Contents  on 2 July '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 2 July '17

Four objects reported inside ten LD

Today four asteroids are known to be less than ten lunar distances (LD) from our home world. Nearest is 2017 MC1, moving away from 3.83 to 6.04 LD, and two of the others will end the day slightly closer: 2017 ME4 inbound at 5.46 LD and 2017 MB3 outbound at 6.00 LD.

Earth passage I D ~Size Distance Today  Notes
2.52 LD June 302017 MC1 42 m  3.83 to 6.04 LD
4.99 LD June 302017 MB3 29 m  5.34 to 6.00 LD
5.39 LD tomorrow2017 ME4 19 m  5.46 from 5.91 LD
6.51 LD today2017 MC3 54 m  6.51 LD Earth closest at 2331 UTC - DOU
Approaching
3.12 LD July 232017 BS5 51 m  < 10 LD July 16, NHATS target
7.62 LD July 112017 MC4 147 m  < 10 LD July 9 - DOU

This report was generated at 1848 UTC with the recovery announced yesterday of distant 2007 MB4 (MPEC), and with follow-up in today's DOU MPEC for two active objects in the traffic table above and for departed objects 2017 MZ2 and radar target 441987 2010 NY65, plus astrometry from March 2016 for 2016 CS247 and risk-listed 2016 FV13.

Advisory:  Beginning tomorrow and for an extended period, news updates on this Web site will be fewer than usual and more irregular in timing. All discoveries and observing credits will be preserved but we will probably miss some NEOCP counts and interim impact risk assessments, plus there may be days when we won't have sufficient Internet access to gather the data needed to do these traffic reports.



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 now so closeee also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 2 July '17

The MPC's NEO Confirmation Page has 28 listings

When last checked at 2300 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 28 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 56 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 2 July '17

Minor Planet Electronic Circulars

As of last check at 2300 UTC, there have been fifteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-N43 - "22:29 UT" - 2017 NB


MPEC 2017-N42 - "21:50 UT" - 2017 MU8


MPEC 2017-N41 - "21:47 UT" - 2017 MT8


MPEC 2017-N40 - "21:43 UT" - 2017 MR8


MPEC 2017-N39 - "21:40 UT" - 2017 MS8


MPEC 2017-N38 - "21:36 UT" - 2017 MO8


MPEC 2017-N37 - "21:33 UT" - 2017 MQ8


MPEC 2017-N36 - "21:30 UT" - 2017 MP8


MPEC 2017-N35 - "21:26 UT" - 2017 MN8


MPEC 2017-N34 - "21:23 UT" - 2017 MM8


MPEC 2017-N33 - "21:20 UT" - 2017 ML8


MPEC 2017-N32 - "21:16 UT" - 2017 MK8


MPEC 2017-N31 - "21:12 UT" - 2017 MJ8


MPEC 2017-N30 - "15:06 UT" - 2015 XR128


<< DOU on 2 July '17 >>  MPEC 2017-N29 - "12:11 UT" - Daily Orbit Update

Observers  on 2 July '17

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2017-N29, 2017-N30, 2017-N32, 2017-N36, 2017-N38, 2017-N39 & 2017-N42 -- 2017 MZ2, 2017 MY4, 2017 MU8, 2017 MS8, 2017 MP8, 2017 MO8, 2017 MK8, 2017 LW, 2017 LC, 2017 LA, 2017 KL3, 2016 YU8, 2015 XR128, 66391, 368565, 190166, 11398
T08ATLAS Mauna Loa in Hawaii, 11 in MPEC 2017-N29 -- 2017 MC4, 2017 MB5, 2017 MB1, 2011 ED78, 96631, 68348, 265962, 6063, 5143, 3288, 1980
I47Auger Obs. in Argentina, 1 in MPEC 2017-N29 -- 2017 HN49
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-N43 -- 2017 NB
160Castelmartini Obs. in Italy, 1 in MPEC 2017-N43 -- 2017 NB
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2017-N29 & 2017-N43 -- 2017 NB, 2017 MB1, 2008 MH1, 2007 ML6, 96631, 68348, 441987, 385580, 20460, 190166, 7888, 6053, 5332, 4341
107Cavezzo Obs. in Italy, 1 in MPEC 2017-N43 -- 2017 NB
309*program code "*" (19) via Cerro Paranal in Chile, 19 in MPEC 2017-N29 -- 2016 LS9, 2013 EK28, 2013 BF18, 2012 KY41, 2011 VH5, 2004 PS92, 2004 MB6, 65803, 54071, 477051, 362310, 355256, 276703, 243298, 19764, 136993, 9202, 5370, 2329
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 21 in MPECs 2017-N29, 2017-N31, 2017-N33, 2017-N35, 2017-N37 & 2017-N39 -- 2017 MU7, 2017 MS8, 2017 MQ8, 2017 MP7, 2017 MN8, 2017 ML8, 2017 ML7, 2017 MK7, 2017 MJ8, 2017 MJ7, 2017 MG7, 2017 ME7, 2017 MD7, 2017 MC7, 2017 MA4, 2017 KV4, 2017 KR34, 2017 KO4, 2017 KO31, 2017 JU2, 2017 HK49
W845Lori Allen via DECam in Chile, 19 in MPEC 2017-N29 -- 2016 FV13, 2016 FD1, 2016 EC85, 2016 CS247, 2011 QC46, 2009 NA, 2007 VG189, 2007 MT20, 2006 PA1, 2005 EW169, 2003 PC11, 461397, 457260, 405562, 243298, 159459, 143381, 138524, 4015
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-N43 -- 2017 NB
157Frasso Sabino Obs. in Italy, 2 in MPEC 2017-N29 -- 2017 MC, 2017 MB1
J95Great Shefford Obs. in England, 1 in MPEC 2017-N43 -- 2017 NB
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-N37 -- 2017 MQ8
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-N37 -- 2017 MQ8
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-N29 -- 4953
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2017-N31 -- 2017 MJ8
474Mt. John Obs. in New Zealand, 2 in MPECs 2017-N31 & 2017-N33 -- 2017 ML8, 2017 MJ8
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2017-N29, 2017-N36, 2017-N37, 2017-N38, 2017-N39, 2017-N40, 2017-N41 & 2017-N42 -- 2017 MU8, 2017 MT8, 2017 MS8, 2017 MR8, 2017 MQ8, 2017 MP8, 2017 MO8, 2013 RE21, 2008 NU, 2007 LC15, 416584, 232368, 111253, 105140, 2329
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2017-N29 -- 6063, 1980
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2017-N29, 2017-N31, 2017-N32, 2017-N33, 2017-N34 & 2017-N35 -- 2017 MN8, 2017 MM8, 2017 ML8, 2017 MK8, 2017 MJ8, 2007 ML6, 162120
W25RMS Obs., 2 in MPECs 2017-N36 & 2017-N38 -- 2017 MP8, 2017 MO8
H36Sandlot Obs. in Kansas, 4 in MPECs 2017-N36, 2017-N40, 2017-N41 & 2017-N42 -- 2017 MU8, 2017 MT8, 2017 MR8, 2017 MP8
204Schiaparelli Obs. in Italy, 3 in MPECs 2017-N36, 2017-N38 & 2017-N42 -- 2017 MU8, 2017 MP8, 2017 MO8
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-N29 -- 141018
Y00SONEAR in Brazil, 1 in MPEC 2017-N43 -- 2017 NB
691Spacewatch 0.9m telescope in Arizona, 16 in MPECs 2017-N29 & 2017-N40 -- 2017 MX2, 2017 MW2, 2017 MV2, 2017 MR8, 2017 ME3, 2017 ME1, 2017 MD3, 2017 MC3, 2017 LU, 2017 HV4, 2017 GM7, 2015 FO124, 2014 NE64, 2010 VK188, 2010 VB1, 437841
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2017-N29 & 2017-N34 -- 2017 MM8, 2017 MM, 2017 MG7, 2017 MC7, 2017 MA4, 2017 KP4, 2017 FP64, 2017 FJ90, 2016 JJ17, 2014 LU14, 2009 OO9
I52Steward Obs. Mt. Lemmon Station in Arizona, 20 in MPECs 2017-N29, 2017-N36, 2017-N37, 2017-N38, 2017-N39, 2017-N40, 2017-N41, 2017-N42 & 2017-N43 -- 2017 NB, 2017 MZ, 2017 MV4, 2017 MU8, 2017 MT8, 2017 MS8, 2017 MS7, 2017 MR8, 2017 MR7, 2017 MQ8, 2017 MP8, 2017 MO8, 2017 MO7, 2017 MG7, 2017 ME7, 2017 ME3, 2017 MC3, 2017 MA5, 2017 KY34, 68347
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 4 in MPECs 2017-N32, 2017-N33, 2017-N34 & 2017-N35 -- 2017 MN8, 2017 MM8, 2017 ML8, 2017 MK8
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 July '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2300 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 MH7NEODyS1430209013.58e-10-7.70-7.70NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2017-06-24.509 to 2017-06-30.444."
2017 MY3NEODyS1430R E M O V E D-
2017 MB1NEODyS23002094-211749.12e-09-4.88-4.920NEODyS #2 for the day: "Based on 125 optical observations (of which 1 are rejected as outliers) from 2017-06-19.315 to 2017-07-02.332."
JPL Sentry16002082-208211.957e-09-5.46-5.460JPL: Computed at 07:53 today Pacific time based on 124 observations spanning 13.017 days (2017-Jun-19.31418 to 2017-Jul-02.33161). Diameter approximately 0.640 km. from weighted mean H=18.63.
2016 FV13NEODyS23002114-211722.81e-05-5.31-5.310NEODyS: "Based on 102 optical observations (of which 0 are rejected as outliers) from 2016-03-28.006 to 2016-09-29.155."
JPL Sentry16002114-211412.532e-05-5.34-5.340JPL: Computed at 07:57 today Pacific time based on 102 observations spanning 185.15 days (2016-Mar-28.00485 to 2016-Sep-29.154252). Diameter approximately 0.022 km. from weighted mean H=25.91.

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 2 July '17

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

2300Noted that NEODyS has updated its 2016 FV13 risk assessment - see above
Noted that NEODyS has updated its 2017 MB1 risk assessment - see above
Grabbed MPEC 2017-N43 - 2017 NB - see above
2202Grabbed MPEC 2017-N38 - 2017 MO8 - see above
Grabbed MPEC 2017-N39 - 2017 MS8 - see above
Grabbed MPEC 2017-N40 - 2017 MR8 - see above
Grabbed MPEC 2017-N41 - 2017 MT8 - see above
Grabbed MPEC 2017-N42 - 2017 MU8 - see above
2144Grabbed MPEC 2017-N37 - 2017 MQ8 - see above
2134Grabbed MPEC 2017-N31 - 2017 MJ8 - see above
Grabbed MPEC 2017-N32 - 2017 MK8 - see above
Grabbed MPEC 2017-N33 - 2017 ML8 - see above
Grabbed MPEC 2017-N34 - 2017 MM8 - see above
Grabbed MPEC 2017-N35 - 2017 MN8 - see above
Grabbed MPEC 2017-N36 - 2017 MP8 - see above
1848Generated Traffic Report
1600Noted that JPL Sentry has updated its 2016 FV13 risk assessment - see above
Noted that JPL Sentry has updated its 2017 MB1 risk assessment - see above
Grabbed MPEC 2017-N30 - 2015 XR128 - see above
1430Noted that NEODyS has updated its 2017 MB1 risk assessment - see above
Noted that NEODyS has posted 2017 MH7 as an impact risk - see above
Noted that NEODyS has removed 2017 MY3 as an impact risk - see above
Grabbed MPEC 2017-N29 - Daily Orbit Update - see above