Contents on 18 January '08
- IAU Minor Planet Center
- NEOCP Activity -- nine listings: 1 new, 8 updated
- New MPECs -- three MPECs
- Observers -- eight observing facilities
- Impact Risk Monitoring -- four 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 this year 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 18 January '08
The MPC's NEO Confirmation Page has 9 listings: 1 new, 8 updated
When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and eight updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of thirteen 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 18 January '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-B14 time-stamped "07:09 UT" - Daily Orbit Update - see below
- MPEC 2008-B15 time-stamped "13:05 UT" - 2008 BE - see below
- MPEC 2008-B16 time-stamped "19:44 UT" - Comet C/2007 VO53 (Spacewatch)
MPEC 2008-B16 - "19:44 UT" - Comet C/2007 VO53 (Spacewatch)
- CK07V53O C/2007 VO53 (i=87.0°, q=4.845 AU, Q=9655.520 AU, TP=2010 Apr. 26.82747 TT) from the Mt. Lemmon Survey (MLS) (2007 Oct. 20.38-40p4, Jan. 11.17-24p16, 12.23-25p4, 13.09-10p4, 14.08-09p4 & 15.11-13p4), the Spacewatch 0.9m telescope (Nov. 9.21-25p3), the Spacewatch 1.8m telescope (Nov. 19.38-39p3, Jan. 12.20-24p3, 13.19-21p3 & 15.08-10p2), Junk Bond Obs. (Jan. 12.21-28p4, 13.14p1 & 13.19-21p2), and Astronomical Research Obs. (ARO) (Jan. 15.09-11p3 & 16.03-05p3)
MPEC 2008-B15 - "13:05 UT" - 2008 BE
- K08B00E 2008 BE (small asteroid, H=22.8 ~93m) was discovered at 0933 UT on 17 Jan. by the MLS, which observed it at Jan. 17.40-41p4, 17.48p4, and 18.40-41p4. The discovery was confirmed by Spacewatch 1.8m (Jan. 18.27-28p3).
<< DOU on 18 Jan. '08 >> MPEC 2008-B14 - "07:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08A33N 2008 AN33 (arc=2 days, H=18.9 ~562m) from Spacewatch 1.8m (Jan. 17.43-44p3)
- K08A33L 2008 AL33 (small asteroid, arc=3 days, H=22.8 ~93m) from Spacewatch 1.8m (Jan. 17.39-40p3 & 18.20-21p3)
- K08A28S 2008 AS28 (Q=4.310 AU, arc=6 days, H=19.4 ~446m) from ARO (Jan. 16.06-08p3)
- K08A04F 2008 AF4 (arc=7 days, H=19.6 ~407m) from ARO (Jan. 15.32p4)
- Observations of recently (no longer) risk-listed objects
- K08A04E 2008 AE4 (small asteroid, arc=5 days, H=24.1 ~51m) from ARO (Jan. 15.29p4 & 16.09-10p3)
- K07Y56M 2007 YM56 (small asteroid, arc=18 days, H=22.2 ~123m) from Spacewatch 1.8m (Jan. 17.23-24p3)
- Observations of small asteroids (H>22.0)
- K08A31A 2008 AA31 (Q=4.063 AU, arc=3 days, H=24.2 ~49m) from ARO (Jan. 15.33p4)
- K08A04G 2008 AG4 (arc=7 days, H=24.7 ~39m) from MLS (Jan. 17.40-41p4)
- K08A03F 2008 AF3 (arc=6 days, H=26.1 ~20m) from ARO (Jan. 15.38p5)
- K07Y56T 2007 YT56 (arc=18 days, H=23.4 ~71m) from Spacewatch 1.8m (Jan. 18.17p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08A30Z 2008 AZ30 (arc=4 days, H=21.9 ~141m) from ARO (Jan. 16.05-06p4)
- K06A04M 2006 AM4 (q=0.344 AU, arc=2 opp, H=21.8 ~148m) from ARO (Jan. 15.39-42p5)
- Observations of other objects
- K08A32F 2008 AF32 (arc=3 days, H=20.9 ~224m) from ARO (Jan. 16.23-24p4)
- K08A31B 2008 AB31 (arc=3 days, H=20.2 ~309m) from ARO (Jan. 15.31p3)
- K08A28T 2008 AT28 (arc=6 days, H=18.3 ~741m) from ARO (Jan. 16.31-32p3)
- K08A04H 2008 AH4 (i=67.0°, arc=6 days, H=21.6 ~162m) from ARO (Jan. 15.36-37p5 & 16.41-42p5)
- K08A01X 2008 AX1 (arc=10 days, H=21.3 ~186m) from Spacewatch 1.8m (Jan. 18.18-19p3)
- K07Y56O 2007 YO56 (arc=19 days, H=20.3 ~295m) from Spacewatch 1.8m (Jan. 18.19-20p3)
- K07Y00H 2007 YH (arc=31 days, H=20.1 ~323m) from ARO (Jan. 16.15-17p4)
- K07T24U 2007 TU24 (arc=99 days, H=20.2 ~309m) from CEAMIG-REA (Jan. 17.95p3)
- K07T23C 2007 TC23 (Q=4.524 AU, arc=97 days, H=20.6 ~257m) from ARO (Jan. 15.38-40p4)
- K07N04S 2007 NS4 (arc=2 opp, H=19.0 ~537m) from ARO (Jan. 16.43-44p4)
- K05E70K 2005 EK70 (arc=4 opp, H=17.6 ~1.02 km) from ARO (Jan. 15.50p3)
- K04H33K 2004 HK33 (arc=5 opp, H=17.6 ~1.02 km) from Spacewatch 0.9m (Jan. 17.41-44p3)
- K01J02U 2001 JU2 (arc=4 opp, H=19.4 ~446m) from Spacewatch 0.9m (Jan. 17.44p1)
- H2722 172722 2004 BV102 from the Catalina Sky Survey (CSS) (Jan. 17.38-40p4)
- 01036 1036 Ganymed (1924 TD) from Eridanus Obs. (Jan. 13.89-94p7 & 16.90-93p4)
Observers on 18 January '08
Eight observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2008-B14 & 2008-B16 -- 2008 AZ30, 2008 AT28, 2008 AS28, 2008 AH4, 2008 AF4, 2008 AF32, 2008 AF3, 2008 AE4, 2008 AB31, 2008 AA31, 2007 YH, C/2007 VO53, 2007 TC23, 2007 NS4, 2006 AM4, 2005 EK70 |
| I77 | CEAMIG-REA in Brazil, 1 in MPEC 2008-B14 -- 2007 TU24 |
| 703 | Catalina Sky Survey in Arizona, 1 in MPEC 2008-B14 -- 172722 |
| A27 | Eridanus Obs. in Germany, 1 in MPEC 2008-B14 -- 1036 |
| 701 | Junk Bond Obs. in Arizona, 1 in MPEC 2008-B16 -- C/2007 VO53 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-B14, 2008-B15 & 2008-B16 -- 2008 BE, 2008 AG4, C/2007 VO53 |
| 691 | Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2008-B14 & 2008-B16 -- C/2007 VO53, 2004 HK33, 2001 JU2 |
| 291 | Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2008-B14, 2008-B15 & 2008-B16 -- 2008 BE, 2008 AX1, 2008 AN33, 2008 AL33, 2007 YT56, 2007 YO56, 2007 YM56, C/2007 VO53 |
Impact Risk Monitoring on 18 January '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 AN33 | JPL Sentry | 1549 | 2087-2097 | 3 | 4.4e-10 | -6.48 | -6.90 | 0 | JPL: "Analysis based on 30 observations spanning 1.9788 days (2008-Jan-15.4591 to 2008-Jan-17.4379)." Diameter approximately 0.637 km. from mean, weighted H=18.6. |
| NEODyS | 1549 | R E M O V E D | |||||||
| 2008 AL33 | JPL Sentry | 1549 | R E M O V E D | JPL: Risk listing removed at 1122 UTC. | |||||
| NEODyS | 1549 | R E M O V E D | |||||||
| 2008 AS28 | JPL Sentry | 1549 | 2104 | 1 | 2.4e-10 | -6.94 | -6.94 | 0 | JPL: "Analysis based on 33 observations spanning 5.9323 days (2008-Jan-10.135 to 2008-Jan-16.067258)." Diameter approximately 0.440 km. from mean, weighted H=19.4. |
| NEODyS | 1549 | R E M O V E D | |||||||
| 2008 AF4 | JPL Sentry | 1829 | 2089-2108 | 45 | 2.2e-05 | -2.31 | -2.48 | 1 | JPL: "Analysis based on 87 observations spanning 6.6328 days (2008-Jan-10.39652 to 2008-Jan-17.02932)." Diameter approximately 0.410 km. from mean, weighted H=19.6. |
| NEODyS | 1549 | 2084-2090 | 11 | 1.47e-05 | -2.45 | -2.47 | 1 | NEODyS: "Based on 88 optical observations (of which 1 are rejected as outliers) from 2008/01/10.397 to 2008/01/17.030. NOTE: The Virtual Impactor in 2089/01/09.478 in the table above is rated as Torino Scale 1." | |
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 18 January '08
Times are UTC for when items were noted or added by The Tracking News.
| 2032 | Grabbed MPEC 2008-B16 - Comet C/2007 VO53 (Spacewatch) - see above |
| 1829 | Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above |
| 1549 | Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has removed 2008 AL33 as an impact risk - see above Noted that NEODyS has removed 2008 AL33 as an impact risk - see above Noted that JPL Sentry has updated its 2008 AN33 risk assessment - see above Noted that NEODyS has removed 2008 AN33 as an impact risk - see above Noted that JPL Sentry has updated its 2008 AS28 risk assessment - see above Noted that NEODyS has removed 2008 AS28 as an impact risk - see above Grabbed MPEC 2008-B14 - Daily Orbit Update - see above Grabbed MPEC 2008-B15 - 2008 BE - see above |
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