Contents  on 18 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 18 August '17

One object reported inside ten LD

One transient natural object is reported within ten lunar distances (LD) of Earth today. 2017 PV25 is inbound from 8.74 to 7.66 LD.

Earth passage I D ~Size Distance Today  Notes
5.50 LD Aug. 222017 PV25 39 m  7.66 from 8.74 LD DOU
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 1710 UTC with follow-up in today's DOU MPEC for 2017 PV25.



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 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 18 August '17

The MPC's NEO Confirmation Page has 102 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 102 objects listed. Of these, 58 were "one nighters." So far The Tracking News has counted a total of 140 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 18 August '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 23 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-Q45 - "23:17 UT" - 2015 PN307


MPEC 2017-Q44 - "22:39 UT" - 2017 QM


MPEC 2017-Q43 - "22:35 UT" - 2017 PY26


MPEC 2017-Q42 - "22:31 UT" - 2017 QS


MPEC 2017-Q41 - "22:28 UT" - 2017 QR


MPEC 2017-Q40 - "22:24 UT" - 2017 QQ


MPEC 2017-Q39 - "22:21 UT" - 2017 QP


MPEC 2017-Q38 - "22:18 UT" - 2017 QO


MPEC 2017-Q37 - "22:12 UT" - 2017 QN


MPEC 2017-Q36 - "22:08 UT" - 2017 QL


MPEC 2017-Q35 - "22:05 UT" - 2017 QK


MPEC 2017-Q34 - "22:01 UT" - 2017 PC27


MPEC 2017-Q33 - "21:58 UT" - 2017 PB27


MPEC 2017-Q32 - "21:54 UT" - 2017 PA27


MPEC 2017-Q31 - "21:50 UT" - 2017 PZ26


MPEC 2017-Q30 - "21:46 UT" - 2017 PX26


MPEC 2017-Q29 - "21:42 UT" - 2017 PW26


MPEC 2017-Q28 - "21:39 UT" - 2017 PV26


MPEC 2017-Q27 - "14:50 UT" - 2012 QP17


MPEC 2017-Q26 - "14:48 UT" - 2017 AN19


<< DOU on 18 Aug. '17 >>  MPEC 2017-Q25 - "12:04 UT" - Daily Orbit Update


MPEC 2017-Q24 - "10:50 UT" - 2017 AY3


MPEC 2017-Q23 - "01:49 UT" - 1999 AF4

Observers  on 18 August '17

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2017-Q25, 2017-Q31, 2017-Q32, 2017-Q34, 2017-Q35, 2017-Q37, 2017-Q43, 2017-Q44 & 2017-Q45 -- 2017 QN, 2017 QM, 2017 QK, 2017 PZ26, 2017 PY26, 2017 PC27, 2017 PA27, 2017 OT18, 2017 OO19, 2017 NT6, 2017 MX2, 2017 MG3, 2017 KT34, 2015 PN307, 2015 FO124, 2014 YC15, 2004 QD20, 496018, 265962, 142561, 142464, 4197, 3288
T05ATLAS Haleakala in Hawaii, 15 in MPEC 2017-Q25 -- 2017 OF7, 2017 OD1, 2014 YC15, 96631, 68348, 496018, 39796, 190166, 141874, 138846, 12538, 11398, 7336, 5143, 1917
T08ATLAS Mauna Loa in Hawaii, 2 in MPECs 2017-Q25 & 2017-Q43 -- 2017 PY26, 456651
C77Bernezzo Obs. in Italy, 2 in MPECs 2017-Q25 & 2017-Q43 -- 2017 PY26, 2017 PV25
Z84Calar Alto Schmidt in Spain, 2 in MPECs 2017-Q37 & 2017-Q43 -- 2017 QN, 2017 PY26
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2017-Q25 -- 3200
160Castelmartini Obs. in Italy, 8 in MPECs 2017-Q25 & 2017-Q43 -- 2017 PY26, 2017 PL26, 68348, 496018, 495848, 190166, 142040, 12538
107Cavezzo Obs. in Italy, 1 in MPEC 2017-Q43 -- 2017 PY26
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2017-Q25, 2017-Q26, 2017-Q28, 2017-Q29, 2017-Q35, 2017-Q36, 2017-Q37, 2017-Q39 & 2017-Q42 -- 2017 QS, 2017 QP, 2017 QN, 2017 QL, 2017 QK, 2017 PW26, 2017 PV26, 2017 PJ26, 2017 AN19
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 9 in MPECs 2017-Q23, 2017-Q25, 2017-Q27, 2017-Q30, 2017-Q31, 2017-Q35, 2017-Q38, 2017-Q40 & 2017-Q41 -- 2017 QR, 2017 QQ, 2017 QO, 2017 QK, 2017 PZ26, 2017 PX26, 2017 OF1, 2012 QP17, 1999 AF4
006Fabra Obs. in Spain, 2 in MPEC 2017-Q25 -- 90075, 6053
J95Great Shefford Obs. in England, 1 in MPEC 2017-Q43 -- 2017 PY26
H15ISON New Mexico Obs. in New Mexico, 3 in MPEC 2017-Q25 -- 2014 YC15, 5143, 3288
W19Kalamazoo Obs. in Michigan, 1 in MPEC 2017-Q25 -- 90075
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-Q28 -- 2017 PV26
V37LCOGT Fort Davis in Texas, 2 in MPECs 2017-Q32 & 2017-Q33 -- 2017 PB27, 2017 PA27
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-Q34 -- 2017 PC27
H01Magdalena Ridge Obs. (MRO) in New Mexico, 10 in MPECs 2017-Q29, 2017-Q30, 2017-Q32, 2017-Q33, 2017-Q34, 2017-Q36, 2017-Q37, 2017-Q39, 2017-Q42 & 2017-Q43 -- 2017 QS, 2017 QP, 2017 QN, 2017 QL, 2017 PY26, 2017 PX26, 2017 PW26, 2017 PC27, 2017 PB27, 2017 PA27
568_Marco Micheli on Mauna Kea in Hawaii, 14 in MPECs 2017-Q29, 2017-Q30, 2017-Q31, 2017-Q32, 2017-Q33, 2017-Q34, 2017-Q35, 2017-Q36, 2017-Q37, 2017-Q38, 2017-Q39, 2017-Q40, 2017-Q41 & 2017-Q44 -- 2017 QR, 2017 QQ, 2017 QP, 2017 QO, 2017 QN, 2017 QM, 2017 QL, 2017 QK, 2017 PZ26, 2017 PX26, 2017 PW26, 2017 PC27, 2017 PB27, 2017 PA27
108Montelupo Obs. in Italy, 4 in MPEC 2017-Q25 -- 96631, 142561, 7336, 5143
C23Olmen Obs. in Belgium, 1 in MPEC 2017-Q25 -- 190166
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2017-Q25 -- 2014 QL433
F51Pan-STARRS 1 (PS1) in Hawaii, 41 in MPECs 2017-Q23, 2017-Q24, 2017-Q25, 2017-Q28, 2017-Q29, 2017-Q30, 2017-Q31, 2017-Q32, 2017-Q33, 2017-Q34, 2017-Q35, 2017-Q36, 2017-Q37, 2017-Q38, 2017-Q39, 2017-Q40, 2017-Q41, 2017-Q42 & 2017-Q44 -- 2017 QS, 2017 QR, 2017 QQ, 2017 QP, 2017 QO, 2017 QN, 2017 QM, 2017 QL, 2017 QK, 2017 QB, 2017 PZ26, 2017 PX26, 2017 PW26, 2017 PV26, 2017 PS25, 2017 PC27, 2017 PB27, 2017 PA27, 2017 OX67, 2017 OQ68, 2017 OD1, 2017 NS6, 2017 AY3, 2015 RT83, 2015 QE9, 2015 PC228, 2012 FH38, 2011 WV134, 2008 AZ110, 1999 AF4, 85867, 495959, 397326, 376707, 23548, 221787, 216115, 159699, 152685, 141874, 100756
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2017-Q32 & 2017-Q41 -- 2017 QR, 2017 PA27
K80Platanus Obs., 1 in MPEC 2017-Q25 -- 2017 PL26
W98Polonia Obs. in Chile, 1 in MPEC 2017-Q25 -- 2017 OD1
A48Povegliano Veronese Obs. in Italy, 1 in MPEC 2017-Q25 -- 2017 PT25
104San Marcello Pistoiese Obs. in Italy, 6 in MPECs 2017-Q31, 2017-Q32, 2017-Q34, 2017-Q35, 2017-Q40 & 2017-Q43 -- 2017 QQ, 2017 QK, 2017 PZ26, 2017 PY26, 2017 PC27, 2017 PA27
033Schwarzschild Obs. in Germany, 3 in MPECs 2017-Q33, 2017-Q34 & 2017-Q43 -- 2017 PY26, 2017 PC27, 2017 PB27
K14Sencelles Obs. in Spain, 1 in MPEC 2017-Q25 -- 2017 OT18
587Sormano Obs. in Italy, 2 in MPECs 2017-Q32 & 2017-Q43 -- 2017 PY26, 2017 PA27
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2017-Q25, 2017-Q32, 2017-Q33 & 2017-Q35 -- 2017 QK, 2017 PB27, 2017 PA27, 2017 OP19, 2015 QE9
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2017-Q25, 2017-Q26, 2017-Q33, 2017-Q38 & 2017-Q40 -- 2017 QQ, 2017 QO, 2017 PB27, 2017 OH68, 2017 AN19, 2007 RU10
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-Q25 -- 422699, 265962
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2017-Q25 -- 2017 HK1, 469219
L01Visnjan Obs., 5 in MPECs 2017-Q25, 2017-Q32, 2017-Q34, 2017-Q35 & 2017-Q43 -- 2017 QK, 2017 PY26, 2017 PC27, 2017 PA27, 1999 AF4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 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 PV26JPL Sentry23582048-204811.889e-06-3.72-3.720JPL: Computed at 16:47 today Pacific time based on 13 observations spanning 11.795 days (2017-Aug-05.56722 to 2017-Aug-17.36271). Diameter approximately 0.190 km. from weighted mean H=21.31.
2017 PL26NEODyS16002076-21171244.5e-06-4.21-4.840NEODyS: "Based on 90 optical observations (of which 3 are rejected as outliers) from 2017-08-13.402 to 2017-08-17.847."
JPL Sentry15092083-2114542.58453682e-05-3.58-4.370JPL: Computed at 08:00 today Pacific time based on 90 observations spanning 4.4453 days (2017-Aug-13.40074 to 2017-Aug-17.84603). Diameter approximately 0.120 km. from weighted mean H=22.17.

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 18 August '17

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

2358Noted that JPL Sentry has posted 2017 PV26 as an impact risk - see above
2324Grabbed MPEC 2017-Q43 - 2017 PY26 - see above
Grabbed MPEC 2017-Q44 - 2017 QM - see above
Grabbed MPEC 2017-Q45 - 2015 PN307 - see above
2233Grabbed MPEC 2017-Q28 - 2017 PV26 - see above
Grabbed MPEC 2017-Q29 - 2017 PW26 - see above
Grabbed MPEC 2017-Q30 - 2017 PX26 - see above
Grabbed MPEC 2017-Q31 - 2017 PZ26 - see above
Grabbed MPEC 2017-Q32 - 2017 PA27 - see above
Grabbed MPEC 2017-Q33 - 2017 PB27 - see above
Grabbed MPEC 2017-Q34 - 2017 PC27 - see above
Grabbed MPEC 2017-Q35 - 2017 QK - see above
Grabbed MPEC 2017-Q36 - 2017 QL - see above
Grabbed MPEC 2017-Q37 - 2017 QN - see above
Grabbed MPEC 2017-Q38 - 2017 QO - see above
Grabbed MPEC 2017-Q39 - 2017 QP - see above
Grabbed MPEC 2017-Q40 - 2017 QQ - see above
Grabbed MPEC 2017-Q41 - 2017 QR - see above
Grabbed MPEC 2017-Q42 - 2017 QS - see above
1710Generated Traffic Report
1600Noted that NEODyS has posted 2017 PL26 as an impact risk - see above
1509Noted that JPL Sentry has updated its 2017 PL26 risk assessment - see above
Grabbed MPEC 2017-Q24 - 2017 AY3 - see above
Grabbed MPEC 2017-Q25 - Daily Orbit Update - see above
Grabbed MPEC 2017-Q26 - 2017 AN19 - see above
Grabbed MPEC 2017-Q27 - 2012 QP17 - see above
0321Grabbed MPEC 2017-Q23 - 1999 AF4 - see above