Event between (69987) 98WA25 and star GA1120:01186668 with event index number of 1308260
Geocentric closest approach at 2023/12/20 01:48:05 UTC
J2000 position of star is 05:27:21.7 +22:21:41
Equinox of date position of star is 05:28:44.9 +22:22:45
Stellar brightness G=15.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 81 degrees from the moon.
Moon is 53% illuminated.
Apparent brightness V=23.3
[RECON map]
Object is 42.5 AU from the Sun
and 41.5 AU from the Earth.
Apparent velocity is 25.6
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 259 seconds.
The 1-sigma cross-track error in the shadow position is
1749 km.
The sky-plane scale is
30128.1 km/arcsec.
The object has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CLASSICAL
Star training set for 69987, (2023/12/20 01:55UT) Object RA Dec mag sep mel Aldebaran 04:37:17.9 +16:33:20 0.8 13.46 68 Alnath 05:27:48.5 +28:37:32 1.6 6.25 81 114 Tau 05:29:04.6 +21:57:19 4.7 0.43 81 PPM 094392 05:29:52.7 +22:45:37 8.1 0.45 81 PPM 094372 05:28:28.1 +22:24:39 9.9 0.08 81 69987 05:28:48.5 +22:22:48 15.8 81 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
3.5 sigma about the mid-time.
The median site spacing is 62.8 km
RECON observability=0.2 and success probability=5.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 01:50:33 | -16.7 | AT | Up | 19.5 | 78.2 | Really Low | 01:35:33 - 02:05:33 | -3256 |
| Victoria | 01:50:40 | -14.1 | AT | Up | 17.1 | 75.3 | Really Low | 01:35:40 - 02:05:40 | -3310 |
| Peachland | 01:50:37 | -16.8 | AT | Up | 19.7 | 78.3 | Really Low | 01:35:37 - 02:05:37 | -3332 |
| Kelowna | 01:50:36 | -17.0 | AT | Up | 19.9 | 78.5 | Really Low | 01:35:36 - 02:05:36 | -3333 |
| Summerland | 01:50:37 | -16.8 | AT | Up | 19.7 | 78.3 | Really Low | 01:35:37 - 02:05:37 | -3344 |
| Penticton | 01:50:38 | -16.9 | AT | Up | 19.8 | 78.4 | Really Low | 01:35:38 - 02:05:38 | -3351 |
| Oliver | 01:50:39 | -16.8 | AT | Up | 19.7 | 78.2 | Really Low | 01:35:39 - 02:05:39 | -3374 |
| Anarchist Mountain Observatory | 01:50:39 | -16.8 | AT | Up | 19.8 | 78.3 | Really Low | 01:35:39 - 02:05:39 | -3391 |
| Okanogan | 01:50:41 | -16.5 | AT | Up | 19.5 | 77.9 | Really Low | 01:35:41 - 02:05:41 | -3428 |
| Brewster | 01:50:42 | -16.3 | AT | Up | 19.3 | 77.7 | Really Low | 01:35:42 - 02:05:42 | -3440 |
| Manson/Chelan | 01:50:43 | -16.0 | AT | Up | 19.0 | 77.4 | Really Low | 01:35:43 - 02:05:43 | -3444 |
| Wenatchee | 01:50:44 | -15.8 | AT | Up | 18.8 | 77.1 | Really Low | 01:35:44 - 02:05:44 | -3471 |
| Ellensburg | 01:50:46 | -15.5 | AT | Up | 18.6 | 76.8 | Really Low | 01:35:46 - 02:05:46 | -3492 |
| Yakima | 01:50:47 | -15.4 | AT | Up | 18.5 | 76.7 | Really Low | 01:35:47 - 02:05:47 | -3520 |
| Toppenish/White Swan | 01:50:48 | -15.4 | AT | Up | 18.6 | 76.7 | Really Low | 01:35:48 - 02:05:48 | -3540 |
| Sleaford | 01:50:22 | -25.7 | Dark | Up | 28.5 | 89.6 | Low | 01:35:22 - 02:05:22 | -3546 |
| The Dalles | 01:50:51 | -14.6 | AT | Up | 17.9 | 76.0 | Really Low | 01:35:51 - 02:05:51 | -3570 |
| Maupin | 01:50:51 | -14.6 | AT | Up | 17.8 | 75.9 | Really Low | 01:35:51 - 02:05:51 | -3603 |
| PNWRO | 01:50:49 | -16.3 | AT | Up | 19.5 | 77.6 | Really Low | 01:35:49 - 02:05:49 | -3610 |
| Sisters | 01:50:55 | -14.0 | AT | Up | 17.3 | 75.3 | Really Low | 01:35:55 - 02:05:55 | -3650 |
| Bend | 01:50:55 | -14.1 | AT | Up | 17.4 | 75.4 | Really Low | 01:35:55 - 02:05:55 | -3674 |
| Oregon Observatory | 01:50:56 | -13.9 | AT | Up | 17.3 | 75.3 | Really Low | 01:35:56 - 02:05:56 | -3683 |
| Chiloquin | 01:51:00 | -13.2 | AT | Up | 16.6 | 74.7 | Really Low | 01:36:00 - 02:06:00 | -3765 |
| Klamath Falls | 01:51:01 | -13.2 | AT | Up | 16.6 | 74.6 | Really Low | 01:36:01 - 02:06:01 | -3793 |
| Fall River/Burney | 01:51:04 | -13.0 | AT | Up | 16.6 | 74.5 | Really Low | 01:36:04 - 02:06:04 | -3893 |
| Cedarville | 01:51:03 | -14.1 | AT | Up | 17.6 | 75.4 | Really Low | 01:36:03 - 02:06:03 | -3896 |
| Greenville | 01:51:07 | -13.1 | AT | Up | 16.7 | 74.5 | Really Low | 01:36:07 - 02:06:07 | -3977 |
| Gimple | 01:51:07 | -13.1 | AT | Up | 16.7 | 74.6 | Really Low | 01:36:07 - 02:06:07 | -3979 |
| Quincy | 01:51:08 | -13.0 | AT | Up | 16.6 | 74.5 | Really Low | 01:36:08 - 02:06:08 | -3992 |
| Portola | 01:51:08 | -13.3 | AT | Up | 17.0 | 74.7 | Really Low | 01:36:08 - 02:06:08 | -4017 |
| Reno | 01:51:09 | -13.7 | AT | Up | 17.4 | 75.0 | Really Low | 01:36:09 - 02:06:09 | -4059 |
| Carson City | 01:51:10 | -13.6 | AT | Up | 17.3 | 74.9 | Really Low | 01:36:10 - 02:06:10 | -4088 |
| Gardnerville | 01:51:11 | -13.5 | AT | Up | 17.3 | 74.9 | Really Low | 01:36:11 - 02:06:11 | -4109 |
| Yerington | 01:51:10 | -14.0 | AT | Up | 17.7 | 75.2 | Really Low | 01:36:10 - 02:06:10 | -4125 |
| Hawthorne | 01:51:12 | -14.2 | AT | Up | 18.0 | 75.4 | Really Low | 01:36:12 - 02:06:12 | -4179 |
| Lee Vining | 01:51:13 | -13.7 | AT | Up | 17.5 | 74.9 | Really Low | 01:36:13 - 02:06:13 | -4207 |
| Bishop | 01:51:15 | -14.0 | AT | Up | 17.9 | 75.1 | Really Low | 01:36:15 - 02:06:15 | -4280 |
| Beatty | 01:51:15 | -15.1 | AT | Up | 19.1 | 75.9 | Really Low | 01:36:15 - 02:06:15 | -4374 |
| Dunrhomin | 01:50:58 | -24.7 | Dark | Up | 28.5 | 83.8 | Low | 01:35:58 - 02:05:58 | -4479 |
| Nikitin | 01:50:58 | -24.6 | Dark | Up | 28.5 | 83.7 | Low | 01:35:58 - 02:05:58 | -4494 |
| CU-SBO | 01:50:59 | -24.6 | Dark | Up | 28.4 | 83.6 | Low | 01:35:59 - 02:05:59 | -4497 |
| Wildwood | 01:51:23 | -12.8 | AT | Up | 16.9 | 74.1 | Really Low | 01:36:23 - 02:06:23 | -4544 |
| Laughlin/Bullhead City | 01:51:19 | -16.3 | AT | Up | 20.4 | 76.4 | Low | 01:36:19 - 02:06:19 | -4595 |
| Patrick | 01:51:18 | -16.9 | AT | Up | 21.0 | 76.9 | Low | 01:36:18 - 02:06:18 | -4598 |
| Idyllwild | 01:51:24 | -14.2 | AT | Up | 18.3 | 74.9 | Really Low | 01:36:24 - 02:06:24 | -4641 |
| Lake Havasu City | 01:51:20 | -16.3 | AT | Up | 20.4 | 76.3 | Low | 01:36:20 - 02:06:20 | -4661 |
| Calipatria | 01:51:24 | -14.9 | AT | Up | 19.1 | 75.3 | Really Low | 01:36:24 - 02:06:24 | -4736 |
| Yuma | 01:51:25 | -15.5 | AT | Up | 19.7 | 75.5 | Really Low | 01:36:25 - 02:06:25 | -4806 |
| George/Scottsdale | 01:51:21 | -18.0 | Dark | Up | 22.2 | 77.2 | Low | 01:36:21 - 02:06:21 | -4815 |
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 69987, (2023/12/20 01:55UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 13.46 68 Alnath 05:26:17.5 +28:36:23 1.6 6.25 81 114 Tau 05:27:38.1 +21:56:13 4.7 0.43 81 PPM 094392 05:28:25.7 +22:44:33 8.1 0.45 81 PPM 094372 05:27:01.3 +22:23:32 9.9 0.08 81 69987 05:27:21.7 +22:21:41 15.8 81 Positions are for J2000
Event circumstances last updated at 2022/12/24 03:55:43 UT
Marc W. Buie, Southwest Research Institute