Contents  on 24 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 24 August '17

Five objects reported inside ten LD

Five asteroidal objects are reported to be within ten lunar distances (LD) of Earth today. Nearest is risk-listed 2017 QF3, which comes its closest to the Moon on this passage, reaching 1.10 LD at 0618 UTC on its way out of our planet's sphere of gravitational influence (SOI).

Earth passage I D ~Size Distance Today  Notes
1.44 LD yesterday2017 QF3 8 m  1.45 to 3.30 LD risk, exits Earth SOI, Moon closest 1.10 LD at 0618 UTC
2.59 LD Aug. 222017 QT1 15 m  6.27 to 10.65 LD risk, exits ten LD
3.52 LD Aug. 222017 QS16 31 m  4.47 to 5.70 LD risk
5.50 LD Aug. 222017 PV25 40 m  5.82 to 6.44 LD DOU
9.10 LD tomorrow2017 QJ2 21 m  9.11 from 10.35 LD enters ten LD
Approaching (sorted by 10-LD bubble entry date)
5.47 LD Aug. 302017 QN1 16 m  < 10 LD Aug. 26
4.82 LD Aug. 312017 QQ1 37 m  < 10 LD Aug. 27
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 1846 UTC with the discovery of already departed 2017 QZ16 (MPEC), which flew past at 6.75 LD on August 5th, and with follow-up for 2017 PV25 and departed 2017 QW1 in today's DOU MPEC plus first follow-up for departed objects 2017 QQ16 and 2017 QP16.



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 24 August '17

The MPC's NEO Confirmation Page has 70 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 70 objects listed. Of these, 39 were "one nighters." So far The Tracking News has counted a total of 89 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 24 August '17

Minor Planet Electronic Circulars

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


MPEC 2017-Q113 - "15:26 UT" - 2017 QF17


MPEC 2017-Q112 - "15:22 UT" - 2017 QE17


MPEC 2017-Q111 - "15:19 UT" - 2017 QD17


MPEC 2017-Q110 - "15:16 UT" - 2017 QC17


MPEC 2017-Q109 - "15:13 UT" - 2017 QB17


MPEC 2017-Q108 - "15:10 UT" - 2017 QA17


MPEC 2017-Q107 - "15:06 UT" - 2017 QZ16


MPEC 2017-Q106 - "15:03 UT" - 2017 QY16


MPEC 2017-Q105 - "15:00 UT" - 2017 OX68


<< DOU on 24 Aug. '17 >>  MPEC 2017-Q104 - "12:04 UT" - Daily Orbit Update


MPEC 2017-Q103 - "02:09 UT" - 2011 EB7

Observers  on 24 August '17

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2017-Q104, 2017-Q106, 2017-Q108, 2017-Q109 & 2017-Q111 -- 2017 QY16, 2017 QR16, 2017 QQ16, 2017 QP16, 2017 QO16, 2017 QD17, 2017 QB17, 2017 QA17, 2017 OB20, 2017 MV4, 2017 MG3, 2009 SP171
T05ATLAS Haleakala in Hawaii, 6 in MPEC 2017-Q104 -- 2017 PT25, 2017 PL26, 68950, 294739, 153415, 6053
T08ATLAS Mauna Loa in Hawaii, 11 in MPEC 2017-Q104 -- 2017 PS25, 2017 OD1, 2014 YC15, 2012 FH38, 96631, 142561, 7336, 5143, 3288, 1980, 1917
160Castelmartini Obs. in Italy, 10 in MPEC 2017-Q104 -- 2017 PV25, 2008 MH1, 68348, 66146, 416584, 322763, 237805, 141670, 12538, 6053
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2017-Q110 & 2017-Q111 -- 2017 QD17, 2017 QC17
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2017-Q109 & 2017-Q110 -- 2017 QC17, 2017 QB17
151Eschenberg Obs. in Switzerland, 5 in MPEC 2017-Q104 -- 2017 QB, 2017 FE1, 2014 YC15, 2014 QL433, 2012 FH38
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-Q104 -- 2017 QP2
K88GINOP-KHK in Hungary, 1 in MPEC 2017-Q112 -- 2017 QE17
W19Kalamazoo Obs. in Michigan, 2 in MPEC 2017-Q104 -- 422699, 6053
246KLENOT in the Czech Republic, 11 in MPECs 2017-Q104 & 2017-Q112 -- 2017 QX1, 2017 QE17, 2017 QB, 2017 PV25, 2017 PU25, 2017 PT25, 2017 PS25, 2017 PL26, 2017 PF, 2017 OT18, 2017 NL6
Z43Landehen Obs., 1 in MPEC 2017-Q104 -- 190166
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-Q104 -- 341816
568_Marco Micheli on Mauna Kea in Hawaii, 10 in MPECs 2017-Q104, 2017-Q105, 2017-Q106, 2017-Q107, 2017-Q108, 2017-Q110, 2017-Q111 & 2017-Q112 -- 2017 QZ16, 2017 QY16, 2017 QP16, 2017 QO16, 2017 QL2, 2017 QE17, 2017 QD17, 2017 QC17, 2017 QA17, 2017 OX68
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2017-Q104 -- 2002 TD58
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-Q104 -- 2017 PL26
Z80Northolt Branch Obs. in England, 2 in MPEC 2017-Q104 -- 2017 PT25, 2017 PL26
F51Pan-STARRS 1 (PS1) in Hawaii, 19 in MPECs 2017-Q103, 2017-Q104, 2017-Q105, 2017-Q106, 2017-Q107, 2017-Q108, 2017-Q109, 2017-Q110, 2017-Q111, 2017-Q112 & 2017-Q113 -- 2017 QZ16, 2017 QY16, 2017 QL2, 2017 QF17, 2017 QE17, 2017 QD17, 2017 QC17, 2017 QB17, 2017 QA17, 2017 PS25, 2017 PL26, 2017 OX68, 2017 NK, 2017 MY2, 2011 EB7, 470310, 385580, 222073, 163250
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2017-Q104 -- 2017 PL26
122Pises Obs. in France, 2 in MPEC 2017-Q104 -- 2016 AA9, 2004 TQ13
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2017-Q103 -- 2011 EB7
D29Purple Mtn. Obs. Xuyi Station in China, 9 in MPEC 2017-Q104 -- 2017 LU, 2014 YC15, 2014 QL390, 2004 TQ13, 495891, 410622, 367525, 338176, 3288
071Rhozen Obs. in Bulgaria, 1 in MPEC 2017-Q104 -- 2329
L04ROASTERR-1 in Romania, 1 in MPEC 2017-Q104 -- 2017 PL26
H36Sandlot Obs. in Kansas, 2 in MPECs 2017-Q104 & 2017-Q113 -- 2017 QW1, 2017 QF17
033Schwarzschild Obs. in Germany, 2 in MPECs 2017-Q104 & 2017-Q111 -- 2017 QD17, 2017 QC3
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-Q104 -- 2012 QB17
K41Vegaquattro Obs. in Italy, 3 in MPEC 2017-Q104 -- 2017 PS25, 2003 QW30, 265962
C51WISE in Earth polar orbit, 1 in MPEC 2017-Q104 -- 20086
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 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 PL26NEODyS18402081-2117602.08e-05-3.69-4.060NEODyS: "Based on 167 optical observations (of which 7 are rejected as outliers) from 2017-06-21.528 to 2017-08-24.220."
JPL Sentry15052081-2116402.478202e-05-3.61-4.040JPL: Computed at 08:00 today Pacific time based on 165 observations spanning 63.692 days (2017-Jun-21.52716 to 2017-Aug-24.21949). Diameter approximately 0.120 km. from weighted mean H=22.25.

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 24 August '17

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

1846Generated Traffic Report
1840Noted that NEODyS has updated its 2017 PL26 risk assessment - see above
1601Grabbed MPEC 2017-Q107 - 2017 QZ16 - see above
Grabbed MPEC 2017-Q108 - 2017 QA17 - see above
Grabbed MPEC 2017-Q109 - 2017 QB17 - see above
Grabbed MPEC 2017-Q110 - 2017 QC17 - see above
Grabbed MPEC 2017-Q111 - 2017 QD17 - see above
Grabbed MPEC 2017-Q112 - 2017 QE17 - see above
Grabbed MPEC 2017-Q113 - 2017 QF17 - see above
1505Noted that JPL Sentry has updated its 2017 PL26 risk assessment - see above
Grabbed MPEC 2017-Q104 - Daily Orbit Update - see above
Grabbed MPEC 2017-Q105 - 2017 OX68 - see above
Grabbed MPEC 2017-Q106 - 2017 QY16 - see above
0402Grabbed MPEC 2017-Q103 - 2011 EB7 - see above