Event between (29981) 99TD10 and star GA1060:02562666 with event index number of 244385
Geocentric closest approach at 2020/01/29 02:44:52 UTC
J2000 position of star is 07:00:36.7 +16:38:39
Equinox of date position of star is 07:01:40.5 +16:37:01
Stellar brightness G=15.5,
use SENSEUP=128
Star is 108 degrees from the moon.
Moon is 16% illuminated.
TNO apparent brightness V=23.7
[RECON map]
TNO is 31.5 AU from the Sun
and 30.6 AU from the Earth.
The TNO is moving 23.2
km/sec on the sky relative to the star, or,
3.8 arcsec/hr.
The 1-sigma error in the time of the event is 363 seconds.
The 1-sigma cross-track error in the shadow position is
1375 km.
The sky-plane scale is
22200.3 km/arcsec.
The TNO has an absolute magnitude Hv=8.7
Diameter=109.7 km assuming a 5% albedo -- 4.7 sec chord
Diameter=44.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
Star training set for 29981, (2020/01/29 02:45UT) Object RA Dec mag sep mel Pollux 07:46:32.6 +27:58:34 1.1 15.35 118 Alhena 06:38:52.3 +16:22:50 1.9 5.49 103 PPM 123373 07:01:27.0 +15:30:20 6.4 1.11 108 PPM 123383 07:01:48.8 +16:55:46 6.7 0.32 108 29981 07:01:46.1 +16:36:53 15.5 109 Positions are for equinox of date
This table contains the target star visibility for the RECON
network. The observing range has been set to a maximum of
2.5 sigma about the mid-time.
The median site spacing is 23.6 km
RECON observability=1.0 and success probability=0.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Penticton | 02:48:38 | -19.7 | Dark | Up | 35.2 | 106.7 | Up | 02:33:38 - 03:03:38 | 13937 |
| Oroville | 02:48:39 | -19.7 | Dark | Up | 35.5 | 106.4 | Up | 02:33:39 - 03:03:39 | 13879 |
| Tonasket | 02:48:39 | -19.7 | Dark | Up | 35.6 | 106.3 | Up | 02:33:39 - 03:03:39 | 13857 |
| Okanogan | 02:48:39 | -19.6 | Dark | Up | 35.6 | 105.9 | Up | 02:33:39 - 03:03:39 | 13827 |
| Brewster | 02:48:41 | -19.4 | Dark | Up | 35.5 | 105.6 | Up | 02:33:41 - 03:03:41 | 13803 |
| Manson/Chelan | 02:48:43 | -19.1 | Dark | Up | 35.3 | 105.1 | Up | 02:33:43 - 03:03:43 | 13787 |
| Entiat | 02:48:43 | -19.1 | Dark | Up | 35.3 | 104.9 | Up | 02:33:43 - 03:03:43 | 13767 |
| Wenatchee | 02:48:44 | -19.0 | Dark | Up | 35.3 | 104.6 | Up | 02:33:44 - 03:03:44 | 13744 |
| Ellensburg | 02:48:45 | -18.8 | Dark | Up | 35.3 | 104.2 | Up | 02:33:45 - 03:03:45 | 13707 |
| Yakima | 02:48:46 | -18.7 | Dark | Up | 35.4 | 103.9 | Up | 02:33:46 - 03:03:46 | 13668 |
| Toppenish/White Swan | 02:48:46 | -18.8 | Dark | Up | 35.6 | 103.9 | Up | 02:33:46 - 03:03:46 | 13645 |
| Pasco | 02:48:44 | -19.7 | Dark | Up | 36.4 | 104.9 | Up | 02:33:44 - 03:03:44 | 13620 |
| Goldendale | 02:48:48 | -18.5 | Dark | Up | 35.4 | 103.1 | Up | 02:33:48 - 03:03:48 | 13597 |
| PNWRO | 02:48:44 | -19.8 | Dark | Up | 36.7 | 104.9 | Up | 02:33:44 - 03:03:44 | 13594 |
| George/Umatilla | 02:48:45 | -19.5 | Dark | Up | 36.4 | 104.4 | Up | 02:33:45 - 03:03:45 | 13590 |
| The Dalles | 02:48:50 | -18.2 | Dark | Up | 35.2 | 102.7 | Up | 02:33:50 - 03:03:50 | 13579 |
| Maupin | 02:48:50 | -18.2 | Dark | Up | 35.4 | 102.5 | Up | 02:33:50 - 03:03:50 | 13537 |
| Madras/Culver | 02:48:51 | -18.1 | Dark | Up | 35.5 | 102.1 | Up | 02:33:51 - 03:03:51 | 13484 |
| Sisters | 02:48:53 | -17.7 | AT | Up | 35.2 | 101.5 | Up | 02:33:53 - 03:03:53 | 13457 |
| Redmond | 02:48:52 | -18.0 | Dark | Up | 35.5 | 101.8 | Up | 02:33:52 - 03:03:52 | 13450 |
| Bend | 02:48:53 | -17.9 | AT | Up | 35.5 | 101.5 | Up | 02:33:53 - 03:03:53 | 13430 |
| Oregon Observatory | 02:48:54 | -17.8 | AT | Up | 35.4 | 101.3 | Up | 02:33:54 - 03:03:54 | 13415 |
| La Pine/Gilchrist | 02:48:55 | -17.7 | AT | Up | 35.4 | 101.1 | Up | 02:33:55 - 03:03:55 | 13395 |
| North Lake | 02:48:54 | -18.1 | Dark | Up | 35.9 | 101.3 | Up | 02:33:54 - 03:03:54 | 13346 |
| Chiloquin | 02:48:58 | -17.3 | AT | Up | 35.4 | 100.1 | Up | 02:33:58 - 03:03:58 | 13290 |
| Paisley | 02:48:55 | -18.3 | Dark | Up | 36.3 | 101.2 | Up | 02:33:55 - 03:03:55 | 13287 |
| Klamath Falls | 02:48:58 | -17.3 | AT | Up | 35.5 | 99.9 | Up | 02:33:58 - 03:03:58 | 13255 |
| Lakeview | 02:48:55 | -18.3 | Dark | Up | 36.5 | 101.0 | Up | 02:33:55 - 03:03:55 | 13234 |
| Tulelake | 02:48:58 | -17.5 | AT | Up | 35.7 | 99.9 | Up | 02:33:58 - 03:03:58 | 13224 |
| Cedarville | 02:48:56 | -18.4 | Dark | Up | 36.8 | 100.6 | Up | 02:33:56 - 03:03:56 | 13166 |
| Fall River/Burney | 02:48:59 | -17.4 | AT | Up | 36.0 | 99.4 | Up | 02:33:59 - 03:03:59 | 13132 |
| Susanville | 02:48:58 | -17.9 | AT | Up | 36.6 | 99.4 | Up | 02:33:58 - 03:03:58 | 13059 |
| Greenville | 02:49:00 | -17.6 | AT | Up | 36.4 | 99.0 | Up | 02:34:00 - 03:04:00 | 13035 |
| Gimple | 02:49:00 | -17.7 | AT | Up | 36.5 | 99.1 | Up | 02:34:00 - 03:04:00 | 13034 |
| Quincy | 02:49:01 | -17.6 | AT | Up | 36.5 | 98.9 | Up | 02:34:01 - 03:04:01 | 13014 |
| Portola | 02:49:00 | -17.9 | AT | Up | 36.9 | 99.1 | Up | 02:34:00 - 03:04:00 | 12996 |
| Reno | 02:48:59 | -18.4 | Dark | Up | 37.4 | 99.4 | Up | 02:33:59 - 03:03:59 | 12961 |
| Carson City | 02:49:00 | -18.3 | Dark | Up | 37.5 | 99.2 | Up | 02:34:00 - 03:04:00 | 12924 |
| Gardnerville | 02:49:00 | -18.3 | Dark | Up | 37.5 | 99.0 | Up | 02:34:00 - 03:04:00 | 12899 |
| Yerington | 02:48:58 | -18.8 | Dark | Up | 38.0 | 99.5 | Up | 02:33:58 - 03:03:58 | 12897 |
| Niwot | 02:48:19 | -29.5 | Dark | Up | 47.9 | 112.0 | Up | 02:33:19 - 03:03:19 | 12896 |
| Hawthorne | 02:48:58 | -19.1 | Dark | Up | 38.5 | 99.5 | Up | 02:33:58 - 03:03:58 | 12843 |
| Lee Vining | 02:49:01 | -18.7 | Dark | Up | 38.2 | 98.7 | Up | 02:34:01 - 03:04:01 | 12791 |
| Tonopah | 02:48:55 | -20.1 | Dark | Up | 39.6 | 100.1 | Up | 02:33:55 - 03:03:55 | 12779 |
| Bishop | 02:48:59 | -19.1 | Dark | Up | 38.8 | 98.7 | Up | 02:33:59 - 03:03:59 | 12720 |
| Beatty | 02:48:56 | -20.3 | Dark | Up | 40.2 | 99.5 | Up | 02:33:56 - 03:03:56 | 12654 |
| Lone Pine | 02:49:00 | -19.3 | Dark | Up | 39.2 | 98.4 | Up | 02:34:00 - 03:04:00 | 12638 |
| Indian Springs | 02:48:54 | -21.2 | Dark | Up | 41.1 | 100.0 | Up | 02:33:54 - 03:03:54 | 12609 |
| Henderson | 02:48:53 | -21.6 | Dark | Up | 41.7 | 100.0 | Up | 02:33:53 - 03:03:53 | 12546 |
| CPSLO | 02:49:07 | -17.0 | AT | Up | 37.3 | 95.6 | Up | 02:34:07 - 03:04:07 | 12534 |
| Searchlight/Boulder City | 02:48:53 | -21.6 | Dark | Up | 41.9 | 99.6 | Up | 02:33:53 - 03:03:53 | 12485 |
| Patrick | 02:48:50 | -22.5 | Dark | Up | 42.7 | 100.3 | Up | 02:33:50 - 03:03:50 | 12469 |
| Laughlin/Bullhead City | 02:48:53 | -21.9 | Dark | Up | 42.2 | 99.6 | Up | 02:33:53 - 03:03:53 | 12450 |
| Kingman/Dolan Springs | 02:48:51 | -22.3 | Dark | Up | 42.6 | 99.9 | Up | 02:33:51 - 03:03:51 | 12447 |
| DCO | 02:48:50 | -23.0 | Dark | Up | 43.4 | 100.5 | Up | 02:33:50 - 03:03:50 | 12430 |
| Mohave Valley | 02:48:53 | -21.8 | Dark | Up | 42.3 | 99.3 | Up | 02:33:53 - 03:03:53 | 12421 |
| Wildwood | 02:49:05 | -18.5 | Dark | Up | 39.1 | 96.0 | Up | 02:34:05 - 03:04:05 | 12381 |
| Lake Havasu City | 02:48:54 | -22.0 | Dark | Up | 42.5 | 99.1 | Up | 02:33:54 - 03:03:54 | 12376 |
| Parker | 02:48:54 | -22.0 | Dark | Up | 42.6 | 98.8 | Up | 02:33:54 - 03:03:54 | 12339 |
| Idyllwild | 02:49:01 | -19.9 | Dark | Up | 40.7 | 96.9 | Up | 02:34:01 - 03:04:01 | 12321 |
| Blythe | 02:48:54 | -21.6 | Dark | Up | 42.4 | 98.2 | Up | 02:33:54 - 03:03:54 | 12286 |
| Calipatria | 02:48:59 | -20.8 | Dark | Up | 41.7 | 97.1 | Up | 02:33:59 - 03:03:59 | 12244 |
| Yuma | 02:48:56 | -21.5 | Dark | Up | 42.5 | 97.3 | Up | 02:33:56 - 03:03:56 | 12188 |
Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.
Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.
Star training set for 29981, (2020/01/29 02:45UT) Object RA Dec mag sep mel Pollux 07:45:18.1 +28:01:33 1.1 15.35 118 Alhena 06:37:42.8 +16:23:57 1.9 5.49 103 PPM 123373 07:00:18.1 +15:32:06 6.4 1.11 108 PPM 123383 07:00:39.2 +16:57:33 6.7 0.32 108 29981 07:00:36.7 +16:38:39 15.5 108 Positions are for J2000
Event circumstances last updated at 2018/06/12 19:51:57 UT
Marc W. Buie, Southwest Research Institute