Contents  on 1 January '19

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 1 January '19

Three objects reported inside ten LD

Three visitors are reported inside ten lunar distances (LD) of our planet today. The nearest of these, 2018 YM2, heads away from 6.85 to 8.10 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
3.92 LD Dec. 2 2018 TG6 12 m  9.05 to 9.28 LD Oct. 30 - Jan. 5 NHATS target
6.41 LD Dec. 31 2018 YM2 40 m  6.85 to 8.10 LD Dec. 28 - Jan. 3 DOU
7.8   LD Jan. 6* 2018 XO4 30 m  9.0 from 9.4 LD Dec. 30 - Jan. 13 EPU +/- 17 mins.*, NHATS target
7.3   LD Jan. 9* 2013 YM2 19 m  10.3 from 11.0 LD tomorrow - Jan. 16 EPU +/- 3.75 days*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1842 UTC with follow-up in today's DOU MPEC for outbound 2018 YM2 and departed 2018 XS4.

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 1 January '19

The MPC's NEO Confirmation Page has 26 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 26 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 27 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 1 January '19

Minor Planet Electronic Circulars

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

MPEC 2019-A06 - "20:46 UT" - 2016 SN2

MPEC 2019-A05 - "20:44 UT" - 2005 VS

MPEC 2019-A04 - "14:29 UT" - 2014 SU1

MPEC 2019-A03 - "14:24 UT" - 2013 TB6

<< DOU on 1 Jan. '19 >>  MPEC 2019-A02 - "13:05 UT" - Daily Orbit Update

MPEC 2019-A01 - "03:00 UT" - 2015 WC13

Observers  on 1 January '19

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2019-A02 -- 2018 XY2, 2018 VK6, 2018 VC4, 2018 UQ2, 2018 TN1, 2018 OG, 2018 FC1, 2017 MU8, 2011 AW55, 363163
T05ATLAS Haleakala in Hawaii, 5 in MPEC 2019-A02 -- 2018 WR1, 2018 TC3, 2009 SV17, 2007 YU56, 2002 XQ90
160Castelmartini Obs. in Italy, 2 in MPEC 2019-A02 -- 2018 WR1, 99799
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 21 in MPECs 2019-A02 & 2019-A05 -- 2018 YE2, 2018 XV5, 2018 XS4, 2018 XK5, 2018 XH5, 2018 XF5, 2018 XB1, 2018 WY2, 2018 VQ3, 2018 TW5, 2018 TT, 2018 PX19, 2017 AV3, 2016 VG2, 2014 XX31, 2010 CT, 2009 WR25, 2007 CA27, 2005 VS, 2003 OQ13, 2002 JD9
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-A02 -- 2018 XN
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-A02 -- 2018 XR
I89'Steven M. Tilley in Louisiana via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2019-A02 -- 2018 XR
I89{program code "{" (31) via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2019-A02 -- 433
695Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2019-A02 -- 2018 XC2
950.EURONEAR via La Palma in the Canary Islands, 1 in MPEC 2019-A02 -- 192642
108Montelupo Obs. in Italy, 3 in MPEC 2019-A02 -- 2007 YQ56, 418849, 1943
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-A02 -- 2018 XU2
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-A02 -- 2018 YM2
I41Palomar Transient Factory (PTF) in southern California, 3 in MPEC 2019-A02 -- 2018 XV, 5828, 1864
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2019-A01, 2019-A02 & 2019-A06 -- 2016 SN2, 2016 OP5, 2015 XT129, 2015 WC13, 523811, 424482, 141498
619Sabadell Obs. in Spain, 1 in MPEC 2019-A02 -- 454177
233San Vito Obs. in Italy, 2 in MPEC 2019-A02 -- 18109, 2061
C95SATINO-1 in France, 1 in MPEC 2019-A02 -- 5131
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2019-A03 & 2019-A04 -- 2014 SU1, 2013 TB6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 January '19

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 and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2018 YZ1NEODyS1730211811.16e-11-7.95-7.95-NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2018-12-20.633 to 2018-12-31.414."
2018 XG5NEODyS1730208312.03e-07-4.50-4.50NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2018-12-13.395 to 2018-12-31.184."
2018 XB4NEODyS17302052-2118986.96e-05-3.95-4.31-NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2018-12-13.344 to 2018-12-31.146."

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 1 January '19

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

2100Grabbed MPEC 2019-A05 - 2005 VS - see above
Grabbed MPEC 2019-A06 - 2016 SN2 - see above
1842Generated Traffic Report
1730Noted that NEODyS has updated its 2018 XB4 risk assessment - see above
Noted that NEODyS has updated its 2018 XG5 risk assessment - see above
Noted that NEODyS has updated its 2018 YZ1 risk assessment - see above
Grabbed MPEC 2019-A02 - Daily Orbit Update - see above
Grabbed MPEC 2019-A03 - 2013 TB6 - see above
Grabbed MPEC 2019-A04 - 2014 SU1 - see above
0505Grabbed MPEC 2019-A01 - 2015 WC13 - see above