Event between 99XY143 and star GA1080:02480575 with event index number of 1026580
Geocentric closest approach at 2020/12/28 06:48:51 UTC
J2000 position of star is 06:53:22.5 +19:30:53
Equinox of date position of star is 06:54:36.7 +19:29:15
Stellar brightness G=15.2,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 27 degrees from the moon.
Moon is 97% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 44.9 AU from the Sun
and 43.9 AU from the Earth.
The TNO is moving 25.8
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 62 seconds.
The 1-sigma cross-track error in the shadow position is
1594 km.
The sky-plane scale is
31872.9 km/arcsec.
The TNO has an absolute magnitude Hv=6.2
Diameter=351.6 km assuming a 5% albedo -- 13.6 sec chord
Diameter=143.5 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is CLASSICAL
Star training set for 99XY143, (2020/12/28 06:49UT) Object RA Dec mag sep mel Pollux 07:46:35.9 +27:58:26 1.1 14.60 38 Alhena 06:38:55.5 +16:22:47 1.9 4.86 24 PPM 123009 06:47:35.0 +18:48:50 6.5 1.79 25 PPM 123199 06:54:22.0 +19:25:01 8.4 0.09 27 99XY143 06:54:36.7 +19:29:15 15.2 27 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 25.4 km
RECON observability=1.0 and success probability=0.1%
| 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 | 06:50:02 | -59.9 | Dark | Up | 54.3 | 141.0 | Up | 06:44:24 - 06:55:41 | 8693 |
| Kelowna | 06:50:03 | -60.1 | Dark | Up | 54.5 | 140.4 | Up | 06:44:25 - 06:55:42 | 8657 |
| Peachland | 06:50:04 | -60.1 | Dark | Up | 54.5 | 139.9 | Up | 06:44:25 - 06:55:42 | 8648 |
| Summerland | 06:50:04 | -60.3 | Dark | Up | 54.6 | 139.9 | Up | 06:44:25 - 06:55:42 | 8633 |
| Penticton | 06:50:03 | -60.4 | Dark | Up | 54.7 | 140.0 | Up | 06:44:25 - 06:55:42 | 8626 |
| Oliver | 06:50:05 | -60.7 | Dark | Up | 55.0 | 139.7 | Up | 06:44:26 - 06:55:43 | 8592 |
| Anarchist Mountain Observatory | 06:50:03 | -60.9 | Dark | Up | 55.2 | 139.8 | Up | 06:44:25 - 06:55:42 | 8575 |
| Victoria | 06:50:15 | -59.6 | Dark | Up | 53.8 | 133.6 | Up | 06:44:37 - 06:55:54 | 8551 |
| Tonasket | 06:50:04 | -61.1 | Dark | Up | 55.4 | 139.4 | Up | 06:44:26 - 06:55:43 | 8545 |
| Okanogan | 06:50:06 | -61.3 | Dark | Up | 55.6 | 138.9 | Up | 06:44:27 - 06:55:44 | 8513 |
| Brewster | 06:50:07 | -61.5 | Dark | Up | 55.7 | 138.3 | Up | 06:44:28 - 06:55:45 | 8488 |
| Manson/Chelan | 06:50:07 | -61.5 | Dark | Up | 55.7 | 137.6 | Up | 06:44:29 - 06:55:46 | 8469 |
| Wenatchee | 06:50:08 | -61.8 | Dark | Up | 56.0 | 136.9 | Up | 06:44:30 - 06:55:47 | 8424 |
| Ellensburg | 06:50:09 | -62.0 | Dark | Up | 56.2 | 136.1 | Up | 06:44:30 - 06:55:47 | 8385 |
| Yakima | 06:50:10 | -62.4 | Dark | Up | 56.5 | 135.7 | Up | 06:44:31 - 06:55:48 | 8345 |
| Toppenish/White Swan | 06:50:08 | -62.6 | Dark | Up | 56.7 | 135.7 | Up | 06:44:30 - 06:55:47 | 8322 |
| Pasco | 06:50:06 | -63.2 | Dark | Up | 57.4 | 137.5 | Up | 06:44:28 - 06:55:45 | 8304 |
| PNWRO | 06:50:06 | -63.5 | Dark | Up | 57.7 | 137.5 | Up | 06:44:27 - 06:55:44 | 8278 |
| Goldendale | 06:50:10 | -62.8 | Dark | Up | 56.9 | 134.5 | Up | 06:44:32 - 06:55:49 | 8270 |
| The Dalles | 06:50:13 | -62.8 | Dark | Up | 56.9 | 133.7 | Up | 06:44:34 - 06:55:51 | 8250 |
| Maupin | 06:50:12 | -63.2 | Dark | Up | 57.2 | 133.4 | Up | 06:44:34 - 06:55:51 | 8208 |
| Sisters | 06:50:14 | -63.6 | Dark | Up | 57.6 | 131.7 | Up | 06:44:36 - 06:55:53 | 8123 |
| Redmond | 06:50:13 | -63.8 | Dark | Up | 57.8 | 132.2 | Up | 06:44:34 - 06:55:51 | 8118 |
| Bend | 06:50:14 | -63.9 | Dark | Up | 57.9 | 131.8 | Up | 06:44:36 - 06:55:53 | 8097 |
| Oregon Observatory | 06:50:14 | -64.0 | Dark | Up | 57.9 | 131.4 | Up | 06:44:35 - 06:55:52 | 8081 |
| La Pine/Gilchrist | 06:50:15 | -64.1 | Dark | Up | 58.0 | 131.1 | Up | 06:44:36 - 06:55:53 | 8060 |
| North Lake | 06:50:14 | -64.7 | Dark | Up | 58.6 | 131.4 | Up | 06:44:35 - 06:55:52 | 8013 |
| Paisley | 06:50:13 | -65.3 | Dark | Up | 59.2 | 131.2 | Up | 06:44:34 - 06:55:51 | 7954 |
| Klamath Falls | 06:50:17 | -65.0 | Dark | Up | 58.8 | 128.9 | Up | 06:44:39 - 06:55:56 | 7915 |
| Lakeview | 06:50:13 | -65.8 | Dark | Up | 59.6 | 130.9 | Up | 06:44:34 - 06:55:51 | 7902 |
| Cedarville | 06:50:14 | -66.3 | Dark | Up | 60.1 | 130.3 | Up | 06:44:35 - 06:55:52 | 7833 |
| Fall River/Burney | 06:50:17 | -66.0 | Dark | Up | 59.7 | 127.9 | Up | 06:44:39 - 06:55:56 | 7791 |
| Susanville | 06:50:16 | -66.8 | Dark | Up | 60.6 | 128.1 | Up | 06:44:38 - 06:55:55 | 7721 |
| Greenville | 06:50:16 | -66.8 | Dark | Up | 60.6 | 127.3 | Up | 06:44:38 - 06:55:55 | 7695 |
| Gimple | 06:50:17 | -66.9 | Dark | Up | 60.6 | 127.4 | Up | 06:44:39 - 06:55:56 | 7694 |
| Quincy | 06:50:17 | -67.0 | Dark | Up | 60.7 | 127.0 | Up | 06:44:38 - 06:55:55 | 7674 |
| Dunrhomin | 06:49:27 | -72.8 | Dark | Up | 67.9 | 157.1 | Up | 06:43:48 - 06:55:05 | 7664 |
| Portola | 06:50:16 | -67.3 | Dark | Up | 61.1 | 127.5 | Up | 06:44:37 - 06:55:54 | 7658 |
| Reno | 06:50:14 | -67.9 | Dark | Up | 61.6 | 128.1 | Up | 06:44:36 - 06:55:53 | 7626 |
| Carson City | 06:50:14 | -68.1 | Dark | Up | 61.8 | 127.6 | Up | 06:44:36 - 06:55:53 | 7588 |
| Yerington | 06:50:12 | -68.6 | Dark | Up | 62.4 | 128.2 | Up | 06:44:34 - 06:55:51 | 7564 |
| Gardnerville | 06:50:14 | -68.3 | Dark | Up | 62.0 | 127.3 | Up | 06:44:36 - 06:55:53 | 7563 |
| Hawthorne | 06:50:10 | -69.2 | Dark | Up | 63.0 | 128.4 | Up | 06:44:32 - 06:55:49 | 7513 |
| Lee Vining | 06:50:13 | -69.3 | Dark | Up | 63.0 | 126.7 | Up | 06:44:34 - 06:55:51 | 7456 |
| Tonopah | 06:50:07 | -70.4 | Dark | Up | 64.1 | 129.9 | Up | 06:44:28 - 06:55:45 | 7456 |
| Bishop | 06:50:10 | -70.2 | Dark | Up | 63.8 | 126.9 | Up | 06:44:32 - 06:55:49 | 7389 |
| Beatty | 06:50:06 | -71.4 | Dark | Up | 65.1 | 128.8 | Up | 06:44:27 - 06:55:44 | 7332 |
| Indian Springs | 06:50:03 | -72.3 | Dark | Up | 66.0 | 130.0 | Up | 06:44:24 - 06:55:41 | 7292 |
| Henderson | 06:50:01 | -73.0 | Dark | Up | 66.8 | 130.3 | Up | 06:44:22 - 06:55:39 | 7233 |
| CPSLO | 06:50:20 | -69.9 | Dark | Up | 63.5 | 120.1 | Up | 06:44:41 - 06:55:58 | 7185 |
| Patrick | 06:49:57 | -74.1 | Dark | Up | 67.8 | 131.2 | Up | 06:44:19 - 06:55:36 | 7162 |
| Kingman/Dolan Springs | 06:49:58 | -74.2 | Dark | Up | 67.9 | 130.5 | Up | 06:44:20 - 06:55:37 | 7139 |
| Laughlin/Bullhead City | 06:50:00 | -73.9 | Dark | Up | 67.6 | 129.5 | Up | 06:44:21 - 06:55:38 | 7138 |
| Mohave Valley | 06:50:00 | -74.1 | Dark | Up | 67.7 | 129.0 | Up | 06:44:21 - 06:55:38 | 7109 |
| Lake Havasu City | 06:49:59 | -74.5 | Dark | Up | 68.2 | 128.7 | Up | 06:44:21 - 06:55:38 | 7065 |
| Wildwood | 06:50:14 | -72.0 | Dark | Up | 65.5 | 120.9 | Up | 06:44:35 - 06:55:52 | 7042 |
| Parker | 06:49:59 | -74.8 | Dark | Up | 68.4 | 128.0 | Up | 06:44:21 - 06:55:38 | 7027 |
| Idyllwild | 06:50:07 | -73.5 | Dark | Up | 67.0 | 123.1 | Up | 06:44:29 - 06:55:46 | 6994 |
| George/Scottsdale | 06:49:51 | -76.5 | Dark | Up | 70.2 | 131.9 | Up | 06:44:13 - 06:55:30 | 6974 |
| Blythe | 06:50:00 | -74.9 | Dark | Up | 68.5 | 126.4 | Up | 06:44:22 - 06:55:39 | 6972 |
| Calipatria | 06:50:04 | -74.6 | Dark | Up | 68.2 | 123.8 | Up | 06:44:25 - 06:55:42 | 6923 |
| Yuma | 06:50:01 | -75.5 | Dark | Up | 69.0 | 124.4 | Up | 06:44:23 - 06:55:40 | 6872 |
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 99XY143, (2020/12/28 06:49UT) Object RA Dec mag sep mel Pollux 07:45:18.0 +28:01:33 1.1 14.60 38 Alhena 06:37:42.8 +16:23:57 1.9 4.86 24 PPM 123009 06:46:21.1 +18:50:16 6.5 1.79 25 PPM 123199 06:53:07.8 +19:26:39 8.4 0.09 27 99XY143 06:53:22.5 +19:30:53 15.2 27 Positions are for J2000
Event circumstances last updated at 2020/12/24 00:08:31 UT
Marc W. Buie, Southwest Research Institute