Event between (535985) 15BF515 and star GA1140:03119124 with event index number of 1618796
Geocentric closest approach at 2021/03/04 09:28:21 UTC
J2000 position of star is 08:53:05.3 +24:13:12
Equinox of date position of star is 08:54:19.2 +24:08:22
Stellar brightness G=16.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 103 degrees from the moon.
Moon is 69% illuminated.
TNO apparent brightness V=22.6
[RECON map]
TNO is 18.4 AU from the Sun
and 17.5 AU from the Earth.
The TNO is moving 19.2
km/sec on the sky relative to the star, or,
5.4 arcsec/hr.
The 1-sigma error in the time of the event is 65 seconds.
The 1-sigma cross-track error in the shadow position is
1197 km.
The sky-plane scale is
12719.4 km/arcsec.
The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 3.3 sec chord
Diameter=25.8 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 535985, (2021/03/04 09:28UT) Object RA Dec mag sep mel Pollux 07:46:36.5 +27:58:24 1.1 15.67 118 69Nu Cnc 09:03:58.3 +24:22:05 5.4 2.21 101 PPM 099167 08:57:28.0 +24:21:55 7.1 0.75 102 PPM 099106 08:53:23.8 +24:13:41 8.6 0.23 103 535985 08:54:19.6 +24:08:21 16.5 103 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 25.9 km
RECON observability=1.0 and success probability=6.6%
| 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 | 09:25:36 | -43.2 | Dark | Up | 42.9 | 256.0 | Up | 09:19:40 - 09:31:33 | 3939 |
| Kelowna | 09:25:35 | -43.6 | Dark | Up | 43.1 | 256.2 | Up | 09:19:39 - 09:31:32 | 3901 |
| Peachland | 09:25:36 | -43.8 | Dark | Up | 43.3 | 256.0 | Up | 09:19:39 - 09:31:32 | 3885 |
| Summerland | 09:25:35 | -43.9 | Dark | Up | 43.3 | 256.3 | Up | 09:19:39 - 09:31:32 | 3874 |
| Penticton | 09:25:34 | -43.9 | Dark | Up | 43.2 | 256.4 | Up | 09:19:38 - 09:31:31 | 3871 |
| Oliver | 09:25:34 | -44.2 | Dark | Up | 43.3 | 256.7 | Up | 09:19:37 - 09:31:30 | 3840 |
| Anarchist Mountain Observatory | 09:25:32 | -44.3 | Dark | Up | 43.3 | 257.1 | Up | 09:19:36 - 09:31:29 | 3829 |
| Tonasket | 09:25:32 | -44.6 | Dark | Up | 43.4 | 257.3 | Up | 09:19:35 - 09:31:28 | 3800 |
| Okanogan | 09:25:31 | -45.0 | Dark | Up | 43.5 | 257.5 | Up | 09:19:34 - 09:31:27 | 3767 |
| Brewster | 09:25:31 | -45.3 | Dark | Up | 43.7 | 257.5 | Up | 09:19:34 - 09:31:27 | 3738 |
| Manson/Chelan | 09:25:30 | -45.6 | Dark | Up | 44.0 | 257.4 | Up | 09:19:34 - 09:31:27 | 3710 |
| Victoria | 09:25:41 | -45.9 | Dark | Up | 45.9 | 253.9 | Up | 09:19:45 - 09:31:38 | 3693 |
| Wenatchee | 09:25:29 | -46.0 | Dark | Up | 44.2 | 257.7 | Up | 09:19:33 - 09:31:26 | 3664 |
| Ellensburg | 09:25:29 | -46.5 | Dark | Up | 44.5 | 257.9 | Up | 09:19:32 - 09:31:25 | 3621 |
| Pasco | 09:25:23 | -46.7 | Dark | Up | 43.7 | 259.8 | Up | 09:19:26 - 09:31:19 | 3588 |
| Yakima | 09:25:27 | -46.9 | Dark | Up | 44.6 | 258.3 | Up | 09:19:31 - 09:31:24 | 3584 |
| PNWRO | 09:25:21 | -46.8 | Dark | Up | 43.6 | 260.2 | Up | 09:19:24 - 09:31:17 | 3571 |
| Toppenish/White Swan | 09:25:26 | -47.0 | Dark | Up | 44.5 | 258.6 | Up | 09:19:30 - 09:31:23 | 3568 |
| Goldendale | 09:25:26 | -47.6 | Dark | Up | 44.9 | 258.8 | Up | 09:19:29 - 09:31:22 | 3507 |
| The Dalles | 09:25:26 | -47.9 | Dark | Up | 45.2 | 258.7 | Up | 09:19:29 - 09:31:22 | 3477 |
| Maupin | 09:25:24 | -48.3 | Dark | Up | 45.2 | 259.2 | Up | 09:19:27 - 09:31:20 | 3441 |
| Dunrhomin | 09:24:32 | -45.0 | Dark | Up | 34.0 | 274.5 | Up | 09:18:35 - 09:30:28 | 3437 |
| Redmond | 09:25:22 | -49.1 | Dark | Up | 45.4 | 260.0 | Up | 09:19:26 - 09:31:19 | 3355 |
| Sisters | 09:25:23 | -49.2 | Dark | Up | 45.7 | 259.7 | Up | 09:19:26 - 09:31:19 | 3347 |
| Bend | 09:25:22 | -49.4 | Dark | Up | 45.6 | 260.1 | Up | 09:19:25 - 09:31:18 | 3332 |
| Oregon Observatory | 09:25:21 | -49.6 | Dark | Up | 45.7 | 260.2 | Up | 09:19:25 - 09:31:18 | 3312 |
| La Pine/Gilchrist | 09:25:21 | -49.8 | Dark | Up | 45.8 | 260.3 | Up | 09:19:24 - 09:31:17 | 3291 |
| North Lake | 09:25:18 | -50.0 | Dark | Up | 45.4 | 261.2 | Up | 09:19:22 - 09:31:15 | 3266 |
| Paisley | 09:25:16 | -50.3 | Dark | Up | 45.3 | 262.1 | Up | 09:19:19 - 09:31:12 | 3223 |
| Lakeview | 09:25:13 | -50.7 | Dark | Up | 45.2 | 262.7 | Up | 09:19:17 - 09:31:10 | 3179 |
| Klamath Falls | 09:25:17 | -51.2 | Dark | Up | 46.2 | 261.6 | Up | 09:19:21 - 09:31:14 | 3147 |
| Cedarville | 09:25:11 | -51.2 | Dark | Up | 45.1 | 263.5 | Up | 09:19:14 - 09:31:07 | 3122 |
| Fall River/Burney | 09:25:13 | -52.1 | Dark | Up | 46.1 | 263.1 | Up | 09:19:16 - 09:31:09 | 3043 |
| Susanville | 09:25:09 | -52.4 | Dark | Up | 45.6 | 264.3 | Up | 09:19:12 - 09:31:05 | 3002 |
| Gimple | 09:25:09 | -52.7 | Dark | Up | 45.8 | 264.4 | Up | 09:19:12 - 09:31:05 | 2970 |
| Greenville | 09:25:09 | -52.7 | Dark | Up | 45.9 | 264.3 | Up | 09:19:13 - 09:31:06 | 2968 |
| Portola | 09:25:07 | -52.8 | Dark | Up | 45.6 | 265.0 | Up | 09:19:10 - 09:31:03 | 2949 |
| Quincy | 09:25:09 | -52.9 | Dark | Up | 45.9 | 264.5 | Up | 09:19:12 - 09:31:05 | 2948 |
| Reno | 09:25:04 | -52.8 | Dark | Up | 45.1 | 265.7 | Up | 09:19:07 - 09:31:00 | 2940 |
| Carson City | 09:25:03 | -53.1 | Dark | Up | 45.1 | 266.1 | Up | 09:19:06 - 09:30:59 | 2906 |
| Yerington | 09:25:01 | -53.0 | Dark | Up | 44.6 | 266.7 | Up | 09:19:04 - 09:30:57 | 2905 |
| Gardnerville | 09:25:02 | -53.3 | Dark | Up | 45.1 | 266.4 | Up | 09:19:06 - 09:30:59 | 2884 |
| Hawthorne | 09:24:58 | -53.2 | Dark | Up | 44.2 | 267.5 | Up | 09:19:02 - 09:30:55 | 2874 |
| Tonopah | 09:24:53 | -52.9 | Dark | Up | 43.2 | 268.9 | Up | 09:18:56 - 09:30:49 | 2869 |
| Lee Vining | 09:24:58 | -53.8 | Dark | Up | 44.7 | 267.7 | Up | 09:19:01 - 09:30:54 | 2806 |
| Beatty | 09:24:48 | -53.6 | Dark | Up | 42.8 | 270.2 | Up | 09:18:52 - 09:30:45 | 2769 |
| Indian Springs | 09:24:45 | -53.3 | Dark | Up | 42.0 | 271.1 | Up | 09:18:48 - 09:30:41 | 2769 |
| Bishop | 09:24:54 | -54.0 | Dark | Up | 44.1 | 268.8 | Up | 09:18:58 - 09:30:51 | 2768 |
| Henderson | 09:24:41 | -53.4 | Dark | Up | 41.4 | 272.0 | Up | 09:18:45 - 09:30:38 | 2738 |
| Patrick | 09:24:36 | -53.3 | Dark | Up | 40.5 | 273.1 | Up | 09:18:40 - 09:30:33 | 2711 |
| Kingman/Dolan Springs | 09:24:36 | -53.5 | Dark | Up | 40.6 | 273.2 | Up | 09:18:40 - 09:30:33 | 2684 |
| Laughlin/Bullhead City | 09:24:38 | -53.8 | Dark | Up | 41.0 | 273.0 | Up | 09:18:41 - 09:30:34 | 2665 |
| Mohave Valley | 09:24:37 | -54.0 | Dark | Up | 41.0 | 273.2 | Up | 09:18:41 - 09:30:34 | 2639 |
| George/Scottsdale | 09:24:27 | -53.3 | Dark | Up | 38.7 | 275.6 | Up | 09:18:30 - 09:30:23 | 2609 |
| Lake Havasu City | 09:24:35 | -54.2 | Dark | Up | 40.8 | 273.7 | Up | 09:18:39 - 09:30:32 | 2607 |
| Parker | 09:24:34 | -54.4 | Dark | Up | 40.8 | 274.0 | Up | 09:18:38 - 09:30:31 | 2574 |
| Blythe | 09:24:34 | -55.0 | Dark | Up | 41.0 | 274.3 | Up | 09:18:37 - 09:30:30 | 2513 |
| CPSLO | 09:24:55 | -56.7 | Dark | Up | 46.0 | 269.5 | Up | 09:18:59 - 09:30:52 | 2500 |
| Idyllwild | 09:24:40 | -56.1 | Dark | Up | 42.7 | 273.1 | Up | 09:18:43 - 09:30:36 | 2459 |
| Wildwood | 09:24:46 | -56.8 | Dark | Up | 44.3 | 271.8 | Up | 09:18:50 - 09:30:43 | 2439 |
| Calipatria | 09:24:35 | -55.9 | Dark | Up | 41.7 | 274.3 | Up | 09:18:39 - 09:30:32 | 2435 |
| Yuma | 09:24:31 | -55.7 | Dark | Up | 40.9 | 275.1 | Up | 09:18:35 - 09:30:28 | 2420 |
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 535985, (2021/03/04 09:28UT) Object RA Dec mag sep mel Pollux 07:45:18.0 +28:01:33 1.1 15.67 118 69Nu Cnc 09:02:44.2 +24:27:10 5.4 2.21 101 PPM 099167 08:56:13.7 +24:26:51 7.1 0.75 102 PPM 099106 08:52:09.4 +24:18:32 8.6 0.23 103 535985 08:53:05.3 +24:13:12 16.5 103 Positions are for J2000
Event circumstances last updated at 2021/01/18 22:09:13 UT
Marc W. Buie, Southwest Research Institute