Contents on 11 April '08
- IAU Minor Planet Center
- NEOCP Activity -- five listings: 5 updated
- New MPECs -- three MPECs
- Observers -- eleven 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 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 11 April '08
The MPC's NEO Confirmation Page has 5 listings: 5 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five updated listings. All of these were "one nighters." So far The Tracking News has counted a total of eight 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 11 April '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-G65 time-stamped "06:09 UT" - Daily Orbit Update - see below
- MPEC 2008-G66 time-stamped "11:22 UT" - 2008 GO20 - see below
- MPEC 2008-G67 time-stamped "11:29 UT" - 2008 GP20
MPEC 2008-G67 - "11:29 UT" - 2008 GP20
- K08G20P 2008 GP20 (H=19.4 ~446m) was discovered at 0935 UT on 10 April by the Catalina Sky Survey (CSS), which observed it at April 10.40-47p8. The discovery was confirmed by Mt. John Obs. (April 10.59-60p4) and the Mt. Lemmon Survey (MLS) (April 11.30-32p4).
MPEC 2008-G66 - "11:22 UT" - 2008 GO20
- K08G20O 2008 GO20 (risk-listed, Earth MOID=2.4 LD, H=22.1 ~129m) was discovered at 0728 UT on 9 April by MLS, which observed it at April 9.31-33p3 and 11.30-31p4. The discovery was confirmed by the Spacewatch 1.8m telescope (April 11.40p3).
<< DOU on 11 Apr. '08 >> MPEC 2008-G65 - "06:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08G02M 2008 GM2 (small asteroid, arc=3 days, H=28.3 ~7m) from Schiaparelli Obs. (April 7.90-91p3)
- K08G01D 2008 GD1 (small asteroid, arc=8 days, H=22.4 ~112m) from Spacewatch 1.8m (April 11.23-24p3)
- K08G00G 2008 GG (q=0.255 AU, arc=5 days, H=20.2 ~309m) from Astronomical Research Obs. (ARO) (April 6.16-19p3 at V=22.3-5)
- Observations of recently (no longer) risk-listed objects
- K08G00F 2008 GF (arc=5 days, H=20.6 ~257m) from Tiki Obs. (April 5.41p1, 5.46p1 & 5.50p1)
- K08F06T 2008 FT6 (arc=12 days, H=17.6 ~1.02 km) from the Spacewatch 0.9m telescope (April 10.35-39p3)
- Observations of small asteroids (H>22.0)
- K08G20L 2008 GL20 (arc=1 day, H=26.7 ~15m) from Tiki Obs. (April 10.46-49p3)
- K08G02L 2008 GL2 (arc=4 days, H=27.2 ~12m) from Mt. John Obs. (April 10.44-45p3)
- K08F07J 2008 FJ7 (arc=8 days, H=25.9 ~22m) from Spacewatch 0.9m (April 8.17-19p2)
- K07D00D 2007 DD (arc=2 opp, H=25.8 ~23m) from Mt. John Obs. (April 10.51-52p3)
- Observations of other objects
- K08G20K 2008 GK20 (arc=1 day, H=20.7 ~245m) from MLS (April 9.21-26p8 discovery & April 10.20-21p4) and Great Shefford Obs. (April 9.89-90p3)
- K08F06U 2008 FU6 (arc=9 days, H=17.8 ~933m) from Schiaparelli Obs. (April 4.04-07p3)
- K08F06N 2008 FN6 (arc=12 days, H=21.4 ~178m) from Altschwendt Obs. (April 10.98-01p4)
- K08A33M 2008 AM33 (arc=86 days, H=21.3 ~186m) from Tiki Obs. (April 10.50-55p3)
- K07L00L 2007 LL (arc=2 opp, H=20.4 ~282m) from Mt. John Obs. (April 10.64-65p4)
- K05G09L 2005 GL9 (q=0.222 AU, Q=4.060 AU, arc=4 opp, H=17.1 ~1.29 km) from Tiki Obs. (April 5.24-26p2)
- K05B00C 2005 BC (arc=2 opp, H=18.2 ~776m) from Mt. John Obs. (April 10.66-67p3)
- K04F11G 2004 FG11 (arc=2 opp, H=21.0 ~214m) from Schiaparelli Obs. (April 4.02-03p3)
- K02F05W 2002 FW5 (i=46.4°, arc=3 opp, H=19.3 ~467m) from Schiaparelli Obs. (April 3.97-98p4)
- K02AC9J 2002 AJ129 (q=0.117 AU, arc=3 opp, H=18.5 ~676m) from Schiaparelli Obs. (April 4.06-07p3)
- J99S05O 1999 SO5 (arc=2 opp, H=20.9 ~224m) from Schiaparelli Obs. (April 7.82-83p2)
- E4901 144901 2004 WG1 from CSS (April 10.19-21p4)
- E1531 141531 2002 GB from CSS (April 10.40-42p4)
- 11398 11398 1998 YP11 from Urseanu Obs. (March 23.89-91p2)
- 04954 4954 Eric (1990 SQ) from Schiaparelli Obs. (April 3.91-96p3)
- 03757 3757 1982 XB from Spacewatch 0.9m (April 8.28-30p2)
Observers on 11 April '08
Eleven observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| A44 | Altschwendt Obs. in Austria, 1 in MPEC 2008-G65 -- 2008 FN6 |
| H55 | Astronomical Research Obs. in Illinois, 1 in MPEC 2008-G65 -- 2008 GG |
| 703 | Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2008-G65 & 2008-G67 -- 2008 GP20, 144901, 141531 |
| J95 | Great Shefford Obs. in England, 1 in MPEC 2008-G65 -- 2008 GK20 |
| 474 | Mt. John Obs. in New Zealand, 5 in MPECs 2008-G65 & 2008-G67 -- 2008 GP20, 2008 GL2, 2007 LL, 2007 DD, 2005 BC |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-G65, 2008-G66 & 2008-G67 -- 2008 GP20, 2008 GO20, 2008 GK20 |
| 204 | Schiaparelli Obs. in Italy, 7 in MPEC 2008-G65 -- 2008 GM2, 2008 FU6, 2004 FG11, 2002 FW5, 2002 AJ129, 1999 SO5, 4954 |
| 691 | Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-G65 -- 2008 FT6, 2008 FJ7, 3757 |
| 291 | Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2008-G65 & 2008-G66 -- 2008 GO20, 2008 GD1 |
| F85 | Tiki Obs. in Tahiti, 4 in MPEC 2008-G65 -- 2008 GL20, 2008 GF, 2008 AM33, 2005 GL9 |
| A92 | Urseanu Obs. in Romania, 1 in MPEC 2008-G65 -- 11398 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 11 April '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 GO20 | JPL Sentry | 1621 | 2013-2107 | 624 | 2.9e-06 | -4.13 | -5.01 | 0 | JPL: "Analysis based on 10 observations spanning 2.0911 days (2008-Apr-09.31171 to 2008-Apr-11.4028)." Diameter approximately 0.123 km. from mean, weighted H=22.2. |
| 2008 GM2 | JPL Sentry | 1508 | 2063-2108 | 52 | 2.0e-05 | -6.72 | -7.39 | 0 | JPL: "Analysis based on 40 observations spanning 2.7703 days (2008-Apr-06.41278 to 2008-Apr-09.18308)." Diameter approximately 0.008 km. from mean, weighted H=28.3. |
| NEODyS | 1508 | 2063-2089 | 10 | 2.4e-06 | -7.54 | -7.77 | 0 | NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2008/04/06.414 to 2008/04/09.184." | |
| 2008 GD1 | JPL Sentry | 1508 | R E M O V E D | JPL: Risk listing removed at 1054 UTC. | |||||
| NEODyS | 1507 | R E M O V E D | - | ||||||
| 2008 GG | NEODyS | 1507 | R E M O V E D | - | |||||
| JPL Sentry | 0501 | R E M O V E D | JPL: Risk listing removed at 0103 UTC. | ||||||
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 11 April '08
Times are UTC for when items were noted or added by The Tracking News.
| 1621 | Noted that JPL Sentry has posted 2008 GO20 as an impact risk - see above |
| 1508 | Noted that JPL Sentry has removed 2008 GD1 as an impact risk - see above Noted that JPL Sentry has updated its 2008 GM2 risk assessment - see above Noted that NEODyS has updated its 2008 GM2 risk assessment - see above Grabbed MPEC 2008-G65 - Daily Orbit Update - see above Grabbed MPEC 2008-G67 - 2008 GP20 - see above |
| 1507 | Noted that NEODyS has removed 2008 GD1 as an impact risk - see above Noted that NEODyS has removed 2008 GG as an impact risk - see above Grabbed MPEC 2008-G66 - 2008 GO20 - see above |
| 0501 | Noted that JPL Sentry has removed 2008 GG as an impact risk - see above |
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2008 Columbine, Inc. - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com> (HTML 4.01 validation).
Important news updates are flagged by A/CC's RSS news feed (link).