Event between (530955) 11YN79 and star GA1220:03435222 with event index number of 1600042
Geocentric closest approach at 2021/02/08 11:16:50 UTC
J2000 position of star is 09:43:54.3 +32:40:04
Equinox of date position of star is 09:45:08.9 +32:34:15
Stellar brightness G=15.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 139 degrees from the moon.
Moon is 13% illuminated.
TNO apparent brightness V=22.2
[RECON map]
TNO is 39.4 AU from the Sun
and 38.5 AU from the Earth.
The TNO is moving 24.8
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 126 seconds.
The 1-sigma cross-track error in the shadow position is
2154 km.
The sky-plane scale is
27890.2 km/arcsec.
The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 14.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is SCATNEAR
Star training set for 530955, (2021/02/08 11:18UT) Object RA Dec mag sep mel Regulus 10:09:29.6 +11:51:48 1.3 21.45 128 13 LMi 09:43:58.7 +34:59:45 6.1 2.44 139 PPM 074710 09:43:49.8 +32:53:52 7.9 0.43 139 PPM 074723 09:44:54.3 +32:22:56 11.0 0.20 139 530955 09:45:09.2 +32:34:13 15.4 138 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 14.9 km
RECON observability=1.0 and success probability=12.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Dunrhomin | 11:14:55 | -32.3 | Dark | Down | 44.8 | 279.0 | Up | 11:03:57 - 11:25:52 | -1640 |
| Clarence Fulton | 11:15:50 | -38.7 | Dark | Down | 54.3 | 256.9 | Up | 11:04:52 - 11:26:47 | -1722 |
| Kelowna | 11:15:49 | -39.0 | Dark | Down | 54.5 | 257.3 | Up | 11:04:52 - 11:26:47 | -1754 |
| Peachland | 11:15:50 | -39.2 | Dark | Down | 54.7 | 257.1 | Up | 11:04:52 - 11:26:47 | -1775 |
| Penticton | 11:15:49 | -39.2 | Dark | Down | 54.6 | 257.6 | Up | 11:04:51 - 11:26:46 | -1779 |
| Summerland | 11:15:49 | -39.2 | Dark | Down | 54.7 | 257.4 | Up | 11:04:51 - 11:26:46 | -1780 |
| Oliver | 11:15:47 | -39.3 | Dark | Down | 54.7 | 258.1 | Up | 11:04:50 - 11:26:45 | -1802 |
| Anarchist Mountain Observatory | 11:15:46 | -39.3 | Dark | Down | 54.6 | 258.5 | Up | 11:04:49 - 11:26:44 | -1804 |
| Tonasket | 11:15:45 | -39.5 | Dark | Down | 54.7 | 258.9 | Up | 11:04:47 - 11:26:42 | -1827 |
| Okanogan | 11:15:44 | -39.7 | Dark | Down | 54.9 | 259.2 | Up | 11:04:46 - 11:26:41 | -1856 |
| Brewster | 11:15:43 | -40.0 | Dark | Down | 55.1 | 259.4 | Up | 11:04:46 - 11:26:41 | -1883 |
| Manson/Chelan | 11:15:43 | -40.3 | Dark | Down | 55.4 | 259.3 | Up | 11:04:46 - 11:26:41 | -1914 |
| Wenatchee | 11:15:42 | -40.6 | Dark | Down | 55.6 | 259.9 | Up | 11:04:44 - 11:26:39 | -1954 |
| Pasco | 11:15:36 | -40.3 | Dark | Down | 54.9 | 262.6 | Up | 11:04:39 - 11:26:34 | -1974 |
| PNWRO | 11:15:35 | -40.3 | Dark | Down | 54.8 | 263.1 | Up | 11:04:37 - 11:26:32 | -1980 |
| Ellensburg | 11:15:41 | -40.9 | Dark | Down | 55.8 | 260.3 | Up | 11:04:44 - 11:26:39 | -1992 |
| Yakima | 11:15:39 | -41.1 | Dark | Down | 55.9 | 260.8 | Up | 11:04:42 - 11:26:37 | -2021 |
| Victoria | 11:15:51 | -41.9 | Dark | Down | 57.3 | 255.3 | Up | 11:04:54 - 11:26:49 | -2023 |
| Toppenish/White Swan | 11:15:38 | -41.1 | Dark | Down | 55.8 | 261.3 | Up | 11:04:41 - 11:26:36 | -2027 |
| Goldendale | 11:15:37 | -41.6 | Dark | Down | 56.2 | 261.7 | Up | 11:04:40 - 11:26:35 | -2086 |
| The Dalles | 11:15:37 | -41.9 | Dark | Down | 56.4 | 261.7 | Up | 11:04:40 - 11:26:35 | -2119 |
| Maupin | 11:15:36 | -42.0 | Dark | Down | 56.4 | 262.4 | Up | 11:04:38 - 11:26:33 | -2143 |
| Redmond | 11:15:33 | -42.5 | Dark | Down | 56.6 | 263.7 | Up | 11:04:35 - 11:26:30 | -2211 |
| Sisters | 11:15:34 | -42.7 | Dark | Down | 56.9 | 263.4 | Up | 11:04:36 - 11:26:31 | -2229 |
| Bend | 11:15:31 | -42.7 | Dark | Down | 56.7 | 263.9 | Up | 11:04:34 - 11:26:29 | -2233 |
| Oregon Observatory | 11:15:32 | -42.8 | Dark | Down | 56.9 | 264.1 | Up | 11:04:34 - 11:26:29 | -2252 |
| La Pine/Gilchrist | 11:15:31 | -42.9 | Dark | Down | 56.9 | 264.3 | Up | 11:04:34 - 11:26:29 | -2270 |
| North Lake | 11:15:29 | -42.7 | Dark | Down | 56.5 | 265.5 | Up | 11:04:31 - 11:26:26 | -2270 |
| Paisley | 11:15:26 | -42.7 | Dark | Down | 56.3 | 266.6 | Up | 11:04:28 - 11:26:23 | -2291 |
| Lakeview | 11:15:23 | -42.7 | Dark | Down | 56.2 | 267.5 | Up | 11:04:26 - 11:26:21 | -2318 |
| Cedarville | 11:15:21 | -42.9 | Dark | Down | 56.1 | 268.6 | Up | 11:04:24 - 11:26:19 | -2356 |
| Klamath Falls | 11:15:27 | -43.7 | Dark | Down | 57.2 | 266.4 | Up | 11:04:30 - 11:26:25 | -2389 |
| Tonopah | 11:15:05 | -41.8 | Dark | Down | 53.8 | 275.2 | Up | 11:04:07 - 11:26:02 | -2448 |
| Patrick | 11:14:49 | -39.9 | Dark | Down | 50.8 | 280.1 | Up | 11:03:52 - 11:25:47 | -2451 |
| Fall River/Burney | 11:15:22 | -43.9 | Dark | Down | 57.0 | 268.4 | Up | 11:04:24 - 11:26:19 | -2455 |
| George/Scottsdale | 11:14:40 | -38.5 | Dark | Down | 48.9 | 282.9 | Up | 11:03:43 - 11:25:38 | -2457 |
| Susanville | 11:15:19 | -43.6 | Dark | Down | 56.5 | 269.9 | Up | 11:04:21 - 11:26:16 | -2462 |
| Henderson | 11:14:54 | -40.6 | Dark | Down | 51.8 | 278.9 | Up | 11:03:57 - 11:25:52 | -2470 |
| Indian Springs | 11:14:56 | -41.0 | Dark | Down | 52.4 | 277.9 | Up | 11:03:59 - 11:25:54 | -2470 |
| Kingman/Dolan Springs | 11:14:50 | -40.1 | Dark | Down | 50.9 | 280.3 | Up | 11:03:52 - 11:25:47 | -2479 |
| Reno | 11:15:15 | -43.3 | Dark | Down | 55.8 | 271.7 | Up | 11:04:17 - 11:26:12 | -2482 |
| Yerington | 11:15:11 | -43.0 | Dark | Down | 55.3 | 272.9 | Up | 11:04:14 - 11:26:09 | -2487 |
| Hawthorne | 11:15:09 | -42.8 | Dark | Down | 54.9 | 273.8 | Up | 11:04:11 - 11:26:06 | -2492 |
| Gimple | 11:15:18 | -43.9 | Dark | Down | 56.7 | 270.2 | Up | 11:04:21 - 11:26:16 | -2494 |
| Portola | 11:15:16 | -43.7 | Dark | Down | 56.4 | 270.9 | Up | 11:04:18 - 11:26:13 | -2497 |
| Greenville | 11:15:18 | -43.9 | Dark | Down | 56.7 | 270.1 | Up | 11:04:20 - 11:26:15 | -2498 |
| Carson City | 11:15:13 | -43.4 | Dark | Down | 55.8 | 272.2 | Up | 11:04:16 - 11:26:11 | -2507 |
| Beatty | 11:15:00 | -41.8 | Dark | Down | 53.3 | 277.0 | Up | 11:04:02 - 11:25:57 | -2507 |
| Laughlin/Bullhead City | 11:14:51 | -40.5 | Dark | Down | 51.3 | 280.2 | Up | 11:03:53 - 11:25:48 | -2511 |
| Quincy | 11:15:17 | -44.0 | Dark | Down | 56.7 | 270.4 | Up | 11:04:20 - 11:26:15 | -2513 |
| Gardnerville | 11:15:12 | -43.5 | Dark | Down | 55.8 | 272.6 | Up | 11:04:15 - 11:26:10 | -2522 |
| Mohave Valley | 11:14:50 | -40.5 | Dark | Down | 51.3 | 280.5 | Up | 11:03:52 - 11:25:47 | -2530 |
| Lake Havasu City | 11:14:47 | -40.4 | Dark | Down | 51.0 | 281.1 | Up | 11:03:50 - 11:25:45 | -2545 |
| Lee Vining | 11:15:08 | -43.3 | Dark | Down | 55.2 | 274.4 | Up | 11:04:10 - 11:26:05 | -2560 |
| Bishop | 11:15:05 | -42.9 | Dark | Down | 54.6 | 275.6 | Up | 11:04:07 - 11:26:02 | -2565 |
| Parker | 11:14:46 | -40.4 | Dark | Down | 50.9 | 281.5 | Up | 11:03:49 - 11:25:44 | -2569 |
| Blythe | 11:14:46 | -40.8 | Dark | Down | 51.1 | 282.0 | Up | 11:03:48 - 11:25:43 | -2626 |
| Yuma | 11:14:43 | -41.0 | Dark | Down | 50.9 | 283.1 | Up | 11:03:45 - 11:25:40 | -2697 |
| Calipatria | 11:14:45 | -41.6 | Dark | Down | 51.7 | 282.3 | Up | 11:03:48 - 11:25:43 | -2718 |
| Idyllwild | 11:14:50 | -42.5 | Dark | Down | 52.8 | 281.2 | Up | 11:03:52 - 11:25:47 | -2741 |
| Wildwood | 11:14:54 | -43.9 | Dark | Down | 54.4 | 280.0 | Up | 11:03:57 - 11:25:52 | -2824 |
| CPSLO | 11:15:03 | -45.2 | Dark | Down | 56.2 | 277.5 | Up | 11:04:05 - 11:26:00 | -2849 |
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 530955, (2021/02/08 11:18UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 21.45 128 13 LMi 09:42:42.7 +35:05:35 6.1 2.44 139 PPM 074710 09:42:34.6 +32:59:42 7.9 0.43 139 PPM 074723 09:43:39.4 +32:28:47 11.0 0.20 139 530955 09:43:54.3 +32:40:04 15.4 139 Positions are for J2000
Event circumstances last updated at 2020/12/30 19:56:05 UT
Marc W. Buie, Southwest Research Institute