Contents  on 18 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 18 March '17

Six objects reported inside ten LD

Six asteroidal objects are reported passing inside ten lunar distances (LD) of Earth today, and the nearest is newly announced 2017 FK, moving in from 5.79 to 3.74 LD.

Earth passage I D ~Size Distance Today  Notes
1.74 LD March 202017 FK 11 m  3.74 from 5.79 LD NEW - MPEC
1.98 LD March 212017 FJ 8 m  5.80 from 7.79 LD NEW - MPEC
4.38 LD yesterday2017 EG3 18 m  4.50 to 5.23 LD NHATS target
7.04 LD March 162017 EE4 36 m  8.47 to 10.24 LD exits ten LD
7.63 LD March 262015 TC25 4 m  9.41 from 9.84 LD radar/NHATS target, risk
8.34 LD March 161998 SL36 309 m  9.62 to 11.63 LD exits ten LD, radar target - DOU
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 - DOU

This report was generated at 2017 UTC with the discoveries of inbound 2017 FK (MPEC) and 2017 FJ (MPEC), and with follow-up in today's DOU MPEC for departing 1998 SL36 and approaching 2017 CS as well as for departed objects 2017 DA38 and NHATS target 2017 DC36, and for distant 2001 FE90. We can also report from observation last September and November the recovery of distant radar/NHATS target 2015 XC352 (MPEC).



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 objects that have come within ten LD since A/CC began these traffic reports (2007) but are not presently so close. 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 18 March '17

The MPC's NEO Confirmation Page has 78 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 78 objects listed. Of these, 40 were "one nighters." So far The Tracking News has counted a total of 95 listings on the NEOCP today.

New MPECs  on 18 March '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-F16 - "15:16 UT" - 2017 FK


MPEC 2017-F15 - "15:13 UT" - 2017 FJ


MPEC 2017-F14 - "15:09 UT" - 2017 FH


<< DOU on 18 Mar. '17 >>  MPEC 2017-F13 - "12:04 UT" - Daily Orbit Update


MPEC 2017-F12 - "04:27 UT" - 2015 XC352

Observers  on 18 March '17

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 2 in MPECs 2017-F14 & 2017-F15 -- 2017 FJ, 2017 FH
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPECs 2017-F13 & 2017-F14 -- 2017 FH, 2017 DC36, 2017 CR32, 2017 AC5, 2006 UM, 90075, 53319, 475665, 370702, 370307, 250620, 22771, 143404, 138155, 10636, 5626, 5604, 4954, 4055, 2329, 1864
T05ATLAS Haleakala in Hawaii, 9 in MPEC 2017-F13 -- 2017 CR32, 2006 EC1, 484795, 40267, 370702, 5653, 4179, 3352, 1627
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2017-F13 -- 2006 UM, 485652, 40267, 4179, 3103
300Bisei Spaceguard Center in Japan, 4 in MPECs 2017-F13 & 2017-F16 -- 2017 FK, 11398, 10636, 5604
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-F16 -- 2017 FK
160Castelmartini Obs. in Italy, 4 in MPECs 2017-F13 & 2017-F16 -- 2017 FK, 40267, 370702, 10636
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2017-F13, 2017-F14 & 2017-F16 -- 2017 FK, 2017 FH, 2017 CR32, 2016 DP, 2013 RM43, 483459, 154652, 11398, 5189
K51Celado Obs. in Italy, 1 in MPEC 2017-F14 -- 2017 FH
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPEC 2017-F13 -- 2017 ES2, 2017 ER13, 2017 EQ13, 2017 DY108, 2017 DT15, 2017 DS36, 2017 DO109, 2017 DA38, 2017 CO5, 2017 BW32, 2017 BQ93, 2017 BE92, 2017 BE29, 2017 BC30, 2017 AO13
K65Cesena Obs. in Italy, 2 in MPECs 2017-F14 & 2017-F16 -- 2017 FK, 2017 FH
958Dax Obs. in France, 1 in MPEC 2017-F14 -- 2017 FH
151Eschenberg Obs. in Switzerland, 1 in MPEC 2017-F14 -- 2017 FH
K83Forti Obs., 4 in MPEC 2017-F13 -- 90075, 143404, 10636, 5604
K73Gravina Obs. in Italy, 3 in MPEC 2017-F13 -- 90075, 11398, 5604
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2017-F14 -- 2017 FH
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-F13 -- 137170
Q60ISON Siding Spring Obs. in New South Wales, 1 in MPEC 2017-F13 -- 21088
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-F13 & 2017-F16 -- 2017 FK, 1998 SL36
K92LCOGT Sutherland B in South Africa, 2 in MPECs 2017-F15 & 2017-F16 -- 2017 FK, 2017 FJ
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2017-F14, 2017-F15 & 2017-F16 -- 2017 FK, 2017 FJ, 2017 FH
118Modra Obs. in Slovakia, 1 in MPEC 2017-F13 -- 143404
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2017-F14, 2017-F15 & 2017-F16 -- 2017 FK, 2017 FJ, 2017 FH
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-F14 -- 2017 FH
F51Pan-STARRS 1 (PS1) in Hawaii, 24 in MPECs 2017-F13 & 2017-F14 -- 2017 FH, 2017 EW2, 2017 DR37, 2017 DM34, 2017 CS, 2008 EE68, 2002 FQ4, 2001 FE90, 1998 HK1, 484725, 481904, 481543, 477490, 469356, 413002, 391033, 363116, 325769, 252091, 230549, 22771, 162882, 162452, 1916
B49Paus Obs. in Spain, 1 in MPEC 2017-F14 -- 2017 FH
W25RMS Obs., 7 in MPECs 2017-F13 & 2017-F14 -- 2017 FH, 2017 EX2, 2017 AC5, 370702, 154652, 138155, 136635
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2017-F13, 2017-F14 & 2017-F16 -- 2017 FK, 2017 FH, 143404
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-F15 -- 2017 FJ
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-F16 -- 2017 FK
204Schiaparelli Obs. in Italy, 1 in MPEC 2017-F14 -- 2017 FH
Y00SONEAR in Brazil, 1 in MPEC 2017-F13 -- 143404
587Sormano Obs. in Italy, 1 in MPEC 2017-F14 -- 2017 FH
691Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2017-F13 -- 2017 EJ3, 2017 DS35, 2017 CR32, 2017 AP20, 2015 BY310, 2003 EZ16, 235086, 4055
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2017-F13 & 2017-F14 -- 2017 FH, 2017 ED3, 2017 EC3, 2016 YP4, 2016 VV3, 2014 NA64, 2004 SW55
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2017-F14 -- 2017 FH
926Tenagra II Obs. in Arizona, 5 in MPECs 2017-F13, 2017-F14 & 2017-F16 -- 2017 FK, 2017 FH, 2017 ET22, 2017 ES2, 2017 ER22
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-F12 -- 2015 XC352
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2017-F13 -- 2017 EC, 485652, 317255
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 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 EQ13NEODyS1635R E M O V E D-
JPL Sentry1527R E M O V E DJPL: Risk listing removed at 1505 UTC.
2017 ET2NEODyS1527211211.66e-09-9.51-9.510NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2017-03-05.343 to 2017-03-16.330."
2017 BL30NEODyS15272098-210921.34e-08-7.42-7.460NEODyS: "Based on 325 optical observations (of which 0 are rejected as outliers) from 2017-01-28.379 to 2017-03-08.205."
2016 RD34NEODyS15272051-21164304.17e-03-3.75-4.560NEODyS: "Based on 81 optical observations (of which 2 are rejected as outliers) from 2016-09-11.431 to 2016-12-22.326."

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 18 March '17

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

2017Generated Traffic Report
1635Noted that NEODyS has removed 2017 EQ13 as an impact risk - see above
1527Noted that NEODyS has updated its 2016 RD34 risk assessment - see above
Noted that NEODyS has updated its 2017 BL30 risk assessment - see above
Noted that JPL Sentry has removed 2017 EQ13 as an impact risk - see above
Noted that NEODyS has updated its 2017 ET2 risk assessment - see above
Grabbed MPEC 2017-F13 - Daily Orbit Update - see above
Grabbed MPEC 2017-F14 - 2017 FH - see above
Grabbed MPEC 2017-F15 - 2017 FJ - see above
Grabbed MPEC 2017-F16 - 2017 FK - see above
0530Grabbed MPEC 2017-F12 - 2015 XC352 - see above