Contents on 2 January '18
- Traffic Report -- four objects
- IAU Minor Planet Center
- Observers -- 31 observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 904 risk-listed objects, 53 have had news in the last 31 days. Updated at 2231 UTC on 2 Jan.
- Ephemerides for risk-listed objects & close passers
- News archive (old) & news image catalog (discontinued)
- Object Links - mainly for radar targets & close passers (mostly discontinued)
- Observing Campaigns (old)
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 2 January '18
Four objects reported inside ten LD
Four asteroidal objects are reported within ten lunar distances (LD) of our home world today. Nearest is 2017 YD7, which is inbound from 5.32 to 4.73 LD.
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|0.58 LD Dec. 28||2017 YZ4||8 m||9.22 to 11.34 LD||Dec. 23 - today||intruder, NHATS target, exits ten LD|
|1.93 LD Dec. 24||2017 YS1||6 m||6.38 to 7.07 LD||Dec. 11 - Jan. 7||NHATS target|
|4.73 LD tomorrow||2017 YD7||12 m||4.73 from 5.32 LD||Dec. 30 - Jan. 6||NHATS target - DOU|
|7.74 LD Dec. 30||2017 YU1||20 m||9.00 to 9.98 LD||Dec. 26 - tomorrow||NHATS target|
|Approaching (sorted by 10-LD bubble entry date)|
|3.7 LD Feb. 24*||2017 DR109||10 m||107.3 from 110.1 LD||Feb. 18 - March 1||EPU +/- 30 mins.*, NHATS target|
|3.76 LD March 7||2017 VR12||272 m||85.71 from 87.18 LD||Feb. 28 - March 13||radar/NHATS target|
|* EPU = Earth passage uncertainty|
This report was updated at 2222 UTC with the discovery of already departed 2017 YF8 (MPEC), which flew by Earth at 5.83 LD on December 22nd. Your first Busy Neighborhood traffic report was generated at 1810 UTC with first follow-up in today's DOU MPEC for 2017 YD7 and continuing follow-up for departed 2006 XY.
Reading: The Wall Street Journal has brought attention to a recent outside report funded by NASA's Emerging Space Office (ESO) that argues, "Unless NASA finds a way to break a longstanding 'cycle of increasing costs ... human exploration, commercialization and colonization of space will likely remain unaffordable.'" The report's suggested way forward is to support and depend on a growing commercial space sector for lower-cost spacecraft development and operation, using services such as refueling in space from supplies mined from small near-Earth objects, specifically "optical mining" (see video and NIAC-submitted concept). The full report is online (133Mb PDF) and the executive summary has been published here. This report is also connected with the proposed Sutter Survey cubesat telescopes for NEO hunting, a proposal that has received some initial funding from the NASA Innovative Advanced Concepts (NIAC) office.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's 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 temporal 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 2 January '18
The MPC's NEO Confirmation Page has 36 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 36 objects listed. Of these, ten were "one nighters." So far The Tracking News has counted a total of 58 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 2 January '18
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2018-A05 time-stamped "13:04 UT" - Daily Orbit Update - see below
- MPEC 2018-A06 time-stamped "19:32 UT" - 2017 YA8 - see below
- MPEC 2018-A07 time-stamped "20:04 UT" - 2017 YB8 - see below
- MPEC 2018-A08 time-stamped "20:07 UT" - 2017 YC8 - see below
- MPEC 2018-A09 time-stamped "20:10 UT" - 2017 YD8 - see below
- MPEC 2018-A10 time-stamped "20:14 UT" - 2017 YE8 - see below
- MPEC 2018-A11 time-stamped "20:18 UT" - 2017 YF8
MPEC 2018-A11 - "20:18 UT" - 2017 YF8
- K17Y08F 2017 YF8 (Earth MOID=1.9 LD, H=25.8 ~23m) was picked up at 1435 UT on 29 Dec. by Pan-STARRS 1 (PS1), observing it at Dec. 29.61-64p4. This detection was confirmed by Tenagra II Obs. (Dec. 30.45-46p3 & 31.53-54p3), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 31.33-34p3), and Spacewatch via Kitt Peak Natl. Obs. (KPNO) (Dec. 31.42-44p3 & Jan. 1.51-53p3).
MPEC 2018-A10 - "20:14 UT" - 2017 YE8
- K17Y08E 2017 YE8 (risk listed, Earth MOID=1.6 LD, H=25.6 ~26m) was picked up at 0650 UT on 29 Dec. by the Mt. Lemmon Survey (MLS), observing it at Dec. 29.29-30p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 29.38-39p3 & 30.29p4) and Tenagra II Obs. (Dec. 30.35-36p3, 31.31-32p3 & 31.43p3).
MPEC 2018-A09 - "20:10 UT" - 2017 YD8
- K17Y08D 2017 YD8 (borderline-small, H=21.9 ~141m) was picked up at 0411 UT on 29 Dec. by the Catalina Sky Survey (CSS), observing it at Dec. 29.17-19p4 and 30.16-18p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 29.25p4 & 30.24p4), Sandlot Obs. (Dec. 29.26-27p4), M. Suzuki via iTelescope Obs. Mayhill (Dec. 29.40p2), Rokycany Obs. (Dec. 29.72-73p4 & Jan. 1.71p4), Oberfrauendorf Obs. (Dec. 29.75-77p5), Pascoli Obs. (Dec. 29.84-85p3), Farra d'Isonzo Obs. (Dec. 29.91-92p3), Squirrel Valley Obs. (Dec. 30.10-13p4), Harlingten Research Obs. (Dec. 30.18-19p3), Tenagra II Obs. (Dec. 30.22p3 & 31.18p3), iTelescope Obs. Mayhill (Dec. 30.25-27p4 & 31.25-28p3), ATLAS Mauna Loa (Dec. 30.43-46p4), Paus Obs. (Dec. 30.79-80p2), Bernezzo Obs. (Dec. 30.86-87p3), ROASTERR-1 (Dec. 30.97-98p5), Steven M. Tilley via iTelescope Obs. Nerpio (Dec. 31.08-09p3), Wiggins Obs. (Dec. 31.37-38p5), Muensterschwarzach Obs. (Dec. 31.83-85p5), Great Shefford Obs. (Jan. 1.86-89p4), North Obs. (Jan. 1.91-92p3), and Northolt Branch Obs. (Jan. 2.02-04p4).
MPEC 2018-A08 - "20:07 UT" - 2017 YC8
- K17Y08C 2017 YC8 (H=19.2 ~490m) was picked up at 1106 UT on 28 Dec. by MLS, observing it at Dec. 28.46-48p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 28.54p4, 29.44-45p4 & 30.42-43p4), Sandlot Obs. (Dec. 29.34-37p3), the Spacewatch 0.9m telescope (Dec. 30.43-45p3), Tenagra II Obs. (Dec. 31.41-42p3, 31.52-53p3 & Jan. 1.52-53p3), and PS1 (Dec. 31.55-59p4).
MPEC 2018-A07 - "20:04 UT" - 2017 YB8
- K17Y08B 2017 YB8 (Q=4.818 AU, H=21.1 ~204m) was picked up at 0839 UT on 24 Dec. by PS1, observing it at Dec. 24.36-39p4. This detection was confirmed by Holmes/CTIO (Dec. 25.15-16p3, 28.08-09p3, 29.19-20p3, 31.12-13p3 & Jan. 1.08-09p3).
MPEC 2018-A06 - "19:32 UT" - 2017 YA8
- K17Y08A 2017 YA8 (small asteroid, H=22.2 ~123m) was picked up at 0902 UT on 24 Dec. by PS1, observing it at Dec. 24.38-40p3. This detection was confirmed by Marco Micheli on Mauna Kea (Dec. 26.32p2) and Holmes/CTIO (Dec. 31.10-11p3 & Jan. 1.05-06p3).
- Observations of recently (no longer) risk-listed objects
- K17Y05P 2017 YP5 (small asteroid, Q=4.030 AU, arc=7 days, H=22.9 ~89m) from Great Shefford Obs. (Jan. 1.97-99p3)
- Observations of close-passing objects
- K17Y07D 2017 YD7 (arc=5 days, H=27.3 ~12m, NHATS target) from Great Shefford Obs. (Jan. 1.91-96p4)
- K06X00Y 2006 XY (arc=2 opp, H=24.1 ~51m, NHATS target) from PS1 (Jan. 1.51-53p3)
- Observation campaigns (NHATS targets, radar support)
- K17Y04X 2017 YX4 (arc=9 days, H=23.7 ~62m, NHATS) from Tenagra II Obs. (Jan. 2.09p3)
- K07A00G 2007 AG (Q=0.990 AU, arc=7 opp, H=20.1 ~323m, radar) from ATLAS Haleakala (Jan. 1.20-22p4) and Wishing Star Obs. (Jan. 2.02p3)
- 03200 3200 Phaethon (1983 TB) (radar) from Castelmartini Obs. (Dec. 19.71-73p7)
-- NHATS target table & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
- Observations of other objects
- K17Y02A 2017 YA2 (Q=4.003 AU, arc=12 days, H=21.5 ~170m) from Holmes/CTIO (Jan. 1.30-31p3)
- J99A04F 1999 AF4 (Q=4.570 AU, arc=2 opp, H=18.5 ~676m) from Oberfrauendorf Obs. (Jan. 1.77-78p4)
- o7366 507366 2011 XO3 from ATLAS Haleakala (Jan. 1.60-63p4)
- o5667 505667 2014 UV33 from ATLAS Haleakala (Jan. 1.60-63p4)
- n5848 495848 2002 QD7 from PS1 (Jan. 1.51-54p4)
- g2699 422699 2000 PD3 from PS1 (Jan. 1.64-66p4)
- e3039 403039 2008 AE from PS1 (Jan. 2.28-30p3)
- T4739 294739 2008 CM from Castelmartini Obs. (Dec. 21.14p3)
- J0208 190208 2006 AQ from ATLAS Haleakala (Jan. 1.57-61p3)
- G3732 163732 2003 KP2 from PS1 (Jan. 1.59-62p3)
- G2011 162011 Konnohmaru (1994 AB1) from ATLAS Haleakala (Jan. 1.58-61p4)
- F2931 152931 2000 EA107 from Castelmartini Obs. (Dec. 21.17-18p3)
- E3992 143992 2004 AF from Purple Mtn. Obs. Xuyi Station (Dec. 31.75-78p3) and ATLAS Haleakala (Jan. 1.55-59p4)
- E1670 141670 2002 JS100 from PS1 (Jan. 1.34-38p4)
- D7805 137805 1999 YK5 from ATLAS Haleakala (Jan. 1.21-23p4) and Wishing Star Obs. (Jan. 1.99p3)
- D7084 137084 1998 XS16 from PS1 (Jan. 1.59-62p4)
- D7052 137052 Tjelvar (1998 VO33) from ATLAS Haleakala (Jan. 1.60-63p4)
- D6839 136839 1997 WT22 from Castelmartini Obs. (Dec. 21.13p3)
- B2221 112221 2002 KH4 from PS1 (Jan. 1.33-37p4)
- B1253 111253 2001 XU10 from PS1 (Jan. 1.40-44p4)
- 96590 96590 1998 XB from ATLAS Haleakala (Jan. 1.62-65p4)
- 85628 85628 1998 KV2 from Castelmartini Obs. (Dec. 21.15p3)
- 53319 53319 1999 JM8 from PS1 (Jan. 1.33-35p2)
- 53110 53110 1999 AR7 from ATLAS Haleakala (Jan. 1.39-42p4)
- 17182 17182 1999 VU from ATLAS Haleakala (Jan. 1.21-23p4)
- 08567 8567 1996 HW1 from ATLAS Haleakala (Jan. 1.44-47p4)
- 08176 8176 1991 WA from PS1 (Jan. 1.40-44p4)
- 08037 8037 1993 HO1 from ATLAS Haleakala (Jan. 1.33-36p4)
- 01980 1980 Tezcatlipoca (1950 LA) from ATLAS Haleakala (Jan. 1.21-24p4)
- 01627 1627 Ivar (1929 SH) from Castelmartini Obs. (Dec. 21.17p3)
Observers on 2 January '18
A total of 31 observers appear in today's MPECs.
|Code||Observer / observatory|
|T05||ATLAS Haleakala in Hawaii, 14 in MPEC 2018-A05 -- 2007 AG, 96590, 53110, 507366, 505667, 190208, 17182, 162011, 143992, 137805, 137052, 8567, 8037, 1980|
|T08||ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-A09 -- 2017 YD8|
|C77||Bernezzo Obs. in Italy, 1 in MPEC 2018-A09 -- 2017 YD8|
|160||Castelmartini Obs. in Italy, 6 in MPEC 2018-A05 -- 85628, 294739, 152931, 136839, 3200, 1627|
|703||Catalina Sky Survey in Arizona, 1 in MPEC 2018-A09 -- 2017 YD8|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2018-A05, 2018-A06, 2018-A07 & 2018-A11 -- 2017 YF8, 2017 YB8, 2017 YA8, 2017 YA2|
|595||Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-A09 -- 2017 YD8|
|J95||Great Shefford Obs. in England, 3 in MPECs 2018-A05 & 2018-A09 -- 2017 YP5, 2017 YD8, 2017 YD7|
|G48||Harlingten Research Obs. in New Mexico, 1 in MPEC 2018-A09 -- 2017 YD8|
|H06||iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-A09 -- 2017 YD8|
|H06#||M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-A09 -- 2017 YD8|
|I89'||Steven M. Tilley in Louisiana via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2018-A09 -- 2017 YD8|
|695^||Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2018-A11 -- 2017 YF8|
|568_||Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2018-A06 -- 2017 YA8|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2018-A08 & 2018-A10 -- 2017 YE8, 2017 YC8|
|K74||Muensterschwarzach Obs. in Germany, 1 in MPEC 2018-A09 -- 2017 YD8|
|J69||North Obs. in England, 1 in MPEC 2018-A09 -- 2017 YD8|
|Z80||Northolt Branch Obs. in England, 1 in MPEC 2018-A09 -- 2017 YD8|
|G34||Oberfrauendorf Obs. in Germany, 2 in MPECs 2018-A05 & 2018-A09 -- 2017 YD8, 1999 AF4|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2018-A05, 2018-A06, 2018-A07, 2018-A08 & 2018-A11 -- 2017 YF8, 2017 YC8, 2017 YB8, 2017 YA8, 2006 XY, 53319, 495848, 422699, 403039, 163732, 141670, 137084, 112221, 111253, 8176|
|K63||Pascoli Obs. in Italy, 1 in MPEC 2018-A09 -- 2017 YD8|
|B49||Paus Obs. in Spain, 1 in MPEC 2018-A09 -- 2017 YD8|
|D29||Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2018-A05 -- 143992|
|L04||ROASTERR-1 in Romania, 1 in MPEC 2018-A09 -- 2017 YD8|
|K61||Rokycany Obs. in the Czech Republic, 1 in MPEC 2018-A09 -- 2017 YD8|
|H36||Sandlot Obs. in Kansas, 2 in MPECs 2018-A08 & 2018-A09 -- 2017 YD8, 2017 YC8|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-A08 -- 2017 YC8|
|W34||Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-A09 -- 2017 YD8|
|I52||Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2018-A08, 2018-A09 & 2018-A10 -- 2017 YE8, 2017 YD8, 2017 YC8|
|926||Tenagra II Obs. in Arizona, 5 in MPECs 2018-A05, 2018-A08, 2018-A09, 2018-A10 & 2018-A11 -- 2017 YX4, 2017 YF8, 2017 YE8, 2017 YD8, 2017 YC8|
|718||Wiggins Obs. in Utah, 1 in MPEC 2018-A09 -- 2017 YD8|
|I15||Wishing Star Obs. in Rhode Island, 2 in MPEC 2018-A05 -- 2007 AG, 137805|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 2 January '18
Notes for Today's Latest Risk Assessments
|2017 YE8||JPL Sentry||2230||2113-2117||4||1.08338e-06||-6.47||-6.79||0||JPL: Computed at 14:04 today Pacific time based on 20 observations spanning 2.1488 days (2017-Dec-29.28539 to 2017-Dec-31.43417). Diameter approximately 0.026 km. from weighted mean H=25.58.|
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 2 January '18
Times are UTC for when items were noted or added by The Tracking News.
|2230||Noted that JPL Sentry has posted 2017 YE8 as an impact risk - see above|
|2222||Updated Traffic Report|
|2100||Grabbed MPEC 2018-A07 - 2017 YB8 - see above|
Grabbed MPEC 2018-A08 - 2017 YC8 - see above
Grabbed MPEC 2018-A09 - 2017 YD8 - see above
Grabbed MPEC 2018-A10 - 2017 YE8 - see above
Grabbed MPEC 2018-A11 - 2017 YF8 - see above
|1934||Grabbed MPEC 2018-A06 - 2017 YA8 - see above|
|1650||Grabbed MPEC 2018-A05 - Daily Orbit Update - see above|