2007-12-27 Tracking News

Contents on 27 December '07

IAU Minor Planet Center
- NEOCP Activity -- two listings: 1 new, 1 updated
- New MPECs -- one MPEC
- Observers -- nine observing facilities
Impact Risk Monitoring -- one object
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 27 December '07

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and one updated listing. Of these, one was a "one nighter."

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 27 December '07

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 27 Dec. '07 >> MPEC 2007-Y50 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K07Y02B 2007 YB2 (Q=4.994 AU, arc=7 days, H=18.2 ~776m) from Astronomical Research Obs. (ARO) (Dec. 25.35-37p3)
Observations of recently (no longer) risk-listed objects
K07Y00Z 2007 YZ (arc=9 days, H=19.8 ~371m) from Paus Obs. (Dec. 26.94-95p2)
Observations of other objects
K07Y01X 2007 YX1 (Q=4.543 AU, arc=66 days, H=17.2 ~1.23 km) from Stia Obs. (Dec. 26.71-72p4)
K07Y01M 2007 YM1 (arc=9 days, H=20.8 ~234m) from Stia Obs. (Dec. 26.76-78p4)
K07X16H 2007 XH16 (arc=18 days, H=19.6 ~407m) from Great Shefford Obs. (Dec. 25.93-94p3), La Fecha Obs. (Dec. 26.94-98p4), and Farra d'Isonzo Obs. (Dec. 26.96-97p3)
K07W55F 2007 WF55 (arc=26 days, H=19.1 ~513m) from La Fecha Obs. (Dec. 27.05p1 & 27.11p1)
K07U03R 2007 UR3 (arc=2 opp, H=21.2 ~195m) from Marc W. Buie via Kitt Peak Natl. Obs. (KPNO) (2003 Oct. 22.13p1 & 2003 Oct. 22.19p1)
K07T15G 2007 TG15 (arc=78 days, H=19.6 ~407m) from New Millennium Obs. (Dec. 17.88-91p6)
K07N04S 2007 NS4 (arc=163 days, H=19.0 ~537m) from ARO (Dec. 25.43-44p3)
K05X08K 2005 XK8 (arc=2 opp, H=19.8 ~371m) from New Millennium Obs. (Dec. 17.93p2)
K05X01D 2005 XD1 (arc=2 opp, H=19.1 ~513m) from New Millennium Obs. (Dec. 17.94-01p10) and La Fecha Obs. (Dec. 27.01p1 & 27.08p1)
K03YB7S 2003 YS117 (arc=3 opp, H=18.3 ~741m) from ARO (Dec. 25.25-26p3)
K03B84H 2003 BH84 (arc=2 opp, H=16.9 ~1.41 km) from New Millennium Obs. (Dec. 17.89-92p6)
K02C26F 2002 CF26 (arc=5 opp, H=17.2 ~1.23 km) from ARO (Dec. 25.42-43p3)
K01V05K 2001 VK5 (arc=4 opp, H=17.8 ~933m) from ARO (Dec. 25.38-41p3)
K00S08B 2000 SB8 (arc=2 opp, H=19.1 ~513m) from ARO (Dec. 25.31-33p3)
K00E70R 2000 ER70 (i=36.9°, arc=4 opp, H=16.9 ~1.41 km) from ARO (Dec. 25.45-46p3)
J93T02Q 1993 TQ2 (arc=2 opp, H=20.0 ~339m) from New Millennium Obs. (Dec. 17.96-03p10)
J90S00M 1990 SM (arc=4 opp, H=16.1 ~2.04 km, q=0.491 AU) from ARO (Dec. 25.28-30p3)
H0903 170903 2004 WS2 from New Millennium Obs. (Dec. 17.90-93p6)
F3591 153591 2001 SN263 from La Fecha Obs. (Dec. 26.99-03p2 & 27.09p1)
D8947 138947 2001 BA40 from New Millennium Obs. (Dec. 18.09p2)
99935 99935 2002 AV4 from Montana Blanca Obs. (Dec. 26.93p1)
85804 85804 1998 WQ5 from New Millennium Obs. (Dec. 17.88-92p6)
68359 68359 2001 OZ13 from New Millennium Obs. (Dec. 18.05-12p10)
21374 21374 1997 WS22 from New Millennium Obs. (Dec. 17.88p2)
18736 18736 1998 NU from New Millennium Obs. (Dec. 17.89-93p6)
01580 1580 Betulia (1950 KA) from New Millennium Obs. (Dec. 17.90-94p5)

Observers on 27 December '07

Nine observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2007-Y50 -- 2007 YB2, 2007 NS4, 2003 YS117, 2002 CF26, 2001 VK5, 2000 SB8, 2000 ER70, 1990 SM
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2007-Y50 -- 2007 XH16
`J95`	Great Shefford Obs. in England, 1 in MPEC 2007-Y50 -- 2007 XH16
`6951`	Marc W. Buie via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2007-Y50 -- 2007 UR3
`J34`	La Fecha Obs. in Spain, 4 in MPEC 2007-Y50 -- 2007 XH16, 2007 WF55, 2005 XD1, 153591
`J46`	Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2007-Y50 -- 99935
`A24`	New Millennium Obs. in Italy, 12 in MPEC 2007-Y50 -- 2007 TG15, 2005 XK8, 2005 XD1, 2003 BH84, 1993 TQ2, 85804, 68359, 21374, 18736, 170903, 138947, 1580
`B49`	Paus Obs. in Spain, 1 in MPEC 2007-Y50 -- 2007 YZ
`A78`	Stia Obs. in Italy, 2 in MPEC 2007-Y50 -- 2007 YX1, 2007 YM1

Impact Risk Monitoring on 27 December '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
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

2007 YB2	NEODyS	1706	2040-2084	3	5.74e-08	-3.72	-3.76	0	NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2007/12/18.346 to 2007/12/25.452."
2007 YB2	JPL Sentry	1431	2043-2098	4	5.9e-08	-3.74	-3.79	0	JPL: "Analysis based on 44 observations spanning 7.1059 days (2007-Dec-18.34552 to 2007-Dec-25.45139)." Diameter approximately 0.786 km. from mean, weighted H=18.2.

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 27 December '07

Times are UTC for when items were noted or added by The Tracking News.

1905	The NEOCP has become active
1706	Noted that NEODyS has updated its 2007 YB2 risk assessment - see above
1431	Noted that JPL Sentry has updated its 2007 YB2 risk assessment - see above Grabbed MPEC 2007-Y50 - Daily Orbit Update - see above

http://www.HohmannTransfer.com/mn/07/07361_1227.htm
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2007 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).