Contents on 26 February '08
- IAU Minor Planet Center
- Impact Risk Monitoring -- three objects
- Consolidated Risk Tables - the CRT page
- Earth's Busy Neighborhood Traffic Report
- Ephemerides for risk-rated and nearby objects
- Old & new CRT Archive
- Old News Archive & Small Objects Archive
Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.
NEOCP Activity on 26 February '08
The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated
When last checked at 2303 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, four were "one nighters."
New MPECs on 26 February '08
Minor Planet Electronic Circulars
There were four MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-D36 time-stamped "07:07 UT" - Daily Orbit Update - see below
- MPEC 2008-D37 time-stamped "19:14 UT" - 2007 XA51 - see below
- MPEC 2008-D38 time-stamped "20:53 UT" - 2007 UK126 - see below
- MPEC 2008-D39 time-stamped "23:56 UT" - 2007 TG422, 2007 TH422, 2007 TJ422, 2007 UL126, 2007 VH305
MPEC 2008-D39 - "23:56 UT" - 2007 TG422, 2007 TH422, 2007 TJ422, 2007 UL126, 2007 VH305
- K07VU5H 2007 VH305 (Centaur, q=8.189 AU, Q=40.364 AU, H=11.5 ~17.0 km) was discovered at 0548 UT on 4 Nov. 2007 by Apache Point Obs., which observed it at 2007 Sept. 4.32p2 at V=23.0, 2007 Sept. 15.29-30p2 at V=22.4, 2007 Sept. 19.34-35p2 at V=22.6, 2007 Sept. 22.32p2, 2007 Oct. 8.34p2, 2007 Oct. 12.34p2 at V=22.4, 2007 Oct. 14.34p2 at V=22.7, 2007 Oct. 19.33-34p2 at V=22.3, 2007 Oct. 20.32p2 at V=22.8, Nov. 4.24-25p2 at V=22.5, 8.24-25p2 at V=22.3, 12.24p2 at V=22.9, 17.24-25p2 at V=22.5, and 19.22p2 at V=22.3. The discovery was confirmed by the Mt. Lemmon Survey (MLS) (2007 Sept. 15.33-35p4).
- K07UC6L 2007 UL126 (Centaur, q=8.605 AU, Q=16.766 AU, H=9.9 ~35.5 km) was discovered at 0216 UT on 30 Oct. 2007 by the Apache Point, which observed it at 2007 Oct. 30.09-10p2, Nov. 2.09p2, 5.09-10p2, 8.09-10p2, 9.09p2, 14.09p2, 18.10p2, and 20.09p2.
- K07Tg2J 2007 TJ422 (Centaur, q=9.259 AU, Q=29.925 AU, H=11.0 ~21.4 km) was discovered at 0707 UT on 6 Oct. 2007 by the Apache Point, which observed it at 2007 Sept. 5.30-31p2 at V=22.3-23.2, 2007 Sept. 14.26p2 at V=22.4-23.5, 2007 Oct. 6.30p2 at V=22.3-9, 2007 Oct. 12.30-31p2 at V=22.5-23.6, 2007 Oct. 15.30p2 at V=22.3-23.0, 2007 Oct. 20.29p2 at V=22.6-23.7, Nov. 4.21p2 at V=22.7-23.6, and 7.17p2 at V=23.2-24.7.
- K07Tg2H 2007 TH422 (KBO, q=28.331 AU, Q=50.870 AU, H=7.8 ~93.3 km) was discovered at 1134 UT on 3 Oct. 2007 by the Apache Point, which observed it at 2007 Oct. 3.48p2 at V=23.2-24.7, 2007 Oct. 9.47p2 at V=22.5-23.5, 2007 Oct. 12.48-49p2 at V=22.6-23.6, 2007 Oct. 19.48p2 at V=22.6-23.7, 2007 Oct. 20.49p2 at V=22.8-24.2, Nov. 2.39p2 at V=22.5-23.7, 5.39-40p2 at V=22.5-23.4, 11.40p2 at V=22.6-23.7, 14.39p2 at V=22.5-23.5, 18.39p2 at V=22.5-23.1, and 20.33p2 at V=22.9-24.3.
- K07Tg2G 2007 TG422 (q=35.561 AU, Q=927.509 AU, H=6.1 ~204 km) was discovered at 1050 UT on 3 Oct. 2007 by the Apache Point, which observed it at 2007 Sept. 5.45p2 at V=22.7-24.1, 2007 Sept. 15.40-41p2 at V=22.1-9, 2007 Sept. 22.44p2 at V=22.3-23.0, 2007 Oct. 3.45-46p2 at V=22.2-23.0, 2007 Oct. 9.44p2 at V=22.2-23.1, 2007 Oct. 12.45-46p2, 2007 Oct. 14.45-46p2 at V=22.2, Nov. 2.36p2 at V=22.2-23.1, 5.36-37p2 at V=22.2-23.1, 8.38-39p2 at V=22.3-9, 12.36p2 at V=22.1-23.2, 17.36p2 at V=22.5, and 19.34p2 at V=22.2-23.0.
MPEC 2008-D38 - "20:53 UT" - 2007 UK126
- K07UC6K 2007 UK126 (q=37.970 AU, Q=104.664 AU, H=4.0 ~537 km) was discovered at 0905 UT on 19 Oct. 2007 by Mt. Palomar, which observed it at 2006 Dec. 5.35-37p2, 2006 Dec. 12.27-31p3, 2007 Oct. 19.38p1, 2007 Oct. 19.42p1, 2007 Oct. 20.37p1, 2007 Oct. 20.42p1, Nov. 13.24p1, 13.29p1, 13.35p1, 14.21p1, Dec. 3.15p1, 3.21p1, 3.26p1, 3.32p1, Jan. 14.13p1, and 15.09p1.
MPEC 2008-D37 - "19:14 UT" - 2007 XA51
- K07X51A 2007 XA51 (small asteroid, H=23.3 ~74m) was discovered at 0625 UT on 15 Dec. 2007 by the MLS, which observed it at Dec. 15.27-29p4, 16.27-31p8, and 17.37-38p3.
- Observations of risk-listed objects
- K08D00B 2008 DB (small asteroid, arc=8 days, H=25.6 ~26m) from the Spacewatch 1.8m telescope (Feb. 26.20-21p3)
- Observations of recently (no longer) risk-listed objects
- K08CB9G 2008 CG119 (i=41.3°, arc=12 days, H=19.0 ~537m) from the Siding Spring Survey (SSS) (Feb. 25.48p2)
- K08CB8R 2008 CR118 (arc=16 days, H=18.7 ~616m) from Naef Obs. (Feb. 25.87-91p3)
- K08C21Z 2008 CZ21 (arc=16 days, H=20.3 ~295m) from Astronomical Research Obs. (ARO) (Feb. 24.17p3)
- Observations of small asteroids (H>22.0)
- K07Y56M 2007 YM56 (arc=56 days, H=22.3 ~117m) from ARO (Feb. 24.05-07p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08C06C 2008 CC6 (q=0.285 AU, arc=17 days, H=22.0 ~135m) from Balzaretto Obs. (Feb. 23.83-85p2)
- K08C01H 2008 CH1 (arc=24 days, H=21.8 ~148m) from Spacewatch 1.8m (Feb. 26.19p3)
- Observations of other objects
- K08CB9J 2008 CJ119 (arc=54 days, H=21.7 ~155m) from ARO (Feb. 24.15-16p3)
- K08CB6R 2008 CR116 (arc=15 days, H=20.6 ~257m) from KLENOT (Feb. 25.93p6)
- K08CB6J 2008 CJ116 (arc=16 days, H=19.4 ~446m) from Spacewatch 1.8m (Feb. 26.23-24p2)
- K08C70N 2008 CN70 (arc=16 days, H=19.2 ~490m) from SSS (Feb. 25.42-43p2)
- K08C01N 2008 CN1 (arc=23 days, H=20.7 ~245m) from Greiner Research Obs. (Feb. 24.12-13p40), LINEAR (Feb. 25.34-38p5), Hamamatsu-Yuto Obs. (Feb. 25.49-52p3), Eschenberg Obs. (Feb. 25.79p4), and KLENOT (Feb. 25.90p8)
- K07Y56O 2007 YO56 (arc=56 days, H=20.2 ~309m) from ARO (Feb. 24.08-10p3)
- K07Y01F 2007 YF1 (Q=4.001 AU, arc=70 days, H=18.6 ~645m) from ARO (Feb. 24.11-12p3)
- K07L00S 2007 LS (Q=4.532 AU, arc=2 opp, H=17.8 ~933m) from Spacewatch 1.8m (Feb. 26.13-14p3)
- K06Y13F 2006 YF13 (arc=2 opp, H=20.0 ~339m) from KLENOT (Feb. 25.84-85p4)
- K05E70K 2005 EK70 (arc=4 opp, H=17.4 ~1.12 km) from Hamamatsu-Yuto Obs. (Feb. 25.44-48p8)
- K03R10M 2003 RM10 (arc=3 opp, H=20.3 ~295m) from Spacewatch 1.8m (Feb. 10.39-43p3)
- K03A03A 2003 AA3 (arc=3 opp, H=20.2 ~309m) from Spacewatch 1.8m (Feb. 26.10-11p3)
- K02T66D 2002 TD66 (arc=4 opp, H=20.3 ~295m) from Eschenberg Obs. (Feb. 25.76p4)
- K02J00C 2002 JC (i=40.9°, arc=6 opp, H=17.1 ~1.29 km) from the SZTE Asteroid Program (SZTE) (Feb. 26.15-16p4)
- K01QE2H 2001 QH142 (arc=4 opp, H=18.3 ~741m) from ARO (Feb. 24.07-09p3)
- K00E70R 2000 ER70 (i=36.9°, arc=4 opp, H=16.9 ~1.41 km) from SZTE (Feb. 26.13-14p3)
- K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from Naef Obs. (Feb. 25.88-90p2)
- J99A10Q 1999 AQ10 (arc=3 opp, H=20.3 ~295m) from ARO (Feb. 24.04-05p2)
- H3561 173561 2000 YV137 from MLS (Feb. 25.15-17p4)
- H0891 170891 2004 TY16 from Sant Cugat del Valles Obs. (Feb. 22.88-91p2 & 23.89-92p2) and Corner Obs. (Feb. 24.86-91p4)
- F3591 153591 2001 SN263 from Hamamatsu-Yuto Obs. (Feb. 19.39-44p26 & 19.59-60p16)
- 89830 89830 2002 CE from LINEAR (Feb. 25.36-41p5)
- 66407 66407 1999 LQ28 from LINEAR (Feb. 25.30-32p3)
- 11398 11398 1998 YP11 from Sant Cugat del Valles Obs. (Feb. 22.94p1)
- 03288 3288 Seleucus (1982 DV) from Airali Obs. (Feb. 22.90-91p3 & 23.90-91p4)
- 01620 1620 Geographos (1951 RA) from Sant Cugat del Valles Obs. (Feb. 22.89p1, 22.93p1 & 23.90-94p2)
Observers on 26 February '08
Seventeen observing facilities appeared in this day's MPECs.
|Code||Observer / observatory|
|169||Airali Obs., 1 in MPEC 2008-D36 -- 3288|
|705||Apache Point Obs. in New Mexico, 5 in MPEC 2008-D39 -- 2007 VH305, 2007 UL126, 2007 TJ422, 2007 TH422, 2007 TG422|
|H55||Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2008-D36 -- 2008 CZ21, 2008 CJ119, 2007 YO56, 2007 YM56, 2007 YF1, 2001 QH142, 1999 AQ10|
|A81||Balzaretto Obs. in Italy, 1 in MPEC 2008-D36 -- 2008 CC6|
|B50||Corner Obs. in Germany, 1 in MPEC 2008-D36 -- 170891|
|151||Eschenberg Obs. in Switzerland, 2 in MPEC 2008-D36 -- 2008 CN1, 2002 TD66|
|H51||Greiner Research Obs. in Wisconsin, 1 in MPEC 2008-D36 -- 2008 CN1|
|379||Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-D36 -- 2008 CN1, 2005 EK70, 153591|
|246||KLENOT in the Czech Republic, 3 in MPEC 2008-D36 -- 2008 CR116, 2008 CN1, 2006 YF13|
|704||LINEAR in New Mexico, 3 in MPEC 2008-D36 -- 2008 CN1, 89830, 66407|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-D36, 2008-D37 & 2008-D39 -- 2007 XA51, 2007 VH305, 173561|
|675||Mt. Palomar in southern California, 1 in MPEC 2008-D38 -- 2007 UK126|
|A13||Naef Obs. in Switzerland, 2 in MPEC 2008-D36 -- 2008 CR118, 2000 DP107|
|461||SZTE Asteroid Program (SZTE) in Hungary, 2 in MPEC 2008-D36 -- 2002 JC, 2000 ER70|
|B61||Sant Cugat del Valles Obs., 3 in MPEC 2008-D36 -- 170891, 11398, 1620|
|E12||Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-D36 -- 2008 CN70, 2008 CG119|
|291||Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2008-D36 -- 2008 DB, 2008 CJ116, 2008 CH1, 2007 LS, 2003 RM10, 2003 AA3|
Impact Risk Monitoring on 26 February '08
Notes for Today's Latest Risk Assessments
|2008 DJ||NEODyS||1618||2022-2058||4||9.07e-09||-5.05||-5.09||0||NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/02/25.338 to 2008/02/25.963."|
|JPL Sentry||0257||2011-2106||77||3.4e-07||-3.65||-4.32||0||JPL: "Analysis based on 18 observations spanning .62523 days (2008-Feb-25.33729 to 2008-Feb-25.96252)." Diameter approximately 0.323 km. from mean, weighted H=20.1.|
|2008 DB||JPL Sentry||1618||2046-2096||20||3.7e-05||-4.82||-4.89||0||JPL: "Analysis based on 46 observations spanning 7.9662 days (2008-Feb-18.242 to 2008-Feb-26.20822)." Diameter approximately 0.025 km. from mean, weighted H=25.6.|
|NEODyS||1618||2046-2089||28||2.27e-05||-5.04||-5.12||0||NEODyS: "Based on 47 optical observations (of which 2 are rejected as outliers) from 2008/02/18.243 to 2008/02/26.209."|
|2008 AO112||NEODyS||1858||2025||1||1.63e-09||-6.21||-6.21||0||NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2008/01/11.090 to 2008/01/12.099."|
An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.
Chronology on 26 February '08
Times are UTC for when items were noted or added by The Tracking News.
|0032 2/27||Grabbed MPEC 2008-D39 - 2007 TG422, 2007 TH422, 2007 TJ422, 2007 UL126, 2007 VH305 - see above|
|2057||Grabbed MPEC 2008-D38 - 2007 UK126 - see above|
|1958||Grabbed MPEC 2008-D37 - 2007 XA51 - see above|
|1858||Noted that NEODyS has posted 2008 AO112 as an impact risk - see above|
|1619||Grabbed MPEC 2008-D36 - Daily Orbit Update - see above|
|1618||Noted that JPL Sentry has updated its 2008 DB risk assessment - see above|
Noted that NEODyS has updated its 2008 DB risk assessment - see above
Noted that NEODyS has posted 2008 DJ as an impact risk - see above
|0257||Noted that JPL Sentry has posted 2008 DJ as an impact risk - see above|