Contents  on 19 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 19 March '17

Five objects reported inside ten LD

Today there are five minor objects reported traveling less than ten lunar distances (LD) from our home world. Nearest but now heading away is newly announced intruder 2017 FS, which was discovered early on March 17th out at 8.56 LD. It entered the Earth-Moon system late yesterday, flew past us at 0.28 LD at 0332 UTC this morning, and will end the day out at 3.82 LD, beyond Earth's SOI (sphere of gravitational influence).

Earth passage I D ~Size Distance Today  Notes
0.28 LD today2017 FS 5 m  0.28 LD NEW, intruder today, Earth closest at 0332 UTC, Moon closest 1.17 LD at 0214 UTC - MPEC
1.74 LD tomorrow2017 FK 11 m  2.06 from 3.74 LD enters Earth SOI - DOU
1.98 LD March 212017 FJ 8 m  3.92 from 5.80 LD DOU
4.38 LD March 172017 EG3 18 m  5.23 to 6.43 LD NHATS target
7.63 LD March 262015 TC25 4 m  9.01 from 9.41 LD radar/NHATS target, risk
Approaching
4.57 LD April 192014 JO25 812 m  < 10 LD April 18, radar target
7.93 LD May 292017 CS 437 m  < 10 LD May 26, radar target
9.1   LD April 22017 FV 46 m  < 10 LD March 31, NEW, uncertainty +/- 34 mins., risk - MPEC

This report was generated at 1906 UTC with four discoveries: intruder 2017 FS (MPEC), approaching 2017 FV (MPEC), and two already departed objects: 2017 FW (MPEC), which passed Earth at 4.44 LD on March 14th, and 2017 FR (MPEC), which went by at about 5.8 LD on March 5th. Today's DOU MPEC has follow-up for two objects in the traffic table here plus seven departd objects: 2017 EL4, 2017 EF4, 2017 EE4, 2017 EE3, 2017 EK, NHATS target 2017 DA36, and risk-listed radar/NHATS target 2016 TB57.



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 19 March '17

The MPC's NEO Confirmation Page has 83 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 83 objects listed. Of these, 47 were "one nighters." So far The Tracking News has counted a total of 110 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 19 March '17

Minor Planet Electronic Circulars

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


MPEC 2017-F29 - "14:25 UT" - 2017 FT


MPEC 2017-F28 - "14:21 UT" - 2017 FS


MPEC 2017-F27 - "14:14 UT" - 2017 FW


MPEC 2017-F26 - "14:10 UT" - 2017 FV


MPEC 2017-F25 - "14:07 UT" - 2017 FU


MPEC 2017-F24 - "14:03 UT" - 2017 FR


MPEC 2017-F23 - "13:59 UT" - 2017 FQ


MPEC 2017-F22 - "13:54 UT" - 2017 FP


MPEC 2017-F21 - "13:50 UT" - 2017 FO


MPEC 2017-F20 - "13:47 UT" - 2017 FN


MPEC 2017-F19 - "12:52 UT" - 2013 EV89


MPEC 2017-F18 - "12:50 UT" - 2004 FD4


<< DOU on 19 Mar. '17 >>  MPEC 2017-F17 - "12:04 UT" - Daily Orbit Update

Observers  on 19 March '17

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 20 in MPECs 2017-F17, 2017-F19, 2017-F20, 2017-F22, 2017-F25, 2017-F26, 2017-F28 & 2017-F29 -- 2017 FV, 2017 FU, 2017 FT, 2017 FS, 2017 FP, 2017 FN, 2017 ET2, 2017 ET, 2017 EL4, 2017 EK4, 2017 EJ4, 2017 EJ3, 2017 EF4, 2017 ED3, 2017 DQ35, 2017 DK109, 2017 BL123, 2016 HD19, 2014 KV84, 2013 EV89
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPECs 2017-F17, 2017-F24 & 2017-F29 -- 2017 FT, 2017 FR, 2017 ET2, 2017 DO109, 2017 DK109, 2017 CR32, 2017 AC5, 2006 UM, 90075, 53319, 475665, 40267, 370702, 22771, 143404, 11398, 10636, 5604, 4954, 3103, 1864
T05ATLAS Haleakala in Hawaii, 6 in MPEC 2017-F17 -- 2006 UM, 96590, 226198, 11398, 3691, 3103
T08ATLAS Mauna Loa in Hawaii, 15 in MPEC 2017-F17 -- 90075, 443103, 413002, 388838, 370702, 252091, 22771, 143404, 138155, 137158, 10636, 5604, 4055, 3199, 2329
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-F23 -- 2017 FQ
300Bisei Spaceguard Center in Japan, 2 in MPECs 2017-F23 & 2017-F29 -- 2017 FT, 2017 FQ
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-F25 -- 2017 FU
160Castelmartini Obs. in Italy, 11 in MPECs 2017-F17 & 2017-F23 -- 2017 FQ, 2017 CR32, 2017 AC5, 2016 LS9, 2006 EC1, 480004, 317255, 138155, 137158, 5626, 4055
703Catalina Sky Survey (CSS) in Arizona, 20 in MPECs 2017-F17 & 2017-F23 -- 2017 FQ, 2017 DC38, 2013 RM43, 2006 UM, 2006 EC1, 486607, 484517, 483459, 40267, 388838, 374038, 317255, 25916, 175189, 10636, 5693, 5626, 5189, 4055, 3552
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2017-F17 & 2017-F20 -- 2017 FN, 2017 CW1, 2017 BL123, 2016 YQ8, 2016 YM1, 2016 XZ23
K65Cesena Obs. in Italy, 1 in MPEC 2017-F24 -- 2017 FR
958Dax Obs. in France, 2 in MPECs 2017-F23 & 2017-F29 -- 2017 FT, 2017 FQ
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-F17 -- 381906
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-F17 & 2017-F23 -- 2017 FQ, 2003 OV
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-F24 -- 2017 FR
H01Magdalena Ridge Obs. (MRO) in New Mexico, 9 in MPECs 2017-F20, 2017-F21, 2017-F22, 2017-F23, 2017-F24, 2017-F25, 2017-F26, 2017-F28 & 2017-F29 -- 2017 FV, 2017 FU, 2017 FT, 2017 FS, 2017 FR, 2017 FQ, 2017 FP, 2017 FO, 2017 FN
C94MASTER-II Tunka in Russia, 3 in MPEC 2017-F17 -- 5653, 4179, 3352
474Mt. John Obs. in New Zealand, 3 in MPECs 2017-F17, 2017-F18 & 2017-F27 -- 2017 FW, 2017 ER13, 2004 FD4
G96Mt. Lemmon Survey (MLS) in Arizona, 35 in MPECs 2017-F17, 2017-F18, 2017-F21, 2017-F22, 2017-F23, 2017-F24, 2017-F25, 2017-F26, 2017-F27, 2017-F28 & 2017-F29 -- 2017 FW, 2017 FV, 2017 FU, 2017 FT, 2017 FS, 2017 FR, 2017 FQ, 2017 FP, 2017 FO, 2017 EJ3, 2016 YM1, 2014 GD45, 2013 RD32, 2011 QP96, 2009 FR30, 2004 FD4, 2000 EM26, 65803, 485823, 484506, 432226, 414990, 388838, 370307, 308899, 277810, 274138, 18109, 175189, 152671, 144898, 138155, 7480, 7474, 5131
F51Pan-STARRS 1 (PS1) in Hawaii, 27 in MPECs 2017-F17, 2017-F20 & 2017-F22 -- 2017 FP, 2017 FN, 2017 FJ, 2017 EY2, 2017 EH1, 2017 DS36, 2017 AC5, 2012 ET14, 2010 UD, 2009 EM1, 2008 EY68, 2000 UG11, 482391, 471240, 469513, 388798, 374038, 318050, 302311, 276111, 18109, 175189, 175114, 159495, 154347, 5626, 3552
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 18 in MPEC 2017-F17 -- 2017 EC, 2013 OE, 96590, 90075, 54789, 485652, 370702, 347813, 317255, 250620, 152931, 11398, 10636, 5653, 5604, 4179, 3352, 1627
W25RMS Obs., 1 in MPEC 2017-F22 -- 2017 FP
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-F23 -- 2017 FQ
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-F23 -- 2017 FQ
B74Santa Maria de Montmagastrell Obs. in Spain, 2 in MPECs 2017-F23 & 2017-F24 -- 2017 FR, 2017 FQ
204Schiaparelli Obs. in Italy, 23 in MPECs 2017-F17, 2017-F23 & 2017-F28 -- 2017 FS, 2017 FQ, 2017 FK, 2017 EX2, 2017 EU, 2017 EK3, 2017 EK, 2017 EH4, 2017 EE4, 2017 EE3, 2017 EC, 2017 DZ108, 2017 DY37, 2017 DW34, 2017 DE38, 2017 DB109, 2017 DA36, 2017 CR32, 2013 YK148, 2006 EC1, 485051, 484506, 483656
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-F17 -- 143404
Y00SONEAR in Brazil, 1 in MPEC 2017-F17 -- 193178
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2017-F17, 2017-F18, 2017-F22, 2017-F23, 2017-F24 & 2017-F25 -- 2017 FU, 2017 FR, 2017 FQ, 2017 FP, 2016 SD, 2016 LE9, 2004 FD4, 144898
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2017-F17, 2017-F20 & 2017-F28 -- 2017 FS, 2017 FN, 2016 TB57, 438955
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-F17 -- 143404
I93St. Pardon de Conques Obs. in France, 6 in MPECs 2017-F21, 2017-F22, 2017-F23, 2017-F25, 2017-F27 & 2017-F29 -- 2017 FW, 2017 FU, 2017 FT, 2017 FQ, 2017 FP, 2017 FO
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-F23 -- 2017 FQ
926Tenagra II Obs. in Arizona, 3 in MPECs 2017-F17, 2017-F23 & 2017-F29 -- 2017 FT, 2017 FQ, 2017 CN1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 FVJPL Sentry16272100-2116274.7e-06-5.18-5.610JPL: "Analysis based on 19 observations spanning 2.0567 days (2017-Mar-17.26524 to 2017-Mar-19.32196)." Diameter approximately 0.046 km. from mean, weighted H=24.4.
2017 ET2NEODyS1812211213.68e-09-9.12-9.120NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2017-03-05.343 to 2017-03-18.301."
JPL Sentry1552211217.8e-08-7.78-7.780JPL: "Analysis based on 25 observations spanning 12.958 days (2017-Mar-05.34237 to 2017-Mar-18.299926)." Diameter approximately 0.024 km. from mean, weighted H=25.8.
2016 TB57NEODyS18122099-211232.41e-09-9.65-9.870NEODyS: "Based on 125 optical observations (of which 2 are rejected as outliers) from 2016-09-12.527 to 2017-03-19.329."

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 19 March '17

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

1906Generated Traffic Report
1812Noted that NEODyS has updated its 2016 TB57 risk assessment - see above
Noted that NEODyS has updated its 2017 ET2 risk assessment - see above
1627Noted that JPL Sentry has posted 2017 FV as an impact risk - see above
1552Noted that JPL Sentry has updated its 2017 ET2 risk assessment - see above
Grabbed MPEC 2017-F17 - Daily Orbit Update - see above
Grabbed MPEC 2017-F18 - 2004 FD4 - see above
Grabbed MPEC 2017-F19 - 2013 EV89 - see above
Grabbed MPEC 2017-F20 - 2017 FN - see above
Grabbed MPEC 2017-F21 - 2017 FO - see above
Grabbed MPEC 2017-F22 - 2017 FP - see above
Grabbed MPEC 2017-F23 - 2017 FQ - see above
Grabbed MPEC 2017-F24 - 2017 FR - see above
Grabbed MPEC 2017-F25 - 2017 FU - see above
Grabbed MPEC 2017-F26 - 2017 FV - see above
Grabbed MPEC 2017-F27 - 2017 FW - see above
Grabbed MPEC 2017-F28 - 2017 FS - see above
Grabbed MPEC 2017-F29 - 2017 FT - see above