Contents  on 15 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 15 January '18

Five objects reported inside ten LD

Five planetesimals are reported inside ten lunar distances (LD) of Earth today. Nearest is 2018 AS2, which exits Earth's SOI, moving out from 1.47 to 2.86 LD.

Earth passage I D ~Size Distance today  Inside ten LD Notes
1.16 LD yesterday 2018 AS2 6 m  1.47 to 2.86 LD Jan. 8 - 20 NHATS target, exits Earth SOI
1.40 LD Jan. 17 2018 AG4 22 m  3.29 from 5.23 LD Jan. 12 - 22 NEW - MPEC
1.83 LD Jan. 11 2018 AT2 10 m  6.62 to 8.18 LD Jan. 4 - 17 risk
2.73 LD yesterday 2018 AU2 11 m  2.91 to 4.13 LD Jan. 9 - 19
6.7   LD tomorrow* 2018 AV2 6 m  6.7 from 6.7 LD Nov. 12 - March 4 EPU +/- 2.73 days*, NHATS target,
risk, natural? - DOU
Approaching (sorted by 10-LD bubble entry date)
4.65 LD Jan. 23 2018 AJ 37 m  10.50 from 11.64 LD tomorrow - Jan. 30 NHATS target
3.7   LD Feb. 24* 2017 DR109 10 m  74.0 from 76.4 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
3.76 LD March 7 2017 VR12 270 m  67.72 from 69.04 LD Feb. 28 - March 13 radar/NHATS target - DOU
6.9   LD March 10* 2015 DK200 26 m  117.5 from 120.5 LD March 6 - 14 EPU +/- 23.45 hours*, NHATS target
* EPU = Earth passage uncertainty

This report was updated at 2110 UTC with the discoveries of inbound 2018 AG4 (MPEC) and departed 2018 AA4 (MPEC), which flew by our planet at 3.53 LD on January 10th. Today's DOU MPEC reports the recovery of distant objects 2013 AT72 and 2008 UB95, first follow-up for risk-listed objects inbound 2018 AV2 (passage uncertainty improved to +/- 2.73 days) and departed 2017 YV8 (10.12 days added to 0.95-day discovery arc), and also for recovered distant 450894 2008 BT18 (19.95 days added to 0.02-day observing arc), plus continuing follow-up for approaching 2017 VR12 and three departed objects: 2017 VA15, 2017 XN60, and intruder 2018 AH.



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. "Distant" is used here to describe objects that have approached Earth within ten LD since A/CC began these traffic reports eleven years ago but are not presently coming so close. Object temporal distances are derived 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 15 January '18

The MPC's NEO Confirmation Page has 80 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 80 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 103 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 15 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-A91 - "18:43 UT" - 2018 AA4


MPEC 2018-A90 - "18:38 UT" - 2018 AW3


MPEC 2018-A89 - "18:34 UT" - 2018 AG4


MPEC 2018-A88 - "18:30 UT" - 2018 AF4


MPEC 2018-A87 - "18:26 UT" - 2018 AE4


MPEC 2018-A86 - "18:23 UT" - 2018 AD4


MPEC 2018-A85 - "18:19 UT" - 2018 AC4


MPEC 2018-A84 - "18:15 UT" - 2018 AB4


MPEC 2018-A83 - "18:10 UT" - 2018 AZ3


MPEC 2018-A82 - "18:04 UT" - 2018 AY3


MPEC 2018-A81 - "17:59 UT" - 2018 AX3


MPEC 2018-A80 - "17:50 UT" - 1999 SJ10


<< DOU on 15 Jan. '18 >>  MPEC 2018-A79 - "13:05 UT" - Daily Orbit Update

Observers  on 15 January '18

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPEC 2018-A79 -- 2017 YX3, 2017 XN60, 2017 XC1, 2017 XB62, 2017 WX13, 2017 VV13, 2017 VK2, 2017 VD14, 2017 VA15, 2017 TW4, 2017 RQ2, 2017 OT18, 2015 XP129, 2011 ET29, 2010 JF88, 2008 UB95, 2008 ON, 358744, 322775, 311066
T05ATLAS Haleakala in Hawaii, 28 in MPEC 2018-A79 -- 2017 YP4, 2017 YN3, 2017 VR12, 2017 QL33, 2016 AU8, 96590, 88188, 504928, 475967, 36284, 348314, 302311, 281365, 208023, 17511, 16657, 154555, 154347, 137924, 137062, 137052, 12711, 111253, 11066, 6053, 3122, 1864, 1580
T08ATLAS Mauna Loa in Hawaii, 19 in MPEC 2018-A79 -- 2017 YR1, 2009 EV, 2004 BB, 505667, 496818, 495848, 411201, 385580, 333888, 164121, 162038, 142040, 138013, 136923, 136849, 7977, 6050, 2329, 2202
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2018-A81 -- 2018 AX3
160Castelmartini Obs. in Italy, 7 in MPECs 2018-A79 & 2018-A91 -- 2018 AA4, 2007 AG, 53110, 348314, 333888, 17511, 8037
703Catalina Sky Survey (CSS) in Arizona, 36 in MPECs 2018-A79, 2018-A89 & 2018-A91 -- 2018 AH, 2018 AG4, 2018 AA4, 2017 YP4, 2017 YN3, 2017 QL33, 2016 AU8, 2015 DP155, 2013 PX6, 2005 FL4, 96590, 504928, 504025, 475967, 36284, 348314, 338176, 307493, 281365, 225586, 208023, 185853, 177651, 17511, 154347, 137924, 137052, 136923, 11500, 111253, 100926, 6053, 6050, 3122, 1981, 1864
K51Celado Obs. in Italy, 1 in MPEC 2018-A83 -- 2018 AZ3
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-A89 -- 2018 AG4
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2018-A79, 2018-A89 & 2018-A91 -- 2018 AV2, 2018 AG4, 2018 AA4
K88GINOP-KHK in Hungary, 3 in MPECs 2018-A86, 2018-A89 & 2018-A91 -- 2018 AG4, 2018 AD4, 2018 AA4
A17Guidestar Obs. in Germany, 2 in MPECs 2018-A89 & 2018-A91 -- 2018 AG4, 2018 AA4
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-A89 -- 2018 AG4
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2018-A81, 2018-A82, 2018-A83, 2018-A85, 2018-A89, 2018-A90 & 2018-A91 -- 2018 AZ3, 2018 AY3, 2018 AX3, 2018 AW3, 2018 AG4, 2018 AC4, 2018 AA4
C41MASTER-II Kislovodsk in Russia, 1 in MPEC 2018-A79 -- 190208
711McDonald Obs. in Texas, 14 in MPECs 2018-A79, 2018-A81, 2018-A82, 2018-A83, 2018-A84, 2018-A85, 2018-A86, 2018-A87, 2018-A88, 2018-A89 & 2018-A91 -- 2018 AZ3, 2018 AY3, 2018 AX3, 2018 AG4, 2018 AF4, 2018 AE4, 2018 AD4, 2018 AC4, 2018 AB4, 2018 AA4, 2017 VA2, 2017 UY44, 2017 UC5, 2016 AC65
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2018-A79 -- 2017 VX1
G96Mt. Lemmon Survey (MLS) in Arizona, 39 in MPECs 2018-A79, 2018-A81, 2018-A82, 2018-A83, 2018-A84, 2018-A85, 2018-A86, 2018-A87, 2018-A90 & 2018-A91 -- 2018 AZ3, 2018 AY3, 2018 AX3, 2018 AW3, 2018 AE4, 2018 AD4, 2018 AC4, 2018 AB4, 2018 AA4, 2017 YF7, 2017 XH62, 2017 XD62, 2017 UR7, 2017 TC4, 2017 RH15, 2017 QO17, 2017 QJ18, 2015 SY16, 2015 BN509, 2009 QL8, 2007 XP3, 2003 WX87, 88264, 52760, 503293, 496816, 483560, 455659, 450894, 331510, 267221, 265962, 259221, 210012, 20236, 154991, 141079, 136849, 5620
F51Pan-STARRS 1 (PS1) in Hawaii, 23 in MPECs 2018-A79, 2018-A80 & 2018-A88 -- 2018 AF4, 2017 YC8, 2017 VW13, 2017 VK1, 2017 MB1, 2016 GZ215, 2015 VO66, 2004 CK39, 2003 CN17, 1999 SJ10, 52760, 507366, 451397, 426071, 423022, 417816, 386847, 385497, 376729, 323179, 259221, 219527, 138013
K63Pascoli Obs. in Italy, 2 in MPECs 2018-A86 & 2018-A91 -- 2018 AD4, 2018 AA4
L04ROASTERR-1 in Romania, 1 in MPEC 2018-A89 -- 2018 AG4
204Schiaparelli Obs. in Italy, 4 in MPECs 2018-A85, 2018-A86, 2018-A87 & 2018-A91 -- 2018 AE4, 2018 AD4, 2018 AC4, 2018 AA4
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2018-A79, 2018-A81 & 2018-A91 -- 2018 AX3, 2018 AK2, 2018 AA4, 2017 WF13, 2017 UZ4, 2017 SV20, 2017 OP19, 2007 AG
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2018-A79 -- 2018 AV2, 2017 VS14, 2015 DP155, 2015 DE176, 2011 MU, 2010 FL, 2004 TP1, 1999 FP19
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-A79 & 2018-A89 -- 2018 AG4, 2007 AT2
I52Steward Obs. Mt. Lemmon Station in Arizona, 12 in MPECs 2018-A79, 2018-A81, 2018-A82, 2018-A83, 2018-A84, 2018-A85, 2018-A86, 2018-A87, 2018-A89 & 2018-A91 -- 2018 AZ3, 2018 AY3, 2018 AX3, 2018 AN2, 2018 AG4, 2018 AE4, 2018 AD4, 2018 AC4, 2018 AB4, 2018 AA4, 2017 YN6, 2017 YJ7
926Tenagra II Obs. in Arizona, 2 in MPEC 2018-A79 -- 2016 BA39, 2013 AT72
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-A79 -- 2017 YV8, 2012 BB124
T09UH/Tholen NEO Follow-Up Subaru Telescope in Hawaii, 1 in MPEC 2018-A79 -- 2017 XA1
L01Visnjan Obs., 3 in MPECs 2018-A81, 2018-A83 & 2018-A87 -- 2018 AZ3, 2018 AX3, 2018 AE4
718Wiggins Obs. in Utah, 1 in MPEC 2018-A89 -- 2018 AG4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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
2017 YV8JPL Sentry17032082-2117174.504784e-05-5.80-6.100JPL: Computed at 08:18 today Pacific time based on 15 observations spanning 11.069 days (2017-Dec-25.19157 to 2018-Jan-05.260158). Diameter approximately 0.012 km. from weighted mean H=27.34.
2017 VW13JPL Sentry1703R E M O V E DJPL: Risk listing removed at 1557 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 15 January '18

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

2110Generated Traffic Report
1900Grabbed MPEC 2018-A89 - 2018 AG4 - see above
Grabbed MPEC 2018-A90 - 2018 AW3 - see above
Grabbed MPEC 2018-A91 - 2018 AA4 - see above
1834Grabbed MPEC 2018-A82 - 2018 AY3 - see above
Grabbed MPEC 2018-A83 - 2018 AZ3 - see above
Grabbed MPEC 2018-A84 - 2018 AB4 - see above
Grabbed MPEC 2018-A85 - 2018 AC4 - see above
Grabbed MPEC 2018-A86 - 2018 AD4 - see above
Grabbed MPEC 2018-A87 - 2018 AE4 - see above
Grabbed MPEC 2018-A88 - 2018 AF4 - see above
1802Grabbed MPEC 2018-A80 - 1999 SJ10 - see above
Grabbed MPEC 2018-A81 - 2018 AX3 - see above
1703Noted that JPL Sentry has removed 2017 VW13 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 YV8 risk assessment - see above
Grabbed MPEC 2018-A79 - Daily Orbit Update - see above