Contents  on 16 January '18

Asteroid/Comet Connection (A/CC) Resources:

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

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. To keep track of what's new each day, watch the Chronology section.

Traffic Report  on 16 January '18

Six objects reported inside ten LD

Six transient natural objects are reported flying within ten lunar distances (LD) of our planet today. Nearest is 2018 AG4, which enters Earth's sphere of gravitational influence (SOI), coming from 3.29 to 1.68 LD.

Earth passage I D ~Size Distance today  Inside ten LD Notes
1.16 LD Jan. 14 2018 AS2 6 m  2.86 to 4.47 LD Jan. 8 - 20 NHATS target
1.40 LD tomorrow 2018 AG4 22 m  1.68 from 3.29 LD Jan. 12 - 22 enters Earth SOI - DOU
1.83 LD Jan. 11 2018 AT2 9 m  8.19 to 9.77 LD Jan. 4 - 17 risk - DOU
2.73 LD Jan. 14 2018 AU2 11 m  4.13 to 5.85 LD Jan. 9 - 19
4.65 LD Jan. 23 2018 AJ 37 m  9.39 from 10.50 LD today - Jan. 30 NHATS target, enters ten LD
6.7   LD yesterday* 2018 AV2 6 m  6.7 to 6.7 LD Nov. 10 - March 3 EPU +/- 7.87 hours*, NHATS target, natural? - DOU
Approaching (sorted by 10-LD bubble entry date)
3.7   LD Feb. 24* 2017 DR109 10 m  71.7 from 74.0 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
3.76 LD March 7 2017 VR12 270 m  66.40 from 67.72 LD Feb. 28 - March 13 radar/NHATS target
6.9   LD March 10* 2015 DK200 26 m  114.6 from 117.5 LD March 6 - 14 EPU +/- 23.45 hours*, NHATS target
* EPU = Earth passage uncertainty

This report was updated at 2221 UTC with the discovery of just departed 2018 AW11 (MPEC), which went by us at 7.09 LD on January 10th. Your first local asteroid traffic report was generated at 2002 UTC with first follow-up for inbound 2018 AG4 and departed 2018 AJ3 in today's DOU MPEC along with continuing follow-up for inbound 2018 AT2 and [outbound?] 2018 AV2.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. Object temporal distances are derived by A/CC from JPL Horizons data. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 16 January '18

The MPC's NEO Confirmation Page has 109 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 109 objects listed. Of these, 68 were "one nighters." So far The Tracking News has counted a total of 129 listings on the NEOCP today.

New MPECs  on 16 January '18

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been thirteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-B13 - "20:52 UT" - 2018 AA12


MPEC 2018-B12 - "20:49 UT" - 2018 AU11


MPEC 2018-B11 - "20:45 UT" - 2003 UO12 = 2018 AX11

Id. F. Manca


MPEC 2018-B10 - "20:43 UT" - 2018 AD12


MPEC 2018-B09 - "20:38 UT" - 2018 AC12


MPEC 2018-B08 - "20:34 UT" - 2018 AB12


MPEC 2018-B07 - "20:30 UT" - 2018 AZ11


MPEC 2018-B06 - "20:26 UT" - 2018 AY11


MPEC 2018-B05 - "20:22 UT" - 2018 AX11


MPEC 2018-B04 - "20:18 UT" - 2018 AW11


MPEC 2018-B03 - "20:14 UT" - 2018 AV11


MPEC 2018-B02 - "20:09 UT" - 2018 AT11


<< DOU on 16 Jan. '18 >>  MPEC 2018-B01 - "13:06 UT" - Daily Orbit Update

Observers  on 16 January '18

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
T08ATLAS Mauna Loa in Hawaii, 24 in MPECs 2018-B01 & 2018-B05 -- 2018 AX11, 2018 AF1, 2017 QL33, 2016 AU8, 2013 TH5, 1999 AF4, 88188, 53110, 507366, 505667, 439908, 306383, 302311, 259802, 21374, 190208, 17511, 162011, 154991, 154589, 153349, 143992, 137805, 8037
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2018-B03 -- 2018 AV11
160Castelmartini Obs. in Italy, 18 in MPEC 2018-B01 -- 2018 AG, 2017 QL33, 2016 AU8, 2015 YR1, 1999 AF4, 68278, 507366, 505667, 439908, 306383, 302311, 259802, 190208, 162011, 143992, 8567, 7977, 6053
703Catalina Sky Survey (CSS) in Arizona, 46 in MPECs 2018-B01, 2018-B05, 2018-B09 & 2018-B13 -- 2018 AX11, 2018 AQ2, 2018 AG, 2018 AC12, 2018 AA12, 2017 YS8, 2017 YR1, 2017 XH62, 2015 YR1, 2015 BS509, 2014 QS439, 2013 PX6, 2009 QL8, 2009 EV, 2005 BS27, 2004 BB, 2000 YG29, 1999 AF4, 68278, 507366, 496861, 496816, 495848, 439908, 411201, 338176, 333888, 306383, 302311, 27346, 262623, 172034, 162011, 152931, 143992, 142040, 137925, 136923, 136839, 11500, 11405, 100926, 6050, 2329, 2202, 1866
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2018-B01, 2018-B02 & 2018-B10 -- 2018 AT11, 2018 AD12, 2017 YZ5, 2017 YA7, 2017 RK1
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2018-B01, 2018-B03 & 2018-B05 -- 2018 AX11, 2018 AV11, 2018 AT2
K88GINOP-KHK in Hungary, 2 in MPECs 2018-B04 & 2018-B05 -- 2018 AX11, 2018 AW11
A17Guidestar Obs. in Germany, 1 in MPEC 2018-B05 -- 2018 AX11
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-B01 -- 162361
Z21LCO Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2018-B01 -- 306383
Z17LCO Tenerife Aqawan A#2 in the Canary Islands, 1 in MPEC 2018-B01 -- 306383
H01Magdalena Ridge Obs. (MRO) in New Mexico, 9 in MPECs 2018-B03, 2018-B04, 2018-B05, 2018-B06, 2018-B07, 2018-B09, 2018-B10, 2018-B12 & 2018-B13 -- 2018 AZ11, 2018 AY11, 2018 AX11, 2018 AW11, 2018 AV11, 2018 AU11, 2018 AD12, 2018 AC12, 2018 AA12
711McDonald Obs. in Texas, 3 in MPECs 2018-B03, 2018-B04 & 2018-B05 -- 2018 AX11, 2018 AW11, 2018 AV11
G96Mt. Lemmon Survey (MLS) in Arizona, 37 in MPECs 2018-B01, 2018-B03, 2018-B04, 2018-B06, 2018-B07, 2018-B08, 2018-B09 & 2018-B12 -- 2018 AZ11, 2018 AY11, 2018 AW11, 2018 AV2, 2018 AV11, 2018 AU11, 2018 AC12, 2018 AB12, 2017 YC8, 2017 TC4, 2017 OA, 2016 GZ215, 2015 FO124, 2015 DP, 2012 BV26, 2002 RN38, 2002 LX, 1997 GC32, 96315, 53435, 505667, 490684, 35432, 317685, 276703, 265187, 259802, 216707, 162273, 162038, 153311, 142348, 140039, 9950, 8567, 7336, 5836
Z80Northolt Branch Obs. in England, 3 in MPECs 2018-B01 & 2018-B05 -- 2018 AX11, 2018 AG4, 2017 YN3
C23Olmen Obs. in Belgium, 3 in MPECs 2018-B01 & 2018-B05 -- 2018 AX11, 1999 AF4, 3122
F51Pan-STARRS 1 (PS1) in Hawaii, 32 in MPECs 2018-B01, 2018-B02, 2018-B10, 2018-B12 & 2018-B13 -- 2018 AY, 2018 AU11, 2018 AT11, 2018 AH3, 2018 AD12, 2018 AA12, 2017 YR4, 2017 YK5, 2017 WR13, 2017 UF52, 2017 SL2, 2015 YR1, 2015 BN509, 2011 JX1, 2007 LF, 2004 BB, 2002 RN38, 2000 DV110, 89355, 85709, 497094, 417816, 411201, 351331, 331510, 322775, 302311, 163692, 142464, 142040, 141874, 1036
L04ROASTERR-1 in Romania, 2 in MPECs 2018-B04 & 2018-B05 -- 2018 AX11, 2018 AW11
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-B01 -- 2018 AN2
645Sloan Digital Sky Survey (SDSS) in New Mexico, 19 in MPEC 2018-B01 -- 2012 VZ36, 2012 UU136, 2012 SN30, 2012 SB22, 2012 PC20, 2012 NP, 2012 MK6, 2012 KL18, 2012 KF47, 2012 JB16, 2012 EY11, 2012 DH61, 505178, 482562, 463360, 459458, 436764, 436763, 420591
691Spacewatch 0.9m telescope in Arizona, 12 in MPECs 2018-B01, 2018-B03, 2018-B04 & 2018-B07 -- 2018 AZ11, 2018 AX, 2018 AW11, 2018 AV2, 2018 AV11, 2018 AT2, 2017 YM6, 2017 YJ7, 2017 YB8, 2017 XL62, 2017 WS12, 2015 OX78
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2018-B01 & 2018-B10 -- 2018 AD12, 2017 RL1, 2014 BR8
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-B01 -- 2014 QW296
I52Steward Obs. Mt. Lemmon Station in Arizona, 16 in MPECs 2018-B01, 2018-B03, 2018-B04, 2018-B05, 2018-B06, 2018-B07, 2018-B08, 2018-B09, 2018-B12 & 2018-B13 -- 2018 AZ11, 2018 AY11, 2018 AX11, 2018 AW11, 2018 AV11, 2018 AU11, 2018 AR2, 2018 AO2, 2018 AN2, 2018 AM3, 2018 AJ3, 2018 AH2, 2018 AC12, 2018 AB12, 2018 AA12, 2017 YU3
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2018-B01 -- 2004 FH
718Wiggins Obs. in Utah, 1 in MPEC 2018-B05 -- 2018 AX11
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 January '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 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 NASA/JPL 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
2018 AB12JPL Sentry23582025-21174192.25292772e-05-4.46-5.140JPL: Computed at 15:44 today Pacific time based on 17 observations spanning 1.9483 days (2018-Jan-14.37714 to 2018-Jan-16.32547). Diameter approximately 0.043 km. from weighted mean H=24.47.
2018 AH3JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1632 UTC today
2018 AV2JPL Sentry1630R E M O V E DJPL: Risk listing removed at 1603 UTC today
2018 AT2JPL Sentry16302115-211515.263e-08-9.05-9.050JPL: Computed at 07:59 today Pacific time based on 24 observations spanning 3.1635 days (2018-Jan-12.34078 to 2018-Jan-15.50432). Diameter approximately 0.009 km. from weighted mean H=27.79.
2004 FHJPL Sentry1950R E M O V E DJPL: Risk listing removed at 1825 UTC today

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

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 16 January '18

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

2358Noted that JPL Sentry has posted 2018 AB12 as an impact risk - see above
2221Updated Traffic Report
2102Grabbed MPEC 2018-B07 - 2018 AZ11 - see above
Grabbed MPEC 2018-B08 - 2018 AB12 - see above
Grabbed MPEC 2018-B09 - 2018 AC12 - see above
Grabbed MPEC 2018-B10 - 2018 AD12 - see above
Grabbed MPEC 2018-B11 - 2003 UO12 = 2018 AX11 - see above
Grabbed MPEC 2018-B12 - 2018 AU11 - see above
Grabbed MPEC 2018-B13 - 2018 AA12 - see above
2030Grabbed MPEC 2018-B02 - 2018 AT11 - see above
Grabbed MPEC 2018-B03 - 2018 AV11 - see above
Grabbed MPEC 2018-B04 - 2018 AW11 - see above
Grabbed MPEC 2018-B05 - 2018 AX11 - see above
Grabbed MPEC 2018-B06 - 2018 AY11 - see above
1950Noted that JPL Sentry has removed 2004 FH as an impact risk - see above
1700Noted that JPL Sentry has removed 2018 AH3 as an impact risk - see above
1630Noted that JPL Sentry has updated its 2018 AT2 risk assessment - see above
Noted that JPL Sentry has removed 2018 AV2 as an impact risk - see above
1600Grabbed MPEC 2018-B01 - Daily Orbit Update - see above