Contents  on 9 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 9 February '19

Four objects reported inside ten LD

There are four planetesimals reported within ten lunar distances (LD) of Earth today. Nearest are 2019 CB2, inbound from 4.11 to 2.72 LD, and newly announced 2019 CN2, which moves in from 4.58 to 2.96 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
1.47 LD Feb. 11 2019 CN2 8 m  2.96 from 4.58 LD Feb. 5 - 17 NEW, NHATS target - MPEC
2.72 LD tomorrow 2019 CB2 22 m  2.72 from 4.11 LD Feb. 6 - 13 DOU
4.14 LD Feb. 6 2019 BK4 13 m  7.33 to 9.10 LD Feb. 1 - 10 NHATS target
7.3   LD Feb. 12* 2017 PV25 41 m  8.0 from 8.7 LD Feb. 7 - 17 EPU +/- 1.07 hours*, NHATS target
Approaching - sorted by 10-LD bubble entry date
3.3   LD Feb. 20* 2019 CY1 26 m  31.5 from 34.6 LD Feb. 17 - 23 EPU +/- 1.60 hours*, risk
7.4   LD Feb. 25* 2019 CJ 25 m  18.8 from 19.8 LD Feb. 19 - March 3 EPU +/- 24 mins.*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1920 UTC with the discovery of inbound 2019 CN2 (MPEC) and with follow-up in today's DOU MPEC for inbound 2019 CB2 and departed 2019 BF5.



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 9 February '19

The MPC's NEO Confirmation Page has 94 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 94 objects listed. Of these, 49 were "one nighters." The Tracking News counted a total of 101 listings on the NEOCP on this day.

New MPECs  on 9 February '19

Minor Planet Electronic Circulars

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


MPEC 2019-C85 - "23:59 UT" - 2015 BQ4


<< DOU on 9 Feb. '19 >>  MPEC 2019-C84 - "13:08 UT" - Daily Orbit Update


MPEC 2019-C83 - "02:15 UT" - 2019 CO2


MPEC 2019-C82 - "02:11 UT" - 2019 CN2


MPEC 2019-C81 - "02:07 UT" - 2019 CM2


MPEC 2019-C80 - "01:55 UT" - 2019 CL2


MPEC 2019-C79 - "01:42 UT" - 2015 CA14

Observers  on 9 February '19

A total of 25 observers appeared in this day's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-C84 -- 5332
160Castelmartini Obs. in Italy, 7 in MPEC 2019-C84 -- 2012 BN11, 515767, 31210, 137925, 137802, 10302, 7358
703Catalina Sky Survey (CSS) in Arizona, 33 in MPEC 2019-C84 -- 2019 CT1, 2016 CA136, 85275, 68063, 523619, 458122, 455176, 417419, 40267, 381677, 318411, 31210, 275611, 267759, 229672, 20790, 18736, 18109, 170891, 162741, 153243, 152941, 152931, 139622, 139047, 137925, 12711, 10302, 8176, 6178, 3691, 1916, 1862
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2019-C84 -- 2013 PF67, 2011 AA37, 2005 JB
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2019-C79, 2019-C80 & 2019-C85 -- 2019 CL2, 2015 CA14, 2015 BQ4
Z17LCO Tenerife Aqawan A#2 in the Canary Islands, 1 in MPEC 2019-C84 -- 455176
181Makes Obs. in France, 1 in MPEC 2019-C84 -- 2019 CB2
C94MASTER-II Tunka in Russia, 1 in MPEC 2019-C84 -- 31210
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-C81 -- 2019 CM2
C65Montsec Obs. in Spain, 1 in MPEC 2019-C84 -- 2019 CB2
G96Mt. Lemmon Survey (MLS) in Arizona, 21 in MPECs 2019-C82, 2019-C83 & 2019-C84 -- 2019 CP1, 2019 CO2, 2019 CN2, 2019 CC2, 2015 LG2, 2013 XH4, 2005 CL7, 419829, 381564, 311925, 19764, 18109, 162004, 159608, 154007, 153243, 139056, 137925, 136923, 10302, 1862
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2019-C84 -- 2016 BX14, 18736
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2019-C79, 2019-C80, 2019-C82, 2019-C83 & 2019-C84 -- 2019 CO2, 2019 CN2, 2019 CL2, 2015 CA14, 2008 UC95, 2008 GP20, 85236, 331990, 276049, 275976, 208565, 163412, 139622, 138095, 8176
F52Pan-STARRS 2 (PS2) in Hawaii, 6 in MPECs 2019-C81 & 2019-C84 -- 2019 CM2, 458198, 388188, 356285, 32906, 2368
323Perth Obs. in Western Australia, 1 in MPEC 2019-C84 -- 96536
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-C82 -- 2019 CN2
H36Sandlot Obs. in Kansas, 4 in MPECs 2019-C79, 2019-C80, 2019-C81 & 2019-C84 -- 2019 CM2, 2019 CL2, 2018 XQ4, 2015 CA14
C95SATINO-1 in France, 1 in MPEC 2019-C84 -- 345705
204Schiaparelli Obs. in Italy, 5 in MPEC 2019-C84 -- 2019 BF5, 2009 DL1, 2008 WX32, 2006 OT9, 2004 YU5
033Schwarzschild Obs. in Germany, 2 in MPECs 2019-C79 & 2019-C81 -- 2019 CM2, 2015 CA14
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C84 -- 2018 YJ
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C84 -- 65803
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2019-C84 -- 2018 XV5, 2015 BG4
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2019-C79, 2019-C80, 2019-C82 & 2019-C84 -- 2019 CN2, 2019 CL2, 2019 BF5, 2019 BF2, 2019 AT9, 2019 AF11, 2015 CA14
L01Visnjan Obs., 4 in MPECs 2019-C79, 2019-C80, 2019-C81 & 2019-C82 -- 2019 CN2, 2019 CM2, 2019 CL2, 2015 CA14
I41Zwicky Transient Facility (ZTF) in southern California, 7 in MPEC 2019-C84 -- 2019 BG2, 2019 BG1, 2015 AQ45, 2009 SV17, 39572, 4015, 1863
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 February '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 CZ1NEODyS18312046-211532.35e-08-7.19-7.30NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2019-02-04.424 to 2019-02-06.968."
2019 CY1NEODyS1831204413.19e-11-10.48-10.480NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2019-02-04.368 to 2019-02-07.171."
2019 CO1NEODyS18312031-2114111.98e-09-8.39-8.880NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2019-02-04.427 to 2019-02-08.374."
2019 BE5NEODyS18312038-2100251.98e-05-4.42-4.50NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2019-01-31.325 to 2019-02-08.147."
2019 BB5NEODyS1831210912.07e-07-7.88-7.880NEODyS: "Based on 60 optical observations (of which 0 are rejected as outliers) from 2019-01-30.357 to 2019-02-07.886."
2019 BZ3NEODyS1831209222.73e-09-10.58-10.590NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2019-01-28.428 to 2019-02-05.568."
2019 BONEODyS18312044-2101251.15e-05-6.66-7.290NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2019-01-17.255 to 2019-02-05.441."
2018 YW2NEODyS1831206923.01e-08-7.19-7.380NEODyS: "Based on 60 optical observations (of which 0 are rejected as outliers) from 2018-12-31.525 to 2019-02-06.638."

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 9 February '19

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

0018 2/10Grabbed MPEC 2019-C85 - 2015 BQ4 - see above
1920Generated Traffic Report
1831Noted that NEODyS has updated its 2018 YW2 risk assessment - see above
Noted that NEODyS has updated its 2019 BB5 risk assessment - see above
Noted that NEODyS has updated its 2019 BE5 risk assessment - see above
Noted that NEODyS has updated its 2019 BO risk assessment - see above
Noted that NEODyS has updated its 2019 BZ3 risk assessment - see above
1830Noted that NEODyS has posted 2019 CO1 as an impact risk - see above
Noted that NEODyS has posted 2019 CY1 as an impact risk - see above
Noted that NEODyS has posted 2019 CZ1 as an impact risk - see above
1720Grabbed MPEC 2019-C84 - Daily Orbit Update - see above
0605Grabbed MPEC 2019-C79 - 2015 CA14 - see above
Grabbed MPEC 2019-C80 - 2019 CL2 - see above
Grabbed MPEC 2019-C81 - 2019 CM2 - see above
Grabbed MPEC 2019-C82 - 2019 CN2 - see above
Grabbed MPEC 2019-C83 - 2019 CO2 - see above