Contents  on 27 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 27 May '19

Six objects reported inside ten LD

Six Solar-System small bodies are reported within ten lunar distances (LD) of Earth today. Closest of these is newly announced risk-listed intruder 2019 KT, which enters the Earth-Moon system, coming in from 3.12 to 0.94 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 tomorrow 2019 KT 16 m  0.94 from 3.12 LD May 24 - June 1 NEW, intruder today, enters Earth SOI, risk - MPEC
2.05 LD May 25 2019 KL 17 m  4.79 to 7.82 LD May 22 - 28 risk
3.97 LD yesterday 2019 KN 21 m  3.98 to 4.74 LD May 22 - 30 NHATS target
4.14 LD May 17 2012 KT12 19 m  9.26 to 10.05 LD May 7 - 27 NHATS target, exits ten LD
7.0   LD May 29* 2019 KV 19 m  7.3 from 7.7 LD May 23 - June 4 NEW, EPU +/- 6 mins.* - MPEC
9.07 LD tomorrow 2019 JH8 17 m  9.13 from 9.43 LD May 25 - 31 NEW - MPEC
Approaching
5.5   LD June 4* 2019 KY 19 m  11.9 from 13.1 LD May 29 - June 10 NEW, EPU +/- 1.67 hours* - MPEC
* EPU = Earth passage uncertainty

This report was generated at 1840 UTC with the discoveries of five objects. Details for four are posted in the above active traffic table, while departed 2019 KW (MPEC) is calculated with some uncertainty to have flown by us at about 1.8 LD* and the Moon at about 1.3 LD* on May 20th. Today's DOU MPEC has follow-up for departed 2019 KM.



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. "LD*" indicates some uncertainty in an object's Earth passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 27 May '19

The MPC's NEO Confirmation Page has 95 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 95 objects listed. Of these, 65 were "one nighters." So far The Tracking News has counted a total of 114 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 27 May '19

Minor Planet Electronic Circulars

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


MPEC 2019-K57 - "15:10 UT" - 2019 KY


MPEC 2019-K56 - "15:05 UT" - 2019 KX


MPEC 2019-K55 - "15:00 UT" - 2019 KW


MPEC 2019-K54 - "14:55 UT" - 2019 KV


MPEC 2019-K53 - "14:50 UT" - 2019 KU


MPEC 2019-K52 - "14:45 UT" - 2019 KT


MPEC 2019-K51 - "14:40 UT" - 2019 KS


MPEC 2019-K50 - "14:35 UT" - 2019 KR


MPEC 2019-K49 - "14:30 UT" - 2019 JH8


<< DOU on 27 May '19 >>  MPEC 2019-K48 - "12:02 UT" - Daily Orbit Update

Observers  on 27 May '19

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2019-K52 -- 2019 KT
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2019-K48, 2019-K50, 2019-K52, 2019-K54 & 2019-K55 -- 2019 KW, 2019 KV, 2019 KT, 2019 KR, 2018 XG5
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-K52 -- 2019 KT
Z84Calar Alto Schmidt in Spain, 2 in MPECs 2019-K50 & 2019-K51 -- 2019 KS, 2019 KR
J27El Guijo Obs. in Spain, 1 in MPEC 2019-K48 -- 2019 HC
X31Galilei Obs., 1 in MPEC 2019-K52 -- 2019 KT
K88GINOP-KHK in Hungary, 4 in MPECs 2019-K50, 2019-K52, 2019-K54 & 2019-K56 -- 2019 KX, 2019 KV, 2019 KT, 2019 KR
J95Great Shefford Obs. in England, 7 in MPECs 2019-K48, 2019-K49, 2019-K50, 2019-K52, 2019-K54, 2019-K55 & 2019-K56 -- 2019 KX, 2019 KW, 2019 KV, 2019 KT, 2019 KR, 2019 KM, 2019 JH8
A17Guidestar Obs. in Germany, 2 in MPECs 2019-K49 & 2019-K52 -- 2019 KT, 2019 JH8
585Kiev Comet Station in Ukraine, 1 in MPEC 2019-K52 -- 2019 KT
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2019-K50, 2019-K51, 2019-K52, 2019-K53, 2019-K54, 2019-K55, 2019-K56 & 2019-K57 -- 2019 KY, 2019 KX, 2019 KW, 2019 KV, 2019 KU, 2019 KT, 2019 KS, 2019 KR
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2019-K50, 2019-K52, 2019-K53, 2019-K54, 2019-K55, 2019-K56 & 2019-K57 -- 2019 KY, 2019 KX, 2019 KW, 2019 KV, 2019 KU, 2019 KT, 2019 KR
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2019-K48 -- 29075
Z80Northolt Branch Obs. in England, 2 in MPECs 2019-K48 & 2019-K52 -- 2019 KT, 162082
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2019-K49 -- 2019 JH8
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-K51 -- 2019 KS
D29Purple Mtn. Obs. Xuyi Station in China, 6 in MPEC 2019-K48 -- 2018 XQ4, 2015 JD1, 522684, 468741, 326683, 3551
C95SATINO-1 in France, 1 in MPEC 2019-K48 -- 2018 XG5
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-K52 -- 2019 KT
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2019-K49, 2019-K51 & 2019-K52 -- 2019 KT, 2019 KS, 2019 JH8
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2019-K50 -- 2019 KR
I52Steward Obs. Mt. Lemmon Station in Arizona, 10 in MPECs 2019-K48, 2019-K49, 2019-K50, 2019-K51, 2019-K52, 2019-K53, 2019-K54, 2019-K55, 2019-K56 & 2019-K57 -- 2019 KY, 2019 KX, 2019 KW, 2019 KV, 2019 KU, 2019 KT, 2019 KS, 2019 KR, 2019 KC, 2019 JH8
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 KTJPL Sentry16302110-211036.904e-07-7.18-7.460JPL: Computed at 08:58 today Pacific time based on 59 observations spanning 1.2437 days (2019-May-26.15139 to 2019-May-27.395111). Diameter approximately 0.016 km. from weighted mean H=26.56.
2019 KLNEODyS16302051-208561.96e-07-7.36-7.90NEODyS: "Based on 52 optical observations (of which 4 are rejected as outliers) from 2019-05-24.381 to 2019-05-25.447."
2019 JD8NEODyS16302056-2110154.78e-07-6.31-6.670NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2019-05-15.337 to 2019-05-17.322."
2019 JR7NEODyS1630206712.42e-07-4.97-4.970NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2019-05-07.926 to 2019-05-24.431."
2019 JR2NEODyS16302079-2118242.65e-05-5.79-5.90NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2019-05-04.319 to 2019-05-10.131."
2006 QV89NEODyS16302019-2117241.4e-04-3.62-3.630NEODyS: "Based on 70 optical observations (of which 0 are rejected as outliers) from 2006-08-29.308 to 2006-09-08.170."

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 27 May '19

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

1840Generated Traffic Report
1630Noted that NEODyS has updated its 2006 QV89 risk assessment - see above
Noted that NEODyS has posted 2019 JD8 as an impact risk - see above
Noted that NEODyS has updated its 2019 JR2 risk assessment - see above
Noted that NEODyS has posted 2019 JR7 as an impact risk - see above
Noted that NEODyS has posted 2019 KL as an impact risk - see above
Noted that JPL Sentry has posted 2019 KT as an impact risk - see above
Grabbed MPEC 2019-K48 - Daily Orbit Update - see above
Grabbed MPEC 2019-K49 - 2019 JH8 - see above
Grabbed MPEC 2019-K50 - 2019 KR - see above
Grabbed MPEC 2019-K51 - 2019 KS - see above
Grabbed MPEC 2019-K52 - 2019 KT - see above
Grabbed MPEC 2019-K53 - 2019 KU - see above
Grabbed MPEC 2019-K54 - 2019 KV - see above
Grabbed MPEC 2019-K55 - 2019 KW - see above
Grabbed MPEC 2019-K56 - 2019 KX - see above
Grabbed MPEC 2019-K57 - 2019 KY - see above