Contents  on 28 June '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 June '17

Four objects reported inside ten LD

Four asteroids are known to be traveling within ten lunar distances (LD) of Earth today. Nearest is 2017 MA3, which moves out from 3.53 to 4.76 LD.

Earth passage I D ~Size Distance Today  Notes
2.52 LD June 302017 MC1 42 m  5.54 from 7.95 LD
3.23 LD yesterday2017 MA3 15 m  3.53 to 4.76 LD DOU
4.99 LD June 302017 MB3 30 m  5.56 from 6.33 LD DOU
5.38 LD July 32017 ME4 19 m  8.80 from 10.04 LD NEW, enters ten LD - MPEC
Approaching
3.12 LD July 232017 BS5 51 m  < 10 LD July 16, NHATS target
6.50 LD July 22017 MC3 50 m  < 10 LD June 30 - DOU
7.6   LD July 112017 MC4 147 m  < 10 LD July 9, NEW, uncertainty +/- 37 mins. - MPEC

This report was generated at 1840 UTC with two discoveries, both showing in the active traffic table above -- one entering our ten-LD traffic reporting "bubble" today and the other arriving on July 11th. Today's DOU MPEC has follow-up for three objects in the table and for departed radar targets 2017 CS and 441987 2010 NY65 plus distant 484402 2007 XH16.



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. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently so close. 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 June '17

The MPC's NEO Confirmation Page has 79 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 79 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 87 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 June '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-M85 - "22:32 UT" - 2014 NW64


MPEC 2017-M84 - "15:42 UT" - 2016 FT3


<< DOU on 28 June '17 >>  MPEC 2017-M83 - "12:00 UT" - Daily Orbit Update


MPEC 2017-M82 - "02:34 UT" - 2017 MY3


MPEC 2017-M81 - "02:31 UT" - 2017 MG4


MPEC 2017-M80 - "02:28 UT" - 2017 MF4


MPEC 2017-M79 - "02:25 UT" - 2017 ME4


MPEC 2017-M78 - "02:22 UT" - 2017 MD4


MPEC 2017-M77 - "02:19 UT" - 2017 MC4


MPEC 2017-M76 - "02:11 UT" - 2017 MB4


MPEC 2017-M75 - "02:07 UT" - 2017 MA4


MPEC 2017-M74 - "02:04 UT" - 2017 MZ3

Observers  on 28 June '17

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2017-M74, 2017-M75, 2017-M76, 2017-M78, 2017-M80, 2017-M81, 2017-M83 & 2017-M84 -- 2017 MZ3, 2017 MG4, 2017 MF4, 2017 MD4, 2017 MB4, 2017 MA4, 2017 GQ6, 2017 CS, 2016 FT3, 2015 OX78, 66391, 494706, 368565, 285838, 190166, 154302, 11398, 6063, 5879, 2102
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-M83 -- 142040
T08ATLAS Mauna Loa in Hawaii, 26 in MPEC 2017-M83 -- 2017 MC3, 2017 MB3, 2011 ED78, 2007 MT20, 2007 ML6, 68950, 54789, 495331, 494706, 484517, 484402, 456651, 39796, 329774, 232368, 20460, 163696, 136818, 12538, 11398, 100926, 7888, 6063, 4954, 2102, 1917
703Catalina Sky Survey (CSS) in Arizona, 24 in MPEC 2017-M83 -- 2017 MC3, 2017 LU, 2011 ED78, 2007 MT20, 85709, 52762, 488465, 485652, 483560, 420302, 405427, 39796, 294739, 190166, 163696, 162186, 154007, 141670, 100926, 5660, 4197, 3752, 3352, 1917
G37Discovery Channel Telescope in Arizona, 1 in MPEC 2017-M79 -- 2017 ME4
006Fabra Obs. in Spain, 3 in MPEC 2017-M83 -- 190166, 11398, 2102
734Farpoint Obs. in Kansas, 1 in MPEC 2017-M75 -- 2017 MA4
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-M81 -- 2017 MG4
K88GINOP-KHK in Hungary, 2 in MPECs 2017-M77 & 2017-M81 -- 2017 MG4, 2017 MC4
246KLENOT in the Czech Republic, 1 in MPEC 2017-M81 -- 2017 MG4
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-M74, 2017-M75 & 2017-M76 -- 2017 MZ3, 2017 MB4, 2017 MA4
G96Mt. Lemmon Survey (MLS) in Arizona, 17 in MPECs 2017-M77, 2017-M78, 2017-M79, 2017-M81 & 2017-M83 -- 2017 MW2, 2017 MG4, 2017 ME4, 2017 MD4, 2017 MD3, 2017 MC4, 2017 FJ90, 2017 BM31, 2016 CL32, 2010 NG1, 495417, 484402, 441987, 265962, 136582, 7336, 5332
C23Olmen Obs. in Belgium, 1 in MPEC 2017-M83 -- 190166
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2017-M74, 2017-M75, 2017-M76, 2017-M79, 2017-M80, 2017-M81, 2017-M82 & 2017-M85 -- 2017 MZ3, 2017 MY3, 2017 MG4, 2017 MF4, 2017 ME4, 2017 MB4, 2017 MA4, 2014 NW64
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 16 in MPEC 2017-M83 -- 2017 MC, 2017 MB1, 2017 MA, 2017 HW48, 2017 GQ6, 2017 CS, 2011 ED78, 2007 MT20, 2007 ML6, 2003 MT, 441987, 100926, 6063, 2102, 1980, 1917
L04ROASTERR-1 in Romania, 1 in MPEC 2017-M83 -- 190166
204Schiaparelli Obs. in Italy, 5 in MPEC 2017-M83 -- 2017 MJ, 2017 MC3, 2017 MB3, 2017 MA3, 2017 BM31
Y00SONEAR in Brazil, 2 in MPEC 2017-M83 -- 441987, 20460
691Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2017-M82 & 2017-M83 -- 2017 MY3, 2017 MX2, 2017 MW2, 2017 MV2, 2017 MF4, 2017 MC3, 2017 MB1, 2017 LP1, 2017 LA
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2017-M82 & 2017-M83 -- 2017 MY3, 2017 FP64
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-M83 -- 4341
I52Steward Obs. Mt. Lemmon Station in Arizona, 10 in MPECs 2017-M74, 2017-M75, 2017-M76, 2017-M77, 2017-M78, 2017-M79, 2017-M80, 2017-M81, 2017-M83 & 2017-M85 -- 2017 MZ3, 2017 MG4, 2017 MF4, 2017 ME4, 2017 MD4, 2017 MC4, 2017 MB4, 2017 MA4, 2014 NW64, 68347
I42Westport Obs. in Massachusetts, 1 in MPEC 2017-M83 -- 2017 MC
C51WISE in Earth polar orbit, 5 in MPEC 2017-M83 -- 2014 NF3, 2013 LB1, 495323, 456651, 226554
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 June '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 MZ3NEODyS14222029-2116692.21e-05-2.68-2.820NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2017-06-22.507 to 2017-06-27.353."
JPL Sentry04452029-2115773.10906891e-05-2.54-2.800JPL: Computed at 21:09 June 27th Pacific time based on 16 observations spanning 4.8458 days (2017-Jun-22.50604 to 2017-Jun-27.3518). Diameter approximately 0.120 km. from weighted mean H=22.20.
2017 MB1NEODyS15312082-211732.34e-10-6.58-6.690NEODyS #2 for the day: "Based on 98 optical observations (of which 0 are rejected as outliers) from 2017-06-19.315 to 2017-06-28.410."
JPL Sentry15002082-211774.1879e-08-4.19-4.410JPL: Computed at 07:52 today Pacific time based on 98 observations spanning 9.0946 days (2017-Jun-19.31418 to 2017-Jun-28.40878). Diameter approximately 0.627 km. from weighted mean H=18.66.

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 June '17

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

2235Grabbed MPEC 2017-M85 - 2014 NW64 - see above
1840Generated Traffic Report
1600Grabbed MPEC 2017-M84 - 2016 FT3 - see above
1531Noted that NEODyS has updated its 2017 MB1 risk assessment - see above
1500Noted that JPL Sentry has updated its 2017 MB1 risk assessment - see above
1422Noted that NEODyS has updated its 2017 MB1 risk assessment - see above
Noted that NEODyS has posted 2017 MZ3 as an impact risk - see above
Grabbed MPEC 2017-M83 - Daily Orbit Update - see above
0445Noted that JPL Sentry has posted 2017 MZ3 as an impact risk - see above
0325Grabbed MPEC 2017-M76 - 2017 MB4 - see above
Grabbed MPEC 2017-M77 - 2017 MC4 - see above
Grabbed MPEC 2017-M78 - 2017 MD4 - see above
Grabbed MPEC 2017-M79 - 2017 ME4 - see above
Grabbed MPEC 2017-M80 - 2017 MF4 - see above
Grabbed MPEC 2017-M81 - 2017 MG4 - see above
Grabbed MPEC 2017-M82 - 2017 MY3 - see above
0216Grabbed MPEC 2017-M74 - 2017 MZ3 - see above
Grabbed MPEC 2017-M75 - 2017 MA4 - see above