Contents  on 19 January '13

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed 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.

Traffic Report  on 19 January '13

Five objects reported inside ten LD

There are five asteroids reported flying within ten lunar distances (LD) of Earth today. 2013 BT15 is inbound from 5.53 to 4.83 LD while 2013 AP72 is outbound from 5.12 to 6.97 LD, and three cross the ten-LD reporting "bubble." 2013 AT72 comes inside, traveling from 10.81 to 9.98 LD, and two newly discovered objects exit: 2013 BM18 traveling from 8.48 to 10.43 LD and 2013 BQ18 from 9.07 to 10.26 LD.

Coming to the neighborhood next, risk-listed 2013 BV15 is calculated with great uncertainty to come inside ten LD on February 6th, and intruder 2012 DA14 (risk-listed radar target) arrives February 8th.

This report was generated at 1900 UTC with new discoveries 2013 BQ18 (MPEC), 2013 BM18 (MPEC), and departed 2013 BL18 (MPEC), and follow-up in today's DOU MPEC for 2013 AT72 and departed objects 2013 AC53, 2013 AD32, and 2013 AT27.


Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 19 January '13

The MPC's NEO Confirmation Page has 141 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 141 objects listed. Of these, 128 were "one nighters." So far The Tracking News has counted a total of 232 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 19 January '13

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been 21 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-B50 - "21:30 UT" - 2013 AS105 = 2010 AO137


MPEC 2013-B49 - "17:39 UT" - 2013 BE19


MPEC 2013-B48 - "14:26 UT" - 2013 BP18


MPEC 2013-B47 - "13:53 UT" - 2013 BJ18


MPEC 2013-B46 - "13:50 UT" - 2013 BT18


MPEC 2013-B45 - "13:47 UT" - 2013 BS18


MPEC 2013-B44 - "13:44 UT" - 2013 BR18


MPEC 2013-B43 - "13:37 UT" - 2013 BQ18


MPEC 2013-B42 - "13:34 UT" - 2013 BO18


MPEC 2013-B41 - "13:31 UT" - 2013 BN18


MPEC 2013-B40 - "13:29 UT" - 2013 BJ18


MPEC 2013-B39 - "13:27 UT" - 2013 BM18


MPEC 2013-B38 - "13:24 UT" - 2013 BL18


MPEC 2013-B37 - "13:21 UT" - 2013 BK18


MPEC 2013-B36 - "13:18 UT" - 2013 BH18


MPEC 2013-B35 - "13:15 UT" - 2013 BG18


MPEC 2013-B34 - "13:12 UT" - 2013 BF18


MPEC 2013-B33 - "13:09 UT" - 2013 BE18


MPEC 2013-B32 - "13:06 UT" - 2013 BD18


MPEC 2013-B31 - "13:03 UT" - 2013 BC18


<< DOU on 19 Jan. '13 >>  MPEC 2013-B30 - "06:04 UT" - Daily Orbit Update

Observers  on 19 January '13

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2013-B30 -- 17188
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2013-B30, 2013-B31, 2013-B33, 2013-B35, 2013-B36, 2013-B37, 2013-B40, 2013-B43, 2013-B46, 2013-B47 & 2013-B49 -- 2013 BT18, 2013 BQ18, 2013 BK18, 2013 BJ18, 2013 BH18, 2013 BG18, 2013 BE19, 2013 BE18, 2013 BC18, 2013 AO60, 2013 AN20, 2013 AE69, 2013 AD32, 2012 XR93, 2012 VJ46
300Bisei Spaceguard Center in Japan, 3 in MPECs 2013-B43, 2013-B48 & 2013-B49 -- 2013 BQ18, 2013 BP18, 2013 BE19
703Catalina Sky Survey (CSS) in Arizona, 20 in MPECs 2013-B30, 2013-B32, 2013-B38, 2013-B39, 2013-B41, 2013-B48, 2013-B49 & 2013-B50 -- 2013 BP18, 2013 BN18, 2013 BM18, 2013 BL18, 2013 BE19, 2013 BD18, 2013 AW60, 2013 AS105, 2012 VL94, 2012 PQ28, 2009 XF2, 2009 BD2, 338049, 277039, 212359, 189058, 137199, 137099, 5828, 1864
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2013-B49 -- 2013 BE19
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2013-B50 -- 2013 AS105
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2013-B48 & 2013-B49 -- 2013 BP18, 2013 BE19
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 2 in MPECs 2013-B33 & 2013-B35 -- 2013 BG18, 2013 BE18
C40Kuban State Univ. Obs. in Russia, 1 in MPEC 2013-B30 -- 99942
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-B32 -- 2013 BD18
H01Magdalena Ridge Obs. (MRO) in New Mexico, 13 in MPECs 2013-B30, 2013-B31, 2013-B32, 2013-B33, 2013-B34, 2013-B35, 2013-B36, 2013-B37, 2013-B39, 2013-B40, 2013-B41, 2013-B43, 2013-B45 & 2013-B47 -- 2013 BS18, 2013 BQ18, 2013 BN18, 2013 BM18, 2013 BK18, 2013 BJ18, 2013 BH18, 2013 BG18, 2013 BF18, 2013 BE18, 2013 BD18, 2013 BC18, 101955
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2013-B37 & 2013-B42 -- 2013 BO18, 2013 BK18
711McDonald Obs. in Texas, 1 in MPECs 2013-B40 & 2013-B47 -- 2013 BJ18
900Moriyama Obs. in Japan, 1 in MPEC 2013-B49 -- 2013 BE19
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2013-B30, 2013-B31, 2013-B32, 2013-B39, 2013-B40, 2013-B43, 2013-B44, 2013-B45 & 2013-B50 -- 2013 BS18, 2013 BR18, 2013 BQ18, 2013 BM18, 2013 BJ18, 2013 BD18, 2013 BC18, 2013 AS105, 2002 XQ40, 2002 AW, 2001 RB18, 214869, 153958, 3199
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2013-B30 -- 2013 AA2, 2009 BL2
F51Pan-STARRS 1 (PS1) in Hawaii, 26 in MPECs 2013-B30, 2013-B33, 2013-B34, 2013-B35, 2013-B36, 2013-B37, 2013-B38, 2013-B40, 2013-B42, 2013-B46 & 2013-B47 -- 2013 BT18, 2013 BO18, 2013 BL18, 2013 BK18, 2013 BJ18, 2013 BH18, 2013 BG18, 2013 BF18, 2013 BE18, 2012 YK7, 2012 QC8, 2009 SC15, 2005 TE15, 86819, 52761, 330825, 238063, 22753, 190161, 168378, 159923, 159533, 140039, 11311, 3757, 1627
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2013-B30 -- 2013 BU2, 2013 AU76, 2013 AU27, 2013 AT76, 2013 AT72, 2013 AA2, 2012 XF112, 2012 PQ28, 2010 BB
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-B37 & 2013-B38 -- 2013 BL18, 2013 BK18
204Schiaparelli Obs. in Italy, 2 in MPECs 2013-B38 & 2013-B39 -- 2013 BM18, 2013 BL18
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2013-B30 & 2013-B50 -- 2013 AS105, 2005 RN33, 1998 QR15, 330809, 229007, 159923, 5189
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2013-B30, 2013-B33 & 2013-B37 -- 2013 BK18, 2013 BE18, 2013 AT27, 2013 AN60, 2013 AC53, 2012 YP6
G52Stone Edge Obs. in northern California, 1 in MPEC 2013-B30 -- 2013 BU2
I15Wishing Star Obs. in Rhode Island, 5 in MPEC 2013-B30 -- 2013 AU76, 2013 AT72, 2013 AJ91, 229672, 154347
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-B49 -- 2013 BE19
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 January '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 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
2013 BS18NEODyS17512042-206344.89e-10-7.41-7.530NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2013-01-18.365 to 2013-01-19.386."
JPL Sentry17062017-2100202.5e-08-6.27-6.940JPL: "Analysis based on 12 observations spanning 1.0217 days (2013-Jan-18.36396 to 2013-Jan-19.38565)." Diameter approximately 0.098 km. from mean, weighted H=22.7.
2013 BL18NEODyS17512070-209261.24e-05-5.47-5.650NEODyS: "Based on 20 optical observations (of which 1 are rejected as outliers) from 2013-01-17.285 to 2013-01-19.367."
JPL Sentry17062070-209251.1e-05-5.52-5.700JPL: "Analysis based on 20 observations spanning 2.0823 days (2013-Jan-17.28384 to 2013-Jan-19.36616)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
2013 BG18JPL Sentry17062029-2102288.2e-09-5.92-6.900JPL: "Analysis based on 19 observations spanning 2.7762 days (2013-Jan-16.49759 to 2013-Jan-19.27378)." Diameter approximately 0.237 km. from mean, weighted H=20.8.
2013 BF18JPL Sentry17062024-2112532.9e-08-5.07-5.840JPL: "Analysis based on 11 observations spanning 2.7453 days (2013-Jan-16.49692 to 2013-Jan-19.24221)." Diameter approximately 0.296 km. from mean, weighted H=20.3.
2013 BV15NEODyS17072025-2097437.94e-07-5.57-5.910NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2013-01-17.482 to 2013-01-18.505."
JPL Sentry01392020-21123134.9e-06-4.87-5.670JPL: "Analysis based on 11 observations spanning 1.0232 days (2013-Jan-17.48093 to 2013-Jan-18.50416)." Diameter approximately 0.050 km. from mean, weighted H=24.1.
2013 BU15NEODyS17072026-205024.57e-07-5.07-5.070NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2013-01-17.351 to 2013-01-18.514."
2013 BS15NEODyS17072020-2100651.69e-06-5.67-6.450NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2013-01-16.507 to 2013-01-17.445."
JPL Sentry01022020-21123393.9e-06-5.43-6.400JPL: "Analysis based on 6 observations spanning .93837 days (2013-Jan-16.50593 to 2013-Jan-17.444299)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
2013 BR15NEODyS17072098-209811.18e-09-9.20-9.20NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2013-01-16.503 to 2013-01-18.303."
JPL Sentry00292095-211054.6e-08-7.57-7.770JPL: "Analysis based on 10 observations spanning 1.8009 days (2013-Jan-16.50178 to 2013-Jan-18.30272)." Diameter approximately 0.032 km. from mean, weighted H=25.1.

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 19 January '13

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

2210Grabbed MPEC 2013-B50 - 2013 AS105 = 2010 AO137 - see above
1900Generated Traffic Report
1751Noted that NEODyS has posted 2013 BL18 as an impact risk - see above
Noted that NEODyS has posted 2013 BS18 as an impact risk - see above
Grabbed MPEC 2013-B49 - 2013 BE19 - see above
1706Noted that JPL Sentry has posted 2013 BF18 as an impact risk - see above
Noted that JPL Sentry has posted 2013 BG18 as an impact risk - see above
Noted that JPL Sentry has posted 2013 BL18 as an impact risk - see above
Noted that NEODyS has posted 2013 BR15 as an impact risk - see above
Noted that NEODyS has posted 2013 BS15 as an impact risk - see above
Noted that JPL Sentry has posted 2013 BS18 as an impact risk - see above
Noted that NEODyS has posted 2013 BU15 as an impact risk - see above
Noted that NEODyS has posted 2013 BV15 as an impact risk - see above
Grabbed MPEC 2013-B30 - Daily Orbit Update - see above
Grabbed MPEC 2013-B31 - 2013 BC18 - see above
Grabbed MPEC 2013-B32 - 2013 BD18 - see above
Grabbed MPEC 2013-B33 - 2013 BE18 - see above
Grabbed MPEC 2013-B34 - 2013 BF18 - see above
Grabbed MPEC 2013-B35 - 2013 BG18 - see above
Grabbed MPEC 2013-B36 - 2013 BH18 - see above
Grabbed MPEC 2013-B37 - 2013 BK18 - see above
Grabbed MPEC 2013-B38 - 2013 BL18 - see above
Grabbed MPEC 2013-B39 - 2013 BM18 - see above
Grabbed MPEC 2013-B40 - 2013 BJ18 - see above
Grabbed MPEC 2013-B41 - 2013 BN18 - see above
Grabbed MPEC 2013-B42 - 2013 BO18 - see above
Grabbed MPEC 2013-B43 - 2013 BQ18 - see above
Grabbed MPEC 2013-B44 - 2013 BR18 - see above
Grabbed MPEC 2013-B45 - 2013 BS18 - see above
Grabbed MPEC 2013-B46 - 2013 BT18 - see above
Grabbed MPEC 2013-B47 - 2013 BJ18 - see above
Grabbed MPEC 2013-B48 - 2013 BP18 - see above
0139Noted that JPL Sentry has posted 2013 BV15 as an impact risk - see above
0102Noted that JPL Sentry has posted 2013 BS15 as an impact risk - see above
0029Noted that JPL Sentry has posted 2013 BR15 as an impact risk - see above