Event between (91205) 98US43 and star GA1040:01916599 with event index number of 1787695
Geocentric closest approach at 2027/12/16 13:43:21 UTC
J2000 position of star is 06:27:35.7 +14:36:24
Equinox of date position of star is 06:28:54.7 +14:35:27
Stellar brightness G=13.3,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 28 degrees from the moon.
Moon is 89% illuminated.
Apparent brightness V=24.1
[RECON map]
Object is 38.8 AU from the Sun
and 37.8 AU from the Earth.
Apparent velocity is 24.8
km/sec on the sky relative to the star, or,
3.3 arcsec/hr.
The 1-sigma error in the time of the event is 519 seconds.
The 1-sigma cross-track error in the shadow position is
2450 km.
The sky-plane scale is
27436.7 km/arcsec.
The object has an absolute magnitude Hv=8.2
Diameter=151.4 km assuming a 5% albedo -- 5.4 sec chord
Diameter=61.8 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is 3:2E
Star training set for 91205, (2027/12/16 13:34UT) Object RA Dec mag sep mel Betelgeuse 05:56:41.2 +07:24:36 0.4 10.73 38 Alhena 06:39:19.6 +16:22:23 1.9 3.03 25 PPM 122497 06:28:51.6 +14:52:13 6.2 0.29 28 PPM 122489 06:28:36.4 +14:45:37 8.6 0.22 28 PPM 122509 06:29:19.6 +14:30:12 10.7 0.09 28 91205 06:29:11.3 +14:35:15 13.3 28 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
1.7 sigma about the mid-time.
The median site spacing is 24.9 km
RECON observability=0.7 and success probability=9.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 13:40:41 | -12.2 | AT | Up | 13.1 | 277.0 | Really Low | 13:25:41 - 13:55:41 | 3402 |
| Kamloops | 13:40:44 | -20.3 | Dark | Up | 22.1 | 266.3 | Low | 13:25:44 - 13:55:44 | 3054 |
| Kelowna | 13:40:40 | -19.6 | Dark | Up | 21.5 | 267.3 | Low | 13:25:40 - 13:55:40 | 3007 |
| Peachland | 13:40:40 | -19.8 | Dark | Up | 21.7 | 267.1 | Low | 13:25:40 - 13:55:40 | 2993 |
| Summerland | 13:40:40 | -19.7 | Dark | Up | 21.7 | 267.2 | Low | 13:25:40 - 13:55:40 | 2984 |
| Penticton | 13:40:39 | -19.6 | Dark | Up | 21.6 | 267.3 | Low | 13:25:39 - 13:55:39 | 2980 |
| Oliver | 13:40:38 | -19.5 | Dark | Up | 21.6 | 267.5 | Low | 13:25:38 - 13:55:38 | 2953 |
| Anarchist Mountain Observatory | 13:40:37 | -19.3 | Dark | Up | 21.5 | 267.7 | Low | 13:25:37 - 13:55:37 | 2944 |
| Okanogan | 13:40:36 | -19.3 | Dark | Up | 21.7 | 267.8 | Low | 13:25:36 - 13:55:36 | 2889 |
| Brewster | 13:40:35 | -19.4 | Dark | Up | 21.8 | 267.7 | Low | 13:25:35 - 13:55:35 | 2864 |
| Manson/Chelan | 13:40:35 | -19.6 | Dark | Up | 22.1 | 267.5 | Low | 13:25:35 - 13:55:35 | 2841 |
| Victoria | 13:40:40 | -21.8 | Dark | Up | 24.2 | 264.8 | Low | 13:25:40 - 13:55:40 | 2835 |
| Wenatchee | 13:40:33 | -19.6 | Dark | Up | 22.2 | 267.6 | Low | 13:25:33 - 13:55:33 | 2800 |
| Ellensburg | 13:40:32 | -19.7 | Dark | Up | 22.4 | 267.6 | Low | 13:25:32 - 13:55:32 | 2763 |
| Yakima | 13:40:31 | -19.6 | Dark | Up | 22.4 | 267.7 | Low | 13:25:31 - 13:55:31 | 2730 |
| Toppenish/White Swan | 13:40:30 | -19.4 | Dark | Up | 22.3 | 268.0 | Low | 13:25:30 - 13:55:30 | 2715 |
| PNWRO | 13:40:28 | -18.3 | Dark | Up | 21.3 | 269.2 | Low | 13:25:28 - 13:55:28 | 2713 |
| The Dalles | 13:40:29 | -19.8 | Dark | Up | 22.9 | 267.7 | Low | 13:25:29 - 13:55:29 | 2637 |
| Maupin | 13:40:27 | -19.6 | Dark | Up | 22.9 | 267.9 | Low | 13:25:27 - 13:55:27 | 2604 |
| Sisters | 13:40:25 | -19.7 | Dark | Up | 23.2 | 268.0 | Low | 13:25:25 - 13:55:25 | 2522 |
| Dunrhomin | 13:40:03 | -7.0 | NT | Up | 10.9 | 280.0 | Really Low | 13:25:03 - 13:55:03 | 2513 |
| Bend | 13:40:24 | -19.5 | Dark | Up | 23.1 | 268.2 | Low | 13:25:24 - 13:55:24 | 2507 |
| Nikitin | 13:40:03 | -7.0 | NT | Up | 10.9 | 280.0 | Really Low | 13:25:03 - 13:55:03 | 2498 |
| CU-SBO | 13:40:02 | -7.0 | NT | Up | 11.0 | 279.9 | Really Low | 13:25:02 - 13:55:02 | 2490 |
| Oregon Observatory | 13:40:24 | -19.6 | Dark | Up | 23.2 | 268.2 | Low | 13:25:24 - 13:55:24 | 2490 |
| Chiloquin | 13:40:20 | -19.5 | Dark | Up | 23.5 | 268.5 | Low | 13:25:20 - 13:55:20 | 2369 |
| Klamath Falls | 13:40:20 | -19.4 | Dark | Up | 23.5 | 268.7 | Low | 13:25:20 - 13:55:20 | 2341 |
| Cedarville | 13:40:16 | -18.1 | Dark | Up | 22.3 | 270.1 | Low | 13:25:16 - 13:55:16 | 2312 |
| Fall River/Burney | 13:40:16 | -18.8 | Dark | Up | 23.2 | 269.4 | Low | 13:25:16 - 13:55:16 | 2246 |
| Gimple | 13:40:13 | -18.2 | Dark | Up | 22.8 | 270.2 | Low | 13:25:13 - 13:55:13 | 2176 |
| Greenville | 13:40:13 | -18.3 | Dark | Up | 22.9 | 270.1 | Low | 13:25:13 - 13:55:13 | 2175 |
| Quincy | 13:40:12 | -18.2 | Dark | Up | 22.9 | 270.2 | Low | 13:25:12 - 13:55:12 | 2157 |
| Portola | 13:40:11 | -17.8 | AT | Up | 22.5 | 270.6 | Low | 13:25:11 - 13:55:11 | 2155 |
| Reno | 13:40:10 | -17.3 | AT | Up | 22.0 | 271.1 | Low | 13:25:10 - 13:55:10 | 2145 |
| Carson City | 13:40:09 | -17.2 | AT | Up | 22.0 | 271.2 | Low | 13:25:09 - 13:55:09 | 2113 |
| Yerington | 13:40:08 | -16.6 | AT | Up | 21.5 | 271.7 | Low | 13:25:08 - 13:55:08 | 2109 |
| Gardnerville | 13:40:08 | -17.1 | AT | Up | 22.0 | 271.4 | Low | 13:25:08 - 13:55:08 | 2092 |
| Hawthorne | 13:40:06 | -16.1 | AT | Up | 21.1 | 272.2 | Low | 13:25:06 - 13:55:06 | 2078 |
| Lee Vining | 13:40:05 | -16.3 | AT | Up | 21.5 | 272.1 | Low | 13:25:05 - 13:55:05 | 2017 |
| Bishop | 13:40:03 | -15.6 | AT | Up | 20.9 | 272.8 | Low | 13:25:03 - 13:55:03 | 1978 |
| Beatty | 13:40:00 | -14.2 | AT | Up | 19.5 | 273.9 | Really Low | 13:25:00 - 13:55:00 | 1971 |
| Patrick | 13:39:54 | -11.5 | NT | Up | 17.1 | 276.0 | Really Low | 13:24:54 - 13:54:54 | 1898 |
| Laughlin/Bullhead City | 13:39:54 | -12.0 | AT | Up | 17.7 | 275.7 | Really Low | 13:24:54 - 13:54:54 | 1860 |
| Lake Havasu City | 13:39:52 | -11.6 | NT | Up | 17.4 | 276.1 | Really Low | 13:24:52 - 13:54:52 | 1803 |
| George/Scottsdale | 13:39:49 | -9.4 | NT | Up | 15.3 | 277.6 | Really Low | 13:24:49 - 13:54:49 | 1787 |
| Idyllwild | 13:39:52 | -13.2 | AT | Up | 19.3 | 275.0 | Really Low | 13:24:52 - 13:54:52 | 1680 |
| Wildwood | 13:39:55 | -14.8 | AT | Up | 20.9 | 273.9 | Low | 13:24:55 - 13:54:55 | 1671 |
| Calipatria | 13:39:50 | -12.1 | AT | Up | 18.2 | 275.9 | Really Low | 13:24:50 - 13:54:50 | 1648 |
| Yuma | 13:39:48 | -11.2 | NT | Up | 17.5 | 276.4 | Really Low | 13:24:48 - 13:54:48 | 1628 |
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 91205, (2027/12/16 13:34UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 10.73 38 Alhena 06:37:42.8 +16:23:56 1.9 3.03 25 PPM 122497 06:27:15.8 +14:53:21 6.2 0.29 28 PPM 122489 06:27:00.6 +14:46:45 8.6 0.22 28 PPM 122509 06:27:44.0 +14:31:22 10.7 0.09 28 91205 06:27:35.7 +14:36:24 13.3 28 Positions are for J2000
Event circumstances last updated at 2023/02/05 03:38:18 UT
Marc W. Buie, Southwest Research Institute