Contents  on 11 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 11 January '19

Thirteen objects reported inside ten LD

Thirteen Solar-System small bodies are known to be less than ten lunar distances (LD) from Earth today. Closest is outbound 2019 AD, which moves away from 3.10 to 3.62 LD.

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
0.04 LD Jan. 8 2019 AS5 1 m  6.87 to 9.17 LD Jan. 3 - 12 intruder, NHATS target, risk
2.57 LD Jan. 14 2019 AU6 17 m  5.30 from 7.12 LD Jan. 9 - 19 NHATS target, risk - DOU
2.99 LD yesterday 2019 AD 10 m  3.10 to 3.62 LD Jan. 2 - 18 NHATS target
3.46 LD Jan. 7 2019 AR7 15 m  4.64 to 5.30 LD Dec. 28 - Jan. 17 NHATS target
3.92 LD Jan. 15 2019 AG7 29 m  7.18 from 8.50 LD Jan. 9 - 22 NHATS target, risk - DOU
4.87 LD tomorrow 2019 AK3 13 m  5.16 from 6.37 LD Jan. 9 - 16
5.60 LD tomorrow 2018 YU2 18 m  5.60 from 5.72 LD Jan. 4 - 20 NHATS target
7.47 LD yesterday 2018 YQ2 20 m  7.57 to 7.88 LD Jan. 4 - 15 NHATS target, risk
7.60 LD Jan. 13 2019 AR2 47 m  7.80 from 8.12 LD Jan. 7 - 19 NHATS target - DOU
7.76 LD yesterday 2013 YM2 22 m  7.81 to 7.98 LD Jan. 3 - 16 NHATS target - DOU
7.77 LD Jan. 5 2019 AU 16 m  8.61 to 8.95 LD Dec. 27 - Jan. 14 NHATS target - DOU
7.8   LD Jan. 6* 2018 XO4 30 m  8.6 to 9.0 LD Dec. 30 - Jan. 13 EPU +/- 17 mins.*, NHATS target
8.08 LD Jan. 15 2019 AT6 10 m  8.85 from 9.38 LD yesterday - Jan. 20 NHATS target - DOU
* EPU = Earth passage uncertainty

This report was generated at 1940 UTC with the discoveries of approaching objects 2019 AR8 (MPEC) and 2019 AM8 (MPEC), and with follow-up in today's DOU MPEC for six objects in the above active traffic table and for four departed objects: 2019 AX5, 2018 YK2, and risk-listed objects 2019 AQ2 and intruder 2019 AW2.

Approaching - sorted by 10-LD bubble entry date
8.62 LD Jan. 15 2019 AM8 14 m  12.44 from 14.32 LD Jan. 13 - 17 NEW - MPEC
7.5   LD Jan. 19* 2019 AB5 26 m  14.1 from 15.4 LD Jan. 15 - 24 EPU +/- 21 mins.*
9.69 LD Jan. 16 2019 AR8 26 m  13.72 from 15.22 LD Jan. 15 - 18 NEW - 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 11 January '19

The MPC's NEO Confirmation Page has 106 listings

When last checked at 2300 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 106 objects listed. Of these, 41 were "one nighters." So far The Tracking News has counted a total of 130 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 11 January '19

Minor Planet Electronic Circulars

As of last check at 2300 UTC, there have been twelve MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-A179 - "16:36 UT" - 2019 AN8


MPEC 2019-A178 - "16:31 UT" - 2019 AS8


MPEC 2019-A177 - "16:26 UT" - 2019 AR8


MPEC 2019-A176 - "16:21 UT" - 2019 AQ8


MPEC 2019-A175 - "16:17 UT" - 2019 AP8


MPEC 2019-A174 - "16:13 UT" - 2019 AO8


MPEC 2019-A173 - "16:08 UT" - 2019 AM8


MPEC 2019-A172 - "16:02 UT" - 2019 AL8


MPEC 2019-A171 - "15:57 UT" - 2019 AK8


MPEC 2019-A170 - "15:52 UT" - 2019 AJ8


<< DOU on 11 Jan. '19 >>  MPEC 2019-A169 - "13:07 UT" - Daily Orbit Update


MPEC 2019-A168 - "12:16 UT" - 2019 AW7

Observers  on 11 January '19

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2019-A169, 2019-A172, 2019-A174 & 2019-A175 -- 2019 AP8, 2019 AO8, 2019 AL8, 2018 SX2, 2014 YM44, 357028
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2019-A169 -- 523811, 2340
T08ATLAS Mauna Loa in Hawaii, 2 in MPEC 2019-A169 -- 2018 XV, 2009 SV17
160Castelmartini Obs. in Italy, 6 in MPEC 2019-A169 -- 2012 MM11, 2009 SV17, 523587, 141053, 138937, 2061
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2019-A168 & 2019-A169 -- 2019 AW7, 2018 YK2, 2018 YJ2, 2018 VZ9, 2016 CA136, 2015 YE21, 2013 YM2, 2007 NL1, 2005 YY36, 2004 XP14
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 4 in MPECs 2019-A170, 2019-A171, 2019-A172 & 2019-A173 -- 2019 AM8, 2019 AL8, 2019 AK8, 2019 AJ8
K51Celado Obs. in Italy, 2 in MPECs 2019-A174 & 2019-A177 -- 2019 AR8, 2019 AO8
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2019-A169, 2019-A173 & 2019-A176 -- 2019 AQ8, 2019 AM8, 2015 BR515
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 1 in MPEC 2019-A177 -- 2019 AR8
203GiaGa Obs. in Italy, 1 in MPEC 2019-A177 -- 2019 AR8
J95Great Shefford Obs. in England, 4 in MPECs 2019-A168, 2019-A174, 2019-A177 & 2019-A179 -- 2019 AW7, 2019 AR8, 2019 AO8, 2019 AN8
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-A168 -- 2019 AW7
585Kiev Comet Station in Ukraine, 2 in MPEC 2019-A169 -- 2018 UF, 2018 UA1
K38M57 Obs. in Italy, 2 in MPEC 2019-A169 -- 2019 AR2, 2018 VB9
C94MASTER-II Tunka in Russia, 1 in MPEC 2019-A169 -- 308127
568^R. Wainscoat on Mauna Kea in Hawaii, 4 in MPECs 2019-A169, 2019-A174, 2019-A176 & 2019-A177 -- 2019 AV7, 2019 AR8, 2019 AQ8, 2019 AO8
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2019-A170, 2019-A172 & 2019-A173 -- 2019 AM8, 2019 AL8, 2019 AJ8
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-A169 -- 2019 AD5
I41Palomar Transient Factory (PTF) in southern California, 12 in MPECs 2019-A168 & 2019-A169 -- 2019 AW7, 2014 XR6, 2013 VD13, 2009 SV17, 523803, 419829, 217628, 170891, 153591, 5797, 3103, 719
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2019-A169, 2019-A171, 2019-A174, 2019-A175, 2019-A176, 2019-A177, 2019-A178 & 2019-A179 -- 2019 AU3, 2019 AS8, 2019 AR8, 2019 AQ8, 2019 AQ7, 2019 AP8, 2019 AO8, 2019 AN8, 2019 AN7, 2019 AK8, 2019 AG7, 2018 RB8, 2011 AA37, 382825, 140928
C95SATINO-1 in France, 1 in MPEC 2019-A169 -- 52387
204Schiaparelli Obs. in Italy, 4 in MPECs 2019-A174, 2019-A176, 2019-A177 & 2019-A178 -- 2019 AS8, 2019 AR8, 2019 AQ8, 2019 AO8
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-A169 -- 2019 AV2
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-A169 -- 2019 AV2
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-A168 -- 2019 AW7
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2019-A169 & 2019-A175 -- 2019 AV2, 2019 AU3, 2019 AU, 2019 AT3, 2019 AQ2, 2019 AP8, 2018 YE2, 302169
291Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2019-A169 -- 2019 AU6, 2019 AQ6, 2019 AN5, 2019 AM3, 2019 AG7, 2019 AC3, 2018 YF2, 2018 XG5, 2018 XB4, 2013 BC70
I52Steward Obs. Mt. Lemmon Station in Arizona, 14 in MPECs 2019-A168, 2019-A169, 2019-A170, 2019-A171, 2019-A172, 2019-A173, 2019-A176, 2019-A178 & 2019-A179 -- 2019 AX5, 2019 AW7, 2019 AU2, 2019 AT6, 2019 AS8, 2019 AQ8, 2019 AQ2, 2019 AP6, 2019 AN8, 2019 AM8, 2019 AL8, 2019 AK8, 2019 AJ8, 2018 XG5
381Tokyo-Kiso Obs. in Japan, 1 in MPEC 2019-A168 -- 2019 AW7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2019-A169 -- 2019 AW2, 2019 AC3, 2018 WW2
L01Visnjan Obs., 4 in MPECs 2019-A168, 2019-A174, 2019-A177 & 2019-A178 -- 2019 AW7, 2019 AS8, 2019 AR8, 2019 AO8
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 January '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2300 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
2019 AO8JPL Sentry18302067-206713.524e-08-7.67-7.670JPL: Computed at 09:27 today Pacific time based on 21 observations spanning 1.7200 days (2019-Jan-09.3676 to 2019-Jan-11.08762). Diameter approximately 0.025 km. from weighted mean H=25.65.
2019 AG7JPL Sentry17002064-211695.59773e-06-5.55-5.610JPL: Computed at 08:17 today Pacific time based on 36 observations spanning 10.714 days (2018-Dec-31.614374 to 2019-Jan-11.32861). Diameter approximately 0.029 km. from weighted mean H=25.32.
2019 AU6JPL Sentry17002064-2103130.00016029133-4.62-4.840JPL: Computed at 08:09 today Pacific time based on 24 observations spanning 8.7515 days (2019-Jan-02.571913 to 2019-Jan-11.32341). Diameter approximately 0.017 km. from weighted mean H=26.56.
2019 AC3JPL Sentry17002091-2118140.0004268324253-4.84-4.860JPL: Computed at 07:51 today Pacific time based on 22 observations spanning 7.7509 days (2019-Jan-03.58822 to 2019-Jan-11.33913). Diameter approximately 0.012 km. from weighted mean H=27.25.
2019 AW2JPL Sentry17002072-210841.428035e-06-5.92-6.090JPL: Computed at 07:46 today Pacific time based on 30 observations spanning 5.5212 days (2019-Jan-03.47489 to 2019-Jan-08.996108). Diameter approximately 0.031 km. from weighted mean H=25.21.
2019 AQ2JPL Sentry17002090-211479.113315e-07-6.73-6.970JPL: Computed at 07:50 today Pacific time based on 52 observations spanning 7.9584 days (2019-Jan-03.32957 to 2019-Jan-11.28794). Diameter approximately 0.026 km. from weighted mean H=25.60.
2018 XG5JPL Sentry17002083-208311.176e-07-4.70-4.700JPL: Computed at 07:39 today Pacific time based on 57 observations spanning 28.856 days (2018-Dec-13.39431 to 2019-Jan-11.25018). Diameter approximately 0.310 km. from weighted mean H=20.22.
2018 XB4JPL Sentry17002052-2118428.47790543e-05-3.87-4.000JPL: Computed at 07:48 today Pacific time based on 53 observations spanning 28.902 days (2018-Dec-13.34358 to 2019-Jan-11.24526). Diameter approximately 0.055 km. from weighted mean H=23.97.
2016 AZ193JPL Sentry17002019-21144972.1974198e-06-6.30-7.220JPL: Computed at 14:28 April 6th of 2017 Pacific time based on 9 observations spanning .15930 days (2016-Jan-03.25638 to 2016-Jan-03.41568). Diameter approximately 0.016 km. from weighted mean H=26.62.
2008 EL68JPL Sentry17002019-21136063.24185673e-05-5.39-6.210JPL: Computed at 11:57 April 9th of 2017 Pacific time based on 8 observations spanning .07124 days (2008-Mar-06.40768 to 2008-Mar-06.47892). Diameter approximately 0.009 km. from weighted mean H=27.92.

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 11 January '19

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

1940Generated Traffic Report
1830Noted that JPL Sentry has posted 2019 AO8 as an impact risk - see above
1700Noted that JPL Sentry has updated its 2008 EL68 risk assessment - see above
Noted that JPL Sentry has updated its 2016 AZ193 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XB4 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XG5 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AC3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AG7 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AQ2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AU6 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AW2 risk assessment - see above
Grabbed MPEC 2019-A168 - 2019 AW7 - see above
Grabbed MPEC 2019-A169 - Daily Orbit Update - see above
Grabbed MPEC 2019-A170 - 2019 AJ8 - see above
Grabbed MPEC 2019-A171 - 2019 AK8 - see above
Grabbed MPEC 2019-A172 - 2019 AL8 - see above
Grabbed MPEC 2019-A173 - 2019 AM8 - see above
Grabbed MPEC 2019-A174 - 2019 AO8 - see above
Grabbed MPEC 2019-A175 - 2019 AP8 - see above
Grabbed MPEC 2019-A176 - 2019 AQ8 - see above
Grabbed MPEC 2019-A177 - 2019 AR8 - see above
Grabbed MPEC 2019-A178 - 2019 AS8 - see above
Grabbed MPEC 2019-A179 - 2019 AN8 - see above