Contents  on 10 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 10 March '17

Nine objects reported inside ten LD

There are nine asteroidal reported inside ten lunar distances (LD) of our planet today. NHATS target 2017 DA36 is the nearest of the bunch and comes its closest this time around -- 4.05 LD at 2209 UTC.

Earth passage I D ~Size Distance Today  Notes
2.78 LD March 52017 EV 15 m  8.47 to 10.29 LD exits ten LD, NHATS target - DOU
4.05 LD today2017 DA36 32 m  4.05 LD NHATS target, Earth closest at 2209 UTC - DOU
4.48 LD March 72017 EW 13 m  7.76 to 10.02 LD exits ten LD
4.96 LD March 132017 EK 53 m  9.84 from 12.39 LD enters ten LD - DOU
5.35 LD March 22017 ED 19 m  9.94 to 10.90 LD exits ten LD, NHATS target - DOU
5.86 LD March 82017 EZ2 32 m  6.45 to 7.73 LD NEW - MPEC, DOU
7.43 LD March 72017 EF 13 m  9.42 to 10.87 LD exits ten LD
7.77 LD tomorrow2017 EE3 22 m  7.95 from 8.58 LD NEW - MPEC, DOU
9.65 LD March 82017 DV35 12 m  9.71 to 9.83 LD NHATS target

This report was generated at 1910 UTC with new discoveries 2017 EG3 (MPEC), 2017 EE3 (MPEC, DOU), and 2017 EZ2 (MPEC, DOU), and with follow-up in today's DOU MPEC for four objects in the traffic tables here plus three departed objects: 2017 DC36, NHATS target 2017 DA38, and risk-listed 2017 EJ1, plus distant 357439 2004 BL86.

Approaching (sorted by 10-LD bubble entry date)
4.38 LD March 172017 EG3 18 m  < 10 LD March 12, NEW - MPEC
8.34 LD March 161998 SL36 309 m  < 10 LD March 14, radar target
7.63 LD March 262015 TC25 4 m  < 10 LD March 17, radar/NHATS target, risk
4.57 LD April 192014 JO25 812 m  < 10 LD April 18, radar target
7.92 LD May 292017 CS 434 m  < 10 LD May 26, radar target



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 since A/CC began these traffic reports ten years ago but is not now 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 10 March '17

The MPC's NEO Confirmation Page has 67 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 67 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 127 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 10 March '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 20 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 10 Mar. '17 >>  MPEC 2017-E80 - "13:27 UT" - Daily Orbit Update


MPEC 2017-E79 - "03:24 UT" - 2017 EK3


MPEC 2017-E78 - "03:20 UT" - 2017 EJ3


MPEC 2017-E77 - "03:16 UT" - 2017 EH3


MPEC 2017-E76 - "03:12 UT" - 2017 EG3


MPEC 2017-E75 - "02:54 UT" - 2017 EF3


MPEC 2017-E74 - "02:50 UT" - 2017 EE3


MPEC 2017-E73 - "02:45 UT" - 2017 ED3


MPEC 2017-E72 - "02:41 UT" - 2017 EC3


MPEC 2017-E71 - "02:37 UT" - 2017 EB3


MPEC 2017-E70 - "02:33 UT" - 2017 EA3


MPEC 2017-E69 - "02:28 UT" - 2017 EZ2


MPEC 2017-E68 - "02:23 UT" - 2017 EY2


MPEC 2017-E67 - "02:18 UT" - 2017 EX2


MPEC 2017-E66 - "02:10 UT" - 2017 EV2


MPEC 2017-E65 - "02:05 UT" - 2017 EU2


MPEC 2017-E64 - "02:01 UT" - 2017 ET2


MPEC 2017-E63 - "01:45 UT" - 2017 EW2


MPEC 2017-E62 - "01:40 UT" - 2017 ES2


MPEC 2017-E61 - "01:33 UT" - 2017 ER2

Observers  on 10 March '17

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2017-E67, 2017-E69, 2017-E74 & 2017-E80 -- 2017 EZ2, 2017 EX2, 2017 EV, 2017 EE3, 2017 DC36, 2017 BL32, 2017 BL30, 2000 UW13, 90075, 54789, 357439, 3352, 1036
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-E70 -- 2017 EA3
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-E69 -- 2017 EZ2
300Bisei Spaceguard Center in Japan, 4 in MPECs 2017-E68, 2017-E69, 2017-E70 & 2017-E79 -- 2017 EZ2, 2017 EY2, 2017 EK3, 2017 EA3
160Castelmartini Obs. in Italy, 9 in MPECs 2017-E68, 2017-E69, 2017-E70 & 2017-E80 -- 2017 EZ2, 2017 EY2, 2017 EA3, 2013 EW27, 474549, 347813, 11398, 5626, 433
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2017-E68, 2017-E69 & 2017-E70 -- 2017 EZ2, 2017 EY2, 2017 EA3
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 13 in MPECs 2017-E61, 2017-E62, 2017-E65, 2017-E66 & 2017-E80 -- 2017 EV2, 2017 EU2, 2017 ES2, 2017 ER2, 2017 EO, 2017 EN, 2017 EL, 2017 EK, 2017 EJ1, 2017 ED, 2017 DT37, 2017 DS36, 2017 DA38
Z99Clixby Obs. in England, 3 in MPECs 2017-E68, 2017-E69 & 2017-E70 -- 2017 EZ2, 2017 EY2, 2017 EA3
958Dax Obs. in France, 1 in MPEC 2017-E69 -- 2017 EZ2
G37Discovery Channel Telescope (DCT) in Arizona, 4 in MPECs 2017-E69, 2017-E70, 2017-E74 & 2017-E79 -- 2017 EZ2, 2017 EK3, 2017 EE3, 2017 EA3
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-E69 -- 2017 EZ2
J95Great Shefford Obs. in England, 2 in MPECs 2017-E69 & 2017-E74 -- 2017 EZ2, 2017 EE3
Q60ISON Siding Spring Obs. in New South Wales, 2 in MPEC 2017-E80 -- 475665, 141018
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-E69 -- 2017 EZ2
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-E69 & 2017-E70 -- 2017 EZ2, 2017 EA3
V37LCOGT Fort Davis in Texas, 1 in MPEC 2017-E64 -- 2017 ET2
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-E80 -- 3122
K92LCOGT Sutherland B in South Africa, 2 in MPECs 2017-E62 & 2017-E66 -- 2017 EV2, 2017 ES2
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-E65 -- 2017 EU2
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 2 in MPECs 2017-E68 & 2017-E70 -- 2017 EY2, 2017 EA3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 14 in MPECs 2017-E66, 2017-E67, 2017-E68, 2017-E69, 2017-E70, 2017-E71, 2017-E72, 2017-E73, 2017-E74, 2017-E75, 2017-E76, 2017-E77, 2017-E78 & 2017-E79 -- 2017 EZ2, 2017 EY2, 2017 EX2, 2017 EV2, 2017 EK3, 2017 EJ3, 2017 EH3, 2017 EG3, 2017 EF3, 2017 EE3, 2017 ED3, 2017 EC3, 2017 EB3, 2017 EA3
108Montelupo Obs. in Italy, 1 in MPEC 2017-E69 -- 2017 EZ2
G96Mt. Lemmon Survey (MLS) in Arizona, 40 in MPECs 2017-E67, 2017-E68, 2017-E69, 2017-E70, 2017-E72, 2017-E74, 2017-E75, 2017-E76, 2017-E77, 2017-E78, 2017-E79 & 2017-E80 -- 2017 EZ2, 2017 EY2, 2017 EX2, 2017 EK3, 2017 EJ3, 2017 EH3, 2017 EG3, 2017 EF3, 2017 EE3, 2017 EC3, 2017 EA3, 2017 DM34, 2017 CR32, 2017 CN1, 2016 DP, 2015 BY310, 2011 ED78, 2010 DP, 2006 EC1, 85804, 65803, 54789, 482228, 452389, 39796, 391275, 374038, 361532, 347813, 345646, 333555, 288914, 240320, 173561, 164120, 163070, 154144, 7088, 5131, 3552
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2017-E61, 2017-E62, 2017-E63, 2017-E64, 2017-E65, 2017-E66, 2017-E71, 2017-E73, 2017-E74, 2017-E77 & 2017-E79 -- 2017 EW2, 2017 EV2, 2017 EU2, 2017 ET2, 2017 ES2, 2017 ER2, 2017 EK3, 2017 EH3, 2017 EE3, 2017 ED3, 2017 EB3
B49Paus Obs. in Spain, 1 in MPEC 2017-E69 -- 2017 EZ2
W25RMS Obs., 8 in MPECs 2017-E68, 2017-E69, 2017-E70 & 2017-E80 -- 2017 EZ2, 2017 EY2, 2017 EK, 2017 EH1, 2017 EA3, 2017 DC36, 370702, 138155
K61Rokycany Obs. in the Czech Republic, 2 in MPECs 2017-E69 & 2017-E70 -- 2017 EZ2, 2017 EA3
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2017-E69, 2017-E70, 2017-E74 & 2017-E75 -- 2017 EZ2, 2017 EF3, 2017 EE3, 2017 EA3
H36Sandlot Obs. in Kansas, 3 in MPECs 2017-E68, 2017-E69 & 2017-E75 -- 2017 EZ2, 2017 EY2, 2017 EF3
A29Santa Maria a Monte Obs. in Italy, 2 in MPECs 2017-E69 & 2017-E70 -- 2017 EZ2, 2017 EA3
204Schiaparelli Obs. in Italy, 6 in MPECs 2017-E64, 2017-E68, 2017-E69, 2017-E70, 2017-E75 & 2017-E77 -- 2017 EZ2, 2017 EY2, 2017 ET2, 2017 EH3, 2017 EF3, 2017 EA3
587Sormano Obs. in Italy, 1 in MPEC 2017-E69 -- 2017 EZ2
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2017-E62, 2017-E71 & 2017-E80 -- 2017 ES2, 2017 ED, 2017 EB3, 2017 DS36
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2017-E61, 2017-E63, 2017-E64, 2017-E65, 2017-E71 & 2017-E73 -- 2017 EW2, 2017 EU2, 2017 ET2, 2017 ER2, 2017 ED3, 2017 EB3
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-E80 -- 2015 BY310
I52Steward Obs. Mt. Lemmon Station in Arizona, 11 in MPECs 2017-E67, 2017-E68, 2017-E69, 2017-E70, 2017-E72, 2017-E77, 2017-E78, 2017-E79 & 2017-E80 -- 2017 EZ2, 2017 EY2, 2017 EX2, 2017 EL, 2017 EK3, 2017 EJ3, 2017 EH3, 2017 EF3, 2017 EE3, 2017 EC3, 2017 EA3
926Tenagra II Obs. in Arizona, 8 in MPECs 2017-E68, 2017-E69, 2017-E70 & 2017-E80 -- 2017 EZ2, 2017 EY2, 2017 EK, 2017 EE3, 2017 EA3, 2017 DT37, 2017 DA36, 142561
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2017-E80 -- 2016 PO38, 2016 MK1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 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 ET2NEODyS1552211215.74e-09-8.94-8.940NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2017-03-05.343 to 2017-03-09.381."
JPL Sentry0435211211.3e-08-8.58-8.580JPL: "Analysis based on 16 observations spanning 4.0376 days (2017-Mar-05.34237 to 2017-Mar-09.37993)." Diameter approximately 0.024 km. from mean, weighted H=25.8.
2017 EJ1JPL Sentry1740R E M O V E DJPL: Risk listing removed at 1607 UTC.
2017 BL30NEODyS17402094-211561.02e-07-6.55-7.170NEODyS: "Based on 308 optical observations (of which 0 are rejected as outliers) from 2017-01-28.379 to 2017-03-08.205."
2016 NL39NEODyS15522057-21172923.24e-03-4.02-4.190NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2016-07-13.464 to 2016-08-10.439."

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 10 March '17

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

1910Generated Traffic Report
1740Noted that NEODyS has updated its 2017 BL30 risk assessment - see above
Noted that JPL Sentry has removed 2017 EJ1 as an impact risk - see above
1552Noted that NEODyS has updated its 2016 NL39 risk assessment - see above
Noted that NEODyS has posted 2017 ET2 as an impact risk - see above
Grabbed MPEC 2017-E80 - Daily Orbit Update - see above
0435Noted that JPL Sentry has posted 2017 ET2 as an impact risk - see above
Grabbed MPEC 2017-E70 - 2017 EA3 - see above
Grabbed MPEC 2017-E71 - 2017 EB3 - see above
Grabbed MPEC 2017-E72 - 2017 EC3 - see above
Grabbed MPEC 2017-E73 - 2017 ED3 - see above
Grabbed MPEC 2017-E74 - 2017 EE3 - see above
Grabbed MPEC 2017-E75 - 2017 EF3 - see above
Grabbed MPEC 2017-E76 - 2017 EG3 - see above
Grabbed MPEC 2017-E77 - 2017 EH3 - see above
Grabbed MPEC 2017-E78 - 2017 EJ3 - see above
Grabbed MPEC 2017-E79 - 2017 EK3 - see above
0233Grabbed MPEC 2017-E61 - 2017 ER2 - see above
Grabbed MPEC 2017-E62 - 2017 ES2 - see above
Grabbed MPEC 2017-E63 - 2017 EW2 - see above
Grabbed MPEC 2017-E64 - 2017 ET2 - see above
Grabbed MPEC 2017-E65 - 2017 EU2 - see above
Grabbed MPEC 2017-E66 - 2017 EV2 - see above
Grabbed MPEC 2017-E67 - 2017 EX2 - see above
Grabbed MPEC 2017-E68 - 2017 EY2 - see above
Grabbed MPEC 2017-E69 - 2017 EZ2 - see above