Contents  on 8 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 8 February '19

Three objects reported inside ten LD

There are three Solar-System small bodies reported less than ten lunar distances (LD) from our home world today. Nearest is 2019 CB2, inbound from 6.59 to 4.11 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
2.72 LD Feb. 10 2019 CB2 22 m  4.11 from 6.59 LD Feb. 6 - 13 DOU
4.14 LD Feb. 6 2019 BK4 13 m  5.75 to 7.33 LD Feb. 1 - 10 NHATS target
7.3   LD Feb. 12* 2017 PV25 41 m  8.7 from 9.5 LD yesterday - Feb. 17 EPU +/- 1.07 hours*, NHATS target
Approaching - sorted by 10-LD bubble entry date
3.3   LD Feb. 20* 2019 CY1 26 m  34.6 from 37.7 LD Feb. 17 - 23 EPU +/- 1.60 hours*
7.4   LD Feb. 25* 2019 CJ 25 m  19.8 from 20.9 LD Feb. 19 - March 3 EPU +/- 24 mins.*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 2122 UTC with follow-up in today's DOU MPEC for inbound 2019 CB2 and four departed objects: 2019 BF5, 2019 BD5, and including risk-listed objects 2019 BE5, and intruder 2019 BO.

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 8 February '19

The MPC's NEO Confirmation Page has 58 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 58 objects listed. Of these, 30 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 8 February '19

Minor Planet Electronic Circulars

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

MPEC 2019-C78 - "21:02 UT" - 2016 CY247

<< DOU on 8 Feb. '19 >>  MPEC 2019-C77 - "13:12 UT" - Daily Orbit Update

Observers  on 8 February '19

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

CodeObserver / observatory
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-C77 -- 2019 BF5
160Castelmartini Obs. in Italy, 7 in MPEC 2019-C77 -- 2019 BF5, 523604, 511684, 457260, 18736, 163051, 6178
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2019-C77 -- 2019 AT3, 2019 AA15, 2018 YF2, 2018 WE3
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPEC 2019-C77 -- 2019 BF5, 2019 BE5, 2019 BB5
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-C77 -- 2019 BF5
K88GINOP-KHK in Hungary, 1 in MPEC 2019-C77 -- 2019 BF5
K73Gravina Obs. in Italy, 3 in MPEC 2019-C77 -- 18736, 5131, 1620
Z43Landehen Obs., 2 in MPEC 2019-C77 -- 515767, 419880
Z21LCO Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2019-C77 -- 2019 CT1
V01Mountainville Obs. in Utah, 3 in MPEC 2019-C77 -- 2019 BF5, 2019 BF1, 2018 VB9
474Mt. John Obs. in New Zealand, 5 in MPEC 2019-C77 -- 2019 BF5, 2019 BF2, 2019 AT9, 2019 AG13, 2014 SL303
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-C78 -- 2016 CY247
J43Oukaimeden Obs. in Morocco, 4 in MPEC 2019-C77 -- 455176, 35396, 231134, 18736
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2019-C77 & 2019-C78 -- 2016 UW40, 2016 CY247, 2015 FZ344, 2012 DF31
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-C77 -- 2019 AA15
L18QOS Obs., 3 in MPEC 2019-C77 -- 2019 CT1, 2019 CB2, 2018 VZ9
K33San Defendente Obs. in Italy, 1 in MPEC 2019-C77 -- 2019 BF5
L11Sandvreten Obs., 1 in MPEC 2019-C77 -- 512245
C95SATINO-1 in France, 1 in MPEC 2019-C77 -- 329390
033Schwarzschild Obs. in Germany, 3 in MPEC 2019-C77 -- 2019 BF5, 2019 BF1, 2019 BA5
G40!M. Kumrucu-Lohmiller in Massachusetts via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C77 -- 2019 AR13
G40'program code "'" (16) via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C77 -- 2019 CU1
W88!program code "!" (10) via Chile Obs. in Chile, 1 in MPEC 2019-C77 -- 2019 CD2
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2019-C77 -- 2019 CO1, 2019 BE5, 2019 AP8, 2018 XV5, 2015 BG4, 2003 FF5
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPEC 2019-C77 -- 2019 BD5, 2018 PP10
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2019-C77 -- 2019 BO, 2007 CA27, 1998 VS
L01Visnjan Obs., 1 in MPEC 2019-C77 -- 2019 BF5
C51WISE in Earth polar orbit, 2 in MPEC 2019-C77 -- 2018 KV, 2015 XC1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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.





Notes for Today's Latest Risk Assessments
2019 CO1JPL Sentry1710R E M O V E DJPL: Risk listing removed at 1548 UTC today
2019 BE5JPL Sentry17102038-2086101.324517e-05-4.58-4.650JPL: Computed at 08:27 today Pacific time based on 73 observations spanning 7.8173 days (2019-Jan-31.324536 to 2019-Feb-08.14183). Diameter approximately 0.033 km. from weighted mean H=25.07.
2019 BB5JPL Sentry17102109-210912.470e-07-7.80-7.800JPL: Computed at 07:51 today Pacific time based on 60 observations spanning 8.5287 days (2019-Jan-30.35613 to 2019-Feb-07.88486). Diameter approximately 0.016 km. from weighted mean H=26.66.
2019 BOJPL Sentry17102055-2095151.11309e-05-6.64-7.250JPL: Computed at 07:38 today Pacific time based on 19 observations spanning 19.185 days (2019-Jan-17.25468 to 2019-Feb-05.439843). Diameter approximately 0.008 km. from weighted mean H=28.13.

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 8 February '19

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

2122Generated Traffic Report
2103Grabbed MPEC 2019-C78 - 2016 CY247 - see above
1710Noted that JPL Sentry has reposted 2019 BB5 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 BE5 risk assessment - see above
Noted that JPL Sentry has updated its 2019 BO risk assessment - see above
Noted that JPL Sentry has removed 2019 CO1 as an impact risk - see above
Grabbed MPEC 2019-C77 - Daily Orbit Update - see above