Contents  on 4 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 4 August '17

Two objects reported inside ten LD

Two asteroids are known to be traveling within ten lunar distances (LD) of our home world today. 2017 NB7 is inbound from 7.57 to 7.09 LD and risk-listed 2017 OE7 departs our ten-LD traffic reporting "bubble," moving out from 9.81 to 10.74 LD.

This report was generated at 1852 UTC with the discovery of already departed 2017 OZ67 (MPEC), which barely entered the bubble, flying by at about 9.6 LD on July 11th, and with follow-up in today's DOU MPEC for 2017 OE7.



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 4 August '17

The MPC's NEO Confirmation Page has 54 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 54 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 80 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 4 August '17

Minor Planet Electronic Circulars

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


MPEC 2017-P23 - "14:47 UT" - 2017 PG


MPEC 2017-P22 - "14:45 UT" - 2017 PF


MPEC 2017-P21 - "14:42 UT" - 2017 PE


MPEC 2017-P20 - "14:39 UT" - 2017 OB68


MPEC 2017-P19 - "14:36 UT" - 2017 OA68


MPEC 2017-P18 - "14:33 UT" - 2017 OZ67


MPEC 2017-P17 - "14:30 UT" - 2017 OY67


MPEC 2017-P16 - "14:27 UT" - 2017 OX67


MPEC 2017-P15 - "14:23 UT" - 2017 OW67


MPEC 2017-P14 - "14:19 UT" - 2017 OV67


MPEC 2017-P13 - "14:16 UT" - 2017 OU67


<< DOU on 4 Aug. '17 >>  MPEC 2017-P12 - "12:03 UT" - Daily Orbit Update

Observers  on 4 August '17

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2017-P12, 2017-P14, 2017-P15, 2017-P19, 2017-P21, 2017-P22 & 2017-P23 -- 2017 PG, 2017 PF, 2017 PE, 2017 OW67, 2017 OV67, 2017 OA68, 2015 CN62
T05ATLAS Haleakala in Hawaii, 8 in MPEC 2017-P12 -- 2017 OE7, 495959, 485652, 366733, 237805, 138925, 137799, 4954
T08ATLAS Mauna Loa in Hawaii, 3 in MPEC 2017-P12 -- 2008 MH1, 2006 KA40, 162186
160Castelmartini Obs. in Italy, 2 in MPEC 2017-P12 -- 2017 OG1, 2017 GQ6
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-P12 -- 2015 CN62
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2017-P12, 2017-P13, 2017-P17, 2017-P19, 2017-P20, 2017-P21, 2017-P22 & 2017-P23 -- 2017 PG, 2017 PF, 2017 PE, 2017 OY67, 2017 OU67, 2017 OB68, 2017 OA68, 2017 GO7
006Fabra Obs. in Spain, 1 in MPEC 2017-P12 -- 138925
734Farpoint Obs. in Kansas, 2 in MPECs 2017-P22 & 2017-P23 -- 2017 PG, 2017 PF
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-P23 -- 2017 PG
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-P12 -- 333478
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-P12 -- 2015 CN62
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 2 in MPEC 2017-P12 -- 232368, 142561
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-P22 -- 2017 PF
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-P16 -- 2017 OX67
699LONEOS in Arizona, 1 in MPEC 2017-P12 -- 2015 CN62
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2017-P13 -- 2017 OU67
568_Marco Micheli on Mauna Kea in Hawaii, 7 in MPECs 2017-P13, 2017-P14, 2017-P15, 2017-P16, 2017-P17, 2017-P18 & 2017-P20 -- 2017 OZ67, 2017 OY67, 2017 OX67, 2017 OW67, 2017 OV67, 2017 OU67, 2017 OB68
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2017-P12 -- 2015 CN62
F51Pan-STARRS 1 (PS1) in Hawaii, 26 in MPECs 2017-P12, 2017-P13, 2017-P14, 2017-P15, 2017-P16, 2017-P17, 2017-P18, 2017-P19, 2017-P20, 2017-P21, 2017-P22 & 2017-P23 -- 2017 PG, 2017 PF, 2017 PE, 2017 OZ67, 2017 OY67, 2017 OX67, 2017 OW67, 2017 OV67, 2017 OU67, 2017 OB68, 2017 OA68, 2017 HV4, 2015 CN62, 2014 NF63, 2013 QH48, 2013 NZ23, 2012 FH38, 2008 CA6, 2003 SJ154, 96744, 438017, 367525, 338176, 281375, 15817, 4197
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2017-P12 -- 2015 CN62
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-P12 -- 2017 OT18
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-P12 -- 2017 OD1
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-P12 -- 138925
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 4 in MPECs 2017-P14, 2017-P15, 2017-P16 & 2017-P18 -- 2017 OZ67, 2017 OX67, 2017 OW67, 2017 OV67
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 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 Sentry16092114-211416.267e-05-5.35-5.350JPL: Computed at 07:59 today Pacific time based on 48 observations spanning 5.1126 days (2017-Jul-24.48536 to 2017-Jul-29.59797). Diameter approximately 0.018 km. from weighted mean H=26.34.
NEODyS1609211415.07e-05-5.33-5.330NEODyS: "Based on 49 optical observations (of which 8 are rejected as outliers) from 2017-07-24.486 to 2017-07-29.599."

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 4 August '17

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

1852Generated Traffic Report
1609Noted that JPL Sentry has updated its 2017 OE7 risk assessment - see above
Noted that NEODyS has updated its 2017 OE7 risk assessment - see above
Grabbed MPEC 2017-P12 - Daily Orbit Update - see above
Grabbed MPEC 2017-P13 - 2017 OU67 - see above
Grabbed MPEC 2017-P14 - 2017 OV67 - see above
Grabbed MPEC 2017-P15 - 2017 OW67 - see above
Grabbed MPEC 2017-P16 - 2017 OX67 - see above
Grabbed MPEC 2017-P17 - 2017 OY67 - see above
Grabbed MPEC 2017-P18 - 2017 OZ67 - see above
Grabbed MPEC 2017-P19 - 2017 OA68 - see above
Grabbed MPEC 2017-P20 - 2017 OB68 - see above
Grabbed MPEC 2017-P21 - 2017 PE - see above
Grabbed MPEC 2017-P22 - 2017 PF - see above
Grabbed MPEC 2017-P23 - 2017 PG - see above