Contents  on 3 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 3 May '17

Five objects reported inside ten LD

There are five transient natural objects reported within ten lunar distances (LD) of our home world today. Intruder 2017 JA is the nearest, heading out from 2.48 to 6.02 LD.

Earth passage I D ~Size Distance Today  Notes
0.26 LD yesterday2017 JA 6 m  2.48 to 6.02 LD intruder
0.61 LD April 222017 HG4 10 m  8.81 to 9.61 LD intruder, risk - DOU
5.55 LD May 112017 HU49 19 m  6.45 from 6.68 LD
6.13 LD April 302017 HU3 30 m  8.44 to 9.93 LD
9.79 LD May 12017 HA5 12 m  9.86 to 10.02 LD exits ten LD
Approaching
3.70 LD May 82017 HX4 19 m  < 10 LD May 5 - DOU
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target - DOU

This report was generated at 1952 UTC with the recovery of distant 2007 TU24 in today's DOU MPEC along with follow-up for three objects in the active traffic table here as well as for departed objects 2017 HT49 and radar target 2014 JO25.



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 during the ten-plus years since A/CC began these traffic reports, but is not so close during this apparition. 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 3 May '17

The MPC's NEO Confirmation Page has 30 listings

When last checked at 2306 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 30 objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 38 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 3 May '17

Minor Planet Electronic Circulars

As of last check at 2306 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 3 May '17 >>  MPEC 2017-J35 - "11:59 UT" - Daily Orbit Update


MPEC 2017-J34 - "02:28 UT" - 2017 JB


MPEC 2017-J33 - "02:24 UT" - 2017 HZ49


MPEC 2017-J32 - "02:20 UT" - 2017 HY49


MPEC 2017-J31 - "02:17 UT" - 2017 HX49


MPEC 2017-J30 - "02:07 UT" - 1996 VB3

Observers  on 3 May '17

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 2 in MPECs 2017-J30 & 2017-J34 -- 2017 JB, 1996 VB3
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-J35 -- 66400
160Castelmartini Obs. in Italy, 11 in MPEC 2017-J35 -- 2011 ED78, 484795, 475665, 456651, 427643, 222073, 163696, 138359, 7888, 5626, 2329
703Catalina Sky Survey (CSS) in Arizona, 22 in MPECs 2017-J30 & 2017-J35 -- 2017 GU6, 2017 CS, 2016 WO1, 2012 HN8, 2011 GL44, 2000 AF205, 1998 HK1, 1996 VB3, 66400, 484517, 480934, 475665, 276468, 222073, 220124, 190166, 152931, 136923, 13651, 100926, 7358, 5604
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPECs 2017-J31 & 2017-J35 -- 2017 HX49, 2017 HT3, 2017 HQ3, 2017 HJ49, 2017 HJ2, 2017 GN4, 2017 FS101, 2017 FL128, 2017 FE128, 2017 EC, 2017 DS36, 2017 BU31
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2017-J35 -- 2014 JO25
J27El Guijo Obs. in Spain, 2 in MPEC 2017-J35 -- 163696, 2329
K88GINOP-KHK in Hungary, 3 in MPECs 2017-J30, 2017-J32 & 2017-J33 -- 2017 HZ49, 2017 HY49, 1996 VB3
J95Great Shefford Obs. in England, 1 in MPEC 2017-J31 -- 2017 HX49
H15ISON New Mexico Obs. in New Mexico, 2 in MPEC 2017-J35 -- 456651, 154144
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2017-J35 -- 2011 VR5
130Lumezzane Obs. in Italy, 1 in MPEC 2017-J35 -- 66400
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2017-J30 & 2017-J34 -- 2017 JB, 1996 VB3
474Mt. John Obs. in New Zealand, 3 in MPECs 2017-J30, 2017-J32 & 2017-J34 -- 2017 JB, 2017 HY49, 1996 VB3
G96Mt. Lemmon Survey (MLS) in Arizona, 36 in MPECs 2017-J30, 2017-J31, 2017-J32, 2017-J33, 2017-J34 & 2017-J35 -- 2017 JB, 2017 HZ49, 2017 HY49, 2017 HX49, 2017 GU6, 2017 GQ4, 2017 FO2, 2016 UW80, 2016 SD, 2015 KJ122, 2014 SO143, 2014 JO25, 2014 CX14, 2012 HL31, 2010 VZ71, 2010 VE1, 2006 BX139, 2002 GK8, 1999 HD1, 1998 HK1, 1996 VB3, 90373, 427643, 391033, 326302, 281365, 276891, 276468, 222073, 190166, 162452, 141527, 136923, 136897, 7341, 4954
557Ondrejov Obs. in the Czech Republic, 2 in MPEC 2017-J35 -- 2014 JO25, 163693
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2017-J30, 2017-J34 & 2017-J35 -- 2017 JB, 2017 HT2, 2017 FS101, 1996 VB3
W98Polonia Obs. in Chile, 2 in MPEC 2017-J35 -- 1994 JX, 20460
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-J33 -- 2017 HZ49
H36Sandlot Obs. in Kansas, 2 in MPECs 2017-J33 & 2017-J34 -- 2017 JB, 2017 HZ49
204Schiaparelli Obs. in Italy, 1 in MPEC 2017-J30 -- 1996 VB3
033Schwarzschild Obs. in Germany, 4 in MPEC 2017-J35 -- 2017 HZ49, 2017 HP3, 2017 HC1, 1996 VB3
691Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2017-J35 -- 2017 HX4, 2017 HW48, 2017 HS, 2017 HJ49, 2017 GU6, 2017 GT6, 2017 FK128, 2014 SZ303, 2014 SR339, 2013 RF36
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2017-J35 -- 2017 HZ4, 2017 HT2, 2017 HS3, 2017 HG4, 2017 GJ6, 2017 FM128, 2007 TU24, 2007 GS3, 2003 MD7
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-J35 -- 138359
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2017-J30, 2017-J31 & 2017-J32 -- 2017 HY49, 2017 HX49, 1996 VB3
I52Steward Obs. Mt. Lemmon Station in Arizona, 30 in MPECs 2017-J30, 2017-J31, 2017-J32, 2017-J33, 2017-J34 & 2017-J35 -- 2017 JB, 2017 HZ49, 2017 HY49, 2017 HY4, 2017 HX49, 2017 HX4, 2017 HX3, 2017 HV4, 2017 HU4, 2017 HT49, 2017 HT3, 2017 HP3, 2017 HN3, 2017 HK1, 2017 HJ49, 2017 HH49, 2017 HH2, 2017 HE4, 2017 HD49, 2017 HC49, 2017 GT6, 2017 GS4, 2017 GQ6, 2017 GP6, 2017 GO7, 2017 GJ6, 2017 FQ128, 2017 FD65, 2011 GL44, 1996 VB3
926Tenagra II Obs. in Arizona, 12 in MPECs 2017-J30, 2017-J31, 2017-J32, 2017-J33, 2017-J34 & 2017-J35 -- 2017 JB, 2017 HZ49, 2017 HY49, 2017 HX49, 2017 HT3, 2017 HC49, 2017 GO7, 2017 FS101, 2017 AQ19, 2016 WO1, 2014 JS54, 1996 VB3
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2017-J35 -- 2014 JO25
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2017-J35 -- 2017 HC1, 2016 JP, 2010 JH88, 2005 GB120
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 May '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2306 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 HZ4JPL Sentry15362082-2113195.392085e-05-5.05-5.340JPL: Computed at 08:17 today Pacific time based on 23 observations spanning 6.7418 days (2017-Apr-26.44436 to 2017-May-03.18613). Diameter approximately 0.022 km. from weighted mean H=25.90.
2017 HG4JPL Sentry15362048-2115222.8080686e-05-6.01-6.700JPL: Computed at 08:32 today Pacific time based on 32 observations spanning 7.0995 days (2017-Apr-26.26272 to 2017-May-03.36227). Diameter approximately 0.010 km. from weighted mean H=27.64.
2017 HT2JPL Sentry1500R E M O V E DJPL: Risk listing removed at 1449 UTC today.

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 3 May '17

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

1952Generated Traffic Report
1536Noted that JPL Sentry has updated its 2017 HG4 risk assessment - see above
Noted that JPL Sentry has updated its 2017 HZ4 risk assessment - see above
1500Noted that JPL Sentry has removed 2017 HT2 as an impact risk - see above
1430Grabbed MPEC 2017-J35 - Daily Orbit Update - see above
0315Grabbed MPEC 2017-J30 - 1996 VB3 - see above
Grabbed MPEC 2017-J31 - 2017 HX49 - see above
Grabbed MPEC 2017-J32 - 2017 HY49 - see above
Grabbed MPEC 2017-J33 - 2017 HZ49 - see above
Grabbed MPEC 2017-J34 - 2017 JB - see above