Contents  on 13 February '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 13 February '19

Eight objects reported inside ten LD

There are eight asteroids reported inside ten lunar distances (LD) of our planet today. The two nearest are 2019 CG4, which exits Earth's SOI, as it moves out from 2.00 to 3.21 LD, and 2019 CN2, outbound from 3.09 to 4.72 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
0.31 LD Feb. 11 2019 CN5 9 m  5.97 to 9.48 LD Feb. 8 - 14 NEW, intruder - MPEC
1.38 LD Feb. 8 2019 CM5 10 m  5.58 to 6.78 LD Jan. 31 - Feb. 16 NEW, risk - MPEC
1.47 LD Feb. 11 2019 CN2 8 m  3.09 to 4.72 LD Feb. 5 - 17 NHATS target - DOU
1.78 LD yesterday 2019 CG4 6 m  2.00 to 3.21 LD Feb. 6 - 18 NHATS target, exits Earth SOI
2.72 LD Feb. 10 2019 CB2 22 m  9.03 to 11.85 LD Feb. 6 - 13 exits ten LD
5.93 LD Feb. 16 2019 CG5 13 m  8.13 from 9.62 LD yesterday - Feb. 20 NEW - MPEC
7.3   LD yesterday* 2017 PV25 41 m  7.3 to 7.5 LD Feb. 7 - 17 EPU +/- 1.07 hours*, NHATS target
8.00 LD yesterday 2019 CY2 15 m  8.39 to 9.69 LD Feb. 10 - 14 risk
* EPU = Earth passage uncertainty

This report was generated at 2045 UTC with the discoveries of inbound 2019 CG5 (MPEC), outbound intruder 2019 CN5 (MPEC), which passed the Earth at 0.31 LD and the Moon at 0.70 LD on February 11th, outbound risk-listed 2019 CM5 (MPEC), and already departed 2019 CB5 (MPEC), which went by us at about 8.9 LD* on January 25th. Today's DOU MPEC has the recovery of distant 2018 TS4 and follow-up for outbound 2019 CN2 and departed 2013 VX4.

Approaching - sorted by 10-LD bubble entry date
3.3   LD Feb. 20* 2019 CY1 25 m  19.4 from 22.4 LD Feb. 17 - 23 EPU +/- 6 mins.*, risk
7.4   LD Feb. 25* 2019 CJ 25 m  14.7 from 15.7 LD Feb. 19 - March 3 EPU +/- 24 mins.*, NHATS target
6.2   LD March 2* 2019 CT4 49 m  47.6 from 50.4 LD Feb. 28 - March 5 EPU +/- 2.04 days*



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 an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently so close. 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.

Radar Astrometry  on 13 February '19

Radar observation of six objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0308 UTC when the database was dated 12 Feb.


Data update noted at 2035 UTC when the database was dated 13 Feb.


Data update noted at 2122 UTC when the database was dated 13 Feb.


Data update noted at 2358 UTC when the database was dated 13 Feb.

NEOCP Activity  on 13 February '19

The MPC's NEO Confirmation Page has 37 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 37 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 59 listings on the NEOCP today.

New MPECs  on 13 February '19

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 21 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 13 Feb. '19 >>  MPEC 2019-C153 - "13:06 UT" - Daily Orbit Update


MPEC 2019-C152 - "12:02 UT" - 2008 RZ24


MPEC 2019-C151 - "06:24 UT" - 2019 CN5


MPEC 2019-C150 - "06:20 UT" - 2019 CM5


MPEC 2019-C149 - "06:16 UT" - 2019 CZ4


MPEC 2019-C148 - "06:11 UT" - 2019 CL5


MPEC 2019-C147 - "06:07 UT" - 2019 CK5


MPEC 2019-C146 - "06:03 UT" - 2019 CJ5


MPEC 2019-C145 - "05:58 UT" - 2019 CH5


MPEC 2019-C144 - "05:53 UT" - 2019 CG5


MPEC 2019-C143 - "05:47 UT" - 2019 CF5


MPEC 2019-C142 - "05:41 UT" - 2019 CE5


MPEC 2019-C141 - "05:36 UT" - 2019 CD5


MPEC 2019-C140 - "05:31 UT" - 2019 CC5


MPEC 2019-C139 - "05:27 UT" - 2019 CB5


MPEC 2019-C138 - "05:23 UT" - 2019 CA5


MPEC 2019-C137 - "05:19 UT" - 2019 CY4


MPEC 2019-C136 - "05:14 UT" - 2019 CX4


MPEC 2019-C135 - "05:10 UT" - 2012 DZ32


MPEC 2019-C134 - "05:07 UT" - 2006 DP62


MPEC 2019-C133 - "00:44 UT" - 2005 VJ1

Observers  on 13 February '19

A total of 42 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 6 in radar -- 2018 RQ2, 2018 QU1, 2018 PL10, 2015 QM3, 439313, 420591
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2019-C153 -- 2019 AX, 2019 AO5, 2018 YV, 2018 QT, 2016 OP5, 2014 XD8, 2013 VX4, 2006 QS89, 361861, 303174
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-C134 -- 2006 DP62
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-C142 -- 2019 CE5
V03Big Water Obs. in Utah, 5 in MPECs 2019-C142, 2019-C143, 2019-C144, 2019-C145 & 2019-C151 -- 2019 CN5, 2019 CH5, 2019 CG5, 2019 CF5, 2019 CE5
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2019-C134, 2019-C140, 2019-C142, 2019-C145 & 2019-C151 -- 2019 CN5, 2019 CH5, 2019 CE5, 2019 CC5, 2006 DP62
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 9 in MPECs 2019-C135, 2019-C136, 2019-C138, 2019-C139, 2019-C141, 2019-C146, 2019-C147, 2019-C148 & 2019-C150 -- 2019 CX4, 2019 CM5, 2019 CL5, 2019 CK5, 2019 CJ5, 2019 CD5, 2019 CB5, 2019 CA5, 2012 DZ32
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2019-C138, 2019-C141 & 2019-C153 -- 2019 CD5, 2019 CA5, 2019 AQ9, 2019 AN6, 2019 AJ3, 2018 RV5, 2018 PX19
W84%program code "%" (14) via DECam in Chile, 1 in MPEC 2019-C153 -- 2014 HN198
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2019-C133 -- 2005 VJ1
734Farpoint Obs. in Kansas, 2 in MPEC 2019-C153 -- 2019 CF5, 2019 CE5
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2019-C142 & 2019-C143 -- 2019 CF5, 2019 CE5
K83Forti Obs., 1 in MPEC 2019-C153 -- 381677
E89Geyserland Obs. in New Zealand, 8 in MPEC 2019-C153 -- 31210, 18736, 163902, 163000, 136635, 4596, 3199, 1943
203GiaGa Obs. in Italy, 2 in MPECs 2019-C142 & 2019-C145 -- 2019 CH5, 2019 CE5
K88GINOP-KHK in Hungary, 6 in MPECs 2019-C140, 2019-C143, 2019-C144, 2019-C145, 2019-C151 & 2019-C153 -- 2019 CO4, 2019 CN5, 2019 CH5, 2019 CG5, 2019 CF5, 2019 CC5
J95Great Shefford Obs. in England, 6 in MPECs 2019-C142, 2019-C143, 2019-C144, 2019-C145, 2019-C148 & 2019-C153 -- 2019 CL5, 2019 CH5, 2019 CG5, 2019 CF5, 2019 CE5, 2019 CE4
511Haute Provence Obs. in Germany, 1 in MPEC 2019-C153 -- 2019 CN2
K38M57 Obs. in Italy, 1 in MPEC 2019-C142 -- 2019 CE5
L52MASTER Tavrida, 1 in MPEC 2019-C153 -- 275611
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-C136 -- 2019 CX4
V01Mountainville Obs. in Utah, 4 in MPECs 2019-C142, 2019-C145 & 2019-C153 -- 2019 CH5, 2019 CE5, 2019 AP3, 2018 XU6
474Mt. John Obs. in New Zealand, 6 in MPECs 2019-C134, 2019-C150, 2019-C151 & 2019-C153 -- 2019 CN5, 2019 CM5, 2019 CD2, 2019 AV9, 2019 AG13, 2006 DP62
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2019-C133, 2019-C135, 2019-C139, 2019-C140, 2019-C141, 2019-C143, 2019-C144, 2019-C146, 2019-C147, 2019-C148, 2019-C150 & 2019-C153 -- 2019 CO4, 2019 CM5, 2019 CL5, 2019 CK5, 2019 CJ5, 2019 CG5, 2019 CF5, 2019 CD5, 2019 CC5, 2019 CB5, 2012 DZ32, 2005 VJ1
Z80Northolt Branch Obs. in England, 2 in MPECs 2019-C142 & 2019-C153 -- 2019 CE5, 180186
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2019-C133, 2019-C136, 2019-C137, 2019-C138, 2019-C144 & 2019-C149 -- 2019 CZ4, 2019 CY4, 2019 CX4, 2019 CG5, 2019 CA5, 2005 VJ1
F52Pan-STARRS 2 (PS2) in Hawaii, 5 in MPECs 2019-C133, 2019-C137, 2019-C140, 2019-C141 & 2019-C147 -- 2019 CY4, 2019 CK5, 2019 CD5, 2019 CC5, 2005 VJ1
K63Pascoli Obs. in Italy, 2 in MPECs 2019-C142 & 2019-C143 -- 2019 CF5, 2019 CE5
323Perth Obs. in Western Australia, 3 in MPEC 2019-C153 -- 2019 AW4, 2019 AP3, 2012 OP4
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2019-C142, 2019-C143, 2019-C144 & 2019-C145 -- 2019 CH5, 2019 CG5, 2019 CF5, 2019 CE5
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-C149 -- 2019 CZ4
C95SATINO-1 in France, 6 in MPECs 2019-C142, 2019-C143, 2019-C144, 2019-C151 & 2019-C153 -- 2019 CO4, 2019 CN5, 2019 CG5, 2019 CF5, 2019 CE5, 2012 OP4
K96Savelli Obs., 1 in MPEC 2019-C143 -- 2019 CF5
204Schiaparelli Obs. in Italy, 7 in MPECs 2019-C140, 2019-C142, 2019-C143, 2019-C144, 2019-C145, 2019-C150 & 2019-C151 -- 2019 CN5, 2019 CM5, 2019 CH5, 2019 CG5, 2019 CF5, 2019 CE5, 2019 CC5
033Schwarzschild Obs. in Germany, 3 in MPECs 2019-C142, 2019-C143 & 2019-C145 -- 2019 CH5, 2019 CF5, 2019 CE5
Y28Sertao de Itaparica Obs. in Brazil, 1 in MPEC 2019-C133 -- 2005 VJ1
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C153 -- 2018 YJ
587Sormano Obs. in Italy, 6 in MPECs 2019-C142, 2019-C143, 2019-C144, 2019-C145, 2019-C149 & 2019-C151 -- 2019 CZ4, 2019 CN5, 2019 CH5, 2019 CG5, 2019 CF5, 2019 CE5
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2019-C153 -- 2019 BA5, 2018 YW2, 2018 YJ, 2018 XH
I52Steward Obs. Mt. Lemmon Station in Arizona, 14 in MPECs 2019-C134, 2019-C135, 2019-C137, 2019-C138, 2019-C139, 2019-C140, 2019-C142, 2019-C143, 2019-C144, 2019-C145, 2019-C146, 2019-C148, 2019-C149 & 2019-C151 -- 2019 CZ4, 2019 CY4, 2019 CN5, 2019 CL5, 2019 CJ5, 2019 CH5, 2019 CG5, 2019 CF5, 2019 CE5, 2019 CC5, 2019 CB5, 2019 CA5, 2012 DZ32, 2006 DP62
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2019-C152 & 2019-C153 -- 2018 TS4, 2008 RZ24
L01Visnjan Obs., 17 in MPECs 2019-C134, 2019-C135, 2019-C136, 2019-C137, 2019-C138, 2019-C140, 2019-C142, 2019-C143, 2019-C144, 2019-C145, 2019-C146, 2019-C147, 2019-C148, 2019-C149, 2019-C150, 2019-C151 & 2019-C153 -- 2019 CZ4, 2019 CY4, 2019 CX4, 2019 CO4, 2019 CN5, 2019 CM5, 2019 CL5, 2019 CK5, 2019 CJ5, 2019 CH5, 2019 CG5, 2019 CF5, 2019 CE5, 2019 CC5, 2019 CA5, 2012 DZ32, 2006 DP62
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 February '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
2019 CM5JPL Sentry17552044-2118138.1898063e-06-6.69-7.320JPL: Computed at 23:31 Feb. 12th Pacific time based on 19 observations spanning 1.6649 days (2019-Feb-11.43441 to 2019-Feb-13.099296). Diameter approximately 0.009 km. from weighted mean H=27.76.
NEODyS17552065-2118216.75e-06-6.83-7.35-NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2019-02-11.435 to 2019-02-13.100."
2019 CL5JPL Sentry17552111-211115.379e-08-7.40-7.400JPL: Computed at 23:28 Feb. 12th Pacific time based on 18 observations spanning 1.6778 days (2019-Feb-11.3911 to 2019-Feb-13.068877). Diameter approximately 0.039 km. from weighted mean H=24.68.
NEODyS1755211111.05e-07-7.17-7.170NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2019-02-11.392 to 2019-02-13.070."
2019 CE4JPL Sentry17552025-2117106.38414e-08-3.04-3.150JPL: Computed at 07:42 today Pacific time based on 32 observations spanning 4.7594 days (2019-Feb-08.1197 to 2019-Feb-12.879126). Diameter approximately 0.875 km. from weighted mean H=17.94.
NEODyS17552025-2117218.63e-08-2.99-3.130NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2019-02-08.115 to 2019-02-12.880."
2019 BE5NEODyS17552038-2116262.03e-05-4.45-4.550NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2019-01-31.325 to 2019-02-08.147."
2018 YW2JPL Sentry17552069-206914.210e-07-6.04-6.040JPL: Computed at 07:32 today Pacific time based on 67 observations spanning 42.941 days (2018-Dec-31.52399 to 2019-Feb-12.46451). Diameter approximately 0.053 km. from weighted mean H=24.01.
NEODyS1755206914.07e-07-6.07-6.070NEODyS: "Based on 68 optical observations (of which 0 are rejected as outliers) from 2018-12-31.525 to 2019-02-12.503."
2014 HN198JPL Sentry1755R E M O V E DJPL: Risk listing removed at 1530 UTC today
NEODyS1755R E M O V E D-

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 13 February '19

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

2358Noted Radar Astrometry database update - see above
2122Noted Radar Astrometry database update - see above
2045Generated Traffic Report
2035Noted Radar Astrometry database update - see above
1755Noted that JPL Sentry has removed 2014 HN198 as an impact risk - see above
Noted that NEODyS has removed 2014 HN198 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 YW2 risk assessment - see above
Noted that NEODyS has updated its 2018 YW2 risk assessment - see above
Noted that NEODyS has updated its 2019 BE5 risk assessment - see above
Noted that JPL Sentry has updated its 2019 CE4 risk assessment - see above
Noted that NEODyS has updated its 2019 CE4 risk assessment - see above
Noted that JPL Sentry has posted 2019 CL5 as an impact risk - see above
Noted that NEODyS has posted 2019 CL5 as an impact risk - see above
Noted that JPL Sentry has posted 2019 CM5 as an impact risk - see above
Noted that NEODyS has posted 2019 CM5 as an impact risk - see above
Grabbed MPEC 2019-C152 - 2008 RZ24 - see above
Grabbed MPEC 2019-C153 - Daily Orbit Update - see above
0705Grabbed MPEC 2019-C143 - 2019 CF5 - see above
Grabbed MPEC 2019-C144 - 2019 CG5 - see above
Grabbed MPEC 2019-C145 - 2019 CH5 - see above
Grabbed MPEC 2019-C146 - 2019 CJ5 - see above
Grabbed MPEC 2019-C147 - 2019 CK5 - see above
Grabbed MPEC 2019-C148 - 2019 CL5 - see above
Grabbed MPEC 2019-C149 - 2019 CZ4 - see above
Grabbed MPEC 2019-C150 - 2019 CM5 - see above
Grabbed MPEC 2019-C151 - 2019 CN5 - see above
0543Grabbed MPEC 2019-C138 - 2019 CA5 - see above
Grabbed MPEC 2019-C139 - 2019 CB5 - see above
Grabbed MPEC 2019-C140 - 2019 CC5 - see above
Grabbed MPEC 2019-C141 - 2019 CD5 - see above
Grabbed MPEC 2019-C142 - 2019 CE5 - see above
0520Grabbed MPEC 2019-C134 - 2006 DP62 - see above
Grabbed MPEC 2019-C135 - 2012 DZ32 - see above
Grabbed MPEC 2019-C136 - 2019 CX4 - see above
Grabbed MPEC 2019-C137 - 2019 CY4 - see above
0308Grabbed MPEC 2019-C133 - 2005 VJ1 - see above
Noted Radar Astrometry database update - see above