Contents on 19 February '08
- Radar Astrometry -- one object
- IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- four MPECs
- Observers -- 20 observing facilities
- Impact Risk Monitoring -- four objects
- Chronology
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- Ephemerides for risk-rated and nearby objects
- Old & new CRT Archive
- Old News Archive & Small Objects Archive
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Radar Astrometry on 19 February '08
Radar observation of one object
The JPL Solar System Dynamics Group Radar Astrometry database has added the following small-body radar observing work:
Data addition noted at 2356 UTC when the database was dated 19 Feb.
- 2006 RH120 from Goldstone DSS-14 70m antenna (transmit) with Goldstone DSS-13 34m antenna (receive) at 2007 June 12.08 (velocity) & 14.19 (velocity) and the DSS-14 (transmit) with Goldstone DSS-25 34m antenna (receive) at 2007 June 17.27 (velocity) - see links
NEOCP Activity on 19 February '08
The MPC's NEO Confirmation Page has 2 listings: 2 updated
When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of five objects listed on the NEOCP at some point today.
New MPECs on 19 February '08
Minor Planet Electronic Circulars
As of last check at 2355 UTC, there have been four MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-D13 time-stamped "07:08 UT" - Daily Orbit Update - see below
- MPEC 2008-D14 time-stamped "16:09 UT" - 2008 DB - see below
- MPEC 2008-D15 time-stamped "16:12 UT" - 2008 DC - see below
- MPEC 2008-D16 time-stamped "16:16 UT" - 2008 DD
MPEC 2008-D16 - "16:16 UT" - 2008 DD
- K08D00D 2008 DD (H=20.2 ~309m) was discovered at 1116 UT on 18 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 18.47-55p11 and 19.41-43p4. The discovery was confirmed by Great Shefford Obs. (Feb. 19.02-03p4), Farra d'Isonzo Obs. (Feb. 19.06-07p2), and Sabino Canyon Obs. (Feb. 19.36-37p3).
MPEC 2008-D15 - "16:12 UT" - 2008 DC
- K08D00C 2008 DC (H=19.5 ~426m) was discovered at 0642 UT on 18 Feb. by the Mt. Lemmon Survey (MLS), which observed it at Feb. 18.28-33p8. The discovery was confirmed by Great Shefford Obs. (Feb. 18.93-95p3), Farra d'Isonzo Obs. (Feb. 18.95-99p2), and CSS (Feb. 19.32p4 & 19.41p3).
MPEC 2008-D14 - "16:09 UT" - 2008 DB
- K08D00B 2008 DB (risk-listed, Earth MOID=1.0 LD, H=25.6 ~26m) was discovered at 0548 UT on 18 Feb. by the CSS, which observed it at Feb. 18.24-29p8, 18.36p4, 18.52-53p4, 19.32p2, and 19.41p3. The discovery was confirmed by Sabino Canyon Obs. (Feb. 18.42-43p3), Remanzacco Obs. (Feb. 18.86p2), Guidestar Obs. (Feb. 18.86-91p3), Great Shefford Obs. (Feb. 18.99-01p3), and Farra d'Isonzo Obs. (Feb. 19.02-04p3). This object was within ten lunar distances (LD) of Earth, reaching 4.6 LD on 14 Feb.
<< DOU on 19 Feb. '08 >> MPEC 2008-D13 - "07:08 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08CB8R 2008 CR118 (arc=8 days, H=18.8 ~589m) from Desert Moon Obs. (Feb. 18.28-34p3)
- K08A04F 2008 AF4 (arc=39 days, H=19.7 ~389m) from Wildberg Obs. (Feb. 18.78-80p4)
- Observations of recently (no longer) risk-listed objects
- K08C22D 2008 CD22 (almost small, arc=8 days, H=22.0 ~135m) from Astronomical Research Obs. (ARO) (Feb. 16.22p6)
- K08C22B 2008 CB22 (arc=9 days, H=19.7 ~389m) from ARO (Feb. 16.45-46p3)
- Observations of small asteroids (H>22.0)
- K08CB6K 2008 CK116 (arc=6 days, H=23.4 ~71m) from ARO (Feb. 16.17-19p3)
- K08C22C 2008 CC22 (arc=10 days, H=24.0 ~54m) from Desert Moon Obs. (Feb. 18.22-25p3)
- K08C06C 2008 CC6 (q=0.285 AU, arc=11 days, H=22.1 ~129m) from Desert Moon Obs. (Feb. 18.17-20p4)
- K08C04Y 2008 CY4 (arc=10 days, H=22.4 ~112m) from ARO (Feb. 16.27-28p3)
- Observations of other objects
- K08CB6R 2008 CR116 (arc=7 days, H=20.3 ~295m) from CSS (Feb. 18.22-24p4)
- K08CB6O 2008 CO116 (arc=5 days, H=21.2 ~195m) from ARO (Feb. 16.15p6)
- K08C71D 2008 CD71 (i=47.3°, q=0.364 AU, arc=9 days, H=19.6 ~407m) from ARO (Feb. 16.34-35p3) and Desert Moon Obs. (Feb. 18.37-40p3)
- K08C70N 2008 CN70 (arc=9 days, H=19.2 ~490m) from Desert Moon Obs. (Feb. 18.13-15p3)
- K08C01N 2008 CN1 (arc=16 days, H=20.5 ~269m) from Guidestar Obs. (Feb. 18.84p3 & 18.92p1), Atlante Obs. (Feb. 18.92-93p3), and North Obs. (Feb. 18.94-95p5)
- K08C01L 2008 CL1 (arc=16 days, H=19.1 ~513m) from CSS (Feb. 18.42-44p4) and Hamamatsu-Yuto Obs. (Feb. 18.73-77p7)
- K08C00M 2008 CM (i=36.0°, arc=16 days, H=17.1 ~1.29 km) from Desert Moon Obs. (Feb. 18.10-12p3)
- K08A00E 2008 AE (arc=2 opp, H=19.7 ~389m) from CSS (Feb. 18.32-33p4)
- K07VO3L 2007 VL243 (i=43.3°, q=0.262 AU, arc=46 days, H=17.8 ~933m) from the Siding Spring Survey (SSS) (Nov. 16.62p1)
- K07T24U 2007 TU24 (arc=130 days, H=20.6 ~257m) from CSS (Feb. 18.24-26p4)
- K07P09R 2007 PR9 (arc=85 days, H=20.6 ~257m) from SSS (2007 Aug. 23.63-64p2)
- K07N04S 2007 NS4 (arc=2 opp, H=19.0 ~537m) from MLS (Feb. 18.39-41p4)
- K05E70K 2005 EK70 (arc=4 opp, H=17.5 ~1.07 km) from Hamamatsu-Yuto Obs. (Feb. 18.48-50p3 & 18.55-58p4)
- K02T66D 2002 TD66 (arc=4 opp, H=19.9 ~355m) from Guidestar Obs. (Feb. 18.81-83p3)
- K00Q69Y 2000 QY69 (arc=4 opp, H=19.8 ~371m) from MLS (Feb. 18.28-31p4)
- K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from MLS (Feb. 18.26-28p4)
- G3693 163693 Atira (2003 CP20) from Desert Moon Obs. (Feb. 18.08p4)
- G2510 162510 2000 QW69 from CSS (Feb. 18.53-54p4)
- 09856 9856 1991 EE from MLS (Feb. 18.46-48p4)
- 09400 9400 1994 TW1 from Tenagra II Obs. (Feb. 18.46-49p3)
- 04544 4544 Xanthus (1989 FB) from Atlante Obs. (Feb. 18.94-95p3)
- 04450 4450 Pan (1987 SY) from Vesqueville Obs. (Feb. 17.84-86p8)
- 01620 1620 Geographos (1951 RA) from Hunters Hill Obs. (Feb. 18.51-56p3)
Observers on 19 February '08
A total of 20 observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 6 in MPEC 2008-D13 -- 2008 CY4, 2008 CO116, 2008 CK116, 2008 CD71, 2008 CD22, 2008 CB22 |
| J51 | Atlante Obs. in the Canary Islands, 2 in MPEC 2008-D13 -- 2008 CN1, 4544 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2008-D13, 2008-D14, 2008-D15 & 2008-D16 -- 2008 DD, 2008 DC, 2008 DB, 2008 CR116, 2008 CL1, 2008 AE, 2007 TU24, 162510 |
| 448 | Desert Moon Obs. in New Mexico, 7 in MPEC 2008-D13 -- 2008 CR118, 2008 CN70, 2008 CM, 2008 CD71, 2008 CC6, 2008 CC22, 163693 |
| 595 | Farra d'Isonzo Obs. in Italy, 3 in MPECs 2008-D14, 2008-D15 & 2008-D16 -- 2008 DD, 2008 DC, 2008 DB |
| 252 | Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2006 RH120 |
| 253 | Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2006 RH120 |
| -25 | Goldstone DSS-25 34m antenna in southern California, 1 in radar -- 2006 RH120 |
| J95 | Great Shefford Obs. in England, 3 in MPECs 2008-D14, 2008-D15 & 2008-D16 -- 2008 DD, 2008 DC, 2008 DB |
| A17 | Guidestar Obs. in Germany, 3 in MPECs 2008-D13 & 2008-D14 -- 2008 DB, 2008 CN1, 2002 TD66 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-D13 -- 2008 CL1, 2005 EK70 |
| E14 | Hunters Hill Obs. in Australian Capital Territory, 1 in MPEC 2008-D13 -- 1620 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2008-D13 & 2008-D15 -- 2008 DC, 2007 NS4, 2000 QY69, 2000 DP107, 9856 |
| J69 | North Obs. in England, 1 in MPEC 2008-D13 -- 2008 CN1 |
| 473 | Remanzacco Obs. in Italy, 1 in MPEC 2008-D14 -- 2008 DB |
| 854 | Sabino Canyon Obs. in Arizona, 2 in MPECs 2008-D14 & 2008-D16 -- 2008 DD, 2008 DB |
| E12 | Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-D13 -- 2007 VL243, 2007 PR9 |
| 926 | Tenagra II Obs. in Arizona, 1 in MPEC 2008-D13 -- 9400 |
| 231 | Vesqueville Obs. in Belgium, 1 in MPEC 2008-D13 -- 4450 |
| 198 | Wildberg Obs. in Germany, 1 in MPEC 2008-D13 -- 2008 AF4 |
Impact Risk Monitoring on 19 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 DB | JPL Sentry | 2032 | 2032-2106 | 45 | 4.1e-05 | -4.78 | -4.84 | 0 | JPL: "Analysis based on 34 observations spanning 1.1675 days (2008-Feb-18.242 to 2008-Feb-19.40948)." Diameter approximately 0.025 km. from mean, weighted H=25.6. |
| 2008 CR118 | JPL Sentry | 2200 | R E M O V E D | JPL: Risk listing removed at 2143 UTC. | |||||
| 2008 CL116 | JPL Sentry | 2200 | 2078-2102 | 5 | 1.7e-07 | -4.45 | -4.89 | 0 | JPL: "Analysis based on 57 observations spanning 6.6665 days (2008-Feb-10.40671 to 2008-Feb-17.07319)." Diameter approximately 0.300 km. from mean, weighted H=20.3. |
| 2008 AF4 | JPL Sentry | 2200 | 2078-2101 | 25 | 1.8e-05 | -2.44 | -2.68 | 0 | JPL: "Analysis based on 547 observations spanning 39.399 days (2008-Jan-10.39652 to 2008-Feb-18.79565)." Diameter approximately 0.390 km. from mean, weighted H=19.7. |
| NEODyS | 1556 | 2078-2090 | 9 | 1.17e-05 | -2.59 | -2.68 | 0 | NEODyS: "Based on 551 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/18.796." | |
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 19 February '08
Times are UTC for when items were noted or added by The Tracking News.
| 2356 | Noted Radar Astrometry database addition - see above |
| 2200 | Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 CL116 risk assessment - see above Noted that JPL Sentry has removed 2008 CR118 as an impact risk - see above |
| 2032 | Noted that JPL Sentry has posted 2008 DB as an impact risk - see above |
| 1659 | Grabbed MPEC 2008-D14 - 2008 DB - see above Grabbed MPEC 2008-D15 - 2008 DC - see above Grabbed MPEC 2008-D16 - 2008 DD - see above |
| 1556 | Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Grabbed MPEC 2008-D13 - Daily Orbit Update - see above |
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