Contents  on 28 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 28 August '17

Five objects reported inside ten LD

There are five transient natural objects known to be less than ten lunar distances (LD) from Earth today. Nearest are 2017 QN1, moving in from 7.27 to 5.98 LD, and newly announced 2017 QG18, inbound from 8.16 to 6.95 LD.

Earth passage I D ~Size Distance Today  Notes
1.02 LD Aug. 262017 QQ17 8 m  8.70 to 13.44 LD exits ten LD, Moon buzzer
4.36 LD Sept. 12017 QG18 13 m  6.95 from 8.16 LD NEW - MPEC
4.82 LD Aug. 312017 QQ1 37 m  7.98 from 9.89 LD
5.47 LD Aug. 302017 QN1 16 m  5.98 from 7.27 LD
5.50 LD Aug. 222017 PV25 40 m  9.46 to 10.67 LD exits ten 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 updated at 1924 UTC with the discovery of 2017 QG18 (MPEC). Your first neighborhood asteroids traffic report was generated at 1552 UTC.



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 28 August '17

The MPC's NEO Confirmation Page has 64 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 64 objects listed. Of these, 33 were "one nighters." So far The Tracking News has counted a total of 84 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 28 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-Q140 - "16:22 UT" - 2017 QN18


MPEC 2017-Q139 - "16:18 UT" - 2017 QM18


MPEC 2017-Q138 - "16:15 UT" - 2017 QL18


MPEC 2017-Q137 - "16:12 UT" - 2017 QK18


MPEC 2017-Q136 - "16:09 UT" - 2017 QJ18


MPEC 2017-Q135 - "16:05 UT" - 2017 QH18


MPEC 2017-Q134 - "16:02 UT" - 2017 QG18


MPEC 2017-Q133 - "15:58 UT" - 2017 QF18


MPEC 2017-Q132 - "15:55 UT" - 2017 QE18


<< DOU on 28 Aug. '17 >>  MPEC 2017-Q131 - "12:03 UT" - Daily Orbit Update


MPEC 2017-Q130 - "01:49 UT" - 2004 TB10

Observers  on 28 August '17

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-Q140 -- 2017 QN18
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPECs 2017-Q131, 2017-Q132, 2017-Q135, 2017-Q136, 2017-Q137, 2017-Q138 & 2017-Q139 -- 2017 QY2, 2017 QR16, 2017 QM18, 2017 QL18, 2017 QK18, 2017 QJ18, 2017 QH18, 2017 QE18, 2017 PS24, 2017 OY67, 2017 OW18, 2017 MG3, 2017 FE3, 2016 TE93, 2010 VD72, 374188, 29075, 17188
T05ATLAS Haleakala in Hawaii, 6 in MPEC 2017-Q131 -- 2010 MW, 68950, 422699, 294739, 219021, 153415
T08ATLAS Mauna Loa in Hawaii, 4 in MPECs 2017-Q131 & 2017-Q140 -- 2017 QN18, 2014 YC15, 2013 RE21, 2012 FH38
G37Discovery Channel Telescope in Arizona, 1 in MPEC 2017-Q134 -- 2017 QG18
734Farpoint Obs. in Kansas, 3 in MPECs 2017-Q132, 2017-Q136 & 2017-Q140 -- 2017 QN18, 2017 QJ18, 2017 QE18
157Frasso Sabino Obs. in Italy, 1 in MPEC 2017-Q131 -- 2017 OT18
J95Great Shefford Obs. in England, 5 in MPECs 2017-Q132, 2017-Q133, 2017-Q134, 2017-Q139 & 2017-Q140 -- 2017 QN18, 2017 QM18, 2017 QG18, 2017 QF18, 2017 QE18
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-Q140 -- 2017 QN18
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2017-Q132, 2017-Q135, 2017-Q139 & 2017-Q140 -- 2017 QN18, 2017 QM18, 2017 QH18, 2017 QE18
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-Q132, 2017-Q133 & 2017-Q139 -- 2017 QM18, 2017 QF18, 2017 QE18
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2017-Q131 -- 2017 QR17
F51Pan-STARRS 1 (PS1) in Hawaii, 9 in MPECs 2017-Q132, 2017-Q133, 2017-Q134, 2017-Q135, 2017-Q136, 2017-Q137, 2017-Q138, 2017-Q139 & 2017-Q140 -- 2017 QN18, 2017 QM18, 2017 QL18, 2017 QK18, 2017 QJ18, 2017 QH18, 2017 QG18, 2017 QF18, 2017 QE18
Z38Picoto Obs., 1 in MPEC 2017-Q131 -- 2017 PL26
D29Purple Mtn. Obs. Xuyi Station in China, 10 in MPECs 2017-Q131 & 2017-Q138 -- 2017 QS17, 2017 QR, 2017 QL18, 2014 QL433, 2002 RP28, 20826, 162566, 142561, 138911, 5786
W25RMS Obs., 1 in MPEC 2017-Q138 -- 2017 QL18
L04ROASTERR-1 in Romania, 1 in MPEC 2017-Q131 -- 2017 PT25
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2017-Q132, 2017-Q134, 2017-Q135 & 2017-Q139 -- 2017 QM18, 2017 QH18, 2017 QG18, 2017 QE18
H36Sandlot Obs. in Kansas, 2 in MPECs 2017-Q132 & 2017-Q139 -- 2017 QM18, 2017 QE18
193Sanglok Obs. in Tajikistan, 1 in MPEC 2017-Q131 -- 190166
033Schwarzschild Obs. in Germany, 7 in MPECs 2017-Q131, 2017-Q132, 2017-Q134, 2017-Q135, 2017-Q136, 2017-Q138 & 2017-Q139 -- 2017 QU17, 2017 QM18, 2017 QL18, 2017 QJ18, 2017 QH18, 2017 QG18, 2017 QE18
Y28Sertao de Itaparica Obs. in Brazil, 1 in MPEC 2017-Q131 -- 2017 PV26
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-Q131 -- 3122
I52Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2017-Q132, 2017-Q135, 2017-Q136, 2017-Q137 & 2017-Q138 -- 2017 QL18, 2017 QK18, 2017 QJ18, 2017 QH18, 2017 QE18
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 2 in MPECs 2017-Q130 & 2017-Q134 -- 2017 QG18, 2004 TB10
L01Visnjan Obs., 1 in MPEC 2017-Q135 -- 2017 QH18
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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 Sentry15432048-204811.178e-09-6.92-6.920JPL: Computed at 07:47 today Pacific time based on 23 observations spanning 22.582 days (2017-Aug-05.56722 to 2017-Aug-28.148763). Diameter approximately 0.190 km. from weighted mean H=21.30.
NEODyS1543204811.41e-07-4.86-4.860NEODyS: "Based on 25 optical observations (of which 3 are rejected as outliers) from 2017-08-05.568 to 2017-08-28.150."
2017 PL26JPL Sentry15432081-2116246.624622e-06-4.19-4.500JPL: Computed at 07:57 today Pacific time based on 175 observations spanning 67.483 days (2017-Jun-21.52716 to 2017-Aug-28.01061). Diameter approximately 0.120 km. from weighted mean H=22.25.
NEODyS15432081-2116313.75e-06-4.43-4.660NEODyS: "Based on 177 optical observations (of which 7 are rejected as outliers) from 2017-06-21.528 to 2017-08-28.011."

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 28 August '17

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

1924Updated Traffic Report
1634Grabbed MPEC 2017-Q132 - 2017 QE18 - see above
Grabbed MPEC 2017-Q133 - 2017 QF18 - see above
Grabbed MPEC 2017-Q134 - 2017 QG18 - see above
Grabbed MPEC 2017-Q135 - 2017 QH18 - see above
Grabbed MPEC 2017-Q136 - 2017 QJ18 - see above
Grabbed MPEC 2017-Q137 - 2017 QK18 - see above
Grabbed MPEC 2017-Q138 - 2017 QL18 - see above
Grabbed MPEC 2017-Q139 - 2017 QM18 - see above
Grabbed MPEC 2017-Q140 - 2017 QN18 - see above
1543Noted that JPL Sentry has updated its 2017 PL26 risk assessment - see above
Noted that NEODyS has updated its 2017 PL26 risk assessment - see above
Noted that JPL Sentry has updated its 2017 PV26 risk assessment - see above
Noted that NEODyS has updated its 2017 PV26 risk assessment - see above
Grabbed MPEC 2017-Q131 - Daily Orbit Update - see above
0335Grabbed MPEC 2017-Q130 - 2004 TB10 - see above