Contents on 1 February '08
- IAU Minor Planet Center
- NEOCP Activity -- seven listings: 3 new, 4 updated
- New MPECs -- three MPECs
- Observers -- thirteen observing facilities
- Impact Risk Monitoring -- six objects
- Chronology
Resources:
- 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
The latest A/CC news is available via framed access, 
RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.
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 1 February '08
The MPC's NEO Confirmation Page has 7 listings: 3 new, 4 updated
When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and four updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of sixteen objects listed on the NEOCP at some point today.
To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.
New MPECs on 1 February '08
Minor Planet Electronic Circulars
As of last check at 2357 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-C01 time-stamped "07:08 UT" - Daily Orbit Update - see below
- MPEC 2008-C02 time-stamped "19:17 UT" - Comet P/2007 VQ11 (Catalina) - see below
- MPEC 2008-C03 time-stamped "22:45 UT" - 2008 BT18
MPEC 2008-C03 - "22:45 UT" - 2008 BT18
- K08B18T 2008 BT18 (Earth MOID=7.9 LD, H=18.2 ~776m) was discovered at 0954 UT on 31 Jan. by LINEAR, which observed it at Jan. 31.41-45p4. The discovery was confirmed by Jim Young via Table Mtn. Obs. (Feb. 1.24-26p4), the Mt. Lemmon Survey (MLS) (Feb. 1.27-29p3), and Great Shefford Obs. (Feb. 1.91-92p3).
MPEC 2008-C02 - "19:17 UT" - Comet P/2007 VQ11 (Catalina)
- PK07V11Q P/2007 VQ11 (q=2.694 AU, Q=8.125 AU, TP=2008 Feb. 13.55683 TT) from the Catalina Sky Survey (CSS) (Nov. 9.37-39p4, Dec. 5.25-27p4 & Feb. 1.10-16p7), LONEOS (Nov. 18.33-38p4), and Table Mtn. Obs. (Feb. 1.19-23p4)
<< DOU on 1 Feb. '08 >> MPEC 2008-C01 - "07:08 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08B15E 2008 BE15 (small asteroid, Q=4.134 AU, arc=1 day, H=24.6 ~41m) from the Spacewatch 1.8m telescope (Jan. 31.32-33p2) and LINEAR (Jan. 31.40-45p5)
- K08B15D 2008 BD15 (arc=2 days, H=20.9 ~224m) from Spacewatch 1.8m (Feb. 1.19p3)
- K08B15C 2008 BC15 (small asteroid, arc=1 day, H=26.6 ~16m) from MLS (Jan. 31.27p4)
- K08A04F 2008 AF4 (arc=21 days, H=19.8 ~371m) from Hamamatsu-Yuto Obs. (Jan. 31.68-73p6)
- Observations of recently (no longer) risk-listed objects
- K08A00E 2008 AE (arc=2 opp, H=19.6 ~407m) from LINEAR (Jan. 31.46-51p5)
- K07Y56V 2007 YV56 (arc=31 days, H=21.0 ~214m) from Spacewatch 1.8m (Jan. 31.25-26p3)
- K07Y02B 2007 YB2 (Q=5.227 AU, arc=44 days, H=18.4 ~708m) from CSS (Jan. 31.49-50p4)
- Observations of small asteroids (H>22.0)
- K07VI4D 2007 VD184 (arc=81 days, H=23.1 ~81m) from Spacewatch 1.8m (Jan. 31.53p2)
- Observations of other objects
- K08B02S 2008 BS2 (arc=14 days, H=18.2 ~776m) from Spacewatch 1.8m (Feb. 1.17-18p3)
- K07Y56O 2007 YO56 (arc=33 days, H=20.2 ~309m) from Spacewatch 1.8m (Feb. 1.16-17p3)
- K07Y00K 2007 YK (arc=2 opp, H=17.6 ~1.02 km) from NEAT's USAF Haleakala telescope (2002 Dec. 14.56-59p3)
- K07Y00H 2007 YH (arc=46 days, H=20.1 ~323m) from Astronomical Research Obs. (ARO) (Jan. 31.06-08p3)
- K07VI4J 2007 VJ184 (arc=80 days, H=21.2 ~195m) from Spacewatch 1.8m (Jan. 31.54-55p2)
- K07Q03E 2007 QE3 (Q=4.045 AU, arc=162 days, H=19.9 ~355m) from Spacewatch 1.8m (Jan. 31.52-53p3 at V=22.2-3)
- K05T45U 2005 TU45 (arc=3 opp, H=17.1 ~1.29 km) from CSS (Jan. 31.18-23p4) and Hamamatsu-Yuto Obs. (Jan. 31.50-57p9)
- K05G21P 2005 GP21 (arc=2 opp, H=19.6 ~407m) from Spacewatch 1.8m (Jan. 31.39-41p3)
- K05C25V 2005 CV25 (arc=2 opp, H=19.5 ~426m) from Spacewatch 1.8m (Jan. 31.44-46p3 at V=22.1)
- K05B02E 2005 BE2 (arc=2 opp, H=18.2 ~776m) from CSS (Jan. 31.33-35p3)
- K05B01T 2005 BT1 (i=63.7°, q=0.381 AU, arc=3 opp, H=19.1 ~513m) from CSS (Jan. 31.19-23p4)
- K04H33K 2004 HK33 (arc=5 opp, H=17.6 ~1.02 km) from MLS (Jan. 31.35-37p4 at V=22.1)
- K03Q29Z 2003 QZ29 (arc=2 opp, H=19.1 ~513m) from Spacewatch 1.8m (Jan. 31.47-48p3)
- K03E16E 2003 EE16 (arc=4 opp, H=19.9 ~355m) from MLS (Jan. 31.44-47p4)
- K02A31V 2002 AV31 (arc=3 opp, H=20.5 ~269m) from CSS (Jan. 31.29-30p4)
- K01S10G 2001 SG10 (arc=3 opp, H=20.4 ~282m) from Spacewatch 1.8m (Jan. 31.47-50p3)
- K00Y29H 2000 YH29 (arc=4 opp, H=17.9 ~891m) from Spacewatch 1.8m (Jan. 31.41-42p3)
- H0891 170891 2004 TY16 from Hamamatsu-Yuto Obs. (Jan. 27.60-62p9 & 31.60-62p6) and CSS (Jan. 31.19-23p3)
- G2825 162825 2001 BO61 from ARO (Jan. 27.08-10p3)
- F4347 154347 2002 XK4 from Hamamatsu-Yuto Obs. (Jan. 27.65-66p3 & 31.64-66p3) and CSS (Jan. 31.24-25p4)
- E4922 144922 2005 CK38 from CSS (Jan. 31.26-28p4) and Naef Obs. (Jan. 31.92-96p3)
- 96189 96189 1991 NT3 from LINEAR (Jan. 31.35-40p4)
- 40267 40267 1999 GJ4 from CSS (Jan. 31.49-51p4)
- 38091 38091 1999 JT3 from CSS (Jan. 31.29-30p4) and Naef Obs. (Jan. 31.93-96p2)
- 03691 3691 Bede (1982 FT) from CSS (Jan. 31.44-45p4)
- 03288 3288 Seleucus (1982 DV) from Goodricke-Pigott Obs. (Jan. 30.23-24p2)
- 01685 1685 Toro (1948 OA) from Thompsonville Obs. (Jan. 31.09-10p6)
Observers on 1 February '08
Thirteen observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2008-C01 -- 2007 YH, 162825 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2008-C01 & 2008-C02 -- 2007 YB2, P/2007 VQ11, 2005 TU45, 2005 BT1, 2005 BE2, 2002 AV31, 40267, 38091, 170891, 154347, 144922, 3691 |
| 683 | Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-C01 -- 3288 |
| J95 | Great Shefford Obs. in England, 1 in MPEC 2008-C03 -- 2008 BT18 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2008-C01 -- 2008 AF4, 2005 TU45, 170891, 154347 |
| 704 | LINEAR in New Mexico, 4 in MPECs 2008-C01 & 2008-C03 -- 2008 BT18, 2008 BE15, 2008 AE, 96189 |
| 699 | LONEOS in Arizona, 1 in MPEC 2008-C02 -- P/2007 VQ11 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2008-C01 & 2008-C03 -- 2008 BT18, 2008 BC15, 2004 HK33, 2003 EE16 |
| 608 | NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2008-C01 -- 2007 YK |
| A13 | Naef Obs. in Switzerland, 2 in MPEC 2008-C01 -- 38091, 144922 |
| 291 | Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2008-C01 -- 2008 BS2, 2008 BE15, 2008 BD15, 2007 YV56, 2007 YO56, 2007 VJ184, 2007 VD184, 2007 QE3, 2005 GP21, 2005 CV25, 2003 QZ29, 2001 SG10, 2000 YH29 |
| 673 | Table Mtn. Obs. in southern California, 1 in MPEC 2008-C02 -- P/2007 VQ11 |
| 6735 | Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-C03 -- 2008 BT18 |
| H53 | Thompsonville Obs. in Illinois, 1 in MPEC 2008-C01 -- 1685 |
Impact Risk Monitoring on 1 February '08
| 0000NNN000 Object | Risk Monitor | When Noted UTC | 0000T0000 Year Range | VI # | 000NN00 Prob Cum | T0000 PS Cum | T0000 PS Max | T S | Notes for Today's Latest Risk Assessments |
| 2008 BO16 | NEODyS | 1523 | 2021-2088 | 46 | 1.62e-07 | -5.11 | -5.98 | 0 | NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/01/30.382 to 2008/01/31.304." |
| 2008 BN16 | NEODyS | 1523 | 2028-2090 | 23 | 2.45e-07 | -6.83 | -7.49 | 0 | NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/01/30.248 to 2008/01/31.346." |
| 2008 BE15 | JPL Sentry | 1522 | 2075-2098 | 3 | 3.0e-08 | -7.18 | -7.39 | 0 | JPL: "Analysis based on 27 observations spanning 1.0674 days (2008-Jan-30.3833 to 2008-Jan-31.45071)." Diameter approximately 0.044 km. from mean, weighted H=24.5. |
| NEODyS | 1523 | R E M O V E D | |||||||
| 2008 BD15 | NEODyS | 1523 | 2025-2090 | 42 | 7.27e-07 | -3.74 | -3.97 | 0 | NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/01/30.314 to 2008/02/01.195." |
| JPL Sentry | 1522 | 2025-2107 | 44 | 6.7e-07 | -3.80 | -4.04 | 0 | JPL: "Analysis based on 18 observations spanning 1.8812 days (2008-Jan-30.31301 to 2008-Feb-01.1942)." Diameter approximately 0.220 km. from mean, weighted H=20.9. | |
| 2008 BC15 | NEODyS | 1523 | 2072 | 1 | 2.44e-07 | -7.22 | -7.22 | 0 | NEODyS: "Based on 25 optical observations (of which 2 are rejected as outliers) from 2008/01/30.313 to 2008/01/31.272." |
| JPL Sentry | 1522 | 2072-2094 | 2 | 1.4e-06 | -6.55 | -6.74 | 0 | JPL: "Analysis based on 24 observations spanning .95917 days (2008-Jan-30.31193 to 2008-Jan-31.2711)." Diameter approximately 0.016 km. from mean, weighted H=26.6. | |
| 2008 AF4 | NEODyS | 1523 | 2078-2090 | 13 | 4.2e-06 | -3.08 | -3.22 | 0 | NEODyS: "Based on 338 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/01/31.730." |
| JPL Sentry | 1522 | 2088-2105 | 25 | 1.7e-05 | -2.51 | -3.14 | 0 | JPL: "Analysis based on 334 observations spanning 21.333 days (2008-Jan-10.39652 to 2008-Jan-31.72966)." Diameter approximately 0.379 km. from mean, weighted H=19.8. | |
Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale
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 1 February '08
Times are UTC for when items were noted or added by The Tracking News.
| 2327 | Grabbed MPEC 2008-C03 - 2008 BT18 - see above |
| 2031 | Grabbed MPEC 2008-C02 - Comet P/2007 VQ11 (Catalina) - see above |
| 1523 | Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has updated its 2008 BC15 risk assessment - see above Noted that NEODyS has posted 2008 BD15 as an impact risk - see above Noted that NEODyS has removed 2008 BE15 as an impact risk - see above Noted that NEODyS has posted 2008 BN16 as an impact risk - see above Noted that NEODyS has posted 2008 BO16 as an impact risk - see above |
| 1522 | Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 BC15 risk assessment - see above Noted that JPL Sentry has updated its 2008 BD15 risk assessment - see above Noted that JPL Sentry has updated its 2008 BE15 risk assessment - see above Grabbed MPEC 2008-C01 - Daily Orbit Update - see above |
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