Contents  on 24 May '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 24 May '17

Three objects reported inside ten LD

Three asteroids are reported to be less than ten lunar distances (LD) from Earth today, including newly announced 2017 KW4, inbound from 6.19 to 4.32 LD, and 2017 KY4, outbound from 7.40 to 9.38 LD, while 2017 HU49 continues its slow retreat, moving from 7.33 to 7.59 LD. Coming into the neighborhood next, radar target 2017 CS arrives inside ten LD on May 26th.

This report was generated at 1906 UTC with new discoveries 2017 KY4 (MPEC) and 2017 KW4 (MPEC), and with the recovery of distant 2008 NP3 in today's DOU MPEC along with first follow-up for departed 2017 KZ2 as well as continuing follow-up for 2017 CS, departed radar target 2014 JO25, and distant NHATS target 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 24 May '17

The MPC's NEO Confirmation Page has 47 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 47 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 92 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 24 May '17

Minor Planet Electronic Circulars

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


MPEC 2017-K51 - "19:27 UT" - 2015 XP129


MPEC 2017-K50 - "15:48 UT" - 2017 KW4


MPEC 2017-K49 - "15:45 UT" - 2017 KT4


MPEC 2017-K48 - "15:41 UT" - 2017 KS4


MPEC 2017-K47 - "15:38 UT" - 2017 KA5


MPEC 2017-K46 - "15:35 UT" - 2017 KZ4


MPEC 2017-K45 - "15:32 UT" - 2017 KY4


MPEC 2017-K44 - "15:29 UT" - 2017 KX4


MPEC 2017-K43 - "15:26 UT" - 2017 KV4


MPEC 2017-K42 - "15:23 UT" - 2017 KU4


MPEC 2017-K41 - "15:20 UT" - 2017 KR4


MPEC 2017-K40 - "15:16 UT" - 2017 KQ4


MPEC 2017-K39 - "15:13 UT" - 2017 KP4


MPEC 2017-K38 - "15:10 UT" - 2017 KO4


MPEC 2017-K37 - "15:06 UT" - 2017 KN4


<< DOU on 24 May '17 >>  MPEC 2017-K36 - "12:14 UT" - Daily Orbit Update


MPEC 2017-K35 - "03:42 UT" - Comet C/2017 K2 (Panstarrs)


MPEC 2017-K34 - "03:18 UT" - Comet C/2017 K1 (Panstarrs)

Observers  on 24 May '17

A total of 46 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 5 in MPECs 2017-K36, 2017-K41, 2017-K42, 2017-K44 & 2017-K48 -- 2017 KZ2, 2017 KX4, 2017 KU4, 2017 KS4, 2017 KR4
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-K50 -- 2017 KW4
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2017-K37, 2017-K41 & 2017-K48 -- 2017 KS4, 2017 KR4, 2017 KN4
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-K36 -- 1036
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-K45 -- 2017 KY4
B20Carmelita Obs. in Spain, 1 in MPEC 2017-K49 -- 2017 KT4
160Castelmartini Obs. in Italy, 3 in MPECs 2017-K36, 2017-K45 & 2017-K50 -- 2017 KY4, 2017 KW4, 163348
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2017-K36, 2017-K45 & 2017-K50 -- 2017 KY4, 2017 KW4, 2017 JL3, 2017 HW48, 2017 GQ6, 2014 KF91, 2013 CL118, 2005 GL9, 2004 JR, 484517, 484402, 467460, 339492, 242191, 11398
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2017-K49 -- 2017 KT4
958Dax Obs. in France, 2 in MPECs 2017-K45 & 2017-K50 -- 2017 KY4, 2017 KW4
J27El Guijo Obs. in Spain, 2 in MPEC 2017-K36 -- 163696, 2329
Z64El Miron del Cielo Obs. in Spain, 1 in MPEC 2017-K36 -- 143404
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 7 in MPECs 2017-K36, 2017-K44, 2017-K45, 2017-K49, 2017-K50 & 2017-K51 -- 2017 KY4, 2017 KX4, 2017 KW4, 2017 KT4, 2017 KB3, 2015 XP129, 2010 EK12
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2017-K49 & 2017-K50 -- 2017 KW4, 2017 KT4
203GiaGa Obs. in Italy, 1 in MPEC 2017-K49 -- 2017 KT4
J95Great Shefford Obs. in England, 6 in MPECs 2017-K35, 2017-K41, 2017-K44, 2017-K45, 2017-K48 & 2017-K50 -- 2017 KY4, 2017 KX4, 2017 KW4, 2017 KS4, 2017 KR4, C/2017 K2
511Haute Provence Obs. in Germany, 2 in MPECs 2017-K36 & 2017-K45 -- 2017 KY4, 100926
U695Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-K35 -- C/2017 K2
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-K34 -- C/2017 K1
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-K43 -- 2017 KV4
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-K38 -- 2017 KO4
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-K36 -- 2017 CS
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2017-K46, 2017-K47 & 2017-K50 -- 2017 KZ4, 2017 KW4, 2017 KA5
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-K36 -- 4957
568_Marco Micheli on Mauna Kea in Hawaii, 8 in MPECs 2017-K34, 2017-K35, 2017-K37, 2017-K38, 2017-K39, 2017-K46, 2017-K47 & 2017-K49 -- 2017 KZ4, 2017 KT4, 2017 KP4, 2017 KO4, 2017 KN4, 2017 KA5, C/2017 K2, C/2017 K1
152Moletai Obs. in Lithuania, 2 in MPEC 2017-K36 -- 162998, 143678
474Mt. John Obs. in New Zealand, 10 in MPECs 2017-K36, 2017-K40, 2017-K43, 2017-K46 & 2017-K47 -- 2017 KZ4, 2017 KV4, 2017 KQ4, 2017 KJ3, 2017 KF3, 2017 KB3, 2017 KA5, 2017 JC3, 2017 HW1, 2017 HV4
G96Mt. Lemmon Survey (MLS) in Arizona, 25 in MPECs 2017-K36, 2017-K41, 2017-K42, 2017-K44, 2017-K45 & 2017-K48 -- 2017 KY4, 2017 KX4, 2017 KU4, 2017 KS4, 2017 KR4, 2017 KJ3, 2017 KE3, 2017 KD3, 2017 JU1, 2017 HY50, 2017 GQ4, 2016 WO1, 2016 JH12, 2014 JO25, 2014 JG78, 2013 JM7, 2013 BR45, 2011 KR12, 2005 MO13, 2005 GL9, 489900, 276468, 136923, 7341, 1917
J69North Obs. in England, 2 in MPECs 2017-K45 & 2017-K50 -- 2017 KY4, 2017 KW4
Z80Northolt Branch Obs. in England, 2 in MPECs 2017-K36 & 2017-K45 -- 2017 KY4, 2017 CS
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2017-K34, 2017-K35, 2017-K36, 2017-K37, 2017-K38, 2017-K39, 2017-K40, 2017-K42, 2017-K43, 2017-K46, 2017-K47 & 2017-K49 -- 2017 KZ4, 2017 KV4, 2017 KU4, 2017 KT4, 2017 KQ4, 2017 KP4, 2017 KO4, 2017 KN4, 2017 KA5, C/2017 K2, C/2017 K1, 2017 DS35, 66400
K63Pascoli Obs. in Italy, 2 in MPECs 2017-K45 & 2017-K50 -- 2017 KY4, 2017 KW4
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2017-K36 -- 2017 GQ6
L04ROASTERR-1 in Romania, 1 in MPEC 2017-K45 -- 2017 KY4
104San Marcello Pistoiese Obs. in Italy, 7 in MPECs 2017-K41, 2017-K42, 2017-K44, 2017-K45, 2017-K48, 2017-K49 & 2017-K50 -- 2017 KY4, 2017 KX4, 2017 KW4, 2017 KU4, 2017 KT4, 2017 KS4, 2017 KR4
H36Sandlot Obs. in Kansas, 2 in MPECs 2017-K41 & 2017-K50 -- 2017 KW4, 2017 KR4
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-K36 -- 106589
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-K36 -- 2016 LJ49
587Sormano Obs. in Italy, 1 in MPEC 2017-K41 -- 2017 KR4
691Spacewatch 0.9m telescope in Arizona, 12 in MPECs 2017-K34, 2017-K36, 2017-K37, 2017-K38, 2017-K39, 2017-K43 & 2017-K46 -- 2017 KZ4, 2017 KV4, 2017 KP4, 2017 KO4, 2017 KN4, 2017 KJ3, 2017 KA3, C/2017 K1, 2017 HD49, 2017 FP64, 2017 FE90, 467460
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2017-K36, 2017-K37 & 2017-K40 -- 2017 KQ4, 2017 KN4, 2017 GM7, 2017 FR2, 2017 FE1, 2016 SG1, 2008 NP3, 154590
I93St. Pardon de Conques Obs. in France, 6 in MPECs 2017-K41, 2017-K44, 2017-K45, 2017-K48, 2017-K49 & 2017-K50 -- 2017 KY4, 2017 KX4, 2017 KW4, 2017 KT4, 2017 KS4, 2017 KR4
I52Steward Obs. Mt. Lemmon Station in Arizona, 15 in MPECs 2017-K36, 2017-K37, 2017-K38, 2017-K39, 2017-K40, 2017-K41, 2017-K42, 2017-K43, 2017-K44, 2017-K45, 2017-K46, 2017-K47, 2017-K48, 2017-K49 & 2017-K50 -- 2017 KZ4, 2017 KY4, 2017 KX4, 2017 KW4, 2017 KV4, 2017 KU4, 2017 KT4, 2017 KS4, 2017 KR4, 2017 KQ4, 2017 KP4, 2017 KO4, 2017 KN4, 2017 KA5, 467460
926Tenagra II Obs. in Arizona, 18 in MPECs 2017-K36, 2017-K37, 2017-K38, 2017-K39, 2017-K40, 2017-K41, 2017-K42, 2017-K43, 2017-K44, 2017-K45, 2017-K46, 2017-K47, 2017-K48, 2017-K49 & 2017-K50 -- 2017 KZ4, 2017 KY4, 2017 KX4, 2017 KW4, 2017 KV4, 2017 KU4, 2017 KT4, 2017 KS4, 2017 KR4, 2017 KQ4, 2017 KP4, 2017 KO4, 2017 KN4, 2017 KD3, 2017 KC3, 2017 KA5, 2017 JV2, 2017 CS
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2017-K36 -- 474425
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2017-K36 -- 2008 XW2, 1997 QK1, 471240
C51WISE in Earth polar orbit, 4 in MPEC 2017-K36 -- 2011 JU2, 488803, 21088, 2102
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 May '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 KB3JPL Sentry15502063-2115461.70142621e-05-4.92-5.370JPL: Computed at 08:05 today Pacific time based on 24 observations spanning 6.8470 days (2017-May-17.21791 to 2017-May-24.064918). Diameter approximately 0.036 km. from weighted mean H=24.89.
NEODyS15502063-2117412.24e-06-5.80-6.610NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2017-05-17.219 to 2017-05-23.230."
2017 HZ4NEODyS15502091-2115171.74e-05-5.54-5.580NEODyS: "Based on 45 optical observations (of which 1 are rejected as outliers) from 2017-04-26.445 to 2017-05-22.927."

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 24 May '17

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

2103Grabbed MPEC 2017-K51 - 2015 XP129 - see above
1906Generated Traffic Report
1550Noted that NEODyS has updated its 2017 HZ4 risk assessment - see above
Noted that JPL Sentry has updated its 2017 KB3 risk assessment - see above
Noted that NEODyS has updated its 2017 KB3 risk assessment - see above
Grabbed MPEC 2017-K36 - Daily Orbit Update - see above
Grabbed MPEC 2017-K37 - 2017 KN4 - see above
Grabbed MPEC 2017-K38 - 2017 KO4 - see above
Grabbed MPEC 2017-K39 - 2017 KP4 - see above
Grabbed MPEC 2017-K40 - 2017 KQ4 - see above
Grabbed MPEC 2017-K41 - 2017 KR4 - see above
Grabbed MPEC 2017-K42 - 2017 KU4 - see above
Grabbed MPEC 2017-K43 - 2017 KV4 - see above
Grabbed MPEC 2017-K44 - 2017 KX4 - see above
Grabbed MPEC 2017-K45 - 2017 KY4 - see above
Grabbed MPEC 2017-K46 - 2017 KZ4 - see above
Grabbed MPEC 2017-K47 - 2017 KA5 - see above
Grabbed MPEC 2017-K48 - 2017 KS4 - see above
Grabbed MPEC 2017-K49 - 2017 KT4 - see above
Grabbed MPEC 2017-K50 - 2017 KW4 - see above
0501Grabbed MPEC 2017-K35 - Comet C/2017 K2 (Panstarrs) - see above
0336Grabbed MPEC 2017-K34 - Comet C/2017 K1 (Panstarrs) - see above