Contents  on 12 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 12 January '19

Fifteen objects reported inside ten LD

Bulletin - 2343 UTC:  One new discovery of a close passer has been announced.

Earth passageI D~Size~Inside ten LDNotes
7.63 LD at 0942 UTC Jan. 162019 AU915 m Jan. 10 - 22MPEC


There are fifteen visitors reported inside ten lunar distances (LD) of our home world today. Nearest is newly announced intruder 2019 AE9, which came its closest this time around, passing us at 0.26 LD

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 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  9.17 to 11.48 LD Jan. 3 - 12 intruder, NHATS target, exits ten LD, risk
0.26 LD today 2019 AE9 13 m  0.26 LD Jan. 10 - 14 NEW, intruder today, Earth closest at 1108 UTC,
Moon closest 1.21 LD at 1154 UTC - MPEC
2.57 LD Jan. 14 2019 AU6 17 m  3.68 from 5.30 LD Jan. 9 - 19 NHATS target, risk - DOU
2.99 LD Jan. 10 2019 AD 10 m  3.62 to 4.45 LD Jan. 2 - 18 NHATS target
3.46 LD Jan. 7 2019 AR7 15 m  5.30 to 6.04 LD Dec. 28 - Jan. 17 NHATS target - DOU
3.92 LD Jan. 15 2019 AG7 29 m  5.96 from 7.18 LD Jan. 9 - 22 NHATS target, risk - DOU
4.13 LD today 2019 AC9 24 m  4.13 LD Jan. 8 - 16 NEW, Earth closest at 1930 UTC - MPEC
4.87 LD today 2019 AK3 13 m  4.87 LD Jan. 9 - 16 Earth closest at 1702 UTC - DOU
5.60 LD today 2018 YU2 18 m  5.60 LD Jan. 4 - 20 NHATS target, Earth closest at 0411 UTC
7.47 LD Jan. 10 2018 YQ2 20 m  7.88 to 8.38 LD Jan. 4 - 15 NHATS target, risk
7.60 LD tomorrow 2019 AR2 47 m  7.63 from 7.80 LD Jan. 7 - 19 NHATS target - DOU
7.76 LD Jan. 10 2013 YM2 22 m  7.98 to 8.25 LD Jan. 3 - 16 NHATS target
7.77 LD Jan. 5 2019 AU 16 m  8.95 to 9.34 LD Dec. 27 - Jan. 14 NHATS target - DOU
7.8   LD Jan. 6* 2018 XO4 30 m  9.0 to 9.5 LD Dec. 30 - tomorrow EPU +/- 17 mins.*, NHATS target
8.08 LD Jan. 15 2019 AT6 10 m  8.44 from 8.85 LD Jan. 10 - 20 NHATS target
* EPU = Earth passage uncertainty

This report was generated at 2257 UTC with the discoveries of passing intruder 2019 AE9 (MPEC) and outbound 2019 AC9 (MPEC), and with follow-up in today's DOU MPEC for departed risk-listed 2019 AQ2 and for eight objects in the above and below active traffic tables.

Approaching - sorted by 10-LD bubble entry date
8.62 LD Jan. 15 2019 AM8 14 m  10.81 from 12.44 LD tomorrow - Jan. 17 NHATS target
7.46 LD Jan. 19 2019 AB5 27 m  12.79 from 14.04 LD Jan. 15 - 24 DOU
9.69 LD Jan. 16 2019 AR8 26 m  12.38 from 13.72 LD Jan. 15 - 18 NHATS target - DOU



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 12 January '19

The MPC's NEO Confirmation Page has 88 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 88 objects listed. Of these, 22 were "one nighters." The Tracking News counted a total of 123 listings on the NEOCP on this day.

New MPECs  on 12 January '19

Minor Planet Electronic Circulars

There were 25 MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-A204 - "23:58 UT" - 2017 SR32


MPEC 2019-A203 - "23:55 UT" - 2017 SV20


MPEC 2019-A202 - "23:44 UT" - 2017 XK61


MPEC 2019-A201 - "23:42 UT" - 2017 XB2


MPEC 2019-A200 - "23:39 UT" - 2017 WN28


MPEC 2019-A199 - "23:36 UT" - 2017 VV14


MPEC 2019-A198 - "23:34 UT" - 2017 UA8


MPEC 2019-A197 - "23:29 UT" - 2019 AV9


MPEC 2019-A196 - "23:23 UT" - 2019 AU9


MPEC 2019-A195 - "23:19 UT" - 2019 AT9


MPEC 2019-A194 - "23:15 UT" - 2019 AS9


MPEC 2019-A193 - "23:09 UT" - 2019 AR9


MPEC 2019-A192 - "23:04 UT" - 2019 AQ9


MPEC 2019-A191 - "22:59 UT" - 2019 AP9


MPEC 2019-A190 - "22:50 UT" - 2006 CU


MPEC 2019-A189 - "21:06 UT" - 2019 AE9


<< DOU on 12 Jan. '19 >>  MPEC 2019-A188 - "13:06 UT" - Daily Orbit Update


MPEC 2019-A187 - "04:26 UT" - 2018 FO5


MPEC 2019-A186 - "02:01 UT" - 2019 AC9


MPEC 2019-A185 - "01:57 UT" - 2019 AD9


MPEC 2019-A184 - "01:54 UT" - 2019 AB9


MPEC 2019-A183 - "01:51 UT" - 2019 AA9


MPEC 2019-A182 - "01:47 UT" - 2019 AZ8


MPEC 2019-A181 - "01:44 UT" - 2019 AY8


MPEC 2019-A180 - "01:39 UT" - 2019 AX8

Observers  on 12 January '19

A total of 40 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2019-A180, 2019-A182, 2019-A183, 2019-A184, 2019-A195 & 2019-A197 -- 2019 AZ8, 2019 AX8, 2019 AV9, 2019 AT9, 2019 AB9, 2019 AA9
T05ATLAS Haleakala in Hawaii, 5 in MPECs 2019-A188, 2019-A189 & 2019-A190 -- 2019 AR7, 2019 AG7, 2019 AE9, 2007 YU56, 2006 CU
T08ATLAS Mauna Loa in Hawaii, 9 in MPECs 2019-A183, 2019-A188 & 2019-A189 -- 2019 AW7, 2019 AM3, 2019 AE9, 2019 AA9, 2018 VZ9, 2018 VW6, 2018 TC3, 2016 AZ8, 2013 VD13
703Catalina Sky Survey in Arizona, 1 in MPEC 2019-A190 -- 2006 CU
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 2 in MPECs 2019-A191 & 2019-A192 -- 2019 AQ9, 2019 AP9
K51Celado Obs. in Italy, 1 in MPEC 2019-A183 -- 2019 AA9
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2019-A181, 2019-A191, 2019-A193 & 2019-A194 -- 2019 AY8, 2019 AS9, 2019 AR9, 2019 AP9
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2019-A186 -- 2019 AC9
L29Drebach-South Obs., 2 in MPECs 2019-A183 & 2019-A190 -- 2019 AA9, 2006 CU
L05Dridri Obs. in Italy, 1 in MPEC 2019-A188 -- 523604
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2019-A182 & 2019-A183 -- 2019 AZ8, 2019 AA9
734Farpoint Obs. in Kansas, 1 in MPEC 2019-A181 -- 2019 AY8
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-A186 -- 2019 AC9
203GiaGa Obs. in Italy, 1 in MPEC 2019-A183 -- 2019 AA9
K88GINOP-KHK in Hungary, 1 in MPEC 2019-A183 -- 2019 AA9
J95Great Shefford Obs. in England, 1 in MPEC 2019-A183 -- 2019 AA9
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2019-A194 -- 2019 AS9
T03LCO Haleakala Clamshell#3 in Hawaii, 1 in MPEC 2019-A188 -- 2016 AZ8
Z21LCO Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2019-A189 -- 2019 AE9
K38M57 Obs. in Italy, 2 in MPECs 2019-A183 & 2019-A188 -- 2019 AU, 2019 AA9
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-A188 -- 1620
C94MASTER-II Tunka in Russia, 1 in MPEC 2019-A188 -- 308127
568^R. Wainscoat on Mauna Kea in Hawaii, 7 in MPECs 2019-A180, 2019-A184, 2019-A191, 2019-A194, 2019-A195, 2019-A196 & 2019-A197 -- 2019 AX8, 2019 AV9, 2019 AU9, 2019 AT9, 2019 AS9, 2019 AP9, 2019 AB9
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-A189 -- 2019 AE9
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2019-A182, 2019-A190, 2019-A192 & 2019-A196 -- 2019 AZ8, 2019 AU9, 2019 AQ9, 2006 CU
I41Palomar Transient Factory (PTF) in southern California, 6 in MPECs 2019-A186 & 2019-A188 -- 2019 AW7, 2019 AC9, 2006 OH15, 170891, 12923, 2061
F51Pan-STARRS 1 (PS1) in Hawaii, 30 in MPECs 2019-A180, 2019-A181, 2019-A184, 2019-A185, 2019-A187, 2019-A188, 2019-A190, 2019-A191, 2019-A193, 2019-A194, 2019-A195, 2019-A196, 2019-A197, 2019-A198, 2019-A199, 2019-A200, 2019-A201, 2019-A202, 2019-A203 & 2019-A204 -- 2019 AY8, 2019 AY3, 2019 AX8, 2019 AV9, 2019 AU9, 2019 AT9, 2019 AS9, 2019 AR9, 2019 AR8, 2019 AQ8, 2019 AP9, 2019 AO7, 2019 AD9, 2019 AB9, 2018 YS, 2018 XF3, 2018 FO5, 2017 XK61, 2017 XB2, 2017 WN28, 2017 VV14, 2017 UA8, 2017 SV20, 2017 SR32, 2016 TL18, 2015 YU7, 2006 CU, 329390, 138175, 2340
K63Pascoli Obs. in Italy, 1 in MPEC 2019-A183 -- 2019 AA9
B49Paus Obs. in Spain, 1 in MPEC 2019-A183 -- 2019 AA9
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2019-A183, 2019-A186 & 2019-A190 -- 2019 AC9, 2019 AA9, 2006 CU
C95SATINO-1 in France, 1 in MPEC 2019-A188 -- 55532
204Schiaparelli Obs. in Italy, 1 in MPEC 2019-A183 -- 2019 AA9
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-A183 -- 2019 AA9
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2019-A188 -- 2019 AX4, 2019 AQ4, 2019 AP3, 2019 AC, 2018 YZ1, 2018 XV5, 2003 AO4
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2019-A181, 2019-A188, 2019-A191, 2019-A193, 2019-A194, 2019-A195 & 2019-A197 -- 2019 AY8, 2019 AW4, 2019 AV9, 2019 AU2, 2019 AT9, 2019 AS9, 2019 AS2, 2019 AR9, 2019 AP9, 2019 AN5, 2019 AC3, 2018 XG5, 2018 OB1, 2007 AA9
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2019-A183 & 2019-A188 -- 2019 AR2, 2019 AA9
I52Steward Obs. Mt. Lemmon Station in Arizona, 20 in MPECs 2019-A181, 2019-A183, 2019-A185, 2019-A186, 2019-A188, 2019-A190, 2019-A192, 2019-A196 & 2019-A197 -- 2019 AY8, 2019 AV9, 2019 AV4, 2019 AU9, 2019 AQ9, 2019 AQ2, 2019 AK7, 2019 AK3, 2019 AJ3, 2019 AD9, 2019 AC9, 2019 AB5, 2019 AA9, 2018 VV1, 2018 VS9, 2018 TL2, 2017 KE35, 2017 BL3, 2016 VS5, 2006 CU
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPECs 2019-A188 & 2019-A189 -- 2019 AU6, 2019 AQ2, 2019 AO8, 2019 AG7, 2019 AE9, 2019 AC3
K41Vegaquattro Obs. in Italy, 1 in MPEC 2019-A183 -- 2019 AA9
L01Visnjan Obs., 4 in MPECs 2019-A181, 2019-A183, 2019-A185 & 2019-A186 -- 2019 AY8, 2019 AD9, 2019 AC9, 2019 AA9
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 January '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2354 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 AZ8NEODyS2033210917.08e-10-9.87-9.870NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2019-01-09.379 to 2019-01-11.340."
2019 AO8NEODyS2033209711.46e-09-9.23-9.230NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2019-01-09.368 to 2019-01-12.466."
JPL Sentry17352067-206711.506e-08-8.05-8.050JPL: Computed at 07:58 today Pacific time based on 24 observations spanning 3.0978 days (2019-Jan-09.3676 to 2019-Jan-12.465423). Diameter approximately 0.025 km. from weighted mean H=25.68.
2019 AG7NEODyS20332064-211223.65e-06-5.70-5.70NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2018-12-31.615 to 2019-01-11.536."
JPL Sentry17352064-210953.67864e-06-5.70-5.720JPL: Computed at 08:19 today Pacific time based on 42 observations spanning 10.921 days (2018-Dec-31.614374 to 2019-Jan-11.53557). Diameter approximately 0.029 km. from weighted mean H=25.32.
2019 AU6NEODyS20332064-2104322.84e-04-4.37-4.570NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2019-01-02.573 to 2019-01-11.540."
JPL Sentry17352064-2103109.96519e-05-4.84-5.080JPL: Computed at 08:02 today Pacific time based on 26 observations spanning 8.9674 days (2019-Jan-02.571913 to 2019-Jan-11.539357). Diameter approximately 0.017 km. from weighted mean H=26.55.
2019 AC3NEODyS20332091-2118365.14e-04-4.79-5.04-NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2019-01-03.589 to 2019-01-12.403."
JPL Sentry17352091-2118120.0005530679144-4.74-4.750JPL: Computed at 07:47 today Pacific time based on 27 observations spanning 8.8139 days (2019-Jan-03.58822 to 2019-Jan-12.40207). Diameter approximately 0.012 km. from weighted mean H=27.29.
2019 AW2NEODyS20332029-210861.28e-06-5.98-6.220NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2019-01-03.476 to 2019-01-08.997."
2019 AQ2NEODyS20332073-2117361.42e-06-6.54-6.790NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2019-01-03.330 to 2019-01-12.116."
JPL Sentry17352090-211358.18014e-07-6.77-6.990JPL: Computed at 07:44 today Pacific time based on 57 observations spanning 8.7851 days (2019-Jan-03.32957 to 2019-Jan-12.11471). Diameter approximately 0.026 km. from weighted mean H=25.58.
2018 XG5NEODyS2033208311.32e-08-5.65-5.650NEODyS: "Based on 60 optical observations (of which 0 are rejected as outliers) from 2018-12-13.395 to 2019-01-12.187."
JPL Sentry17352083-208313.728e-08-5.19-5.190JPL: Computed at 07:33 today Pacific time based on 60 observations spanning 29.792 days (2018-Dec-13.39431 to 2019-Jan-12.18657). Diameter approximately 0.310 km. from weighted mean H=20.21.
2018 XB4NEODyS20332052-2118678.16e-05-3.90-4.04-NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2018-12-13.344 to 2019-01-11.246."
2010 XCJPL Sentry17352019-21113272.9169366e-06-7.45-8.560JPL: Computed at 07:23 April 7th of 2017 Pacific time based on 8 observations spanning .05836 days (2010-Dec-01.30659 to 2010-Dec-01.36495). Diameter approximately 0.005 km. from weighted mean H=29.11.
2010 DG77JPL Sentry17352020-21175677.3832077e-06-4.84-6.270JPL: Computed at 09:40 April 7th of 2017 Pacific time based on 10 observations spanning .59543 days (2010-Feb-19.17573 to 2010-Feb-19.77116). Diameter approximately 0.044 km. from weighted mean H=24.47.

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 12 January '19

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

0021 1/13Grabbed MPEC 2019-A204 - 2017 SR32 - see above
2358Grabbed MPEC 2019-A199 - 2017 VV14 - see above
Grabbed MPEC 2019-A200 - 2017 WN28 - see above
Grabbed MPEC 2019-A201 - 2017 XB2 - see above
Grabbed MPEC 2019-A202 - 2017 XK61 - see above
Grabbed MPEC 2019-A203 - 2017 SV20 - see above
2335Grabbed MPEC 2019-A192 - 2019 AQ9 - see above
Grabbed MPEC 2019-A193 - 2019 AR9 - see above
Grabbed MPEC 2019-A194 - 2019 AS9 - see above
Grabbed MPEC 2019-A195 - 2019 AT9 - see above
Grabbed MPEC 2019-A196 - 2019 AU9 - see above
Grabbed MPEC 2019-A197 - 2019 AV9 - see above
Grabbed MPEC 2019-A198 - 2017 UA8 - see above
2301Grabbed MPEC 2019-A190 - 2006 CU - see above
Grabbed MPEC 2019-A191 - 2019 AP9 - see above
2257Generated Traffic Report
2230Grabbed MPEC 2019-A189 - 2019 AE9 - see above
2033Noted 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 2019 AC3 risk assessment - see above
Noted that NEODyS has updated its 2019 AG7 risk assessment - see above
Noted that NEODyS has posted 2019 AO8 as an impact risk - see above
Noted that NEODyS has updated its 2019 AQ2 risk assessment - see above
Noted that NEODyS has updated its 2019 AU6 risk assessment - see above
Noted that NEODyS has updated its 2019 AW2 risk assessment - see above
Noted that NEODyS has posted 2019 AZ8 as an impact risk - see above
1735Noted that JPL Sentry has updated its 2010 DG77 risk assessment - see above
Noted that JPL Sentry has updated its 2010 XC 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 AO8 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
Grabbed MPEC 2019-A188 - Daily Orbit Update - see above
0536Grabbed MPEC 2019-A187 - 2018 FO5 - see above
0400Grabbed MPEC 2019-A180 - 2019 AX8 - see above
Grabbed MPEC 2019-A181 - 2019 AY8 - see above
Grabbed MPEC 2019-A182 - 2019 AZ8 - see above
Grabbed MPEC 2019-A183 - 2019 AA9 - see above
Grabbed MPEC 2019-A184 - 2019 AB9 - see above
Grabbed MPEC 2019-A185 - 2019 AD9 - see above
Grabbed MPEC 2019-A186 - 2019 AC9 - see above