Contents  on 15 February '17

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 15 February '17

Three objects reported inside ten LD

Today there are three minor objects reported traveling inside ten lunar distances (LD) of Earth. Nearest is radar/NHATS target 2017 BW, inbound from 5.18 to 4.79 LD. Further out, NHATS target 2017 CP1 comes into our ten-LD traffic reporting zone, moving in from 10.31 to 9.35 LD.

Earth passage I D ~Size Distance Today  Notes
2.48 LD Feb. 52017 BG30 4 m  7.28 to 7.97 LD NHATS target
3.58 LD Feb. 242017 CP1 40 m  9.35 from 10.31 LD enters ten LD, NHATS target - DOU
4.64 LD Feb. 172017 BW 70 m  4.79 from 5.18 LD radar/NHATS target - DOU
Approaching (in 10-LD bubble entry date order)
2.37 LD Feb. 232017 BY93 82 m  < 10 LD Feb. 21, risk - DOU
2.7   LD March 22012 DR32 41 m  < 10 LD Feb. 28, uncertainty +/- 4.1333 hours
8.34 LD March 161998 SL36 309 m  < 10 LD March 14
7.63 LD March 262015 TC25 4 m  < 10 LD March 17, radar/NHATS target, risk
4.57 LD April 192014 JO25 812 m  < 10 LD April 18
8.0   LD May 292017 CS 452 m  < 10 LD May 26, uncertainty +/- 1.6167 hours

This report was generated at 1851 UTC with follow-up in today's DOU MPEC for 2017 CP1, 2017 BY93, 2017 BW, and departed NHATS target 2017 AG5.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant 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 distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 15 February '17

The MPC's NEO Confirmation Page has 40 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 40 objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of 53 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 15 February '17

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.


<< DOU on 15 Feb. '17 >>  MPEC 2017-C88 - "13:04 UT" - Daily Orbit Update


MPEC 2017-C87 - "03:33 UT" - 2017 BG85

Observers  on 15 February '17

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
K82Alphard Obs., 1 in MPEC 2017-C88 -- 2017 BW
H21Astronomical Research Obs. Westfield in Illinois, 25 in MPEC 2017-C88 -- 2017 BW, 2017 BP31, 2017 BM6, 2017 AP20, 2017 AB17, 2016 YR8, 2016 UU80, 2016 LV8, 2011 WO41, 2004 UB, 54789, 475665, 370307, 252558, 226198, 153951, 138846, 13651, 11398, 5693, 5653, 5626, 4179, 3103, 1627
T05ATLAS Haleakala in Hawaii, 3 in MPEC 2017-C88 -- 2011 WO41, 5653, 3691
T08ATLAS Mauna Loa in Hawaii, 2 in MPEC 2017-C88 -- 2011 WO41, 5653
V03Big Water Obs. in Utah, 1 in MPEC 2017-C88 -- 2016 XD1
160Castelmartini Obs. in Italy, 8 in MPEC 2017-C88 -- 96590, 433953, 363831, 347813, 24445, 12538, 887, 433
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 2 in MPEC 2017-C88 -- 2017 CP1, 2017 BU6
240Herrenberg Obs. in Germany, 2 in MPEC 2017-C88 -- 2016 PR8, 5693
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-C88 -- 2017 BL30
246KLENOT in the Czech Republic, 13 in MPECs 2017-C87 & 2017-C88 -- 2017 CP1, 2017 BY93, 2017 BM3, 2017 BG85, 2017 AF5, 2016 UU80, 2014 EW24, 2013 VC13, 2010 CM44, 2006 WS1, 2006 OH15, 2001 QE34, 3352
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-C87 -- 2017 BG85
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-C88 -- 2011 WO41
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2017-C88 -- 2013 VC13
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2017-C87 & 2017-C88 -- 2017 BO3, 2017 BG85, 2017 AG5, 2017 AF5, 2016 XD1, 2016 VQ5, 2016 OO, 2010 GA34, 2005 TF, 363814, 315020, 259221, 240320, 159533, 1862
W25RMS Obs., 4 in MPEC 2017-C88 -- 2017 BL3, 2013 YK148, 2006 EC1, 20255
K61Rokycany Obs. in the Czech Republic, 2 in MPEC 2017-C88 -- 2017 BL30, 2017 BL3
Y00SONEAR in Brazil, 4 in MPEC 2017-C88 -- 40267, 21088, 193178, 7341
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2017-C88 -- 2017 CJ1, 2015 FJ36
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2017-C88 -- 2017 CH1, 2017 BL30, 2017 BD29
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-C88 -- 2017 BO3
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2017-C88 -- 96590, 3352
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 February '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program 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
2017 CH1NEODyS1717R E M O V E D-
JPL Sentry1717R E M O V E DJPL: Risk listing removed at 1606 UTC.
2017 BY93JPL Sentry1717205711.5e-06-4.60-4.600JPL: "Analysis based on 42 observations spanning 19.373 days (2017-Jan-26.49954 to 2017-Feb-14.87234)." Diameter approximately 0.082 km. from mean, weighted H=23.1.
2017 BL30JPL Sentry17172029-205269.9e-05-2.74-2.740JPL: "Analysis based on 132 observations spanning 17.911 days (2017-Jan-28.37792 to 2017-Feb-15.28936)." Diameter approximately 0.074 km. from mean, weighted H=23.3.

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 15 February '17

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

1851Generated Traffic Report
1717Noted that JPL Sentry has updated its 2017 BL30 risk assessment - see above
Noted that JPL Sentry has updated its 2017 BY93 risk assessment - see above
Noted that JPL Sentry has removed 2017 CH1 as an impact risk - see above
Noted that NEODyS has removed 2017 CH1 as an impact risk - see above
Grabbed MPEC 2017-C88 - Daily Orbit Update - see above
0508Grabbed MPEC 2017-C87 - 2017 BG85 - see above