Event between (250112) 02KY14 and star UC4-498-034283 with event index number of 356277
Geocentric closest approach at 2020/01/20 11:36:51 UTC
J2000 position of star is 06:50:59.5 +09:26:12
Equinox of date position of star is 06:52:03.5 +09:24:45
Stellar brightness R=14.9,
use SENSEUP=128
Star is 143 degrees from the moon.
Moon is 20% illuminated.
TNO apparent brightness V=21.0
[RECON map]
TNO is 13.5 AU from the Sun
and 12.6 AU from the Earth.
The TNO is moving 21.9
km/sec on the sky relative to the star, or,
8.6 arcsec/hr.
The 1-sigma error in the time of the event is 79 seconds.
The 1-sigma cross-track error in the shadow position is
792 km.
The sky-plane scale is
9120.9 km/arcsec.
The TNO has an absolute magnitude Hv=9.7
Diameter=69.2 km assuming a 5% albedo -- 3.2 sec chord
Diameter=28.2 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 250112, (2020/01/20 11:37UT) Object RA Dec mag sep mel Betelgeuse 05:56:15.5 +07:24:33 0.4 13.95 155 Alhena 06:38:52.2 +16:22:50 1.9 7.68 148 PPM 151446 06:53:54.9 +08:21:16 6.0 1.15 142 PPM 151366 06:51:44.5 +09:14:03 8.1 0.20 143 250112 06:52:05.5 +09:24:42 14.9 143 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
5.0 sigma about the mid-time.
The median site spacing is 19.8 km
RECON observability=0.6 and success probability=2.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 11:34:13 | -39.8 | Dark | Down | 19.6 | 261.3 | Really Low | 11:27:06 - 11:41:19 | 3482 |
| Summerland | 11:34:12 | -40.1 | Dark | Down | 19.8 | 261.1 | Really Low | 11:27:06 - 11:41:19 | 3458 |
| Penticton | 11:34:12 | -40.0 | Dark | Down | 19.7 | 261.2 | Really Low | 11:27:05 - 11:41:18 | 3455 |
| Okanagan Falls | 11:34:11 | -40.1 | Dark | Down | 19.8 | 261.3 | Really Low | 11:27:05 - 11:41:18 | 3442 |
| Oliver | 11:34:10 | -40.2 | Dark | Down | 19.8 | 261.4 | Really Low | 11:27:04 - 11:41:17 | 3431 |
| Anarchist Mountain Observatory | 11:34:09 | -40.1 | Dark | Down | 19.7 | 261.6 | Really Low | 11:27:03 - 11:41:16 | 3422 |
| Oroville | 11:34:10 | -40.2 | Dark | Down | 19.8 | 261.5 | Really Low | 11:27:03 - 11:41:16 | 3416 |
| Tonasket | 11:34:08 | -40.2 | Dark | Down | 19.8 | 261.6 | Really Low | 11:27:02 - 11:41:15 | 3399 |
| Okanogan | 11:34:07 | -40.4 | Dark | Down | 19.9 | 261.6 | Really Low | 11:27:01 - 11:41:14 | 3374 |
| Brewster | 11:34:06 | -40.6 | Dark | Down | 20.1 | 261.6 | Low | 11:27:00 - 11:41:13 | 3352 |
| Manson/Chelan | 11:34:06 | -40.9 | Dark | Down | 20.4 | 261.3 | Low | 11:26:59 - 11:41:12 | 3332 |
| Entiat | 11:34:05 | -41.0 | Dark | Down | 20.5 | 261.4 | Low | 11:26:59 - 11:41:12 | 3316 |
| Wenatchee | 11:34:05 | -41.2 | Dark | Down | 20.6 | 261.4 | Low | 11:26:58 - 11:41:11 | 3296 |
| Ellensburg | 11:34:03 | -41.4 | Dark | Down | 20.8 | 261.4 | Low | 11:26:56 - 11:41:09 | 3263 |
| Yakima | 11:34:02 | -41.5 | Dark | Down | 20.9 | 261.5 | Low | 11:26:55 - 11:41:08 | 3234 |
| Pasco | 11:33:59 | -40.7 | Dark | Down | 19.9 | 262.7 | Really Low | 11:26:52 - 11:41:05 | 3230 |
| Toppenish/White Swan | 11:34:00 | -41.5 | Dark | Down | 20.8 | 261.7 | Low | 11:26:54 - 11:41:07 | 3220 |
| PNWRO | 11:33:57 | -40.6 | Dark | Down | 19.8 | 263.0 | Really Low | 11:26:51 - 11:41:04 | 3215 |
| George/Umatilla | 11:33:57 | -40.9 | Dark | Down | 20.1 | 262.7 | Low | 11:26:51 - 11:41:04 | 3202 |
| Goldendale | 11:33:59 | -41.9 | Dark | Down | 21.2 | 261.6 | Low | 11:26:52 - 11:41:05 | 3174 |
| The Dalles | 11:33:59 | -42.2 | Dark | Down | 21.5 | 261.4 | Low | 11:26:52 - 11:41:05 | 3152 |
| Maupin | 11:33:57 | -42.3 | Dark | Down | 21.5 | 261.6 | Low | 11:26:50 - 11:41:03 | 3122 |
| Madras/Culver | 11:33:55 | -42.4 | Dark | Down | 21.6 | 261.8 | Low | 11:26:48 - 11:41:01 | 3080 |
| Redmond | 11:33:54 | -42.6 | Dark | Down | 21.7 | 261.9 | Low | 11:26:47 - 11:41:00 | 3052 |
| Sisters | 11:33:54 | -42.8 | Dark | Down | 21.9 | 261.6 | Low | 11:26:48 - 11:41:01 | 3048 |
| Bend | 11:33:53 | -42.7 | Dark | Down | 21.8 | 261.9 | Low | 11:26:47 - 11:41:00 | 3034 |
| Oregon Observatory | 11:33:53 | -42.9 | Dark | Down | 21.9 | 261.9 | Low | 11:26:46 - 11:40:59 | 3019 |
| La Pine/Gilchrist | 11:33:52 | -42.9 | Dark | Down | 22.0 | 261.9 | Low | 11:26:45 - 11:40:58 | 3002 |
| North Lake | 11:33:50 | -42.6 | Dark | Down | 21.6 | 262.5 | Low | 11:26:43 - 11:40:56 | 2977 |
| Niwot | 11:33:25 | -31.3 | Dark | Up | 10.0 | 273.9 | Really Low | 11:26:19 - 11:40:32 | 2968 |
| SwRI | 11:33:25 | -31.4 | Dark | Up | 10.1 | 273.9 | Really Low | 11:26:19 - 11:40:32 | 2959 |
| Paisley | 11:33:47 | -42.5 | Dark | Down | 21.4 | 263.0 | Low | 11:26:41 - 11:40:54 | 2940 |
| Chiloquin | 11:33:49 | -43.5 | Dark | Down | 22.4 | 262.1 | Low | 11:26:42 - 11:40:55 | 2910 |
| Lakeview | 11:33:45 | -42.5 | Dark | Down | 21.4 | 263.3 | Low | 11:26:39 - 11:40:52 | 2903 |
| Klamath Falls | 11:33:47 | -43.5 | Dark | Down | 22.4 | 262.3 | Low | 11:26:41 - 11:40:54 | 2884 |
| Tulelake | 11:33:46 | -43.3 | Dark | Down | 22.2 | 262.6 | Low | 11:26:39 - 11:40:52 | 2868 |
| Cedarville | 11:33:43 | -42.5 | Dark | Down | 21.3 | 263.7 | Low | 11:26:36 - 11:40:49 | 2854 |
| Fall River/Burney | 11:33:43 | -43.5 | Dark | Down | 22.3 | 263.0 | Low | 11:26:36 - 11:40:49 | 2796 |
| Susanville | 11:33:40 | -43.0 | Dark | Down | 21.8 | 263.8 | Low | 11:26:33 - 11:40:46 | 2757 |
| Gimple | 11:33:39 | -43.2 | Dark | Down | 22.0 | 263.7 | Low | 11:26:32 - 11:40:45 | 2731 |
| Greenville | 11:33:39 | -43.3 | Dark | Down | 22.1 | 263.7 | Low | 11:26:32 - 11:40:45 | 2730 |
| Quincy | 11:33:38 | -43.3 | Dark | Down | 22.1 | 263.8 | Low | 11:26:32 - 11:40:45 | 2713 |
| Portola | 11:33:37 | -43.0 | Dark | Down | 21.7 | 264.1 | Low | 11:26:31 - 11:40:44 | 2711 |
| Reno | 11:33:35 | -42.6 | Dark | Up | 21.3 | 264.7 | Low | 11:26:29 - 11:40:42 | 2699 |
| Carson City | 11:33:34 | -42.6 | Dark | Up | 21.3 | 264.8 | Low | 11:26:28 - 11:40:41 | 2670 |
| Yerington | 11:33:33 | -42.1 | Dark | Up | 20.8 | 265.3 | Low | 11:26:26 - 11:40:39 | 2664 |
| Gardnerville | 11:33:33 | -42.6 | Dark | Up | 21.3 | 264.9 | Low | 11:26:27 - 11:40:40 | 2650 |
| Hawthorne | 11:33:30 | -41.8 | Dark | Up | 20.4 | 265.8 | Low | 11:26:24 - 11:40:37 | 2634 |
| Tonopah | 11:33:27 | -40.8 | Dark | Up | 19.4 | 266.9 | Really Low | 11:26:21 - 11:40:34 | 2618 |
| Lee Vining | 11:33:29 | -42.3 | Dark | Up | 20.9 | 265.7 | Low | 11:26:23 - 11:40:36 | 2579 |
| Bishop | 11:33:26 | -41.8 | Dark | Up | 20.4 | 266.4 | Low | 11:26:20 - 11:40:33 | 2541 |
| Beatty | 11:33:23 | -40.5 | Dark | Up | 19.1 | 267.5 | Really Low | 11:26:16 - 11:40:29 | 2528 |
| Indian Springs | 11:33:20 | -39.7 | Dark | Up | 18.2 | 268.3 | Really Low | 11:26:14 - 11:40:27 | 2518 |
| Henderson | 11:33:18 | -39.1 | Dark | Up | 17.7 | 268.9 | Really Low | 11:26:12 - 11:40:25 | 2484 |
| Lone Pine | 11:33:23 | -41.6 | Dark | Up | 20.1 | 266.9 | Low | 11:26:17 - 11:40:30 | 2481 |
| Patrick | 11:33:15 | -38.3 | Dark | Up | 16.8 | 269.7 | Really Low | 11:26:09 - 11:40:22 | 2449 |
| Searchlight/Boulder City | 11:33:16 | -39.1 | Dark | Up | 17.7 | 269.1 | Really Low | 11:26:10 - 11:40:23 | 2436 |
| DCO | 11:33:13 | -37.7 | Dark | Up | 16.2 | 270.2 | Really Low | 11:26:07 - 11:40:20 | 2434 |
| Kingman/Dolan Springs | 11:33:14 | -38.4 | Dark | Up | 17.0 | 269.7 | Really Low | 11:26:08 - 11:40:21 | 2426 |
| Laughlin/Bullhead City | 11:33:15 | -38.9 | Dark | Up | 17.4 | 269.4 | Really Low | 11:26:08 - 11:40:21 | 2416 |
| Mohave Valley | 11:33:14 | -38.9 | Dark | Up | 17.4 | 269.5 | Really Low | 11:26:07 - 11:40:20 | 2393 |
| Lake Havasu City | 11:33:13 | -38.7 | Dark | Up | 17.2 | 269.7 | Really Low | 11:26:06 - 11:40:19 | 2362 |
| Parker | 11:33:11 | -38.7 | Dark | Up | 17.2 | 269.9 | Really Low | 11:26:05 - 11:40:18 | 2332 |
| CPSLO | 11:33:23 | -43.8 | Dark | Up | 22.3 | 265.8 | Low | 11:26:16 - 11:40:29 | 2326 |
| Blythe | 11:33:10 | -38.9 | Dark | Up | 17.4 | 269.9 | Really Low | 11:26:04 - 11:40:17 | 2281 |
| Idyllwild | 11:33:13 | -40.7 | Dark | Up | 19.2 | 268.6 | Really Low | 11:26:06 - 11:40:19 | 2255 |
| Wildwood | 11:33:16 | -42.2 | Dark | Up | 20.7 | 267.5 | Low | 11:26:10 - 11:40:23 | 2255 |
| Calipatria | 11:33:10 | -39.7 | Dark | Up | 18.2 | 269.5 | Really Low | 11:26:03 - 11:40:16 | 2222 |
| Yuma | 11:33:07 | -39.0 | Dark | Up | 17.5 | 270.1 | Really Low | 11:26:01 - 11:40:14 | 2198 |
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 250112, (2020/01/20 11:37UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 13.95 155 Alhena 06:37:42.8 +16:23:57 1.9 7.68 148 PPM 151446 06:52:49.4 +08:22:49 6.0 1.15 142 PPM 151366 06:50:38.6 +09:15:32 8.1 0.20 143 250112 06:50:59.5 +09:26:12 14.9 143 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:11:39 UT
Marc W. Buie, Southwest Research Institute