Event between 01KO77 and star GA0760:11633115 with event index number of 1065519
Geocentric closest approach at 2021/07/12 08:55:54 UTC
J2000 position of star is 18:01:47.8 -13:59:35
Equinox of date position of star is 18:03:00.6 -13:59:31
Stellar brightness G=16.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 131 degrees from the moon.
Moon is 6% illuminated.
TNO apparent brightness V=23.4
[RECON map]
TNO is 37.6 AU from the Sun
and 36.6 AU from the Earth.
The TNO is moving 22.7
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 614 seconds.
The 1-sigma cross-track error in the shadow position is
4913 km.
The sky-plane scale is
26570.1 km/arcsec.
The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 8.1 sec chord
Diameter=75.3 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is SCATEXTD
Star training set for 01KO77, (2021/07/12 08:56UT) Object RA Dec mag sep mel Antares 16:30:43.8 -26:28:41 0.9 24.92 113 35Eta Oph 17:11:36.9 -15:45:00 2.6 12.54 120 PPM 234113 18:10:56.7 -13:55:45 6.4 1.92 133 PPM 233896 18:01:56.9 -13:46:46 8.5 0.34 131 PPM 233926 18:03:08.5 -13:59:30 9.7 0.03 131 01KO77 18:03:01.2 -13:59:31 16.3 132 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
1.5 sigma about the mid-time.
The median site spacing is 17.0 km
RECON observability=0.9 and success probability=6.1%
| 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 | 08:54:12 | -16.9 | AT | Down | 19.1 | 215.3 | Really Low | 08:39:12 - 09:09:12 | 3715 |
| Kelowna | 08:54:12 | -17.4 | AT | Down | 19.5 | 215.2 | Really Low | 08:39:12 - 09:09:12 | 3696 |
| Peachland | 08:54:12 | -17.5 | AT | Down | 19.7 | 215.0 | Really Low | 08:39:12 - 09:09:12 | 3694 |
| Summerland | 08:54:12 | -17.6 | AT | Down | 19.7 | 215.1 | Really Low | 08:39:12 - 09:09:12 | 3685 |
| Penticton | 08:54:11 | -17.7 | AT | Down | 19.8 | 215.2 | Really Low | 08:39:11 - 09:09:11 | 3680 |
| Victoria | 08:54:20 | -19.1 | Dark | Down | 22.0 | 211.8 | Low | 08:39:20 - 09:09:20 | 3662 |
| Oliver | 08:54:11 | -18.0 | Dark | Down | 20.0 | 215.3 | Low | 08:39:11 - 09:09:11 | 3661 |
| Anarchist Mountain Observatory | 08:54:10 | -18.2 | Dark | Down | 20.1 | 215.5 | Low | 08:39:10 - 09:09:10 | 3651 |
| Tonasket | 08:54:09 | -18.5 | Dark | Down | 20.4 | 215.5 | Low | 08:39:09 - 09:09:09 | 3634 |
| Okanogan | 08:54:09 | -18.8 | Dark | Down | 20.7 | 215.4 | Low | 08:39:09 - 09:09:09 | 3617 |
| Brewster | 08:54:09 | -19.1 | Dark | Down | 21.0 | 215.3 | Low | 08:39:09 - 09:09:09 | 3604 |
| Manson/Chelan | 08:54:10 | -19.4 | Dark | Down | 21.3 | 215.0 | Low | 08:39:10 - 09:09:10 | 3596 |
| Wenatchee | 08:54:09 | -19.9 | Dark | Down | 21.8 | 214.9 | Low | 08:39:09 - 09:09:09 | 3571 |
| Ellensburg | 08:54:09 | -20.3 | Dark | Down | 22.2 | 214.8 | Low | 08:39:09 - 09:09:09 | 3550 |
| Yakima | 08:54:08 | -20.7 | Dark | Down | 22.6 | 214.9 | Low | 08:39:08 - 09:09:08 | 3527 |
| Toppenish/White Swan | 08:54:08 | -20.9 | Dark | Down | 22.7 | 215.1 | Low | 08:39:08 - 09:09:08 | 3512 |
| Pasco | 08:54:04 | -20.8 | Dark | Down | 22.3 | 216.3 | Low | 08:39:04 - 09:09:04 | 3492 |
| Goldendale | 08:54:08 | -21.5 | Dark | Down | 23.3 | 214.8 | Low | 08:39:08 - 09:09:08 | 3485 |
| PNWRO | 08:54:03 | -21.0 | Dark | Down | 22.4 | 216.6 | Low | 08:39:03 - 09:09:03 | 3475 |
| The Dalles | 08:54:08 | -21.8 | Dark | Down | 23.6 | 214.5 | Low | 08:39:08 - 09:09:08 | 3475 |
| Maupin | 08:54:08 | -22.2 | Dark | Down | 23.9 | 214.8 | Low | 08:39:08 - 09:09:08 | 3449 |
| Sisters | 08:54:07 | -23.1 | Dark | Down | 24.8 | 214.5 | Low | 08:39:07 - 09:09:07 | 3401 |
| Redmond | 08:54:06 | -23.1 | Dark | Down | 24.7 | 214.9 | Low | 08:39:06 - 09:09:06 | 3395 |
| Bend | 08:54:06 | -23.3 | Dark | Down | 24.9 | 214.8 | Low | 08:39:06 - 09:09:06 | 3384 |
| Oregon Observatory | 08:54:06 | -23.5 | Dark | Down | 25.1 | 214.7 | Low | 08:39:06 - 09:09:06 | 3375 |
| La Pine/Gilchrist | 08:54:06 | -23.7 | Dark | Down | 25.3 | 214.7 | Low | 08:39:06 - 09:09:06 | 3363 |
| North Lake | 08:54:03 | -24.0 | Dark | Down | 25.4 | 215.4 | Low | 08:39:03 - 09:09:03 | 3329 |
| Chiloquin | 08:54:05 | -24.8 | Dark | Down | 26.4 | 214.7 | Low | 08:39:05 - 09:09:05 | 3296 |
| Paisley | 08:54:01 | -24.5 | Dark | Down | 25.7 | 215.9 | Low | 08:39:01 - 09:09:01 | 3290 |
| Klamath Falls | 08:54:04 | -25.2 | Dark | Down | 26.6 | 214.9 | Low | 08:39:04 - 09:09:04 | 3273 |
| Lakeview | 08:54:00 | -25.0 | Dark | Down | 26.1 | 216.2 | Low | 08:39:00 - 09:09:00 | 3256 |
| Cedarville | 08:53:58 | -25.6 | Dark | Down | 26.5 | 216.6 | Low | 08:38:58 - 09:08:58 | 3211 |
| Fall River/Burney | 08:54:01 | -26.3 | Dark | Down | 27.4 | 215.6 | Low | 08:39:01 - 09:09:01 | 3192 |
| Susanville | 08:53:58 | -26.8 | Dark | Down | 27.6 | 216.5 | Low | 08:38:58 - 09:08:58 | 3142 |
| Greenville | 08:53:58 | -27.1 | Dark | Down | 28.0 | 216.3 | Low | 08:38:58 - 09:08:58 | 3126 |
| Gimple | 08:53:58 | -27.1 | Dark | Down | 27.9 | 216.3 | Low | 08:38:58 - 09:08:58 | 3125 |
| Quincy | 08:53:58 | -27.3 | Dark | Down | 28.1 | 216.3 | Low | 08:38:58 - 09:08:58 | 3112 |
| Portola | 08:53:56 | -27.3 | Dark | Down | 28.0 | 216.8 | Low | 08:38:56 - 09:08:56 | 3099 |
| Reno | 08:53:54 | -27.5 | Dark | Down | 27.9 | 217.5 | Low | 08:38:54 - 09:08:54 | 3073 |
| Carson City | 08:53:53 | -27.8 | Dark | Down | 28.2 | 217.7 | Low | 08:38:53 - 09:08:53 | 3048 |
| Gardnerville | 08:53:53 | -28.1 | Dark | Down | 28.4 | 217.8 | Low | 08:38:53 - 09:08:53 | 3031 |
| Yerington | 08:53:51 | -27.9 | Dark | Down | 28.1 | 218.3 | Low | 08:38:51 - 09:08:51 | 3027 |
| Hawthorne | 08:53:49 | -28.3 | Dark | Down | 28.2 | 219.0 | Low | 08:38:49 - 09:08:49 | 2988 |
| Lee Vining | 08:53:49 | -28.9 | Dark | Down | 28.9 | 218.7 | Low | 08:38:49 - 09:08:49 | 2955 |
| Tonopah | 08:53:43 | -28.4 | Dark | Down | 27.8 | 220.5 | Low | 08:38:43 - 09:08:43 | 2938 |
| Dunrhomin | 08:53:14 | -23.0 | Dark | Down | 19.7 | 230.2 | Really Low | 08:38:14 - 09:08:14 | 2925 |
| Bishop | 08:53:45 | -29.3 | Dark | Down | 29.0 | 219.6 | Low | 08:38:45 - 09:08:45 | 2902 |
| Beatty | 08:53:39 | -29.5 | Dark | Down | 28.5 | 221.3 | Low | 08:38:39 - 09:08:39 | 2848 |
| Indian Springs | 08:53:36 | -29.5 | Dark | Down | 28.2 | 222.4 | Low | 08:38:36 - 09:08:36 | 2810 |
| CPSLO | 08:53:50 | -31.8 | Dark | Down | 31.7 | 218.2 | Up | 08:38:50 - 09:08:50 | 2777 |
| Henderson | 08:53:33 | -29.9 | Dark | Down | 28.2 | 223.2 | Low | 08:38:33 - 09:08:33 | 2761 |
| Patrick | 08:53:28 | -30.2 | Dark | Down | 28.0 | 224.4 | Low | 08:38:28 - 09:08:28 | 2698 |
| Laughlin/Bullhead City | 08:53:30 | -30.6 | Dark | Down | 28.6 | 223.9 | Low | 08:38:30 - 09:08:30 | 2689 |
| Kingman/Dolan Springs | 08:53:28 | -30.4 | Dark | Down | 28.3 | 224.3 | Low | 08:38:28 - 09:08:28 | 2684 |
| Mohave Valley | 08:53:29 | -30.8 | Dark | Down | 28.8 | 224.0 | Low | 08:38:29 - 09:08:29 | 2668 |
| Wildwood | 08:53:41 | -32.6 | Dark | Down | 31.6 | 220.6 | Up | 08:38:41 - 09:08:41 | 2661 |
| Lake Havasu City | 08:53:28 | -31.2 | Dark | Down | 28.9 | 224.3 | Low | 08:38:28 - 09:08:28 | 2634 |
| Idyllwild | 08:53:34 | -32.5 | Dark | Down | 30.8 | 222.5 | Up | 08:38:34 - 09:08:34 | 2609 |
| Parker | 08:53:27 | -31.5 | Dark | Down | 29.2 | 224.5 | Low | 08:38:27 - 09:08:27 | 2606 |
| Blythe | 08:53:27 | -32.1 | Dark | Down | 29.7 | 224.4 | Low | 08:38:27 - 09:08:27 | 2570 |
| Calipatria | 08:53:30 | -32.8 | Dark | Down | 30.6 | 223.8 | Up | 08:38:30 - 09:08:30 | 2544 |
| George/Scottsdale | 08:53:19 | -31.2 | Dark | Down | 28.0 | 226.8 | Low | 08:38:19 - 09:08:19 | 2539 |
| Yuma | 08:53:26 | -32.9 | Dark | Down | 30.4 | 224.8 | Up | 08:38:26 - 09:08:26 | 2498 |
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 01KO77, (2021/07/12 08:56UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 24.92 113 35Eta Oph 17:10:22.7 -15:43:29 2.6 12.54 120 PPM 234113 18:09:43.4 -13:56:04 6.4 1.92 133 PPM 233896 18:00:43.6 -13:46:49 8.5 0.34 131 PPM 233926 18:01:55.1 -13:59:34 9.7 0.03 131 01KO77 18:01:47.8 -13:59:35 16.3 131 Positions are for J2000
Event circumstances last updated at 2021/05/17 01:05:02 UT
Marc W. Buie, Southwest Research Institute