Contents  on 23 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 23 May '19

Three objects reported inside ten LD

There are three asteroidal objects reported within ten lunar distances (LD) of our planet today. All are outbound and none are closer than 5.84 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
2.48 LD May 20 2019 JL3 36 m  5.84 to 7.66 LD May 15 - 25
4.14 LD May 17 2012 KT12 19 m  6.32 to 7.01 LD May 7 - 27 NHATS target
6.09 LD May 17 2019 GT1 34 m  7.54 to 8.10 LD May 8 - 26 NHATS target

This report was generated at 1750 UTC with first follow-up in today's DOU MPEC for departed risk-listed 2019 HS3 (12.09 days added to 1.97-day discovery 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.

NEOCP Activity  on 23 May '19

The MPC's NEO Confirmation Page has 41 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 41 objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 48 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 23 May '19

Minor Planet Electronic Circulars

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


MPEC 2019-K15 - "19:20 UT" - 2010 KC


MPEC 2019-K14 - "18:24 UT" - Comet C/2019 J3 (ATLAS)


MPEC 2019-K13 - "17:50 UT" - Comet C/2019 K1 (ATLAS)


<< DOU on 23 May '19 >>  MPEC 2019-K12 - "12:03 UT" - Daily Orbit Update

Observers  on 23 May '19

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2019-K15 -- 2010 KC
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-K14 -- C/2019 J3
T08ATLAS Mauna Loa in Hawaii, 2 in MPECs 2019-K13 & 2019-K14 -- C/2019 K1, C/2019 J3
I47Auger Obs. in Argentina, 2 in MPECs 2019-K12 & 2019-K14 -- C/2019 J3, 326777
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2019-K13 -- C/2019 K1
X74Campo dos Amarais Obs., 1 in MPEC 2019-K13 -- C/2019 K1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2019-K12, 2019-K13 & 2019-K14 -- C/2019 K1, 2019 JA1, C/2019 J3, 2019 HK4, 2019 HG4, 2019 GS3, 2019 GN19
N55Corona Borealis Obs. in Tibet, 2 in MPECs 2019-K13 & 2019-K14 -- C/2019 K1, C/2019 J3
958Dax Obs. in France, 1 in MPEC 2019-K12 -- 326777
L29Drebach-South Obs., 1 in MPEC 2019-K13 -- C/2019 K1
L34Galhassin Robotic Telescope, 2 in MPECs 2019-K12 & 2019-K13 -- C/2019 K1, 326777
J95Great Shefford Obs. in England, 1 in MPEC 2019-K15 -- 2010 KC
A17Guidestar Obs. in Germany, 3 in MPECs 2019-K12 & 2019-K15 -- 2012 CP2, 2011 LH, 2010 KC
Q62iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2019-K13 & 2019-K14 -- C/2019 K1, C/2019 J3
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-K14 -- C/2019 J3
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-K13 -- C/2019 K1
585Kiev Comet Station in Ukraine, 1 in MPEC 2019-K13 -- C/2019 K1
K91LCO Sutherland A in South Africa, 1 in MPEC 2019-K13 -- C/2019 K1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2019-K13, 2019-K14 & 2019-K15 -- C/2019 K1, C/2019 J3, 2010 KC
181Makes Obs. in France, 1 in MPEC 2019-K13 -- C/2019 K1
C653program code 3 via Montsec Obs. in Spain, 1 in MPEC 2019-K13 -- C/2019 K1
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-K15 -- 2010 KC
C53NEOSSat in Earth orbit, 1 in MPEC 2019-K14 -- C/2019 J3
J69North Obs. in England, 2 in MPEC 2019-K12 -- 2011 HP, 326777
K63Pascoli Obs. in Italy, 3 in MPEC 2019-K12 -- 2019 HC, 2011 HP, 112221
D29Purple Mtn. Obs. Xuyi Station in China, 17 in MPEC 2019-K12 -- 2019 GD3, 2016 RR33, 2008 HF2, 96631, 90367, 85989, 85236, 52381, 408869, 376775, 277142, 267729, 185716, 141765, 5879, 1863, 1036
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-K13 -- C/2019 K1
C95SATINO-1 in France, 1 in MPEC 2019-K12 -- 2017 HT3
W884G. Gasparovic in Croatia via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-K14 -- C/2019 J3
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-K15 -- 2010 KC
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2019-K13 & 2019-K15 -- C/2019 K1, 2010 KC
I52Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2019-K12 & 2019-K15 -- 2019 JP5, 2019 JP2, 2010 KC
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-K12 -- 2019 HS3
L01Visnjan Obs., 2 in MPECs 2019-K13 & 2019-K15 -- C/2019 K1, 2010 KC
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 HS3JPL Sentry15352055-208371.033866e-05-5.40-5.460JPL: Computed at 06:59 today Pacific time based on 18 observations spanning 14.061 days (2019-Apr-26.30606 to 2019-May-10.366945). Diameter approximately 0.014 km. from weighted mean H=26.95.
NEODyS15352055-2083101.45e-05-5.27-5.340NEODyS: "Based on 19 optical observations (of which 2 are rejected as outliers) from 2019-04-26.307 to 2019-05-10.368."

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 23 May '19

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

2010Grabbed MPEC 2019-K15 - 2010 KC - see above
1851Grabbed MPEC 2019-K14 - Comet C/2019 J3 (ATLAS) - see above
1830Grabbed MPEC 2019-K13 - Comet C/2019 K1 (ATLAS) - see above
1750Generated Traffic Report
1535Noted that JPL Sentry has updated its 2019 HS3 risk assessment - see above
Noted that NEODyS has updated its 2019 HS3 risk assessment - see above
Grabbed MPEC 2019-K12 - Daily Orbit Update - see above