Contents  on 10 August '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 10 August '17

One object reported inside ten LD

Only one asteroid is known to be moving within ten lunar distances (LD) of Earth today. 2017 NB7 is outbound from 8.31 to 9.14 LD.

Earth passage I D ~Size Distance Today  Notes
6.83 LD Aug. 62017 NB7 77 m  8.31 to 9.14 LD
Approaching (sorted by 10-LD bubble entry date)
7.87 LD Sept. 291989 VB 389 m  < 10 LD Sept. 25
0.13 LD Oct. 122012 TC4 15 m  < 10 LD Oct. 5, intruder, radar/NHATS target, risk
8.5   LD Oct. 132005 TE49 15 m  < 10 LD Oct. 11, uncertainty +/- 10.1167 hours, NHATS target
5.77 LD Oct. 22171576 1999 VP11 645 m  < 10 LD Oct. 20

This report was generated at 2244 UTC with follow-up in today's DOU MPEC for departed risk-listed 2017 OE7. The DOU also has observations of seventeen other close passers from NEOWISE from the past three years, including for risk-listed 2015 DA54 and 2016 BP14, and adding 2.68 days to what had been the 2.93-day observing arc for intruder 2014 AK51. Eleven other objects had their arcs expanded by 0.81 to 15.13 days.



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 10 August '17

The MPC's NEO Confirmation Page has 45 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 45 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 54 listings on the NEOCP today.

New MPECs  on 10 August '17

Minor Planet Electronic Circulars

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


MPEC 2017-P40 - "23:35 UT" - 2014 VL6


MPEC 2017-P39 - "15:15 UT" - 2017 PX24


MPEC 2017-P38 - "15:12 UT" - 2017 PW24


MPEC 2017-P37 - "15:09 UT" - 2017 OL68


<< DOU on 10 Aug. '17 >>  MPEC 2017-P36 - "12:03 UT" - Daily Orbit Update

Observers  on 10 August '17

Fourteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPECs 2017-P36, 2017-P37, 2017-P38 & 2017-P39 -- 2017 PX24, 2017 PW24, 2017 OL68, 2017 MC7, 2014 YC15, 2011 JW10, 1996 VB3, 96631, 90075, 54789, 475665, 252091, 190166, 141670, 100926, 7341, 7336, 1036
T05ATLAS Haleakala in Hawaii, 12 in MPEC 2017-P36 -- 2017 OF7, 2017 GQ6, 96631, 265962, 237805, 190166, 159467, 142561, 7336, 3752, 1980, 1917
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-P36 -- 90075
160Castelmartini Obs. in Italy, 3 in MPEC 2017-P36 -- 495848, 11398, 1980
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-P37 -- 2017 OL68
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-P39 -- 2017 PX24
J95Great Shefford Obs. in England, 2 in MPECs 2017-P38 & 2017-P39 -- 2017 PX24, 2017 PW24
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2017-P38 & 2017-P39 -- 2017 PX24, 2017 PW24
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2017-P40 -- 2014 VL6
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2017-P36, 2017-P37, 2017-P38 & 2017-P39 -- 2017 PX24, 2017 PW24, 2017 OL68, 2017 OE7, 2012 SQ56, 2002 GP186, 332408, 232368, 136582, 6063
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-P39 -- 2017 PX24
Y00SONEAR in Brazil, 1 in MPEC 2017-P36 -- 3122
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2017-P36 -- 2016 CO246, 2015 DX198
C51WISE in Earth polar orbit, 123 in MPEC 2017-P36 -- 2016 XA18, 2016 WN48, 2016 UZ25, 2016 UH101, 2016 UD41, 2016 TZ19, 2016 TX17, 2016 TM56, 2016 TB57, 2016 TB11, 2016 TA57, 2016 SG2, 2016 RW, 2016 RM40, 2016 PT, 2016 PO8, 2016 PN, 2016 LV47, 2016 LF2, 2016 LD9, 2016 LB, 2016 KD, 2016 JW28, 2016 JU33, 2016 JM17, 2016 GP220, 2016 FY3, 2016 FE12, 2016 FC13, 2016 EZ26, 2016 EV1, 2016 EH157, 2016 EE1, 2016 DO2, 2016 CU30, 2016 CL136, 2016 CB31, 2016 CA136, 2016 BR80, 2016 BP14, 2016 BJ15, 2016 AD166, 2015 YX7, 2015 YT10, 2015 YK, 2015 YB1, 2015 XO129, 2015 XK1, 2015 XE, 2015 XD1, 2015 WH13, 2015 WG9, 2015 VU65, 2015 VF1, 2015 VE1, 2015 VB65, 2015 UM67, 2015 TX24, 2015 TK238, 2015 TE, 2015 TD323, 2015 QG, 2015 PU228, 2015 PK57, 2015 PC, 2015 NZ13, 2015 MT59, 2015 MN116, 2015 LM21, 2015 LL21, 2015 KN122, 2015 JC2, 2015 HX181, 2015 HU171, 2015 HF1, 2015 GS, 2015 FS33, 2015 FN120, 2015 FL, 2015 EE7, 2015 ED7, 2015 DU180, 2015 DN215, 2015 DA54, 2015 CX12, 2015 CP13, 2015 BW310, 2015 BN509, 2014 YL14, 2014 WZ120, 2014 WL6, 2014 WK368, 2014 VL6, 2014 VK2, 2014 VG2, 2014 SV141, 2014 SU260, 2014 RQ17, 2014 QT295, 2014 PW59, 2014 PS59, 2014 NK52, 2014 NE3, 2014 MS5, 2014 MF18, 2014 KV86, 2014 KO76, 2014 JV55, 2014 HG4, 2014 GJ35, 2014 GD50, 2014 FD, 2014 DC, 2014 CR, 2014 CD13, 2014 BX2, 2014 BR8, 2014 BM62, 2014 BH25, 2014 AN51, 2014 AK51, 2014 AG16, 2014 AC
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 August '17

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 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 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
2017 OE7JPL Sentry16022114-211423.35934e-05-5.59-5.590JPL: Computed at 08:35 today Pacific time based on 51 observations spanning 11.125 days (2017-Jul-24.48536 to 2017-Aug-04.610565). Diameter approximately 0.019 km. from weighted mean H=26.27.
2016 BP14JPL Sentry1634R E M O V E DJPL: Risk listing removed at 1610 UTC today.
2015 DA54JPL Sentry16342107-210712.625e-08-5.52-5.520JPL: Computed at 09:20 today Pacific time based on 56 observations spanning 63.211 days (2015-Jan-22.06866 to 2015-Mar-26.279769). Diameter approximately 0.230 km. from weighted mean H=20.83.
2012 TC4JPL Sentry23582050-2089110.001622361631-3.66-3.720JPL: Computed at 11:13 today Pacific time based on 228 observations spanning 1765.9 days (2012-Oct-04.467661 to 2017-Aug-05.39707). Diameter approximately 0.015 km. from weighted mean H=26.74.

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 10 August '17

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

2358Noted that JPL Sentry has updated its 2012 TC4 risk assessment - see above
Grabbed MPEC 2017-P40 - 2014 VL6 - see above
2244Generated Traffic Report
1634Noted that JPL Sentry has updated its 2015 DA54 risk assessment - see above
Noted that JPL Sentry has removed 2016 BP14 as an impact risk - see above
1602Noted that JPL Sentry has updated its 2017 OE7 risk assessment - see above
1530Grabbed MPEC 2017-P37 - 2017 OL68 - see above
Grabbed MPEC 2017-P38 - 2017 PW24 - see above
Grabbed MPEC 2017-P39 - 2017 PX24 - see above
1450Grabbed MPEC 2017-P36 - Daily Orbit Update - see above