Contents  on 2 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 2 January '19

Six objects reported inside ten LD

There are six minor planets reported within ten lunar distances (LD) of our home world today. Closest is newly announced risk-listed intruder 2018 YO2, which is outbound from 4.20 to 5.06 LD after passing us at 0.51 LD on December 28th.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.51 LD Dec. 28 2018 YO2 4 m  4.20 to 5.06 LD Dec. 16 - Jan. 8 NEW, intruder, risk - MPEC
3.92 LD Dec. 2 2018 TG6 12 m  9.28 to 9.52 LD Oct. 30 - Jan. 5 NHATS target
6.41 LD Dec. 31 2018 YM2 40 m  8.10 to 9.86 LD Dec. 28 - tomorrow
7.3   LD Jan. 9* 2013 YM2 19 m  9.7 from 10.3 LD today - Jan. 16 EPU +/- 3.75 days*, NHATS target, enters ten LD
7.8   LD Jan. 6* 2018 XO4 30 m  8.6 from 9.0 LD Dec. 30 - Jan. 13 EPU +/- 17 mins.*, NHATS target
9.05 LD Jan. 5 2018 YR2 17 m  9.43 from 9.83 LD yesterday - Jan. 8 NEW - MPEC
* EPU = Earth passage uncertainty

This report was generated at 2010 UTC with four discoveries, all in the active traffic tables (above and below).

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
5.60 LD Jan. 12 2018 YU2 17 m  11.02 from 11.94 LD Jan. 4 - 20 NEW - MPEC
7.5   LD Jan. 10* 2018 YQ2 21 m  11.6 from 12.6 LD Jan. 4 - 15 NEW, EPU +/- 12 mins.*, risk - MPEC



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 2 January '19

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 43 were "one nighters." So far The Tracking News has counted a total of 66 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 2 January '19

Minor Planet Electronic Circulars

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


MPEC 2019-A20 - "18:01 UT" - Comet P/2018 Y2 (Africano)


<< DOU on 2 Jan. '19 >>  MPEC 2019-A19 - "13:05 UT" - Daily Orbit Update


MPEC 2019-A18 - "11:41 UT" - 2018 YQ2


MPEC 2019-A17 - "11:38 UT" - 2018 YO2


MPEC 2019-A16 - "11:35 UT" - 2018 YW2


MPEC 2019-A15 - "11:32 UT" - 2018 YV2


MPEC 2019-A14 - "11:29 UT" - 2018 YU2


MPEC 2019-A13 - "11:26 UT" - 2018 YT2


MPEC 2019-A12 - "11:23 UT" - 2018 YS2


MPEC 2019-A11 - "11:19 UT" - 2018 YR2


MPEC 2019-A10 - "11:16 UT" - 2018 YP2


MPEC 2019-A09 - "03:48 UT" - 2014 QC442


MPEC 2019-A08 - "03:46 UT" - 2014 OD394


MPEC 2019-A07 - "02:19 UT" - 2016 RN1

Observers  on 2 January '19

A total of 27 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPEC 2019-A19 -- 2018 NU3, 2018 MK8, 2018 MJ7, 2018 KT, 2018 FC1, 2016 LM11, 2014 UV, 162980
I47Auger Obs. in Argentina, 1 in MPEC 2019-A19 -- 2017 YH
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-A20 -- P/2018 Y2
160Castelmartini Obs. in Italy, 13 in MPECs 2019-A11 & 2019-A19 -- 2018 YR2, 2011 OL5, 2007 YQ56, 345722, 325395, 18109, 141498, 136793, 4401, 3200, 2061, 1943, 1916
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2019-A10, 2019-A11, 2019-A12, 2019-A18 & 2019-A19 -- 2018 YS2, 2018 YR2, 2018 YQ2, 2018 YP2, 2018 QP1, 2011 SJ68
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2019-A20 -- P/2018 Y2
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-A15 -- 2018 YV2
K88GINOP-KHK in Hungary, 5 in MPECs 2019-A11, 2019-A13, 2019-A14, 2019-A15 & 2019-A20 -- 2018 YV2, 2018 YU2, 2018 YT2, 2018 YR2, P/2018 Y2
J95Great Shefford Obs. in England, 8 in MPECs 2019-A10, 2019-A11, 2019-A12, 2019-A13, 2019-A14, 2019-A15, 2019-A17 & 2019-A18 -- 2018 YV2, 2018 YU2, 2018 YT2, 2018 YS2, 2018 YR2, 2018 YQ2, 2018 YP2, 2018 YO2
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-A20 -- P/2018 Y2
I89'Steven M. Tilley in Louisiana via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2019-A19 -- 2018 XV
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPECs 2019-A16 & 2019-A20 -- 2018 YW2, P/2018 Y2
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2019-A10, 2019-A11, 2019-A12, 2019-A13, 2019-A14, 2019-A15, 2019-A18 & 2019-A20 -- 2018 YV2, 2018 YU2, 2018 YT2, 2018 YS2, 2018 YR2, 2018 YQ2, 2018 YP2, P/2018 Y2
Z80Northolt Branch Obs. in England, 2 in MPECs 2019-A11 & 2019-A20 -- 2018 YR2, P/2018 Y2
I41Palomar Transient Factory in southern California, 1 in MPEC 2019-A17 -- 2018 YO2
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2019-A08, 2019-A09, 2019-A11, 2019-A13, 2019-A14, 2019-A15, 2019-A16, 2019-A17, 2019-A18 & 2019-A19 -- 2018 YW2, 2018 YV2, 2018 YU2, 2018 YT2, 2018 YR2, 2018 YQ2, 2018 YO2, 2018 XB20, 2018 UZ, 2018 TO6, 2014 QC442, 2014 OD394
B49Paus Obs. in Spain, 3 in MPECs 2019-A14, 2019-A15 & 2019-A20 -- 2018 YV2, 2018 YU2, P/2018 Y2
D29Purple Mtn. Obs. Xuyi Station in China, 4 in MPECs 2019-A19 & 2019-A20 -- P/2018 Y2, 2005 YY36, 381677, 333707
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2019-A11, 2019-A13, 2019-A15 & 2019-A18 -- 2018 YV2, 2018 YT2, 2018 YR2, 2018 YQ2
C95SATINO-1 in France, 1 in MPEC 2019-A19 -- 5324
204Schiaparelli Obs. in Italy, 5 in MPECs 2019-A10, 2019-A11, 2019-A13, 2019-A14 & 2019-A15 -- 2018 YV2, 2018 YU2, 2018 YT2, 2018 YR2, 2018 YP2
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-A20 -- P/2018 Y2
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2019-A12 & 2019-A18 -- 2018 YS2, 2018 YQ2
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2019-A07 & 2019-A19 -- 2018 RJ7, 2016 RN1
L01Visnjan Obs., 10 in MPECs 2019-A10, 2019-A11, 2019-A12, 2019-A13, 2019-A14, 2019-A15, 2019-A16, 2019-A17, 2019-A18 & 2019-A20 -- 2018 YW2, 2018 YV2, 2018 YU2, 2018 YT2, 2018 YS2, 2018 YR2, 2018 YQ2, 2018 YP2, 2018 YO2, P/2018 Y2
718Wiggins Obs. in Utah, 1 in MPEC 2019-A19 -- 2018 XR
C51WISE in Earth polar orbit, 1 in MPEC 2019-A19 -- 244670
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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.
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 YW2JPL Sentry18002050-208131.3511e-06-5.48-5.920JPL: Computed at 04:58 today Pacific time based on 10 observations spanning 1.5753 days (2018-Dec-31.52399 to 2019-Jan-02.099258). Diameter approximately 0.055 km. from weighted mean H=23.95.
NEODyS18002050-209366.09e-06-4.70-4.850NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2018-12-31.525 to 2019-01-02.100."
2018 YQ2JPL Sentry18002064-2116148.650795e-07-6.85-7.230JPL: Computed at 05:10 today Pacific time based on 22 observations spanning 1.8180 days (2018-Dec-31.16339 to 2019-Jan-01.98144). Diameter approximately 0.021 km. from weighted mean H=26.07.
NEODyS18002064-2116157.01e-07-6.96-7.520NEODyS: "Based on 23 optical observations (of which 1 are rejected as outliers) from 2018-12-31.159 to 2019-01-01.982."
2018 YO2JPL Sentry18002066-208721.9151e-07-9.25-9.280JPL: Computed at 05:03 today Pacific time based on 14 observations spanning 3.7459 days (2018-Dec-29.446667 to 2019-Jan-02.192586). Diameter approximately 0.004 km. from weighted mean H=29.81.
NEODyS18002065-2104141.19e-06-8.55-9.070NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2018-12-29.447 to 2019-01-02.193."

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 2 January '19

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

2010Generated Traffic Report
1830Grabbed MPEC 2019-A20 - Comet P/2018 Y2 (Africano) - see above
1800Noted that JPL Sentry has posted 2018 YO2 as an impact risk - see above
Noted that NEODyS has posted 2018 YO2 as an impact risk - see above
Noted that JPL Sentry has posted 2018 YQ2 as an impact risk - see above
Noted that NEODyS has posted 2018 YQ2 as an impact risk - see above
Noted that JPL Sentry has posted 2018 YW2 as an impact risk - see above
Noted that NEODyS has posted 2018 YW2 as an impact risk - see above
Grabbed MPEC 2019-A10 - 2018 YP2 - see above
Grabbed MPEC 2019-A11 - 2018 YR2 - see above
Grabbed MPEC 2019-A12 - 2018 YS2 - see above
Grabbed MPEC 2019-A13 - 2018 YT2 - see above
Grabbed MPEC 2019-A14 - 2018 YU2 - see above
Grabbed MPEC 2019-A15 - 2018 YV2 - see above
Grabbed MPEC 2019-A16 - 2018 YW2 - see above
Grabbed MPEC 2019-A17 - 2018 YO2 - see above
Grabbed MPEC 2019-A18 - 2018 YQ2 - see above
Grabbed MPEC 2019-A19 - Daily Orbit Update - see above
0431Grabbed MPEC 2019-A07 - 2016 RN1 - see above
Grabbed MPEC 2019-A08 - 2014 OD394 - see above
Grabbed MPEC 2019-A09 - 2014 QC442 - see above