Event between (576257) 12JD68 and star GA0960:06160827 with event index number of 2529020
Geocentric closest approach at 2027/06/28 07:55:04 UTC
J2000 position of star is 18:10:35.3 +06:40:58
Equinox of date position of star is 18:11:39.7 +06:41:20
Stellar brightness G=14.3,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 102 degrees from the moon.
Moon is 39% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 28.1 AU from the Sun
and 27.2 AU from the Earth.
The TNO is moving 22.9
km/sec on the sky relative to the star, or,
4.2 arcsec/hr.
The 1-sigma error in the time of the event is 269 seconds.
The 1-sigma cross-track error in the shadow position is
1026 km.
The sky-plane scale is
19749.5 km/arcsec.
The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 6.0 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 576257, (2027/06/28 07:55UT) Object RA Dec mag sep mel Vega 18:37:52.1 +38:48:37 0.0 32.65 88 60Bet Oph 17:44:49.9 +04:33:28 2.8 7.07 109 71 Oph 18:08:37.3 +08:44:22 5.6 2.21 102 PPM 165204 18:08:37.3 +06:42:23 8.0 0.82 103 PPM 165362 18:13:26.5 +06:51:44 9.2 0.41 101 PPM 165312 18:11:41.2 +06:31:14 11.3 0.18 102 576257 18:11:55.5 +06:41:25 14.3 101 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
3.3 sigma about the mid-time.
The median site spacing is 26.7 km
RECON observability=1.0 and success probability=12.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 07:54:07 | -13.9 | AT | Up | 42.7 | 202.1 | Up | 07:39:07 - 08:09:07 | 3315 |
| Kamloops | 07:54:50 | -16.0 | AT | Up | 46.0 | 182.7 | Up | 07:39:50 - 08:09:50 | 3235 |
| Kelowna | 07:54:47 | -16.8 | AT | Up | 46.8 | 184.0 | Up | 07:39:47 - 08:09:47 | 3167 |
| Peachland | 07:54:48 | -17.0 | AT | Up | 46.9 | 183.6 | Up | 07:39:48 - 08:09:48 | 3159 |
| Summerland | 07:54:47 | -17.1 | AT | Up | 47.0 | 183.8 | Up | 07:39:47 - 08:09:47 | 3146 |
| Penticton | 07:54:47 | -17.2 | AT | Up | 47.1 | 183.9 | Up | 07:39:47 - 08:09:47 | 3140 |
| Oliver | 07:54:48 | -17.5 | AT | Up | 47.4 | 183.9 | Up | 07:39:48 - 08:09:48 | 3112 |
| Anarchist Mountain Observatory | 07:54:47 | -17.7 | AT | Up | 47.6 | 184.2 | Up | 07:39:47 - 08:09:47 | 3097 |
| Tonasket | 07:54:47 | -18.0 | Dark | Up | 47.9 | 184.2 | Up | 07:39:47 - 08:09:47 | 3072 |
| Victoria | 07:55:00 | -18.0 | Dark | Down | 48.2 | 178.3 | Up | 07:40:00 - 08:10:00 | 3071 |
| Okanogan | 07:54:47 | -18.3 | Dark | Up | 48.3 | 184.0 | Up | 07:39:47 - 08:09:47 | 3044 |
| Brewster | 07:54:48 | -18.6 | Dark | Up | 48.5 | 183.7 | Up | 07:39:48 - 08:09:48 | 3022 |
| Manson/Chelan | 07:54:49 | -18.8 | Dark | Up | 48.8 | 183.2 | Up | 07:39:49 - 08:09:49 | 3006 |
| Wenatchee | 07:54:50 | -19.3 | Dark | Up | 49.2 | 182.9 | Up | 07:39:50 - 08:09:50 | 2967 |
| Ellensburg | 07:54:51 | -19.7 | Dark | Up | 49.7 | 182.6 | Up | 07:39:51 - 08:09:51 | 2933 |
| Yakima | 07:54:51 | -20.1 | Dark | Up | 50.1 | 182.6 | Up | 07:39:51 - 08:09:51 | 2898 |
| Toppenish/White Swan | 07:54:50 | -20.3 | Dark | Up | 50.3 | 182.9 | Up | 07:39:50 - 08:09:50 | 2879 |
| PNWRO | 07:54:45 | -20.7 | Dark | Up | 50.6 | 185.2 | Up | 07:39:45 - 08:09:45 | 2842 |
| Goldendale | 07:54:52 | -20.8 | Dark | Up | 50.8 | 182.3 | Up | 07:39:52 - 08:09:52 | 2833 |
| The Dalles | 07:54:53 | -21.1 | Dark | Up | 51.1 | 181.7 | Up | 07:39:53 - 08:09:53 | 2815 |
| Maupin | 07:54:53 | -21.5 | Dark | Up | 51.5 | 181.9 | Up | 07:39:53 - 08:09:53 | 2779 |
| Sisters | 07:54:55 | -22.3 | Dark | Down | 52.4 | 181.1 | Up | 07:39:55 - 08:09:55 | 2704 |
| Bend | 07:54:53 | -22.6 | Dark | Down | 52.6 | 181.6 | Up | 07:39:53 - 08:09:53 | 2682 |
| Oregon Observatory | 07:54:54 | -22.8 | Dark | Down | 52.8 | 181.4 | Up | 07:39:54 - 08:09:54 | 2667 |
| North Lake | 07:54:52 | -23.4 | Dark | Down | 53.4 | 182.3 | Up | 07:39:52 - 08:09:52 | 2608 |
| Chiloquin | 07:54:56 | -24.1 | Dark | Down | 54.1 | 180.7 | Up | 07:39:56 - 08:09:56 | 2552 |
| Klamath Falls | 07:54:56 | -24.4 | Dark | Down | 54.5 | 180.8 | Up | 07:39:56 - 08:09:56 | 2520 |
| Lakeview | 07:54:51 | -24.5 | Dark | Down | 54.5 | 183.3 | Up | 07:39:51 - 08:09:51 | 2511 |
| Cedarville | 07:54:50 | -25.2 | Dark | Down | 55.1 | 183.6 | Up | 07:39:50 - 08:09:50 | 2451 |
| Fall River/Burney | 07:54:54 | -25.6 | Dark | Down | 55.6 | 181.5 | Up | 07:39:54 - 08:09:54 | 2411 |
| Susanville | 07:54:52 | -26.3 | Dark | Down | 56.2 | 182.9 | Up | 07:39:52 - 08:09:52 | 2350 |
| Greenville | 07:54:53 | -26.5 | Dark | Down | 56.5 | 182.4 | Up | 07:39:53 - 08:09:53 | 2326 |
| Gimple | 07:54:53 | -26.5 | Dark | Down | 56.5 | 182.5 | Up | 07:39:53 - 08:09:53 | 2325 |
| Quincy | 07:54:53 | -26.7 | Dark | Down | 56.7 | 182.4 | Up | 07:39:53 - 08:09:53 | 2307 |
| Portola | 07:54:51 | -26.9 | Dark | Down | 56.8 | 183.3 | Up | 07:39:51 - 08:09:51 | 2294 |
| Dunrhomin | 07:53:56 | -25.4 | Dark | Up | 53.2 | 208.7 | Up | 07:38:56 - 08:08:56 | 2293 |
| Reno | 07:54:49 | -27.1 | Dark | Down | 57.1 | 184.4 | Up | 07:39:49 - 08:09:49 | 2266 |
| Carson City | 07:54:49 | -27.5 | Dark | Down | 57.4 | 184.5 | Up | 07:39:49 - 08:09:49 | 2233 |
| Yerington | 07:54:46 | -27.7 | Dark | Down | 57.6 | 185.7 | Up | 07:39:46 - 08:09:46 | 2212 |
| Gardnerville | 07:54:49 | -27.8 | Dark | Down | 57.7 | 184.6 | Up | 07:39:49 - 08:09:49 | 2210 |
| Hawthorne | 07:54:45 | -28.2 | Dark | Down | 58.0 | 186.8 | Up | 07:39:45 - 08:09:45 | 2166 |
| Tonopah | 07:54:39 | -28.7 | Dark | Up | 58.3 | 189.5 | Up | 07:39:39 - 08:09:39 | 2117 |
| Lee Vining | 07:54:46 | -28.7 | Dark | Down | 58.6 | 185.9 | Up | 07:39:46 - 08:09:46 | 2115 |
| Bishop | 07:54:44 | -29.4 | Dark | Down | 59.1 | 187.4 | Up | 07:39:44 - 08:09:44 | 2055 |
| Beatty | 07:54:37 | -29.8 | Dark | Up | 59.4 | 190.7 | Up | 07:39:37 - 08:09:37 | 2004 |
| Indian Springs | 07:54:33 | -30.1 | Dark | Up | 59.5 | 192.8 | Up | 07:39:33 - 08:09:33 | 1969 |
| Henderson | 07:54:31 | -30.6 | Dark | Up | 59.9 | 194.4 | Up | 07:39:31 - 08:09:31 | 1915 |
| Patrick | 07:54:26 | -31.2 | Dark | Up | 60.3 | 196.8 | Up | 07:39:26 - 08:09:26 | 1850 |
| Kingman/Dolan Springs | 07:54:27 | -31.4 | Dark | Up | 60.5 | 196.5 | Up | 07:39:27 - 08:09:27 | 1829 |
| Laughlin/Bullhead City | 07:54:29 | -31.5 | Dark | Up | 60.7 | 195.5 | Up | 07:39:29 - 08:09:29 | 1828 |
| Mohave Valley | 07:54:29 | -31.7 | Dark | Up | 60.9 | 195.7 | Up | 07:39:29 - 08:09:29 | 1801 |
| Lake Havasu City | 07:54:28 | -32.1 | Dark | Up | 61.3 | 196.4 | Up | 07:39:28 - 08:09:28 | 1761 |
| Wildwood | 07:54:45 | -32.6 | Dark | Down | 62.4 | 187.8 | Up | 07:39:45 - 08:09:45 | 1738 |
| Parker | 07:54:27 | -32.5 | Dark | Up | 61.6 | 196.6 | Up | 07:39:27 - 08:09:27 | 1727 |
| Idyllwild | 07:54:37 | -33.0 | Dark | Up | 62.5 | 191.9 | Up | 07:39:37 - 08:09:37 | 1695 |
| George/Scottsdale | 07:54:18 | -32.7 | Dark | Up | 61.3 | 201.7 | Up | 07:39:18 - 08:09:18 | 1677 |
| Calipatria | 07:54:32 | -33.6 | Dark | Up | 62.8 | 194.6 | Up | 07:39:32 - 08:09:32 | 1630 |
| Yuma | 07:54:29 | -33.9 | Dark | Up | 63.1 | 196.7 | Up | 07:39:29 - 08:09:29 | 1584 |
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 576257, (2027/06/28 07:55UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 32.65 88 60Bet Oph 17:43:28.3 +04:34:06 2.8 7.07 109 71 Oph 18:07:18.4 +08:44:03 5.6 2.21 102 PPM 165204 18:07:17.1 +06:42:03 8.0 0.82 103 PPM 165362 18:12:06.4 +06:51:13 9.2 0.41 101 PPM 165312 18:10:20.8 +06:30:47 11.3 0.18 102 576257 18:10:35.3 +06:40:58 14.3 102 Positions are for J2000
Event circumstances last updated at 2022/01/26 00:32:50 UT
Marc W. Buie, Southwest Research Institute