Event between 99RW215 and star GA1120:00508974 with event index number of 2100976
Geocentric closest approach at 2021/12/13 05:40:19 UTC
J2000 position of star is 03:55:30.5 +22:28:41
Equinox of date position of star is 03:56:48.4 +22:32:27
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 45 degrees from the moon.
Moon is 71% illuminated.
TNO apparent brightness V=22.8
[RECON map]
TNO is 30.9 AU from the Sun
and 30.0 AU from the Earth.
The TNO is moving 22.8
km/sec on the sky relative to the star, or,
3.8 arcsec/hr.
The 1-sigma error in the time of the event is 322 seconds.
The 1-sigma cross-track error in the shadow position is
2407 km.
The sky-plane scale is
21723.4 km/arcsec.
The TNO has an absolute magnitude Hv=7.9
Diameter=154.9 km assuming a 5% albedo -- 6.8 sec chord
Diameter=63.2 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 4:3E
Star training set for 99RW215, (2021/12/13 05:40UT) Object RA Dec mag sep mel Aldebaran 04:37:11.0 +16:33:06 0.8 11.23 53 44Zet Per 03:55:31.0 +31:56:49 2.8 9.41 49 32 Tau 03:58:10.1 +22:32:22 5.6 0.31 46 PPM 093042 03:55:19.6 +22:00:32 7.0 0.63 45 PPM 093077 03:57:21.7 +22:17:22 9.2 0.28 45 99RW215 03:56:48.4 +22:32:27 16.0 46 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
2.8 sigma about the mid-time.
The median site spacing is 25.4 km
RECON observability=1.0 and success probability=15.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 05:40:21 | -52.0 | Dark | Up | 60.3 | 157.2 | Up | 05:25:21 - 05:55:21 | 3845 |
| Kelowna | 05:40:20 | -53.0 | Dark | Up | 61.3 | 158.2 | Up | 05:25:20 - 05:55:20 | 3751 |
| Peachland | 05:40:22 | -52.9 | Dark | Up | 61.3 | 157.6 | Up | 05:25:22 - 05:55:22 | 3748 |
| Summerland | 05:40:22 | -53.0 | Dark | Up | 61.4 | 157.7 | Up | 05:25:22 - 05:55:22 | 3732 |
| Victoria | 05:40:35 | -51.5 | Dark | Up | 61.4 | 150.0 | Up | 05:25:35 - 05:55:35 | 3727 |
| Penticton | 05:40:21 | -53.1 | Dark | Up | 61.5 | 157.9 | Up | 05:25:21 - 05:55:21 | 3723 |
| Oliver | 05:40:22 | -53.3 | Dark | Up | 61.9 | 157.6 | Up | 05:25:22 - 05:55:22 | 3691 |
| Sleaford | 05:39:38 | -57.4 | Dark | Up | 60.3 | 184.2 | Up | 05:24:38 - 05:54:38 | 3681 |
| Anarchist Mountain Observatory | 05:40:22 | -53.5 | Dark | Up | 62.1 | 157.9 | Up | 05:25:22 - 05:55:22 | 3671 |
| Tonasket | 05:40:23 | -53.6 | Dark | Up | 62.3 | 157.5 | Up | 05:25:23 - 05:55:23 | 3644 |
| Okanogan | 05:40:23 | -53.7 | Dark | Up | 62.6 | 157.0 | Up | 05:25:23 - 05:55:23 | 3617 |
| Brewster | 05:40:24 | -53.8 | Dark | Up | 62.8 | 156.4 | Up | 05:25:24 - 05:55:24 | 3597 |
| Manson/Chelan | 05:40:26 | -53.7 | Dark | Up | 62.9 | 155.5 | Up | 05:25:26 - 05:55:26 | 3587 |
| Wenatchee | 05:40:27 | -53.8 | Dark | Up | 63.3 | 154.8 | Up | 05:25:27 - 05:55:27 | 3548 |
| Ellensburg | 05:40:29 | -53.9 | Dark | Up | 63.6 | 154.0 | Up | 05:25:29 - 05:55:29 | 3515 |
| Yakima | 05:40:30 | -54.1 | Dark | Up | 64.0 | 153.6 | Up | 05:25:30 - 05:55:30 | 3478 |
| Toppenish/White Swan | 05:40:30 | -54.3 | Dark | Up | 64.2 | 153.8 | Up | 05:25:30 - 05:55:30 | 3453 |
| Goldendale | 05:40:31 | -54.3 | Dark | Up | 64.6 | 152.4 | Up | 05:25:31 - 05:55:31 | 3413 |
| Pasco | 05:40:26 | -55.1 | Dark | Up | 64.7 | 156.2 | Up | 05:25:26 - 05:55:26 | 3410 |
| The Dalles | 05:40:33 | -54.2 | Dark | Up | 64.6 | 151.5 | Up | 05:25:33 - 05:55:33 | 3401 |
| PNWRO | 05:40:26 | -55.4 | Dark | Up | 65.0 | 156.5 | Up | 05:25:26 - 05:55:26 | 3381 |
| Maupin | 05:40:34 | -54.4 | Dark | Up | 65.0 | 151.3 | Up | 05:25:34 - 05:55:34 | 3360 |
| Sisters | 05:40:37 | -54.5 | Dark | Up | 65.6 | 149.3 | Up | 05:25:37 - 05:55:37 | 3290 |
| Redmond | 05:40:36 | -54.8 | Dark | Up | 65.8 | 150.1 | Up | 05:25:36 - 05:55:36 | 3277 |
| Bend | 05:40:37 | -54.8 | Dark | Up | 65.9 | 149.6 | Up | 05:25:37 - 05:55:37 | 3261 |
| Oregon Observatory | 05:40:37 | -54.8 | Dark | Up | 66.0 | 149.1 | Up | 05:25:37 - 05:55:37 | 3248 |
| La Pine/Gilchrist | 05:40:38 | -54.8 | Dark | Up | 66.2 | 148.8 | Up | 05:25:38 - 05:55:38 | 3230 |
| North Lake | 05:40:37 | -55.4 | Dark | Up | 66.8 | 149.5 | Up | 05:25:37 - 05:55:37 | 3172 |
| Chiloquin | 05:40:41 | -55.0 | Dark | Up | 67.0 | 146.7 | Up | 05:25:41 - 05:55:41 | 3134 |
| Paisley | 05:40:37 | -55.8 | Dark | Up | 67.4 | 149.6 | Up | 05:25:37 - 05:55:37 | 3110 |
| Klamath Falls | 05:40:41 | -55.2 | Dark | Up | 67.3 | 146.4 | Up | 05:25:41 - 05:55:41 | 3099 |
| Lakeview | 05:40:37 | -56.2 | Dark | Up | 67.9 | 149.4 | Up | 05:25:37 - 05:55:37 | 3056 |
| Cedarville | 05:40:38 | -56.6 | Dark | Up | 68.5 | 149.0 | Up | 05:25:38 - 05:55:38 | 2988 |
| Fall River/Burney | 05:40:43 | -55.9 | Dark | Up | 68.5 | 145.6 | Up | 05:25:43 - 05:55:43 | 2975 |
| Susanville | 05:40:41 | -56.6 | Dark | Up | 69.3 | 146.4 | Up | 05:25:41 - 05:55:41 | 2893 |
| Greenville | 05:40:43 | -56.5 | Dark | Up | 69.4 | 145.3 | Up | 05:25:43 - 05:55:43 | 2874 |
| Gimple | 05:40:43 | -56.6 | Dark | Up | 69.4 | 145.5 | Up | 05:25:43 - 05:55:43 | 2872 |
| Quincy | 05:40:44 | -56.6 | Dark | Up | 69.6 | 145.0 | Up | 05:25:44 - 05:55:44 | 2854 |
| Portola | 05:40:42 | -57.0 | Dark | Up | 69.9 | 145.9 | Up | 05:25:42 - 05:55:42 | 2829 |
| Reno | 05:40:40 | -57.5 | Dark | Up | 70.4 | 147.1 | Up | 05:25:40 - 05:55:40 | 2784 |
| Carson City | 05:40:41 | -57.7 | Dark | Up | 70.7 | 146.6 | Up | 05:25:41 - 05:55:41 | 2748 |
| Gardnerville | 05:40:41 | -57.8 | Dark | Up | 70.9 | 146.3 | Up | 05:25:41 - 05:55:41 | 2723 |
| Yerington | 05:40:39 | -58.2 | Dark | Up | 71.1 | 147.9 | Up | 05:25:39 - 05:55:39 | 2711 |
| Hawthorne | 05:40:38 | -58.8 | Dark | Up | 71.7 | 148.5 | Up | 05:25:38 - 05:55:38 | 2650 |
| Lee Vining | 05:40:40 | -58.6 | Dark | Up | 72.0 | 146.3 | Up | 05:25:40 - 05:55:40 | 2608 |
| Tonopah | 05:40:33 | -59.9 | Dark | Up | 72.7 | 151.6 | Up | 05:25:33 - 05:55:33 | 2564 |
| Bishop | 05:40:38 | -59.3 | Dark | Up | 72.8 | 147.2 | Up | 05:25:38 - 05:55:38 | 2527 |
| Dunrhomin | 05:39:47 | -66.7 | Dark | Up | 72.0 | 189.2 | Up | 05:24:47 - 05:54:47 | 2496 |
| Beatty | 05:40:34 | -60.7 | Dark | Up | 73.9 | 151.1 | Up | 05:25:34 - 05:55:34 | 2435 |
| CPSLO | 05:40:51 | -58.2 | Dark | Up | 73.3 | 137.1 | Up | 05:25:51 - 05:55:51 | 2387 |
| Indian Springs | 05:40:30 | -61.6 | Dark | Up | 74.6 | 153.9 | Up | 05:25:30 - 05:55:30 | 2372 |
| Henderson | 05:40:29 | -62.3 | Dark | Up | 75.3 | 155.3 | Up | 05:25:29 - 05:55:29 | 2298 |
| Patrick | 05:40:26 | -63.4 | Dark | Up | 76.2 | 158.2 | Up | 05:25:26 - 05:55:26 | 2204 |
| Wildwood | 05:40:45 | -60.1 | Dark | Up | 75.4 | 139.9 | Up | 05:25:45 - 05:55:45 | 2203 |
| Laughlin/Bullhead City | 05:40:28 | -62.9 | Dark | Up | 76.2 | 155.3 | Up | 05:25:28 - 05:55:28 | 2198 |
| Kingman/Dolan Springs | 05:40:26 | -63.3 | Dark | Up | 76.4 | 157.2 | Up | 05:25:26 - 05:55:26 | 2186 |
| Mohave Valley | 05:40:28 | -63.0 | Dark | Up | 76.5 | 154.8 | Up | 05:25:28 - 05:55:28 | 2170 |
| Lake Havasu City | 05:40:28 | -63.3 | Dark | Up | 76.9 | 155.0 | Up | 05:25:28 - 05:55:28 | 2122 |
| Idyllwild | 05:40:39 | -61.6 | Dark | Up | 76.6 | 144.9 | Up | 05:25:39 - 05:55:39 | 2111 |
| Parker | 05:40:28 | -63.4 | Dark | Up | 77.2 | 154.5 | Up | 05:25:28 - 05:55:28 | 2085 |
| Blythe | 05:40:31 | -63.4 | Dark | Up | 77.6 | 152.3 | Up | 05:25:31 - 05:55:31 | 2039 |
| Calipatria | 05:40:35 | -62.7 | Dark | Up | 77.6 | 147.7 | Up | 05:25:35 - 05:55:35 | 2014 |
| George/Scottsdale | 05:40:20 | -65.5 | Dark | Up | 78.3 | 163.7 | Up | 05:25:20 - 05:55:20 | 1975 |
| Yuma | 05:40:32 | -63.6 | Dark | Up | 78.4 | 150.1 | Up | 05:25:32 - 05:55:32 | 1944 |
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 99RW215, (2021/12/13 05:40UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 11.23 53 44Zet Per 03:54:07.9 +31:53:01 2.8 9.41 49 32 Tau 03:56:52.2 +22:28:38 5.6 0.31 46 PPM 093042 03:54:02.0 +21:56:44 7.0 0.63 45 PPM 093077 03:56:03.9 +22:13:37 9.2 0.28 45 99RW215 03:55:30.5 +22:28:41 16.0 45 Positions are for J2000
Event circumstances last updated at 2021/12/07 01:43:52 UT
Marc W. Buie, Southwest Research Institute