2017-06-30 Tracking News

Contents on 30 June '17

Traffic Report -- five objects
IAU Minor Planet Center
- NEOCP Activity -- 70 listings
- New MPECs -- one MPEC
Observers -- seven observers
Impact Risk Monitoring -- three objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 782 risk-listed objects, 29 have had news in the last 31 days. Updated at 1601 UTC on 30 June.
Ephemerides for risk-listed objects & close passers
News archive (old) & news image catalog (discontinued)
Object Links - mainly for radar targets & close passers (mostly discontinued)
Observing Campaigns (old)

The latest A/CC news is available via framed access, 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 30 June '17

Five objects reported inside ten LD

There are five minor objects reported inside ten lunar distances (LD) of Earth today. Nearest is 2017 MC1, which comes its closest to our planet on this passage, reaching 2.52 LD at 2124 UTC.

Earth passage	I D	~Size	Distance Today	Notes

2.52 LD today	2017 MC1	42 m	2.52 LD	Earth closest at 2124 UTC
3.23 LD June 27	2017 MA3	15 m	6.45 to 8.31 LD
4.99 LD today	2017 MB3	29 m	4.99 LD	Earth closest at 1641 UTC - DOU

5.38 LD July 3	2017 ME4	19 m	6.67 from 7.66 LD
6.51 LD July 2	2017 MC3	52 m	8.75 from 10.96 LD	enters ten LD - DOU
Approaching
3.12 LD July 23	2017 BS5	51 m	< 10 LD July 16, NHATS target
7.6 LD July 11	2017 MC4	147 m	< 10 LD July 9, uncertainty +/- 37 mins.

This report was generated at 1753 UTC with follow-up in today's DOU MPEC for two objects in the active traffic table here, and for departed 2017 MD, as well as astrometry from early June for radar target 2017 CS.

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 30 June '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, eighteen were "one nighters." So far The Tracking News has counted a total of 72 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 30 June '17

Minor Planet Electronic Circulars

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

<< DOU on 30 June '17 >> MPEC 2017-M96 - "12:00 UT" - Daily Orbit Update

Observations of risk-listed objects
K17M03Z 2017 MZ3 (small asteroid, arc=8 days, H=22.2 ~123m) from the Spacewatch 1.8m telescope (June 30.34-35p3)
K17M03Y 2017 MY3 (Q=5.934 AU, arc=8 days, H=19.1 ~513m) from the Spacewatch 0.9m telescope (June 29.43-45p3 at R=21.8-22.1)
K17M01B 2017 MB1 (Q=4.137 AU, arc=11 days, H=18.7 ~616m) from Spacewatch 0.9m (June 29.41-43p3 & 30.38-40p3)
Observations of close-passing objects
K17M03C 2017 MC3 (arc=7 days, H=24.2 ~49m) from Spacewatch 0.9m (June 30.18-19p2)
K17M03B 2017 MB3 (arc=7 days, H=25.4 ~28m) from the Catalina Sky Survey (CSS) (June 30.30-31p2)
K17M00D 2017 MD (arc=10 days, H=24.4 ~45m) from Astronomical Research Obs. Westfield (June 27.26-28p2)
K17C00S 2017 CS (Q=4.199 AU, arc=159 days, H=19.8 ~371m, radar support) from ARO Westfield (June 10.26-27p5)
Observation campaigns (NHATS targets, radar support)
K15FC4O 2015 FO124 (arc=2 opp, H=21.1 ~204m, NHATS) from Spacewatch 0.9m (June 29.41-43p3)
J0166 190166 2005 UP156 (radar) from ARO Westfield (May 13.25p6 & June 10.20-21p5)
11398 11398 1998 YP11 (radar) from ARO Westfield (May 14.21-22p7)
06063 6063 Jason (1984 KB) (radar) from ARO Westfield (June 10.14-15p5)
-- NHATS target table & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K17M00Z 2017 MZ (arc=10 days, H=22.6 ~102m) from ARO Westfield (June 27.29-31p3)
K17M00K 2017 MK (arc=8 days, H=25.3 ~29m) from ARO Westfield (June 27.20-21p2)
K17M00J 2017 MJ (arc=31 days, H=22.2 ~123m) from ARO Westfield (June 27.18-19p4)
K17L00W 2017 LW (arc=35 days, H=25.5 ~27m) from ARO Westfield (June 20.25-26p4)
K17H04V 2017 HV4 (arc=65 days, H=24.2 ~49m) from Spacewatch 0.9m (June 29.40-42p3)
K14Qd0L 2014 QL390 (arc=3 opp, H=22.1 ~129m) from UH/Tholen NEO Follow-Up CFH Telescope (June 25.55-56p3)
Observations of other objects
K17M04W 2017 MW4 (arc=8 days, H=20.0 ~339m) from Spacewatch 0.9m (June 30.43-44p3)
K17M04A 2017 MA4 (arc=7 days, H=18.5 ~676m) from Spacewatch 0.9m (June 30.18-21p3)
K17M02V 2017 MV2 (arc=9 days, H=20.6 ~257m) from Spacewatch 0.9m (June 30.24-29p3)
K17M00A 2017 MA (arc=71 days, H=21.7 ~155m) from ARO Westfield (June 27.14-16p3)
K17H03N 2017 HN3 (arc=67 days, H=21.6 ~162m) from ARO Westfield (June 20.23p4 & 27.32-33p3)
K17G06Q 2017 GQ6 (arc=84 days, H=18.9 ~562m) from ARO Westfield (June 27.36-37p5)
K17B31M 2017 BM31 (arc=154 days, H=20.6 ~257m) from ARO Westfield (June 27.13p3), ATLAS Mauna Loa (June 29.30-33p4), and CSS (June 30.23-25p4)
K14L14U 2014 LU14 (arc=3 opp, H=19.6 ~407m) from Spacewatch 1.8m (June 30.41-44p3)
K13U09H 2013 UH9 (Q=4.122 AU, arc=4 opp, H=18.6 ~645m) from ARO Westfield (June 28.28-31p3 at V=21.7-22.1)
K07X16J 2007 XJ16 (arc=3 opp, H=18.6 ~645m) from M. Kumrucu-Lohmiller via Slooh.com Chile Obs. (June 29.12p2)
n4706 494706 2005 GL9 from ARO Westfield (June 10.11-12p5)
j6651 456651 2007 RT19 from CSS (June 30.25-27p4)
f3563 413563 2005 TG45 from CSS (June 30.45p4)
a5246 365246 2009 NE from ARO Westfield (June 28.19-22p3 at V=22.0-22.1)
X3908 333908 1999 TN12 from ATLAS Mauna Loa (June 29.44-45p4)
X2408 332408 2007 MM13 from ARO Westfield (June 27.34-35p5), ATLAS Mauna Loa (June 29.50-52p4), and CSS (June 30.36-38p4)
W9774 329774 2004 LE from ATLAS Mauna Loa (June 29.47-51p4)
S5838 285838 2001 FA1 from ARO Westfield (June 28.24-28p3 at V=21.8-22.1)
O4670 244670 2003 KN18 from ARO Westfield (June 28.31-34p3 at V=21.7-22.1)
M2073 222073 1999 HY1 from ATLAS Mauna Loa (June 29.35-39p4)
G2120 162120 1998 SH36 from ARO Westfield (June 28.35-37p3 at V=21.9-22.1)
E2561 142561 2002 TX68 from ARO Westfield (May 14.31p3)
E2040 142040 2002 QE15 from ARO Westfield (June 10.24-25p4)
D8925 138925 2001 AU43 from ATLAS Mauna Loa (June 29.58-61p4)
66391 66391 1999 KW4 from ATLAS Mauna Loa (June 29.30-33p4) and CSS (June 30.21-23p4)
53430 53430 1999 TY16 from CSS (June 30.34-36p4)
07888 7888 1993 UC from ARO Westfield (May 14.26-27p3)
01980 1980 Tezcatlipoca (1950 LA) from ARO Westfield (June 10.17-18p6)

Observers on 30 June '17

Seven observers appear in today's MPEC.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 24 in MPEC 2017-M96 -- 2017 MZ, 2017 MK, 2017 MJ, 2017 MD, 2017 MA, 2017 LW, 2017 HN3, 2017 GQ6, 2017 CS, 2017 BM31, 2013 UH9, 494706, 365246, 332408, 285838, 244670, 190166, 162120, 142561, 142040, 11398, 7888, 6063, 1980
`T08`	ATLAS Mauna Loa in Hawaii, 7 in MPEC 2017-M96 -- 2017 BM31, 66391, 333908, 332408, 329774, 222073, 138925
`703`	Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2017-M96 -- 2017 MB3, 2017 BM31, 66391, 53430, 456651, 413563, 332408
`W885`	M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-M96 -- 2007 XJ16
`691`	Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2017-M96 -- 2017 MY3, 2017 MW4, 2017 MV2, 2017 MC3, 2017 MB1, 2017 MA4, 2017 HV4, 2015 FO124
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2017-M96 -- 2017 MZ3, 2014 LU14
`T14`	UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2017-M96 -- 2014 QL390

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 30 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 MZ3	NEODyS	1600	2029-2116	36	5.55e-06	-3.72	-3.94	0	NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2017-06-22.507 to 2017-06-30.349."
2017 MZ3	JPL Sentry	1531	2029-2116	27	8.8767955e-06	-3.36	-3.59	0	JPL: Computed at 08:04 today Pacific time based on 19 observations spanning 7.8419 days (2017-Jun-22.50604 to 2017-Jun-30.34795). Diameter approximately 0.120 km. from weighted mean H=22.26.

2017 MY3	NEODyS	1600	2066	1	1.15e-10	-7.46	-7.46	0	NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2017-06-21.563 to 2017-06-29.452."

2017 MB1	NEODyS	1600	2089-2094	2	1.74e-09	-5.59	-5.7	0	NEODyS: "Based on 106 optical observations (of which 1 are rejected as outliers) from 2017-06-19.315 to 2017-06-30.401."
2017 MB1	JPL Sentry	1531	2082-2117	5	7.8923e-08	-3.96	-4.25	0	JPL: Computed at 07:51 today Pacific time based on 106 observations spanning 11.086 days (2017-Jun-19.31418 to 2017-Jun-30.40005). Diameter approximately 0.625 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 30 June '17

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

1753	Generated Traffic Report
1600	Noted that NEODyS has updated its 2017 MB1 risk assessment - see above Noted that NEODyS has posted 2017 MY3 as an impact risk - see above Noted that NEODyS has updated its 2017 MZ3 risk assessment - see above
1531	Noted that JPL Sentry has updated its 2017 MB1 risk assessment - see above Noted that JPL Sentry has updated its 2017 MZ3 risk assessment - see above
1401	Grabbed MPEC 2017-M96 - Daily Orbit Update - see above

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