Contents  on 30 May '19

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 30 May '19

Eight objects reported inside ten LD

Eight small celestial objects are reported within ten lunar distances (LD) of our home world today. Nearest is newly announced 2019 KG2, which comes its closest to Earth this time around, reaching 2.65 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.85 LD May 28 2019 KT 16 m  4.85 to 7.42 LD May 24 - June 1 intruder, risk
2.65 LD today 2019 KG2 23 m  2.65 LD May 27 - June 3 NEW, Earth closest at 1508 UTC - MPEC
3.97 LD May 26 2019 KN 22 m  8.23 to 10.31 LD May 22 - 30 NHATS target, exits ten LD
4.15 LD May 22 2019 KN2 14 m  6.91 to 7.54 LD May 10 - June 3 NEW - MPEC
5.49 LD June 4 2019 KY 18 m  8.34 from 9.44 LD yesterday - June 10 NHATS target
7.03 LD yesterday 2019 KV 19 m  7.05 to 7.27 LD May 23 - June 4 NHATS target - DOU
8.7   LD June 1* 2019 KL2 11 m  8.8 from 8.9 LD May 27 - June 5 NEW, Earth passage uncertainty +/- 8 mins.* - MPEC
9.07 LD May 28 2019 JH8 17 m  9.31 to 9.78 LD May 25 - 31
Approaching
3.77 LD June 3 2012 KZ41 32 m  11.41 from 14.00 LD tomorrow - June 7

This report was generated at 1922 UTC with the discoveries of inbound 2019 KL2 (MPEC), passing 2019 KG2 (MPEC), and outbound 2019 KN2 (MPEC). Today's DOU MPEC has follow-up for outbound 2019 KV, departed 2019 KW, and, from early May, risk-listed intruder 2019 JX1, adding 3.56 days to its previous 1.78-day observation arc.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's 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 temporal 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.

Radar Astrometry  on 30 May '19

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2232 UTC when the database was dated 30 May

NEOCP Activity  on 30 May '19

The MPC's NEO Confirmation Page has 142 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 142 objects listed. Of these, 95 were "one nighters." So far The Tracking News has counted a total of 183 listings on the NEOCP today.

New MPECs  on 30 May '19

Minor Planet Electronic Circulars

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


MPEC 2019-K83 - "20:22 UT" - 2015 VR142


MPEC 2019-K82 - "20:02 UT" - 2017 CJ1


MPEC 2019-K81 - "19:57 UT" - 2016 KC


MPEC 2019-K80 - "15:37 UT" - 2019 KN2


MPEC 2019-K79 - "15:32 UT" - 2019 KM2


MPEC 2019-K78 - "15:26 UT" - 2019 KL2


MPEC 2019-K77 - "15:21 UT" - 2019 KK2


MPEC 2019-K76 - "15:16 UT" - 2019 KJ2


MPEC 2019-K75 - "15:11 UT" - 2019 KH2


MPEC 2019-K74 - "15:06 UT" - 2019 KG2


MPEC 2019-K73 - "15:01 UT" - 2019 KF2


MPEC 2019-K72 - "14:56 UT" - 2019 KE2


MPEC 2019-K71 - "14:51 UT" - 2019 KD2


MPEC 2019-K70 - "14:46 UT" - 2019 KC2


MPEC 2019-K69 - "14:41 UT" - 2019 KB2


MPEC 2019-K68 - "14:31 UT" - 2011 HT


<< DOU on 30 May '19 >>  MPEC 2019-K67 - "12:03 UT" - Daily Orbit Update

Observers  on 30 May '19

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 66391
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2019-K75 -- 2019 KH2
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-K73 -- 2019 KF2
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-K82 -- 2017 CJ1
Z84Calar Alto Schmidt in Spain, 3 in MPECs 2019-K73, 2019-K74 & 2019-K78 -- 2019 KL2, 2019 KG2, 2019 KF2
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2019-K71 & 2019-K73 -- 2019 KF2, 2019 KD2
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 20 in MPECs 2019-K67, 2019-K70, 2019-K76 & 2019-K77 -- 2019 KW, 2019 KK2, 2019 KJ2, 2019 KE1, 2019 KC2, 2019 JZ4, 2019 JX6, 2019 JW2, 2019 JL5, 2019 JJ1, 2019 JF8, 2019 JF6, 2019 JA5, 2019 GP2, 2019 FJ1, 2019 EC2, 2019 AR4, 2013 CK89, 2012 QE50, 2011 PT1
958Dax Obs. in France, 1 in MPEC 2019-K74 -- 2019 KG2
K87Dettelbach Vineyard Obs. in Germany, 6 in MPECs 2019-K67, 2019-K71, 2019-K72, 2019-K74 & 2019-K80 -- 2019 KV, 2019 KN2, 2019 KG2, 2019 KE2, 2019 KD2, 2019 HC
A17Guidestar Obs. in Germany, 5 in MPECs 2019-K67, 2019-K71 & 2019-K74 -- 2019 KG2, 2019 KD2, 2019 GJ5, 2013 KJ6, 2011 LH
186Kitab Obs., 1 in MPEC 2019-K67 -- 1036
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2019-K70, 2019-K71, 2019-K74, 2019-K76 & 2019-K78 -- 2019 KL2, 2019 KJ2, 2019 KG2, 2019 KD2, 2019 KC2
V01Mountainville Obs. in Utah, 1 in MPEC 2019-K80 -- 2019 KN2
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2019-K68, 2019-K70, 2019-K74, 2019-K76, 2019-K78, 2019-K80 & 2019-K83 -- 2019 KN2, 2019 KL2, 2019 KJ2, 2019 KG2, 2019 KC2, 2015 VR142, 2011 HT
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-K74 -- 2019 KG2
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2019-K74 -- 2019 KG2
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2019-K68, 2019-K71, 2019-K72, 2019-K75, 2019-K76, 2019-K77, 2019-K79, 2019-K81, 2019-K82 & 2019-K83 -- 2019 KM2, 2019 KK2, 2019 KJ2, 2019 KH2, 2019 KE2, 2019 KD2, 2017 CJ1, 2016 KC, 2015 VR142, 2011 HT
F52Pan-STARRS 2 (PS2) in Hawaii, 7 in MPECs 2019-K71, 2019-K73, 2019-K75, 2019-K76, 2019-K80, 2019-K81 & 2019-K83 -- 2019 KN2, 2019 KJ2, 2019 KH2, 2019 KF2, 2019 KD2, 2016 KC, 2015 VR142
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2019-K68 -- 2011 HT
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-K71 -- 2019 KD2
C95SATINO-1 in France, 3 in MPECs 2019-K67, 2019-K74 & 2019-K80 -- 2019 KN2, 2019 KG2, 2019 CM4
C48Sayn Solar Obs. in Russia, 1 in MPEC 2019-K67 -- 2011 HP
204Schiaparelli Obs. in Italy, 2 in MPECs 2019-K71 & 2019-K74 -- 2019 KG2, 2019 KD2
033Schwarzschild Obs. in Germany, 5 in MPECs 2019-K71, 2019-K72, 2019-K73, 2019-K74 & 2019-K80 -- 2019 KN2, 2019 KG2, 2019 KF2, 2019 KE2, 2019 KD2
0948program code 8 via Simeis Obs. in Ukraine, 2 in MPEC 2019-K67 -- 2019 HC, 137170
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-K67 -- 2011 LH
G40)program code ")" (18) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-K67 -- 2018 XG5
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-K67 -- 2019 HC
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-K74 -- 2019 KG2
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2019-K72, 2019-K73, 2019-K77 & 2019-K79 -- 2019 KM2, 2019 KK2, 2019 KF2, 2019 KE2
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2019-K67, 2019-K77 & 2019-K79 -- 2019 KM2, 2019 KK2, 2019 JR7
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-K67 -- 2019 GD3
I93St. Pardon de Conques Obs. in France, 5 in MPECs 2019-K71, 2019-K73, 2019-K74, 2019-K78 & 2019-K80 -- 2019 KN2, 2019 KL2, 2019 KG2, 2019 KF2, 2019 KD2
I52Steward Obs. Mt. Lemmon Station in Arizona, 39 in MPECs 2019-K67, 2019-K68, 2019-K70, 2019-K71, 2019-K72, 2019-K73, 2019-K74, 2019-K75, 2019-K76, 2019-K77, 2019-K78 & 2019-K80 -- 2019 KX, 2019 KV, 2019 KU, 2019 KS, 2019 KR, 2019 KN2, 2019 KL2, 2019 KK2, 2019 KJ2, 2019 KJ1, 2019 KH2, 2019 KH1, 2019 KH, 2019 KG2, 2019 KG1, 2019 KG, 2019 KF2, 2019 KF1, 2019 KE2, 2019 KD2, 2019 KD, 2019 KC2, 2019 KC, 2019 JY4, 2019 JX7, 2019 JX2, 2019 JW2, 2019 JS5, 2019 JQ5, 2019 JP2, 2019 JG3, 2019 GP5, 2019 GP2, 2019 EQ1, 2019 AP3, 2018 YA3, 2015 PP291, 2013 YE38, 2011 HT
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-K67 -- 2019 KS, 2019 JX1
C51WISE in Earth polar orbit, 1 in MPEC 2019-K69 -- 2019 KB2
I41Zwicky Transient Facility (ZTF) in southern California, 6 in MPECs 2019-K67, 2019-K74 & 2019-K75 -- 2019 KH2, 2019 KG2, 23183, 173561, 164121, 162082
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 May '19

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 and NEODyS listings is 100 years, and both post impact solutions beyond that for some 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
2019 KSNEODyS1535R E M O V E D-
2019 JR7JPL Sentry15352067-206715.463e-07-4.59-4.590JPL: Computed at 06:58 today Pacific time based on 32 observations spanning 22.537 days (2019-May-07.92534 to 2019-May-30.46219). Diameter approximately 0.140 km. from weighted mean H=21.95.
NEODyS1535206716.61e-08-5.53-5.530NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2019-05-07.926 to 2019-05-30.463."
2019 JX1JPL Sentry15352100-210433.325e-07-8.61-8.750JPL: Computed at 07:06 today Pacific time based on 18 observations spanning 5.3404 days (2019-May-03.211297 to 2019-May-08.551654). Diameter approximately 0.005 km. from weighted mean H=29.13.
NEODyS15352100-210439.61e-07-8.14-8.240NEODyS: "Based on 18 optical observations (of which 2 are rejected as outliers) from 2019-05-03.212 to 2019-05-08.552."
2019 CM4NEODyS15352115-211732.04e-10-9.04-9.170NEODyS: "Based on 161 optical observations (of which 0 are rejected as outliers) from 2019-02-08.398 to 2019-03-14.351."

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 May '19

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

2232Noted Radar Astrometry database update - see above
2030Grabbed MPEC 2019-K81 - 2016 KC - see above
Grabbed MPEC 2019-K82 - 2017 CJ1 - see above
Grabbed MPEC 2019-K83 - 2015 VR142 - see above
1922Generated Traffic Report
1604Grabbed MPEC 2019-K80 - 2019 KN2 - see above
1535Noted that NEODyS has updated its 2019 CM4 risk assessment - see above
Noted that JPL Sentry has updated its 2019 JR7 risk assessment - see above
Noted that NEODyS has updated its 2019 JR7 risk assessment - see above
Noted that JPL Sentry has updated its 2019 JX1 risk assessment - see above
Noted that NEODyS has updated its 2019 JX1 risk assessment - see above
Noted that NEODyS has removed 2019 KS as an impact risk - see above
Grabbed MPEC 2019-K67 - Daily Orbit Update - see above
Grabbed MPEC 2019-K68 - 2011 HT - see above
Grabbed MPEC 2019-K69 - 2019 KB2 - see above
Grabbed MPEC 2019-K70 - 2019 KC2 - see above
Grabbed MPEC 2019-K71 - 2019 KD2 - see above
Grabbed MPEC 2019-K72 - 2019 KE2 - see above
Grabbed MPEC 2019-K73 - 2019 KF2 - see above
Grabbed MPEC 2019-K74 - 2019 KG2 - see above
Grabbed MPEC 2019-K75 - 2019 KH2 - see above
Grabbed MPEC 2019-K76 - 2019 KJ2 - see above
Grabbed MPEC 2019-K77 - 2019 KK2 - see above
Grabbed MPEC 2019-K78 - 2019 KL2 - see above
Grabbed MPEC 2019-K79 - 2019 KM2 - see above