Contents  on 1 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 1 March '17

Nine objects reported inside ten LD

Today nine asteroids are reported moving within ten lunar distances (LD) of our home world. Closest is NHATS target 2017 DJ16, which heads away from 4.08 to 4.89 LD.

Earth passage I D ~Size Distance Today  Notes
0.36 LD Feb. 232017 DG16 4 m  7.53 to 8.99 LD intruder, NHATS target, risk
0.58 LD Feb. 252017 DR34 5 m  9.65 to 12.19 LD exits ten LD, intruder
1.02 LD Feb. 272017 DV36 9 m  4.63 to 7.00 LD
3.58 LD Feb. 242017 CP1 40 m  5.85 to 6.68 LD radar/NHATS target
4.07 LD Feb. 282017 DJ16 23 m  4.08 to 4.89 LD
4.68 LD tomorrow2012 DR32 41 m  5.57 from 8.20 LD
7.12 LD Feb. 272017 DS34 24 m  9.18 to 12.88 LD exits ten LD - DOU
7.29 LD Feb. 272017 DA38 35 m  7.89 to 8.68 LD
7.43 LD Feb. 282017 DS37 12 m  7.52 to 7.81 LD

This report was updated at 1822 UTC with follow-up in today's DOU MPEC for two outbound and approaching objects (see tables above and below) and for departed NHATS targets 2017 DC36 and 2017 CF32, also a radar target. Your first local flying rocks traffic report was generated at 0617 UTC.

Approaching (sorted by 10-LD bubble entry date)
4.05 LD March 102017 DA36 34 m  < 10 LD March 5, NHATS target - DOU
9.65 LD March 82017 DV35 12 m  < 10 LD March 5, NHATS target
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
7.9   LD May 292017 CS 430 m  < 10 LD May 26, uncertainty +/- 17 mins., 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. 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 1 March '17

Radar observation of five 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 2359 UTC when the database was dated 1 March

NEOCP Activity  on 1 March '17

The MPC's NEO Confirmation Page has 50 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 27 were "one nighters." So far The Tracking News has counted a total of 64 listings on the NEOCP today.

New MPECs  on 1 March '17

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been fourteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-E14 - "15:09 UT" - 2017 DC109


MPEC 2017-E13 - "15:04 UT" - 2017 DB109


MPEC 2017-E12 - "15:00 UT" - 2017 DA109


MPEC 2017-E11 - "14:54 UT" - 2017 DZ108


MPEC 2017-E10 - "14:46 UT" - 2017 DY108


<< DOU on 1 Mar. '17 >>  MPEC 2017-E09 - "13:07 UT" - Daily Orbit Update


MPEC 2017-E08 - "12:31 UT" - 2014 HD3


MPEC 2017-E07 - "04:32 UT" - Comet P/2017 D4 (Panstarrs)


MPEC 2017-E06 - "04:17 UT" - Comet C/2017 D3 (ATLAS)


MPEC 2017-E05 - "03:35 UT" - Comet C/2017 D2 (Barros)


MPEC 2017-E04 - "03:15 UT" - Comet P/2017 D1 (Fuls)


MPEC 2017-E03 - "03:08 UT" - 2014 XO40


MPEC 2017-E02 - "01:32 UT" - 2017 DW108


MPEC 2017-E01 - "01:29 UT" - 2014 XO40

Observers  on 1 March '17

A total of 43 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 3 in radar -- 2017 BW, 2013 FK, 443103
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPEC 2017-E09 -- 2017 DW34, 2017 DV34, 2017 DT15, 2017 DR15, 2017 DM34, 2017 DL34, 2017 CN32, 2017 CF32, 2017 BN3, 2017 BK123, 2017 BG85, 2017 AP20, 2016 DP, 2005 EY223, 481904, 3103
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-E06 -- C/2017 D3
I47Auger Obs. in Argentina, 2 in MPECs 2017-E05 & 2017-E06 -- C/2017 D3, C/2017 D2
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-E02 -- 2017 DW108
R58Beverly-Begg Obs., 1 in MPEC 2017-E06 -- C/2017 D3
300Bisei Spaceguard Center in Japan, 2 in MPECs 2017-E02 & 2017-E11 -- 2017 DZ108, 2017 DW108
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-E13 -- 2017 DB109
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2017-E07, 2017-E10 & 2017-E14 -- 2017 DY108, 2017 DC109, P/2017 D4
958Dax Obs. in France, 1 in MPEC 2017-E02 -- 2017 DW108
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2017-E02 & 2017-E12 -- 2017 DW108, 2017 DA109
253Goldstone DSS-14 70m antenna in southern California, 5 in radar -- 2017 BW, 2017 BQ6, 2013 FK, 443103, 5604
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPECs 2017-E01 & 2017-E03 -- 2014 XO40
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 3 in MPECs 2017-E05, 2017-E06 & 2017-E07 -- P/2017 D4, C/2017 D3, C/2017 D2
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-E05 & 2017-E06 -- C/2017 D3, C/2017 D2
Q623Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-E05 & 2017-E06 -- C/2017 D3, C/2017 D2
Q625Cristovao Jacques in Brazil via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-E05 -- C/2017 D2
Q62?B. Lutkenhoner in Germany via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-E06 -- C/2017 D3
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 3 in MPECs 2017-E05, 2017-E06 & 2017-E07 -- P/2017 D4, C/2017 D3, C/2017 D2
585Kiev Comet Station in the Ukraine, 1 in MPEC 2017-E07 -- P/2017 D4
K92LCOGT Sutherland B in South Africa, 2 in MPEC 2017-E09 -- 2017 DV37, 2017 DD38
K93LCOGT Sutherland C in South Africa, 2 in MPECs 2017-E06 & 2017-E09 -- 2017 DE38, C/2017 D3
D35Lulin Minor Bodies Tracking (LIMIT) in Taiwan, 3 in MPECs 2017-E04, 2017-E06 & 2017-E07 -- P/2017 D4, C/2017 D3, P/2017 D1
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2017-E13 -- 2017 DB109
K95MASTER-II Sutherland in South Africa, 2 in MPECs 2017-E06 & 2017-E09 -- C/2017 D3, 7341
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2017-E07 -- P/2017 D4
474Mt. John Obs. in New Zealand, 12 in MPECs 2017-E05, 2017-E06, 2017-E07, 2017-E09, 2017-E10, 2017-E11 & 2017-E14 -- 2017 DZ108, 2017 DY108, 2017 DS36, 2017 DS34, 2017 DQ36, 2017 DC36, 2017 DC109, 2017 DA36, P/2017 D4, C/2017 D3, C/2017 D2, 2016 WW9
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2017-E04, 2017-E07 & 2017-E10 -- 2017 DY108, P/2017 D4, P/2017 D1
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-E02 -- 2017 DW108
X14Orbis Tertius Obs. in Argentina, 2 in MPEC 2017-E09 -- 90075, 138155
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2017-E09 -- 2003 EZ16
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2017-E02, 2017-E04, 2017-E06, 2017-E07, 2017-E12 & 2017-E14 -- 2017 DW108, 2017 DC109, 2017 DA109, P/2017 D4, C/2017 D3, P/2017 D1
D29Purple Mtn. Obs. Xuyi Station in China, 3 in MPEC 2017-E09 -- 2017 DC36, 386298, 152931
L04ROASTERR-1 in Romania, 1 in MPEC 2017-E11 -- 2017 DZ108
K33San Defendente Obs. in Italy, 1 in MPEC 2017-E02 -- 2017 DW108
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-E02 -- 2017 DW108
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-E02 -- 2017 DW108
A29Santa Maria a Monte Obs. in Italy, 1 in MPEC 2017-E02 -- 2017 DW108
204Schiaparelli Obs. in Italy, 1 in MPEC 2017-E02 -- 2017 DW108
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-E09 -- 2017 DC36
G40%program code "%" (14) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2017-E09 -- 2017 DC36, 163693
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-E09 -- 2017 CR32
Y00SONEAR in Brazil, 2 in MPECs 2017-E05 & 2017-E06 -- C/2017 D3, C/2017 D2
G45Space Surveillance Telescope Atom Site (SST Atom Site) in New Mexico, 4 in MPECs 2017-E02, 2017-E07, 2017-E11 & 2017-E13 -- 2017 DZ108, 2017 DW108, 2017 DB109, P/2017 D4
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2017-E07 & 2017-E09 -- P/2017 D4, 2017 CH1
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2017-E12 -- 2017 DA109
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2017-E02 -- 2017 DW108
I52Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2017-E02, 2017-E04 & 2017-E10 -- 2017 DY108, 2017 DW108, P/2017 D1
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-E06 -- C/2017 D3
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPECs 2017-E08 & 2017-E09 -- 2017 BF30, 2016 TB18, 2014 HD3, 364136
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2017-E09 -- 479325, 443103
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 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 DD38NEODyS15442113-211622.81e-08-7.52-7.620NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2017-02-25.495 to 2017-02-28.543."
2017 DQ36NEODyS18152021-2097114.14e-08-3.88-4.210NEODyS: "Based on 27 optical observations (of which 2 are rejected as outliers) from 2017-02-22.240 to 2017-02-28.385."
JPL Sentry16122021-2097153.5e-07-2.66-2.870JPL: "Analysis based on 27 observations spanning 6.1450 days (2017-Feb-22.23938 to 2017-Feb-28.38436)." Diameter approximately 0.458 km. from mean, weighted H=19.3.
2016 TB57NEODyS15442099-211663.65e-08-8.50-8.650NEODyS: "Based on 122 optical observations (of which 2 are rejected as outliers) from 2016-09-12.527 to 2017-02-27.552."

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 1 March '17

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

2359Noted Radar Astrometry database update - see above
1822Updated Traffic Report
1815Noted that NEODyS has updated its 2017 DQ36 risk assessment - see above
1612Noted that JPL Sentry has updated its 2017 DQ36 risk assessment - see above
1544Noted that NEODyS has updated its 2016 TB57 risk assessment - see above
Noted that NEODyS has posted 2017 DD38 as an impact risk - see above
Grabbed MPEC 2017-E08 - 2014 HD3 - see above
Grabbed MPEC 2017-E09 - Daily Orbit Update - see above
Grabbed MPEC 2017-E10 - 2017 DY108 - see above
Grabbed MPEC 2017-E11 - 2017 DZ108 - see above
Grabbed MPEC 2017-E12 - 2017 DA109 - see above
Grabbed MPEC 2017-E13 - 2017 DB109 - see above
Grabbed MPEC 2017-E14 - 2017 DC109 - see above
0527Grabbed MPEC 2017-E03 - 2014 XO40 - see above
Grabbed MPEC 2017-E04 - Comet P/2017 D1 (Fuls) - see above
Grabbed MPEC 2017-E05 - Comet C/2017 D2 (Barros) - see above
Grabbed MPEC 2017-E06 - Comet C/2017 D3 (ATLAS) - see above
Grabbed MPEC 2017-E07 - Comet P/2017 D4 (Panstarrs) - see above
0136Grabbed MPEC 2017-E01 - 2014 XO40 - see above
Grabbed MPEC 2017-E02 - 2017 DW108 - see above