Event between (524435) 02CY248 and star GA1000:03365578 with event index number of 1592121
Geocentric closest approach at 2021/10/21 11:06:35 UTC
J2000 position of star is 09:38:17.9 +11:24:24
Equinox of date position of star is 09:39:28.3 +11:18:28
Stellar brightness G=15.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 105 degrees from the moon.
Moon is 99% illuminated.
TNO apparent brightness V=22.6
[RECON map]
TNO is 50.6 AU from the Sun
and 51.0 AU from the Earth.
The TNO is moving 16.3
km/sec on the sky relative to the star, or,
1.6 arcsec/hr.
The 1-sigma error in the time of the event is 355 seconds.
The 1-sigma cross-track error in the shadow position is
4194 km.
The sky-plane scale is
36963.5 km/arcsec.
The TNO has an absolute magnitude Hv=5.4
Diameter=494.3 km assuming a 5% albedo -- 30.4 sec chord
Diameter=201.8 km assuming a 30% albedo -- 12.4 sec chord
Dynamical classification is CLASSICAL
Star training set for 524435, (2021/10/21 11:05UT) Object RA Dec mag sep mel Regulus 10:09:31.9 +11:51:35 1.3 7.38 112 5Xi Leo 09:33:07.1 +11:12:08 5.0 1.56 104 PPM 126619 09:37:32.4 +11:20:02 8.5 0.47 105 PPM 126641 09:39:08.0 +11:13:48 8.9 0.11 105 524435 09:39:28.3 +11:18:27 15.0 106 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 29.9 km
RECON observability=1.0 and success probability=11.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Clarence Fulton | 11:01:08 | -33.4 | Dark | Up | 22.5 | 99.3 | Low | 10:46:08 - 11:16:08 | 4024 |
| Kelowna | 11:01:04 | -33.6 | Dark | Up | 22.4 | 99.0 | Low | 10:46:04 - 11:16:04 | 3985 |
| Peachland | 11:01:04 | -33.9 | Dark | Up | 22.2 | 98.8 | Low | 10:46:04 - 11:16:04 | 3974 |
| Summerland | 11:01:06 | -33.9 | Dark | Up | 22.3 | 98.8 | Low | 10:46:06 - 11:16:06 | 3958 |
| Penticton | 11:01:06 | -33.8 | Dark | Up | 22.4 | 98.8 | Low | 10:46:06 - 11:16:06 | 3951 |
| Oliver | 11:01:03 | -34.0 | Dark | Up | 22.4 | 98.7 | Low | 10:46:03 - 11:16:03 | 3915 |
| Anarchist Mountain Observatory | 11:01:03 | -33.9 | Dark | Up | 22.6 | 98.8 | Low | 10:46:03 - 11:16:03 | 3897 |
| Tonasket | 11:01:03 | -34.1 | Dark | Up | 22.6 | 98.6 | Low | 10:46:03 - 11:16:03 | 3865 |
| Victoria | 11:00:57 | -36.6 | Dark | Up | 20.0 | 95.4 | Really Low | 10:45:57 - 11:15:57 | 3856 |
| Okanogan | 11:01:02 | -34.4 | Dark | Up | 22.5 | 98.3 | Low | 10:46:02 - 11:16:02 | 3831 |
| Brewster | 11:01:01 | -34.6 | Dark | Up | 22.5 | 98.1 | Low | 10:46:01 - 11:16:01 | 3803 |
| Manson/Chelan | 11:00:59 | -34.9 | Dark | Up | 22.2 | 97.7 | Low | 10:45:59 - 11:15:59 | 3782 |
| Wenatchee | 11:00:59 | -35.2 | Dark | Up | 22.2 | 97.3 | Low | 10:45:59 - 11:15:59 | 3732 |
| Ellensburg | 11:00:58 | -35.5 | Dark | Up | 22.1 | 97.0 | Low | 10:45:58 - 11:15:58 | 3690 |
| Yakima | 11:00:56 | -35.7 | Dark | Up | 22.1 | 96.8 | Low | 10:45:56 - 11:15:56 | 3647 |
| Toppenish/White Swan | 11:00:56 | -35.7 | Dark | Up | 22.3 | 96.9 | Low | 10:45:56 - 11:15:56 | 3624 |
| Pasco | 11:00:57 | -34.9 | Dark | Up | 23.1 | 97.8 | Low | 10:45:57 - 11:15:57 | 3610 |
| PNWRO | 11:00:58 | -34.9 | Dark | Up | 23.3 | 97.9 | Low | 10:45:58 - 11:15:58 | 3583 |
| Goldendale | 11:00:54 | -36.2 | Dark | Up | 22.0 | 96.3 | Low | 10:45:54 - 11:15:54 | 3567 |
| The Dalles | 11:00:53 | -36.5 | Dark | Up | 21.8 | 95.9 | Low | 10:45:53 - 11:15:53 | 3544 |
| Maupin | 11:00:52 | -36.6 | Dark | Up | 21.9 | 95.9 | Low | 10:45:52 - 11:15:52 | 3500 |
| Sisters | 11:00:50 | -37.3 | Dark | Up | 21.6 | 95.1 | Low | 10:45:50 - 11:15:50 | 3408 |
| Redmond | 11:00:52 | -37.1 | Dark | Up | 21.9 | 95.4 | Low | 10:45:52 - 11:15:52 | 3404 |
| Bend | 11:00:49 | -37.3 | Dark | Up | 21.8 | 95.2 | Low | 10:45:49 - 11:15:49 | 3382 |
| Oregon Observatory | 11:00:50 | -37.4 | Dark | Up | 21.8 | 95.1 | Low | 10:45:50 - 11:15:50 | 3364 |
| La Pine/Gilchrist | 11:00:50 | -37.5 | Dark | Up | 21.7 | 94.9 | Low | 10:45:50 - 11:15:50 | 3342 |
| North Lake | 11:00:49 | -37.3 | Dark | Up | 22.2 | 95.2 | Low | 10:45:49 - 11:15:49 | 3294 |
| Paisley | 11:00:50 | -37.3 | Dark | Up | 22.5 | 95.2 | Low | 10:45:50 - 11:15:50 | 3235 |
| Chiloquin | 11:00:45 | -38.2 | Dark | Up | 21.5 | 94.2 | Low | 10:45:45 - 11:15:45 | 3224 |
| Klamath Falls | 11:00:46 | -38.3 | Dark | Up | 21.6 | 94.2 | Low | 10:45:46 - 11:15:46 | 3187 |
| Lakeview | 11:00:49 | -37.3 | Dark | Up | 22.7 | 95.2 | Low | 10:45:49 - 11:15:49 | 3180 |
| Cedarville | 11:00:48 | -37.5 | Dark | Up | 22.9 | 95.0 | Low | 10:45:48 - 11:15:48 | 3109 |
| Fall River/Burney | 11:00:44 | -38.5 | Dark | Up | 22.0 | 93.9 | Low | 10:45:44 - 11:15:44 | 3060 |
| Dunrhomin | 11:01:24 | -26.7 | Dark | Up | 34.4 | 105.4 | Up | 10:46:24 - 11:16:24 | 3022 |
| Susanville | 11:00:44 | -38.2 | Dark | Up | 22.6 | 94.2 | Low | 10:45:44 - 11:15:44 | 2990 |
| Greenville | 11:00:43 | -38.5 | Dark | Up | 22.4 | 93.9 | Low | 10:45:43 - 11:15:43 | 2961 |
| Gimple | 11:00:43 | -38.5 | Dark | Up | 22.5 | 93.9 | Low | 10:45:43 - 11:15:43 | 2960 |
| Quincy | 11:00:44 | -38.6 | Dark | Up | 22.4 | 93.8 | Low | 10:45:44 - 11:15:44 | 2939 |
| Portola | 11:00:45 | -38.3 | Dark | Up | 22.8 | 94.1 | Low | 10:45:45 - 11:15:45 | 2924 |
| Reno | 11:00:47 | -37.9 | Dark | Up | 23.3 | 94.4 | Low | 10:45:47 - 11:15:47 | 2894 |
| Carson City | 11:00:44 | -38.0 | Dark | Up | 23.4 | 94.2 | Low | 10:45:44 - 11:15:44 | 2855 |
| Yerington | 11:00:45 | -37.6 | Dark | Up | 23.9 | 94.6 | Low | 10:45:45 - 11:15:45 | 2833 |
| Gardnerville | 11:00:44 | -38.1 | Dark | Up | 23.4 | 94.2 | Low | 10:45:44 - 11:15:44 | 2828 |
| Hawthorne | 11:00:46 | -37.4 | Dark | Up | 24.3 | 94.7 | Low | 10:45:46 - 11:15:46 | 2782 |
| Tonopah | 11:00:49 | -36.4 | Dark | Up | 25.5 | 95.4 | Low | 10:45:49 - 11:15:49 | 2731 |
| Lee Vining | 11:00:43 | -37.9 | Dark | Up | 24.0 | 94.1 | Low | 10:45:43 - 11:15:43 | 2721 |
| Bishop | 11:00:45 | -37.5 | Dark | Up | 24.6 | 94.3 | Low | 10:45:45 - 11:15:45 | 2655 |
| Beatty | 11:00:48 | -36.4 | Dark | Up | 25.9 | 95.2 | Low | 10:45:48 - 11:15:48 | 2604 |
| Indian Springs | 11:00:50 | -35.6 | Dark | Up | 26.8 | 95.7 | Low | 10:45:50 - 11:15:50 | 2570 |
| Henderson | 11:00:52 | -35.2 | Dark | Up | 27.5 | 95.9 | Low | 10:45:52 - 11:15:52 | 2512 |
| Patrick | 11:00:54 | -34.5 | Dark | Up | 28.4 | 96.3 | Low | 10:45:54 - 11:15:54 | 2446 |
| CPSLO | 11:00:38 | -39.9 | Dark | Up | 22.9 | 92.0 | Low | 10:45:38 - 11:15:38 | 2433 |
| Kingman/Dolan Springs | 11:00:54 | -34.6 | Dark | Up | 28.3 | 96.0 | Low | 10:45:54 - 11:15:54 | 2421 |
| Laughlin/Bullhead City | 11:00:52 | -35.1 | Dark | Up | 27.9 | 95.7 | Low | 10:45:52 - 11:15:52 | 2417 |
| Mohave Valley | 11:00:52 | -35.1 | Dark | Up | 27.9 | 95.5 | Low | 10:45:52 - 11:15:52 | 2387 |
| Lake Havasu City | 11:00:52 | -35.0 | Dark | Up | 28.1 | 95.5 | Low | 10:45:52 - 11:15:52 | 2344 |
| Parker | 11:00:52 | -35.1 | Dark | Up | 28.2 | 95.3 | Low | 10:45:52 - 11:15:52 | 2305 |
| Wildwood | 11:00:43 | -38.6 | Dark | Up | 24.6 | 92.7 | Low | 10:45:43 - 11:15:43 | 2296 |
| George/Scottsdale | 11:00:59 | -33.1 | Dark | Up | 30.3 | 96.6 | Up | 10:45:59 - 11:15:59 | 2266 |
| Idyllwild | 11:00:46 | -37.1 | Dark | Up | 26.2 | 93.6 | Low | 10:45:46 - 11:15:46 | 2257 |
| Blythe | 11:00:51 | -35.4 | Dark | Up | 28.0 | 94.8 | Low | 10:45:51 - 11:15:51 | 2247 |
| Calipatria | 11:00:50 | -36.3 | Dark | Up | 27.3 | 94.0 | Low | 10:45:50 - 11:15:50 | 2191 |
| Yuma | 11:00:51 | -35.6 | Dark | Up | 28.0 | 94.3 | Low | 10:45:51 - 11:15:51 | 2144 |
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 524435, (2021/10/21 11:05UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 7.38 112 5Xi Leo 09:31:56.6 +11:17:58 5.0 1.56 104 PPM 126619 09:36:21.9 +11:25:57 8.5 0.47 105 PPM 126641 09:37:57.6 +11:19:45 8.9 0.11 105 524435 09:38:17.9 +11:24:24 15.0 105 Positions are for J2000
Event circumstances last updated at 2021/10/11 01:41:20 UT
Marc W. Buie, Southwest Research Institute