Contents  on 24 March '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 24 March '17

Eight objects reported inside ten LD

Inside our traffic reporting zone, with a radius of ten lunar distances (LD) from Earth's center, there are today eight minor objects reported. The nearest is risk-listed NHATS target 2017 FZ2, which leaves our planet's sphere of gravitational influence (SOI) and comes its closest to the Moon on this passage -- 2.49 LD at 0638 UTC.

Earth passage I D ~Size Distance Today  Notes
0.33 LD March 202017 FM1 4 m  6.99 to 9.27 LD intruder
1.70 LD yesterday2017 FZ2 15 m  1.72 to 2.75 LD exits Earth SOI, Moon closest 2.49 LD at 0638 UTC, NHATS target, risk - DOU
1.74 LD March 202017 FK 11 m  7.92 to 10.09 LD exits ten LD, NHATS target
1.98 LD March 212017 FJ 8 m  5.31 to 7.27 LD NHATS target
2.57 LD March 222017 FJ3 4 m  2.63 to 2.77 LD NHATS target
4.16 LD March 262017 FL63 21 m  8.70 from 12.26 LD enters ten LD
5.75 LD March 272017 FF3 14 m  5.91 from 6.09 LD NHATS target
7.63 LD March 262015 TC25 4 m  7.72 from 7.87 LD radar/NHATS target, risk
Approaching
3.8   LD April 62017 FU64 62 m  < 10 LD April 4, NEW, uncertainty +/- 32 mins., risk - MPEC
4.57 LD April 192014 JO25 812 m  < 10 LD April 18, radar target
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target - DOU
9.02 LD April 22017 FV 47 m  < 10 LD March 31, radar target, risk - DOU
9.08 LD March 272017 FK3 21 m  < 10 LD tomorrow

This report was updated at 2353 UTC with the discoveries of approaching risk-listed 2017 FU64 (MPEC) and two already departed objects: 2017 FC65 (MPEC), which flew past Earth at 5.55 LD on March 20th, and 2017 FL64 (MPEC), which went by at 5.01 LD on March 5th.
        Your first flying rocks traffic report was generated at 1750 UTC with follow-up in today's DOU MPEC for 2017 FZ2 and two other objects in the traffic table here, and for departed objects NHATS target 2017 FQ63 and radar target 1998 SL36.



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.

Radar Astrometry  on 24 March '17

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1906 UTC when the database was dated 24 March


Data update noted at 2310 UTC when the database was dated 24 March

NEOCP Activity  on 24 March '17

The MPC's NEO Confirmation Page has 58 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 58 objects listed. Of these, 22 were "one nighters." So far The Tracking News has counted a total of 98 listings on the NEOCP today.

New MPECs  on 24 March '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 22 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-F120 - "21:20 UT" - 2017 FF65


MPEC 2017-F119 - "21:17 UT" - 2017 FE65


MPEC 2017-F118 - "21:13 UT" - 2017 FD65


MPEC 2017-F117 - "21:10 UT" - 2017 FB65


MPEC 2017-F116 - "21:06 UT" - 2017 FC65


MPEC 2017-F115 - "21:03 UT" - 2017 FA65


MPEC 2017-F114 - "21:00 UT" - 2017 FZ64


MPEC 2017-F113 - "20:56 UT" - 2017 FY64


MPEC 2017-F112 - "20:52 UT" - 2017 FX64


MPEC 2017-F111 - "20:49 UT" - 2017 FW64


MPEC 2017-F110 - "20:46 UT" - 2017 FV64


MPEC 2017-F109 - "20:42 UT" - 2017 FU64


MPEC 2017-F108 - "20:39 UT" - 2017 FT64


MPEC 2017-F107 - "20:36 UT" - 2017 FS64


MPEC 2017-F106 - "20:32 UT" - 2017 FR64


MPEC 2017-F105 - "20:29 UT" - 2017 FQ64


MPEC 2017-F104 - "20:25 UT" - 2017 FP64


MPEC 2017-F103 - "20:22 UT" - 2017 FO64


MPEC 2017-F102 - "20:18 UT" - 2017 FN64


MPEC 2017-F101 - "20:14 UT" - 2017 FM64


MPEC 2017-F100 - "20:11 UT" - 2017 FL64


<< DOU on 24 Mar. '17 >>  MPEC 2017-F99 - "12:05 UT" - Daily Orbit Update

Observers  on 24 March '17

A total of 35 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 1 in MPEC 2017-F101 -- 2017 FM64
H21Astronomical Research Obs. Westfield in Illinois, 25 in MPECs 2017-F99, 2017-F105, 2017-F112, 2017-F114, 2017-F115, 2017-F116, 2017-F117 & 2017-F120 -- 2017 FZ64, 2017 FX64, 2017 FQ64, 2017 FF65, 2017 FC65, 2017 FB65, 2017 FA65, 2017 EP22, 2017 EN, 2017 EH4, 2017 ED4, 2017 EC, 2017 DT37, 2017 DR37, 2017 DR36, 2017 DM34, 2017 DC38, 2017 CR32, 2017 BG85, 2008 XW2, 2003 XV10, 456651, 277473, 252091, 162452
T05ATLAS Haleakala in Hawaii, 10 in MPEC 2017-F99 -- 443103, 413002, 22771, 193178, 138404, 7341, 4954, 3199, 1864, 1036
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-F99 -- 2006 UM
300Bisei Spaceguard Center in Japan, 2 in MPECs 2017-F99 & 2017-F111 -- 2017 FW64, 2017 FQ63
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-F114 -- 2017 FZ64
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2017-F99 -- 2017 FD1, 483459, 40267, 317255, 226198, 10636, 5693, 5653, 4179, 4055
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2017-F99, 2017-F102, 2017-F110, 2017-F118 & 2017-F119 -- 2017 FY2, 2017 FV64, 2017 FT2, 2017 FP, 2017 FN64, 2017 FE65, 2017 FE3, 2017 FD65, 2017 DQ36, 2017 DD
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2017-F99 -- 2017 CR32
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2017-F99 & 2017-F111 -- 2017 FW64, 89830
253Goldstone DSS-14 70m antenna in southern California, 2 in radar -- 1998 SL36, 5604
K73Gravina Obs. in Italy, 1 in MPEC 2017-F99 -- 11398
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-F99 -- 1998 SL36
W86LCOGT Cerro Tololo B in Chile, 2 in MPECs 2017-F110 & 2017-F119 -- 2017 FV64, 2017 FE65
V37LCOGT Fort Davis in Texas, 2 in MPECs 2017-F109 & 2017-F115 -- 2017 FU64, 2017 FA65
T04LCOGT Haleakala OGG B#2 in Hawaii, 1 in MPEC 2017-F104 -- 2017 FP64
K91LCOGT Sutherland A in South Africa, 2 in MPECs 2017-F101 & 2017-F102 -- 2017 FN64, 2017 FM64
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-F99 -- 2017 AC5
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2017-F112, 2017-F114 & 2017-F116 -- 2017 FZ64, 2017 FX64, 2017 FC65
568_Marco Micheli on Mauna Kea in Hawaii, 10 in MPECs 2017-F99, 2017-F106, 2017-F107, 2017-F108, 2017-F109, 2017-F110, 2017-F115, 2017-F118 & 2017-F119 -- 2017 FV64, 2017 FU64, 2017 FT64, 2017 FS64, 2017 FR64, 2017 FO63, 2017 FE65, 2017 FE63, 2017 FD65, 2017 FA65
474Mt. John Obs. in New Zealand, 1 in MPEC 2017-F111 -- 2017 FW64
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2017-F99, 2017-F103, 2017-F111, 2017-F112, 2017-F114, 2017-F116, 2017-F117 & 2017-F120 -- 2017 FZ64, 2017 FX64, 2017 FW64, 2017 FO64, 2017 FF65, 2017 FC65, 2017 FB65, 2017 EH1, 240320, 7335
F51Pan-STARRS 1 (PS1) in Hawaii, 28 in MPECs 2017-F99, 2017-F100, 2017-F101, 2017-F102, 2017-F103, 2017-F105, 2017-F106, 2017-F107, 2017-F108, 2017-F109, 2017-F110, 2017-F113, 2017-F115, 2017-F116, 2017-F118, 2017-F119 & 2017-F120 -- 2017 FY64, 2017 FV64, 2017 FU64, 2017 FT64, 2017 FS64, 2017 FR64, 2017 FQ64, 2017 FQ, 2017 FO64, 2017 FN64, 2017 FM64, 2017 FL64, 2017 FF65, 2017 FE65, 2017 FD65, 2017 FC65, 2017 FA65, 2017 EH1, 2016 UU80, 2013 YK148, 2013 NV6, 2006 UM, 2003 WW87, 483459, 386259, 190166, 141527, 136793
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 22 in MPEC 2017-F99 -- 2017 EC, 2017 CS, 2017 CR32, 2017 AC5, 90075, 89830, 485652, 40267, 370702, 370307, 317255, 250620, 175189, 152931, 143404, 11398, 10636, 5653, 5604, 4179, 3352, 1627
W25RMS Obs., 3 in MPECs 2017-F104, 2017-F111 & 2017-F112 -- 2017 FX64, 2017 FW64, 2017 FP64
L04ROASTERR-1 in Romania, 2 in MPEC 2017-F99 -- 2017 AC5, 11398
G25Sherbrooke Obs. in Quebec, 1 in MPEC 2017-F99 -- 3103
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-F99 -- 141018
W887program code 7 via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-F99 -- 1998 SL36
691Spacewatch 0.9m telescope in Arizona, 10 in MPECs 2017-F99, 2017-F106, 2017-F109, 2017-F115 & 2017-F119 -- 2017 FU64, 2017 FR64, 2017 FE65, 2017 FA65, 2017 EC3, 2016 XD1, 2016 VV3, 2016 RF40, 2016 LE9, 2009 FF19
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2017-F100, 2017-F101, 2017-F102, 2017-F105, 2017-F107, 2017-F108, 2017-F110 & 2017-F118 -- 2017 FV64, 2017 FT64, 2017 FS64, 2017 FQ64, 2017 FN64, 2017 FM64, 2017 FL64, 2017 FD65
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2017-F112 & 2017-F114 -- 2017 FZ64, 2017 FX64
I52Steward Obs. Mt. Lemmon Station in Arizona, 12 in MPECs 2017-F99, 2017-F103, 2017-F104, 2017-F106, 2017-F109, 2017-F111, 2017-F112, 2017-F113, 2017-F114, 2017-F116, 2017-F117 & 2017-F120 -- 2017 FZ64, 2017 FY64, 2017 FX64, 2017 FW64, 2017 FU64, 2017 FR64, 2017 FP64, 2017 FO64, 2017 FF65, 2017 FC65, 2017 FB65, 2017 ED3
926Tenagra II Obs. in Arizona, 18 in MPECs 2017-F99, 2017-F102, 2017-F103, 2017-F104, 2017-F105, 2017-F106, 2017-F111, 2017-F112, 2017-F113, 2017-F114, 2017-F116, 2017-F117, 2017-F118, 2017-F119 & 2017-F120 -- 2017 FZ64, 2017 FZ2, 2017 FY64, 2017 FX64, 2017 FW64, 2017 FR64, 2017 FQ64, 2017 FP64, 2017 FO64, 2017 FN64, 2017 FL1, 2017 FF65, 2017 FE65, 2017 FD65, 2017 FD1, 2017 FC65, 2017 FC1, 2017 FB65
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2017-F99 & 2017-F104 -- 2017 FZ2, 2017 FV, 2017 FP64, 2017 FC3, 2017 FC1
C51WISE in Earth polar orbit, 1 in MPEC 2017-F104 -- 2017 FP64
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 March '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 JPL NEO Program 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 FU64JPL Sentry2310204313.8e-07-5.33-5.330JPL: "Analysis based on 23 observations spanning 3.0402 days (2017-Mar-21.35113 to 2017-Mar-24.39137)." Diameter approximately 0.061 km. from mean, weighted H=23.7.
2017 FL64JPL Sentry23582109-211121.7e-06-8.04-8.050JPL: "Analysis based on 10 observations spanning 5.9334 days (2017-Mar-18.34675 to 2017-Mar-24.28012)." Diameter approximately 0.006 km. from mean, weighted H=28.6.
2017 FO63NEODyS19062073-2108155.43e-07-5.34-5.540NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2017-03-21.391 to 2017-03-23.236."
JPL Sentry15462090-210871.2e-06-4.96-5.170JPL: "Analysis based on 20 observations spanning 1.8449 days (2017-Mar-21.38988 to 2017-Mar-23.234808)." Diameter approximately 0.068 km. from mean, weighted H=23.5.
2017 FC3NEODyS19062039-2066591.09e-05-4.01-4.310NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2017-03-19.326 to 2017-03-23.411."
JPL Sentry17302032-2066501.5e-05-3.89-4.400JPL #2 for the day: "Analysis based on 13 observations spanning 4.0851 days (2017-Mar-19.32518 to 2017-Mar-23.410255)." Diameter approximately 0.065 km. from mean, weighted H=23.6.
2017 FZ2JPL Sentry17302101-210433.8e-06-6.59-6.600JPL #2 for the day: "Analysis based on 114 observations spanning 4.9481 days (2017-Mar-19.34252 to 2017-Mar-24.290593)." Diameter approximately 0.015 km. from mean, weighted H=26.7.
2017 FC1NEODyS1906206411.14e-05-5.46-5.460NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2017-03-14.416 to 2017-03-24.236."
JPL Sentry1730206411.2e-06-6.43-6.430JPL #2 for the day: "Analysis based on 48 observations spanning 9.8200 days (2017-Mar-14.415078 to 2017-Mar-24.23507)." Diameter approximately 0.022 km. from mean, weighted H=25.9.
2017 FVJPL Sentry17302103-211683.0e-06-5.47-5.900JPL #2 for the day: "Analysis based on 28 observations spanning 6.1479 days (2017-Mar-17.26524 to 2017-Mar-23.413112)." Diameter approximately 0.042 km. from mean, weighted H=24.5.

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 24 March '17

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

2358Noted that JPL Sentry has posted 2017 FL64 as an impact risk - see above
2353Updated Traffic Report
2310Noted that JPL Sentry has posted 2017 FU64 as an impact risk - see above
Noted Radar Astrometry database update - see above
2215Grabbed MPEC 2017-F116 - 2017 FC65 - see above
Grabbed MPEC 2017-F117 - 2017 FB65 - see above
Grabbed MPEC 2017-F118 - 2017 FD65 - see above
Grabbed MPEC 2017-F119 - 2017 FE65 - see above
Grabbed MPEC 2017-F120 - 2017 FF65 - see above
2106Grabbed MPEC 2017-F100 - 2017 FL64 - see above
Grabbed MPEC 2017-F101 - 2017 FM64 - see above
Grabbed MPEC 2017-F102 - 2017 FN64 - see above
Grabbed MPEC 2017-F103 - 2017 FO64 - see above
Grabbed MPEC 2017-F104 - 2017 FP64 - see above
Grabbed MPEC 2017-F105 - 2017 FQ64 - see above
Grabbed MPEC 2017-F106 - 2017 FR64 - see above
Grabbed MPEC 2017-F107 - 2017 FS64 - see above
Grabbed MPEC 2017-F108 - 2017 FT64 - see above
Grabbed MPEC 2017-F109 - 2017 FU64 - see above
Grabbed MPEC 2017-F110 - 2017 FV64 - see above
Grabbed MPEC 2017-F111 - 2017 FW64 - see above
Grabbed MPEC 2017-F112 - 2017 FX64 - see above
Grabbed MPEC 2017-F113 - 2017 FY64 - see above
Grabbed MPEC 2017-F114 - 2017 FZ64 - see above
Grabbed MPEC 2017-F115 - 2017 FA65 - see above
1906Noted that NEODyS has updated its 2017 FC1 risk assessment - see above
Noted that NEODyS has updated its 2017 FC3 risk assessment - see above
Noted that NEODyS has posted 2017 FO63 as an impact risk - see above
Noted Radar Astrometry database update - see above
1730Noted that JPL Sentry has updated its 2017 FC1 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FC3 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FV risk assessment - see above
Noted that JPL Sentry has updated its 2017 FZ2 risk assessment - see above
1632Noted that JPL Sentry has updated its 2017 FZ2 risk assessment - see above
1546Noted that JPL Sentry has updated its 2017 FC1 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FC3 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FO63 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FV risk assessment - see above
Grabbed MPEC 2017-F99 - Daily Orbit Update - see above