Contents  on 22 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 22 May '17

One object reported inside ten LD

Today one minor planet is reported inside a sphere with a radius of ten lunar distances (LD) from Earth. 2017 HU49 is outbound from 6.86 to 7.09 LD. Coming into that sphere next, radar target 2017 CS arrives on May 26th.

This report was generated at 1823 UTC with follow-up in today's DOU MPEC for 2017 HU49 and 2017 CS, and for departed objects 2017 KG3 (first follow-up), 2017 JP2, and 2017 JY1.



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 22 May '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, 29 were "one nighters." So far The Tracking News has counted a total of 71 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 22 May '17

Minor Planet Electronic Circulars

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


<< DOU on 22 May '17 >>  MPEC 2017-K32 - "12:03 UT" - Daily Orbit Update


MPEC 2017-K31 - "02:21 UT" - 2014 UJ192

Observers  on 22 May '17

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 6 in MPEC 2017-K32 -- 2017 HE49, 2016 JJ17, 2015 NW9, 2015 JD2, 2014 VM, 2010 MW
T05ATLAS Haleakala in Hawaii, 3 in MPEC 2017-K32 -- 54789, 142561, 13651
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-K32 -- 2017 CS
B66Casasco Obs. in Italy, 3 in MPEC 2017-K32 -- 2017 CS, 90075, 2329
160Castelmartini Obs. in Italy, 6 in MPEC 2017-K32 -- 66391, 456651, 222073, 142561, 2102, 1917
703Catalina Sky Survey (CSS) in Arizona, 13 in MPEC 2017-K32 -- 2017 CS, 488465, 260141, 190166, 175189, 159560, 141056, 138359, 106589, 100926, 5626, 5604, 3288
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2017-K32 -- 2017 KE3, 2017 JU2, 2017 JF3, 2017 HJ1, 2017 HC49, 2017 FL128, 2017 ED4
157Frasso Sabino Obs. in Italy, 2 in MPEC 2017-K32 -- 2017 HN3, 329774
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPEC 2017-K32 -- 2017 KF3, 2017 KE3
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2017-K32 -- 2015 ME54, 2014 SO143
474Mt. John Obs. in New Zealand, 12 in MPEC 2017-K32 -- 2017 JY1, 2017 JT2, 2017 JT1, 2017 JO2, 2017 HU49, 2017 HO49, 2017 BQ93, 2016 YN, 2015 KG154, 2008 NU, 2003 MT, 288592
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPEC 2017-K32 -- 488465, 480984, 412976, 409256, 399307, 391033, 331769, 276049, 250620, 215588, 162452, 159560, 141056, 138359
A13Naef Obs. in Switzerland, 2 in MPEC 2017-K32 -- 2005 MO13, 2005 GL9
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2017-K32 -- 2017 JP2, 190166
F51Pan-STARRS 1 (PS1) in Hawaii, 9 in MPECs 2017-K31 & 2017-K32 -- 2017 HW48, 2017 HV3, 2014 UJ192, 2014 HR184, 2013 NJ10, 2011 UU106, 2004 JR, 363075, 162149
D29Purple Mtn. Obs. Xuyi Station in China, 6 in MPEC 2017-K32 -- 68348, 456651, 374038, 154144, 136582, 3552
V83Rolling Hills Obs. in Missouri, 1 in MPEC 2017-K32 -- 2017 CS
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2017-K32 -- 2017 KE3, 2017 FE1, 2010 LQ33
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2017-K32 -- 2017 JT2, 2017 HY4, 2017 HK1, 2015 KG154, 2014 UJ192, 2013 GV68, 2012 VZ36, 2006 OH15, 2006 KA40
I52Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPEC 2017-K32 -- 2017 KL3, 2017 KG3, 2017 KE3, 2017 JP2, 2014 UJ192
926Tenagra II Obs. in Arizona, 11 in MPECs 2017-K31 & 2017-K32 -- 2017 KH3, 2017 KD3, 2017 JV2, 2017 JL3, 2017 GU6, 2017 GQ6, 2014 UJ192, 2003 MT, 86819, 276468, 142561
Z52The Studios Obs., 1 in MPEC 2017-K32 -- 11398
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-K32 -- 2016 UL5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 KB3NEODyS16452052-21171268.45e-06-5.05-5.380NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2017-05-17.219 to 2017-05-20.177."
2017 HZ4NEODyS16452068-2114268.62e-05-4.87-4.880NEODyS: "Based on 42 optical observations (of which 1 are rejected as outliers) from 2017-04-26.445 to 2017-05-21.255."

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 22 May '17

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

1823Generated Traffic Report
1645Noted that NEODyS has updated its 2017 HZ4 risk assessment - see above
Noted that NEODyS has posted 2017 KB3 as an impact risk - see above
Grabbed MPEC 2017-K32 - Daily Orbit Update - see above
0335Grabbed MPEC 2017-K31 - 2014 UJ192 - see above