Contents on 24 January '19
- Traffic Report -- six objects
- IAU Minor Planet Center
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1015 risk-listed objects, 47 have had news in the last 31 days. Updated at 1650 UTC on 24 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 24 January '19
Six objects reported inside ten LD
Six asteroids are reported to be less than ten lunar distances (LD) from Earth today. None are closer than six LD.
|Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|5.7 LD Jan. 26*||2019 AA10||26 m||6.3 from 7.6 LD||Jan. 22 - 29||EPU +/- 6 mins.*|
|6.95 LD yesterday||2019 AS11||15 m||7.02 to 7.21 LD||Jan. 15 - 30||NHATS target|
|7.45 LD Jan. 19||2019 AB5||27 m||9.58 to 10.57 LD||Jan. 15 - 24||exits ten LD|
|7.6 LD tomorrow*||2019 AJ13||8 m||7.6 from 7.7 LD||Jan. 20 - 29||EPU +/- 5 mins.*, NHATS target|
|8.59 LD tomorrow||2019 AG11||19 m||8.63 from 8.96 LD||Jan. 22 - 28|
|9.1 LD tomorrow*||2019 AN12||28 m||9.2 from 10.4 LD||today - tomorrow||EPU +/- 18 mins.*, enters ten LD|
|* EPU = Earth passage uncertainty|
This report was generated at 1805 UTC with the addition of returning 2017 PV25, which isn't yet visible to ground-based telescopes. The Minor Planet Center is reporting major computer problems overnight and, at last check, no MPECs have been issued today.
|7.3 LD Feb. 12*||2017 PV25||41 m||27.3 from 28.8 LD||Feb. 7 - 17||NEW, EPU +/- 1.07 hours*, NHATS target|
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. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 24 January '19
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, 38 were "one nighters." So far The Tracking News has counted a total of 81 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 24 January '19
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been no MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
When no Daily Orbit Update (DOU) MPEC has been posted by this time of day, visit the MPC Status Page for possible explanation.
Observers on 24 January '19
Without MPECs with observations to report, we have no observers to list yet today. For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.
Impact Risk Monitoring on 24 January '19
Notes for Today's Latest Risk Assessments
|2019 AK12||NEODyS||1645||2101-2118||4||1.67e-07||-8.13||-8.23||-||NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2019-01-14.443 to 2019-01-21.247."|
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.