Contents  on 22 April '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 April '17

Six objects reported inside ten LD

Six asteroids are known to be within ten lunar distances (LD) of our planet today. Nearest are 2017 HD, which comes its closest to Earth on this passage, reaching 3.77 LD at 1703 UTC, and two inbound objects: 2017 HY moves in from 5.17 to 4.00 LD and 2017 HB1 from 5.23 to 4.21 LD.

Earth passage I D ~Size Distance Today  Notes
1.05 LD April 32017 FT102 4 m  9.17 to 9.67 LD NHATS target
2.81 LD April 162017 HG1 12 m  7.86 to 9.23 LD DOU
3.24 LD April 242017 HY 11 m  4.00 from 5.17 LD DOU
3.59 LD April 242017 HB1 19 m  4.21 from 5.23 LD DOU
3.77 LD today2017 HD 14 m  3.77 LD Earth closest at 1703 UTC - DOU
6.07 LD tomorrow2017 HH1 26 m  6.58 from 8.99 LD DOU
Approaching
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target

This report was updated at 2012 UTC with follow-up in today's DOU MPEC for five objects in the active traffic table here and for eight departed objects: 2017 HL1, 2017 HZ, 2017 HW, 2017 HG, 2017 HF, 2017 HE, risk-listed 2017 HJ, and radar target 2014 JO25, plus astrometry from March for risk-listed NHATS target 2017 FW90. The DOU also reports the discoveries of four departed objects. Intruder 2017 FX158 went past us at 0.71 LD on March 20th and risk-listed intruder 2017 FW158 reached 0.32 LD (and passed the Moon at 0.40 LD) on March 17th. The other two objects have major uncertainties in their passages, initially calculated at 3.9 LD for 2017 FA159 on March 23rd and 3.8 LD for risk-listed 2017 GG8 on March 29th. Your first local asteroids traffic report was generated at 0340 UTC.



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 April '17

The MPC's NEO Confirmation Page has 35 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 35 objects listed. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 51 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 April '17

Minor Planet Electronic Circulars

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


MPEC 2017-H48 - "23:17 UT" - 2017 HK2


MPEC 2017-H47 - "23:14 UT" - 2017 HJ2


MPEC 2017-H46 - "23:12 UT" - 2017 HH2


MPEC 2017-H45 - "23:08 UT" - 2017 HG2


<< DOU on 22 Apr. '17 >>  MPEC 2017-H44 - "12:07 UT" - Daily Orbit Update

Observers  on 22 April '17

A total of 48 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 1 in MPEC 2017-H44 -- 2014 JO25
K40Altdorf Obs. in Germany, 1 in MPEC 2017-H44 -- 2014 JO25
705"Kristie Nault via Apache Point Obs. in New Mexico, 2 in MPECs 2017-H45 & 2017-H46 -- 2017 HH2, 2017 HG2
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2017-H44 & 2017-H46 -- 2017 HK1, 2017 HH2, 2017 HC1
T08ATLAS Mauna Loa in Hawaii, 4 in MPEC 2017-H44 -- 66400, 54789, 1627, 887
A81Balzaretto Obs. in Italy, 1 in MPEC 2017-H44 -- 2014 JO25
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-H46 -- 2017 HH2
160Castelmartini Obs. in Italy, 4 in MPECs 2017-H44 & 2017-H46 -- 2017 HH2, 2017 FH101, 2017 AC5, 484795
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2017-H44 -- 2010 JH88, 2005 GB120, 89830, 66400, 474179, 391508, 260141, 220124, 152931, 11398
470Ceccano Obs. in Italy, 1 in MPEC 2017-H44 -- 2017 HB1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2017-H44 & 2017-H48 -- 2017 HK2, 2017 HJ, 2017 HE, 2017 FX2, 2017 FW158, 2017 FQ102, 2017 FN63, 2017 FJ128, 2017 BF29, 2016 WJ7
B92Chinon Obs. in France, 1 in MPEC 2017-H44 -- 2014 JO25
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2017-H44 -- 2014 JO25
958Dax Obs. in France, 1 in MPEC 2017-H46 -- 2017 HH2
J27El Guijo Obs. in Spain, 1 in MPEC 2017-H44 -- 474231
151Eschenberg Obs. in Switzerland, 2 in MPECs 2017-H44 & 2017-H46 -- 2017 HH2, 2014 JO25
006Fabra Obs. in Spain, 1 in MPEC 2017-H44 -- 2014 JO25
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-H44 -- 2014 JO25
J95Great Shefford Obs. in England, 1 in MPEC 2017-H46 -- 2017 HH2
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-H44 -- 2014 JO25
K85Kelmis Obs., 1 in MPEC 2017-H44 -- 2014 JO25
K42Knielingen Obs., 1 in MPEC 2017-H44 -- 2014 JO25
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2017-H44 -- 2011 LC19
K91LCOGT Sutherland A in South Africa, 2 in MPECs 2017-H44 & 2017-H48 -- 2017 HK2, 2017 GF8
130Lumezzane Obs. in Italy, 9 in MPEC 2017-H44 -- 2017 AC5, 484517, 474231, 474179, 405427, 391508, 252091, 220124, 138359
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2017-H44, 2017-H45, 2017-H46, 2017-H47 & 2017-H48 -- 2017 HK2, 2017 HJ2, 2017 HH2, 2017 HG2, 2017 FW158
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-H45, 2017-H47 & 2017-H48 -- 2017 HK2, 2017 HJ2, 2017 HG2
213Montcabre Obs. in Spain, 1 in MPEC 2017-H44 -- 2014 JO25
474Mt. John Obs. in New Zealand, 6 in MPECs 2017-H44, 2017-H47 & 2017-H48 -- 2017 HZ, 2017 HY, 2017 HW, 2017 HK2, 2017 HJ2, 2017 HE
G96Mt. Lemmon Survey (MLS) in Arizona, 19 in MPEC 2017-H44 -- 2017 GM6, 2017 FX158, 2017 FW158, 2017 FQ64, 2017 FP64, 2017 FH101, 2017 FA159, 2017 AP20, 2017 AC5, 2016 DP, 2015 KN120, 474231, 163696, 154144, 152931, 141527, 138155, 4055, 2329
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-H44 -- 2014 JO25
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2017-H44, 2017-H45, 2017-H46, 2017-H47 & 2017-H48 -- 2017 HK2, 2017 HJ2, 2017 HH2, 2017 HG2, 2017 GG8, 2017 GF8, 2017 FY158
K63Pascoli Obs. in Italy, 1 in MPEC 2017-H46 -- 2017 HH2
B49Paus Obs. in Spain, 1 in MPEC 2017-H46 -- 2017 HH2
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2017-H44, 2017-H46 & 2017-H47 -- 2017 HJ2, 2017 HH2, 2014 JO25
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-H44 -- 2014 JO25
204Schiaparelli Obs. in Italy, 15 in MPECs 2017-H44, 2017-H45 & 2017-H46 -- 2017 HH2, 2017 HG2, 2017 HD, 2017 GB8, 2017 FY, 2017 FW90, 2017 FT, 2017 FO63, 2017 FL1, 2017 FK63, 2017 FH3, 2017 FG128, 2014 JO25, 2012 HN8, 2005 GB120
Y00SONEAR in Brazil, 2 in MPEC 2017-H44 -- 388838, 1864
587Sormano Obs. in Italy, 2 in MPECs 2017-H46 & 2017-H47 -- 2017 HJ2, 2017 HH2
691Spacewatch 0.9m telescope in Arizona, 12 in MPECs 2017-H44, 2017-H45, 2017-H46 & 2017-H47 -- 2017 HL1, 2017 HJ2, 2017 HH2, 2017 HG2, 2017 HG, 2017 GV6, 2017 GK4, 2017 FP64, 2017 FE65, 2016 XH2, 2016 XD1, 2016 VV3
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2017-H44, 2017-H47 & 2017-H48 -- 2017 HK2, 2017 HJ2, 2017 HJ, 2017 GQ6, 2017 GP6, 2017 GM7, 2017 FY158, 2017 FW158, 2017 FN128, 2017 FD157, 2012 BB124, 2011 LC19, 2010 LL34, 2010 JU39, 2010 GV147, 2002 JX8
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-H44 -- 2014 JO25
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2017-H46 -- 2017 HH2
I52Steward Obs. Mt. Lemmon Station in Arizona, 9 in MPEC 2017-H44 -- 2017 HX, 2017 HU, 2017 HL1, 2017 HH1, 2017 HG1, 2017 HF, 2017 HA1, 2017 FX158, 2014 JO25
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-H44 -- 2014 JO25
926Tenagra II Obs. in Arizona, 9 in MPECs 2017-H44, 2017-H45, 2017-H46, 2017-H47 & 2017-H48 -- 2017 HU, 2017 HK2, 2017 HJ2, 2017 HH2, 2017 HH1, 2017 HG2, 2017 HB1, 2017 GG8, 2017 FX158
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2017-H44 -- 2017 HJ, 2017 GM7, 2014 JO25
K17Valentines Obs., 1 in MPEC 2017-H44 -- 2014 JO25
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 April '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 HJJPL Sentry16302089-211787.387793e-06-6.39-6.560JPL: Computed at 09:05 today Pacific time based on 48 observations spanning 4.7605 days (2017-Apr-17.42568 to 2017-Apr-22.1862). Diameter approximately 0.011 km. from weighted mean H=27.44.
2017 GG8JPL Sentry15402046-2116661.82521037e-05-5.32-6.060JPL: Computed at 08:13 today Pacific time based on 6 observations spanning .90698 days (2017-Apr-06.49584 to 2017-Apr-07.40282). Diameter approximately 0.022 km. from weighted mean H=25.97.
2017 GM7JPL Sentry15402076-207615.916e-10-6.06-6.060JPL: Computed at 08:30 today Pacific time based on 45 observations spanning 15.160 days (2017-Apr-07.25669 to 2017-Apr-22.41701). Diameter approximately 0.610 km. from weighted mean H=18.72.
2017 GM6JPL Sentry16302111-211321.999e-07-7.66-7.890JPL: Computed at 08:51 today Pacific time based on 36 observations spanning 16.015 days (2017-Apr-05.34221 to 2017-Apr-21.35751). Diameter approximately 0.022 km. from weighted mean H=25.96.
2017 FA159JPL Sentry22012022-21161808.725156e-07-7.66-8.460JPL: Computed at 14:50 today Pacific time based on 8 observations spanning .16326 days (2017-Mar-18.25951 to 2017-Mar-18.42277). Diameter approximately 0.006 km. from weighted mean H=28.59.
2017 FW158JPL Sentry15402067-2115161.40264e-06-7.57-8.250JPL: Computed at 08:07 today Pacific time based on 16 observations spanning 1.9971 days (2017-Mar-19.39761 to 2017-Mar-21.39473). Diameter approximately 0.007 km. from weighted mean H=28.37.
2017 FN128JPL Sentry1630R E M O V E DJPL: Risk listing removed at 1550 UTC today.
2017 FW90JPL Sentry15402101-210343.2131e-05-6.45-6.740JPL: Computed at 08:35 today Pacific time based on 81 observations spanning 11.052 days (2017-Mar-25.34512 to 2017-Apr-05.39665). Diameter approximately 0.008 km. from weighted mean H=28.14.
2017 FO63JPL Sentry1540R E M O V E DJPL: Risk listing removed at 1509 UTC today.
2016 FV7JPL Sentry15402083-208319.111e-10-7.75-7.750JPL: Computed at 03:42 today Pacific time based on 68 observations spanning 23.654 days (2016-Mar-10.48145 to 2016-Apr-03.13576). Diameter approximately 0.079 km. from weighted mean H=23.16.
2016 EU84JPL Sentry15402115-211511.093e-06-8.39-8.390JPL: Computed at 00:10 today Pacific time based on 96 observations spanning 4.0778 days (2016-Mar-10.17807 to 2016-Mar-14.25583). Diameter approximately 0.005 km. from weighted mean H=28.95.
2016 BQ15JPL Sentry15402072-209824.069e-08-7.30-7.480JPL: Computed at 23:50 April 21st Pacific time based on 68 observations spanning 8.1467 days (2016-Jan-30.45492 to 2016-Feb-07.60166). Diameter approximately 0.032 km. from weighted mean H=25.15.
2016 BP14JPL Sentry04012079-207913.728e-08-5.39-5.390JPL: Computed at 20:35 April 21st Pacific time based on 43 observations spanning 36.980 days (2016-Jan-21.2268 to 2016-Feb-27.20678). Diameter approximately 0.210 km. from weighted mean H=21.03.
2014 BZ2JPL Sentry15402106-210617.160e-09-8.45-8.450JPL: Computed at 23:05 April 21st Pacific time based on 48 observations spanning 2.8343 days (2014-Jan-21.25664 to 2014-Jan-24.090924). Diameter approximately 0.027 km. from weighted mean H=25.48.
2013 JM22JPL Sentry15402095-209513.241e-09-7.39-7.390JPL: Computed at 05:58 today Pacific time based on 74 observations spanning 3.7723 days (2013-May-12.34486 to 2013-May-16.117174). Diameter approximately 0.075 km. from weighted mean H=23.27.
2011 SC108JPL Sentry15402111-211114.884e-09-9.66-9.660JPL: Computed at 05:53 today Pacific time based on 34 observations spanning .27315 days (2011-Sep-27.24019 to 2011-Sep-27.51334). Diameter approximately 0.009 km. from weighted mean H=27.86.
2006 WM3JPL Sentry17302113-211315.826e-08-6.70-6.700JPL: Computed at 10:08 today Pacific time based on 43 observations spanning 21.898 days (2006-Nov-20.22614 to 2006-Dec-12.124219). Diameter approximately 0.078 km. from weighted mean H=23.20.

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 April '17

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

2325Grabbed MPEC 2017-H45 - 2017 HG2 - see above
Grabbed MPEC 2017-H46 - 2017 HH2 - see above
Grabbed MPEC 2017-H47 - 2017 HJ2 - see above
Grabbed MPEC 2017-H48 - 2017 HK2 - see above
2201Noted that JPL Sentry has posted 2017 FA159 as an impact risk - see above
2012Updated Traffic Report
1730Noted that JPL Sentry has posted 2006 WM3 as an impact risk - see above
1630Noted that JPL Sentry has removed 2017 FN128 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 GM6 risk assessment - see above
Noted that JPL Sentry has updated its 2017 HJ risk assessment - see above
1540Noted that JPL Sentry has posted 2011 SC108 as an impact risk - see above
Noted that JPL Sentry has reposted 2013 JM22 as an impact risk - see above
Noted that JPL Sentry has reposted 2014 BZ2 as an impact risk - see above
Noted that JPL Sentry has reposted 2016 BQ15 as an impact risk - see above
Noted that JPL Sentry has posted 2016 EU84 as an impact risk - see above
Noted that JPL Sentry has reposted 2016 FV7 as an impact risk - see above
Noted that JPL Sentry has removed 2017 FO63 as an impact risk - see above
Noted that JPL Sentry has posted 2017 FW158 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 FW90 risk assessment - see above
Noted that JPL Sentry has posted 2017 GG8 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 GM7 risk assessment - see above
Grabbed MPEC 2017-H44 - Daily Orbit Update - see above
0401Noted that JPL Sentry has posted 2016 BP14 as an impact risk - see above