was estimated as 0.2 mag. fainter than TYC/GSC 3015-0677 and 0.4 mag. brighter than TYC/GSC 3015-0952.) 2007 TU24 2008 1 30.888 B 11.2 TA 31.0J 72 BOU Sint Annen 2007 TU24 2008 1 30.832 I 11.8 TA 20.3T 77 GRA Fjellhamar (This Apollo type object was passing only 0.554 million km from Earth on Jan. 29.36 UT. Quite difficult observation due to clouds, the minor planet was only seen for a number of seconds. It appered a little bit fainter [about 0.3 mag.] than TYC 3451-1221. Its motion was not detected but DSS showed no sufficiently bright objects near the observed location.) 2007 TU24 2008 1 30.777 B 11.1 TA 15.6L 45 BOU Bedum (Easy to see, and brighter than expected. Obvious motion observed over 15-20m period.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2006 VV2 2007 4 1.970 I 10.2 AU 20.3T 100 GRA Fjellhamar (Challenging observation due to full Moon, high clouds and quite low [16 deg.] altitude. Minor planet appeared a little brighter [0.2 mag.] than both SD -09 3129 = TYC 5502-1486 and SD -09 3132 = TYC 5502-0922.) 2006 VV2 2007 4 1.896 I 10.2 AU 12.0R 111 SKI Hønefoss (Minor planet was first seen at 21h05m UT and some 10 minutes later it was passing close to the 7th magnitude star HD 92753. At 21h30m it appeared 0.4 mag. fainter than a 10th magnitude star [BD -07 3903] located 9' W of HD 92753. A/2006 VV2 was also seen by my wife and we found it clearly visible despite full Moon and only moderately dark adapted eyes.) 2006 VV2 2007 4 1.028 I 10.1 TA 20.3T 100 GRA Fjellhamar (Minor planet well visible despite moonlight and some interference from high clouds. The magnitude is deduced from Pogson step estimates of the minor planet and four comparison stars.) 2006 VV2 2007 3 30.967 I 10.3 TA 20.3T 100 GRA Fjellhamar (Observation somewhat affected by Moon, haze and high clouds.) 2006 VV2 2007 3 30.894 I 10.0 TK 31.6L 100 MID Tranby 2006 VV2 2007 3 30.863 I 10.2 TK 31.6L 100 MID Tranby 2006 VV2 2007 3 30.007 I 10.9 TA 20.3T 100 GRA Fjellhamar (Minor planet seen without difficulty but the observation was hampered by moonlight and poor transparency.) 2006 VV2 2007 3 29.938 I 10.9 TK 31.6L 100 MID Tranby 2006 VV2 2007 3 29.003 I 12.0 TA 20.3T 100 GRA Fjellhamar (Asteroid was quite easily seen and located not far from M82 and M81. Brightness estimates: A-6;B=M:C+6 [class ]. Comparison objects: A = TYC 4386-0424 [V = 11.28]; B = TYC 4386-0054 [V = 12.03]; C = GSC 4386-0026 [V = 12.62]; M = Minor planet A/2006 VV2.) 2006 VV2 2007 3 28.913 I 11.6 TA 25.4J 88 DIJ Garmerwolde 2006 VV2 2007 3 28.911 I 11.8 TA 25.4J 88 BOU Garmerwolde 2006 VV2 2007 3 28.887 I 12.3 AC 30.5T 200 COM Roden 2006 VV2 2007 3 28.873 I 11.5 TK 31.6L 100 MID Tranby 2006 VV2 2007 3 28.042 I 12.7 TA 20.3T 182 GRA Fjellhamar (Still rather faint but easier to observe than during previous night. Its movement was notable within less than a minute. Brightness estimates: 0.8 mag. [8 Pogson steps] fainter than TYC 4544-1128 [V = 11.85], 0.2 mag. brighter than GSC 4544-0746 [V = 12.93] and 0.3 mag. brighter than GSC 4544-1406 [V = 12.95].) 2006 VV2 2007 3 27.923 I 12.5 TA 31.0J 109 DIJ Sint Annen 2006 VV2 2007 3 27.922 I 12.4 TA 31.0J 109 BOU Sint Annen (Clear motion observed over 10m period. Strong moonlight, but asteroid well visible.) 2006 VV2 2007 3 27.030 I 13.2 TA 20.3T 182 GRA Fjellhamar (Apollo type minor planet, passing 3.39 million km from Earth on Mar 31.24 UT. The object was faint and near my limiting magnitude, but its motion was clearly detectable after a few minutes. It appeared somewhat fainter [approx. 0.3 mag] than the nearby star GSC 4622-0907 [approx. V = 12.9]. The minor planet was also slightly fainter than GSC 4380-1227 [V = 13.14, ref. HN] in the field of Z Cam.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1999 CV3 2006 8 7.001 I 12.8 AU 25.4J 88 BOU Sint Annen (Clear motion observed over 15m period.) 1999 CV3 2006 8 7.000 I 12.7 AU 25.4J 88 DIJ Sint Annen 1999 CV3 2006 8 5.997 I 12.6 AU 25.4J 88 BOU Sint Annen
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2004 XP14 2006 7 3.969 I 12.5 TA 25.4J 88 DIJ Sint Annen 2004 XP14 2006 7 3.967 B 12.2 TA 25.4J 88 BOU Sint Annen 2004 XP14 2006 7 3.964 B 12.1 TA 36.8L 287 GIL Noordwijk aan Zee (Further estimates: 3.967, 12.6; 3.970, 12.4-12.5.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site (23187) 2006 3 7.161 I 11.9 TA 25.4J 88 BOU Sint Annen (Unusual Apollo-type asteroid in high inclination [51o] orbit. Rapid northward motion in Cassiopeia, low over the northern horizon [!], almost instantaneously visible.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site Apollo 2005 11 8.976 I 13.5 TA 31.0J 109 BOU Sint Annen Apollo 2005 11 8.975 I 13.7 TA 31.0J 109 DIJ Sint Annen
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2005 JE46 2005 11 8.961 I 13.1 TA 31.0J 109 DIJ Sint Annen 2005 JE46 2005 11 8.958 I 13.3 TA 31.0J 109 BOU Sint Annen
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1992 UY4 2005 8 5.976 I 12.2 AU 31.0J 89 BOU Sint Annen 1992 UY4 2005 8 3.017 I 12.0: AU 31.0J 89 DIJ Sint Annen (Some interference from fog.) 1992 UY4 2005 8 3.015 I 12.2 AU 31.0J 89 BOU Sint Annen (Object identified by its motion. Sky becoming grey because of increasing fog.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site Phaethon 2007 12 9.80 I 14.2 TA 40.0L 257 YOS Kita-karuizawa, Gunma Phaethon 2007 12 8.85 I 13.4 TA 40.0L 257 YOS Kita-karuizawa, Gunma (Very interesting! It moves very fast. I could see the motion clearly in real time. Like an artificial satellite. The object is bright, so enjoyable.) Phaethon 2007 12 5.07 I 12.6 TK 20.3T 100 GON Alto del Castro - Aralla, León (Motion checked during a 30-min period. Mountain location, very clear sky.) Phaethon 2004 12 11.57 I 14.4 UO 40.0L 144 YOS Kita-karuizawa, Gunma (Maybe brighter than the ephemeris.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2004 RZ164 2004 12 13.060 I 13.3 HN 20.3T 287 GRA Fjellhamar (Magnitude deduced from Henden V-magnitudes of reference stars in the GK Per field. Asteroid only faintly seen due to a quite bright sky background. Its motion was seen after a couple of minutes. It was subsequently imaged with the same telescope and a ST7 CCD with V-filter.) 2004 RZ164 2004 12 8.760 I 11.8 AU 31.0J 72 DIJ Sint Annen 2004 RZ164 2004 12 8.758 I 11.9 AU 31.0J 72 BOU Sint Annen (Rather bright, very fast moving object. Motion apparent almost instantaneously.) 2004 RZ164 2004 12 7.985 I 12.1 TA 20.3T 100 GRA Fjellhamar (Magnitude derived from TASS Mark IV V-magnitudes of nearby reference stars. Motion detected within a few seconds. Asteroid located within 10" of the topocentric ephemeris position.
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site Hidalgo 2004 12 11.53 I 14.2 HS 40.0L 144 YOS Gunma, Japan (Getting faint.) Hidalgo 2004 11 14.792 I 13.4 HS 31.0J 109 BOU Sint Annen Hidalgo 2004 11 9.48 I 13.2 HS 40.0L 144 YOS Gunma, Japan Hidalgo 2004 11 8.985 I 13.5 HS 25.4J 115 BOU Sint Annen Hidalgo 2004 11 4.853 I 13.3 HS 25.4J 115 BOU Sint Annen Hidalgo 2004 10 15.54 I 13.2 HS 40.0L 144 YOS Gunma, Japan
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1999 LF6 2004 10 18.919 I 14.0 HS 31.0J 109 DIJ Sint Annen 1999 LF6 2004 10 18.917 I 14.0 HS 31.0J 109 BOU Sint Annen (Rapid motion evident over a 10m observing period.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site Toutatis 2004 9 19.869 B 10.8 TK 25.4J 58 DIJ Sint Annen Toutatis 2004 9 19.867 B 10.9 TK 25.4J 58 BOU Sint Annen Toutatis 2004 9 15.901 I 11.6 AU 20.3T 100 GRA Fjellhamar (Observation somewhat challenging due to low altitude and local obstructions [trees]. Magnitude deduced from step estimates and ASAS-3 V-magnitudes of nearby reference stars. Motion not seen during 5-10 minutes but the minor planet appeared at the correct location according to Guide 8.0.) Toutatis 2004 9 8.922 I 12.7 AU 31.0J 109 BOU Sint Annen Toutatis 2004 9 8.921 I 12.6 AU 31.0J 109 DIJ Sint Annen
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2004 JP1 2004 5 16.939 I 14.2: AU 31.0J 143 DIJ Sint Annen 2004 JP1 2004 5 16.932 I 14.5: AU 31.0J 143 BOU Sint Annen (Very faint, fast moving object. Motion apparent within seconds.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1996 GT 2003 11 28.899 I 13.1 HS 31.0J 109 DIJ Sint Annen 1996 GT 2003 11 28.896 I 13.1 HS 31.0J 109 BOU Sint Annen (Easy object. Motion obvious after about 15 minutes.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site Hermes 2003 10 27.885 I 13.3 HN 31.0J 109 DIJ Sint Annen Hermes 2003 10 27.884 I 13.3 HN 31.0J 109 BOU Sint Annen (Rapid motion near 12th magnitude field stars very obvious. Around Oct. 27.95 Hermes was seen passing less than 1' north of (114) Kassandra.) Hermes 2003 10 26.954 I 13.7 HS 31.0J 143 BOU Sint Annen (Well visible, and easy to find close to 15 Ceti.) Hermes 2003 10 25.958 I 13.9 AU 20.3T 200 GRA Fjellhamar (Minor planet was faint, but definitely seen with this instrument. Motion was apparent after a couple of minutes. Magnitude of asteroid was derived from Pogson step estimates and ASAS-3 V-magnitudes of nearby comparison stars.) Hermes 2003 10 18.975 14.7 HS 40.7L 116 BIV Les Sièges Hermes 2003 10 18.931 14.6 HS 40.7L 116 BIV Les Sièges Hermes 2003 10 18.906 I 14.4 HS 31.0J 177 DIJ Lauwersoog Hermes 2003 10 18.901 I 14.3 HS 31.0J 177 BOU Lauwersoog
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1999 CU3 2003 9 24.853 I 14.0 HS 31.0J 143 DIJ Lauwersoog 1999 CU3 2003 9 24.851 I 13.8 HS 31.0J 143 BOU Lauwersoog 1999 CU3 2003 9 23.850 I 13.9: HS 25.4J 143 DIJ Noorddijk 1999 CU3 2003 9 23.847 I 13.9 HS 25.4J 143 BOU Noorddijk (Interesting Appollo object at high declination [+75o] in Cepheus. Rapid motion obvious within 5 minutes.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1998 TU3 2003 9 4.099 I 13.9 SK 31.0J 109 BOU Sint Annen (Easy object. No unambigous motion detected because of position in rather empty field, but DSS shows nothing brighter than magn. ~16 near observed position.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site Ra-Shalom 2003 9 1.893 I 13.9 GA 31.0J 143 DIJ Noorddijk Ra-Shalom 2003 9 1.888 I 14.1 GA 31.0J 143 BOU Noorddijk (Asteroid identified by its obvious motion over ~30 minutes period through rather dense Milky Way field near tau Aquilae.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2002 NY40 2002 8 18.128 B 9.6 TK 25.6L 42 BIV Ablis 2002 NY40 2002 8 18.123 B 9.7 TK 25.6L 42 BIV Ablis 2002 NY40 2002 8 18.095 B 10.0 TK 25.4L 76 GRA Hågår Obs., Eina (Motion was instantly apparent. An appulse to a mag. VT=10.03 star [equal to that of asteroid] was seen on 02h16m47s UT. The asteroid was followed until I lost it from view in strong twilight on 02h45m UT. It was also imaged with CCD and V-filter.) 2002 NY40 2002 8 18.063 B 10.2 TK 25.6L 42 BIV Ablis 2002 NY40 2002 8 18.059 B 10.3 TK 25.4L 76 GRA Hågår Obs., Eina 2002 NY40 2002 8 18.045 I 10.0 TK 12.0R 40 SKI Hønefoss (This minor planet was observed on Aug. 17-18 during 2205-2345 and 0040-0120 UT. Its movement was detected almost immediately. It was seen at same magnitude on Aug. 18.049.) 2002 NY40 2002 8 18.026 B 9.0: TJ 15.0L 48 GUZ Krosno 2002 NY40 2002 8 18.024 B 9.5 TK 31.0J 72 DIJ Sint Annen 2002 NY40 2002 8 18.023 B 9.7 TK 31.0J 72 BOU Sint Annen (Impressive view, seeing this object move rapidly through a dense stellar field in Vulpecula.) 2002 NY40 2002 8 18.023 B 10.1 TK 25.6L 42 BIV Ablis 2002 NY40 2002 8 18.018 B 10.0 TK 25.6L 42 BIV Ablis 2002 NY40 2002 8 18.012 B 9.7 TK 25.6L 42 BIV Ablis 2002 NY40 2002 8 17.952 I 9.2 TJ 15.0L 100 GUZ Krosno (Very fast motion, evident in a split second. Quite bright object, passing about 10' away from ephemeris position. At limit of visibility in 10x50B.) 2002 NY40 2002 8 17.920 I 10.0 TK 30.5T 56 COM Roden 2002 NY40 2002 8 17.862 B 10.0 TK 25.4L 76 GRA Hågår Obs., Eina 2002 NY40 2002 8 17.076 B 11.0 TK 25.6L 84 BIV Ablis 2002 NY40 2002 8 17.072 B 10.9 TK 25.6L 84 BIV Ablis 2002 NY40 2002 8 17.068 B 11.0 TK 25.6L 84 BIV Ablis 2002 NY40 2002 8 17.056 B 11.0 TK 25.4J 58 BOU Sint Annen 2002 NY40 2002 8 17.049 B 11.1 TK 15.2L 88 GRA Fjellhamar (Motion noted after a couple of minutes. Magnitude deduced from Tycho-2 VT-magnitudes of nearby field stars.) 2002 NY40 2002 8 17.025 B 11.3 TK 15.2L 88 GRA Fjellhamar 2002 NY40 2002 8 17.006 B 11.2 TK 15.2L 88 GRA Fjellhamar 2002 NY40 2002 8 16.988 B 11.4 TK 15.2L 88 GRA Fjellhamar 2002 NY40 2002 8 16.974 B 11.4 TK 15.2L 88 GRA Fjellhamar 2002 NY40 2002 8 16.962 I 10.9 TK 12.0R 40 SKI Hønefoss (Seen from 21h52m UT to 23h15m UT. Its movement was apparent within a few minutes. Deduced magnitude somewhat uncertain due to discordant magnitudes of comparison stars. Its telescopic visibility was similar to that of a mag. 4.8-5.0 star with naked eye.) 2002 NY40 2002 8 16.960 B 11.4 TK 15.2L 88 GRA Fjellhamar 2002 NY40 2002 8 16.073 I 12.5 TK 25.4J 88 BOU Sint Annen 2002 NY40 2002 8 16.027 I 12.7 AC 15.2L 150 GRA Fjellhamar (Sequence AAVSO RU Peg chart with V-magnitudes by Henden. Magnitude corrected -0.2 mag. for extinction.) 2002 NY40 2002 8 15.014 I 13.3 AC 15.2L 150 GRA Fjellhamar (Apollo type minor planet, passing 527,000 km from Earth on Aug. 18.33 UT. Faint with this instrument, but it was positively identified from a field scetch and its motion after about 15 minutes. Magnitude derived from AAVSO RU Peg chart with CCD-V measurements by A. Henden, USNO. Derived mag. corrected -0.2 mag. for extinction.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2001 YB5 2002 1 6.14 I 13.9 AC 25.4L 218 GRA Hågår Obs., Eina (Not easy to locate due to its faintness and lack of detailed finding charts. When found, its motion was apparent within a minute or so. Magnitude estimate: 138-2;145+5 (class 2, reference AAVSO U Gem). Derived magnitude corrected -0.1 mag. for extinction. This object was subsequently CCD imaged with the same telescope.) 2001 YB5 2002 1 4.932 I 14.8 HS 31.0J 143 DIJ Sint Annen 2001 YB5 2002 1 4.926 I 14.7 HS 31.0J 143 BOU Sint Annen (Small Apollo-type asteroid, passing some 800.000 km from Earth on January 7. Motion evident after a few minutes, but not yet moving that fast.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2001 TX16 2002 2 2.824 I 13.8 HS 31.0J 143 DIJ Lauwersoog 2001 TX16 2002 2 2.821 I 13.9 HS 31.0J 143 BOU Lauwersoog (Still of stellar appearance.) 2001 TX16 2002 1 4.910 I 14.3 HS 31.0J 143 DIJ Sint Annen 2001 TX16 2002 1 4.904 I 14.1 HS 31.0J 143 BOU Sint Annen (Asteroid with 'cometary' orbit close to perihelion on January 18. [q = 1.446 AU, P = 6.8 years]. Definitely of stellar appearance.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1998 WT24 2001 12 18.063 I 11.2: TJ 20.3T 123 GRA Fjellhamar 1998 WT24 2001 12 17.868 B 11.2 TJ 30.5L 70 GIL Noordwijk aan Zee 1998 WT24 2001 12 17.830 B 11.0 TJ 15.6L 72 BOU Groningen 1998 WT24 2001 12 16.750 I 10.1 TJ 7.0R 24 GRA Hågår Obs., Eina 1998 WT24 2001 12 16.747 B 10.2 TT 31.0J 72 DIJ Lauwersoog 1998 WT24 2001 12 16.744 B 10.1 TJ 31.0J 72 BOU Lauwersoog (Moving very fast only 3/4 degree south of M34.) 1998 WT24 2001 12 15.927 B 9.6 TJ 15.6L 45 BOU Groningen (Fast motion very obvious!) 1998 WT24 2001 12 15.902 B 9.7 TJ 7.0R 24 GRA Fjellhamar 1998 WT24 2001 12 13.982 B 10.0 TJ 31.0J 72 BOU Sint Annen 1998 WT24 2001 12 13.980 I 9.7 TJ 31.0J 72 DIJ Sint Annen 1998 WT24 2001 12 13.116 B 11.1 VB 20.3T 100 GRA Fjellhamar 1998 WT24 2001 12 12.099 B 11.7 VB 20.3T 100 GRA Fjellhamar 1998 WT24 2001 12 11.139 B 12.2 VB 20.3T 100 GRA Fjellhamar (Motion apparent within a few minutes. Observation [Pogson step estimates]: K-3; L+1 [class 2]. Chart: BAA.VSS U Gem [comparison stars K=11.90, L=12.29]. Both minor planet and comparison stars were slightly defocused, hence the 'Bobrovnikoff' estimation method. No corrections were applied for extinction, although the U Gem field was located 10 degrees higher in sky than the asteroid.) 1998 WT24 2001 12 10.007 I 11.7 HS 25.4J 88 DIJ Sint Annen 1998 WT24 2001 12 10.006 I 11.9 HS 25.4J 88 BOU Sint Annen (Another bright Aten object, with a short period of only 222 days.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 1999 KW4 2001 5 26.000 I 10.9 TJ 31.0J 72 BOU Sint Annen 1999 KW4 2001 5 25.958 I 11.0 TJ 31.0J 72 DIJ Sint Annen 1999 KW4 2001 5 25.956 I 10.9 TJ 31.0J 72 BOU Sint Annen (Very rapid motion! Object is seen moving against stellar background instantaneously.) 1999 KW4 2001 5 25.003 I 11.5 HS 31.0J 109 BOU Sint Annen (Aten with shortest period of only 188 days! Very rapid motion obvious within seconds. Apparently this is another double asteroid, according to the following information from IAUC 7632: Goldstone (8560-MHz, 3.5-cm) delay-Doppler radar images on May 21-23 reveal that 1999 KW4 is a binary system. The images show separations up to at least 2 km between the components, whose sizes differ by a factor of at least three.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2000 XG47 2001 4 21.944 I 13.9 HS 31.0J 143 DIJ Sint Annen 2000 XG47 2001 4 21.938 I 14.0 HS 31.0J 143 BOU Sint Annen
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2001 CP36 2001 2 20.006 I 14.2 HS 31.0J 143 DIJ Sint Annen 2001 CP36 2001 2 20.004 I 14.2 HS 31.0J 143 BOU Sint Annen (Very rapid motion, evident within minutes. Very small Aten-object [H=23], discovered by LINEAR on February 15, with period of only 220 days!)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2000 WE147 2009 12 12.14 I 15.2 HN 20.3T 206 GON Alto del Castro, León (Mountain location, very clear sky. Nearby field stars checked in DSS. Comparison stars taken from Henden photometry near AK Cnc. Motion checked over a 20-min period.) 2000 WE147 2000 12 22.940 I 14.9 HS 31.0J 177 DIJ Sint Annen 2000 WE147 2000 12 22.935 I 14.9 HS 31.0J 177 BOU Sint Annen (Not a NEA, but a very unusual asteroid, which with perihelion in early August 2001 at 2.26 AU, P = 8.7 years and i = 45 deg, may turn out to be a periodic comet after all.) N.B. Recently this object has received the permanent designation (20898) Fountainhills. It is considered to be a member of the Hilda group of asteroids.
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2000 UG11 2000 11 3.934 I 14.5: HS 31.0J 186 BOU/DIJ Sint Annen (Object followed for ~30 minutes. Very rapid motion! It appears that this is a 'double asteroid'. The following information was extracted from IAUC 7518: Arecibo radar delay-Doppler images [2380 MHz, 12.6 cm] obtained on Nov. 3-7 show that 2000 UG11 is a binary system. Preliminary estimates of average diameters, based on range extents at 15-m resolution, are 230 and 100 m. Goldstone radar observations [8560 MHz, 3.5 cm] on Nov. 6 confirm the binary nature of this minor planet. Using the combined data sets, we derive an orbital period of 19 +/- 1.5 hr.)
Object Year Mn Day MM Mag Ref Scope Pwr Obs Site 2000 QW7 2000 08 29.956 I 13.2: HS 31.0J 124 BOU/DIJ Sint Annen (Rapid motion very evident. Brightness estimate difficult because of nearby pi Aqr.) 2000 QW7 2000 08 29.888 I 13.3 HS 31.0J 124 BOU/DIJ Sint Annen