Event between (517717) 15KZ120 and star GA1640:01820515 with event index number of 2627005
Geocentric closest approach at 2021/12/27 07:36:13 UTC
J2000 position of star is 22:37:55.1 +75:31:37
Equinox of date position of star is 22:38:22.7 +75:38:28
Stellar brightness G=13.2,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 102 degrees from the moon.
Moon is 48% illuminated.
TNO apparent brightness V=20.4
[RECON map]
TNO is 10.0 AU from the Sun
and 9.6 AU from the Earth.
The TNO is moving 35.5
km/sec on the sky relative to the star, or,
18.3 arcsec/hr.
The 1-sigma error in the time of the event is 19 seconds.
The 1-sigma cross-track error in the shadow position is
680 km.
The sky-plane scale is
6998.0 km/arcsec.
The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 1.6 sec chord
Diameter=23.5 km assuming a 30% albedo -- 0.7 sec chord
Dynamical classification is CENTAURR
Star training set for 517717, (2021/12/27 07:36UT) Object RA Dec mag sep mel Deneb 20:42:10.9 +45:21:35 1.3 32.69 111 PPM 000431 02:59:57.0 +89:21:21 2.0 14.10 90 PPM 011260 22:32:38.8 +76:20:24 5.7 0.78 101 PPM 011306 22:39:50.8 +75:46:21 8.2 0.16 102 517717 22:38:22.7 +75:38:29 13.2 102 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 16.8 km
RECON observability=1.0 and success probability=0.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| George/Scottsdale | 07:36:39 | -79.4 | Dark | Down | 25.9 | 345.9 | Low | 07:34:35 - 07:38:42 | 7606 |
| Yuma | 07:36:46 | -80.6 | Dark | Down | 25.5 | 345.6 | Low | 07:34:43 - 07:38:50 | 7575 |
| Blythe | 07:36:45 | -79.7 | Dark | Down | 26.4 | 345.5 | Low | 07:34:42 - 07:38:49 | 7538 |
| Calipatria | 07:36:48 | -80.1 | Dark | Down | 26.1 | 345.4 | Low | 07:34:45 - 07:38:52 | 7531 |
| Parker | 07:36:44 | -79.2 | Dark | Down | 26.8 | 345.5 | Low | 07:34:41 - 07:38:48 | 7525 |
| Lake Havasu City | 07:36:44 | -78.8 | Dark | Down | 27.2 | 345.4 | Low | 07:34:40 - 07:38:47 | 7509 |
| Kingman/Dolan Springs | 07:36:42 | -78.1 | Dark | Down | 27.8 | 345.4 | Low | 07:34:39 - 07:38:46 | 7487 |
| Mohave Valley | 07:36:44 | -78.4 | Dark | Down | 27.6 | 345.3 | Low | 07:34:41 - 07:38:48 | 7485 |
| Patrick | 07:36:41 | -77.9 | Dark | Down | 28.0 | 345.4 | Low | 07:34:38 - 07:38:45 | 7482 |
| Laughlin/Bullhead City | 07:36:44 | -78.1 | Dark | Down | 27.9 | 345.3 | Low | 07:34:40 - 07:38:47 | 7473 |
| Idyllwild | 07:36:50 | -79.3 | Dark | Down | 26.9 | 345.2 | Low | 07:34:46 - 07:38:53 | 7472 |
| Henderson | 07:36:44 | -77.2 | Dark | Down | 28.8 | 345.1 | Low | 07:34:40 - 07:38:47 | 7423 |
| Dunrhomin | 07:36:18 | -71.6 | Dark | Up | 31.0 | 346.3 | Up | 07:34:14 - 07:38:21 | 7411 |
| Wildwood | 07:36:53 | -78.5 | Dark | Down | 27.7 | 344.8 | Low | 07:34:50 - 07:38:57 | 7395 |
| Indian Springs | 07:36:45 | -76.7 | Dark | Down | 29.5 | 344.9 | Low | 07:34:41 - 07:38:48 | 7379 |
| Beatty | 07:36:47 | -76.2 | Dark | Down | 30.0 | 344.7 | Up | 07:34:44 - 07:38:51 | 7332 |
| CPSLO | 07:36:57 | -76.7 | Dark | Down | 29.3 | 344.4 | Low | 07:34:53 - 07:39:00 | 7272 |
| Tonopah | 07:36:47 | -75.0 | Dark | Down | 31.2 | 344.5 | Up | 07:34:43 - 07:38:50 | 7265 |
| Bishop | 07:36:50 | -75.4 | Dark | Down | 30.8 | 344.4 | Up | 07:34:46 - 07:38:53 | 7260 |
| Lee Vining | 07:36:51 | -74.7 | Dark | Down | 31.5 | 344.2 | Up | 07:34:48 - 07:38:55 | 7209 |
| Hawthorne | 07:36:50 | -74.3 | Dark | Down | 32.0 | 344.2 | Up | 07:34:46 - 07:38:53 | 7198 |
| Yerington | 07:36:50 | -73.7 | Dark | Down | 32.5 | 344.0 | Up | 07:34:46 - 07:38:53 | 7158 |
| Gardnerville | 07:36:51 | -73.6 | Dark | Down | 32.6 | 343.9 | Up | 07:34:48 - 07:38:55 | 7141 |
| Carson City | 07:36:51 | -73.4 | Dark | Down | 32.9 | 343.9 | Up | 07:34:47 - 07:38:54 | 7128 |
| Reno | 07:36:50 | -73.0 | Dark | Down | 33.2 | 343.8 | Up | 07:34:47 - 07:38:54 | 7110 |
| Portola | 07:36:52 | -72.6 | Dark | Down | 33.6 | 343.7 | Up | 07:34:48 - 07:38:55 | 7075 |
| Quincy | 07:36:52 | -72.4 | Dark | Down | 33.8 | 343.6 | Up | 07:34:49 - 07:38:56 | 7052 |
| Gimple | 07:36:52 | -72.2 | Dark | Down | 34.0 | 343.5 | Up | 07:34:49 - 07:38:56 | 7045 |
| Greenville | 07:36:52 | -72.2 | Dark | Down | 34.0 | 343.5 | Up | 07:34:49 - 07:38:56 | 7042 |
| Susanville | 07:36:51 | -72.0 | Dark | Down | 34.2 | 343.5 | Up | 07:34:48 - 07:38:55 | 7038 |
| Cedarville | 07:36:49 | -71.1 | Dark | Down | 35.2 | 343.4 | Up | 07:34:45 - 07:38:52 | 6998 |
| Fall River/Burney | 07:36:52 | -71.2 | Dark | Down | 35.0 | 343.3 | Up | 07:34:49 - 07:38:56 | 6981 |
| Lakeview | 07:36:48 | -70.4 | Dark | Down | 35.9 | 343.2 | Up | 07:34:45 - 07:38:52 | 6958 |
| Paisley | 07:36:48 | -69.9 | Dark | Down | 36.4 | 343.1 | Up | 07:34:44 - 07:38:51 | 6924 |
| Klamath Falls | 07:36:51 | -70.0 | Dark | Down | 36.2 | 343.0 | Up | 07:34:48 - 07:38:55 | 6907 |
| Chiloquin | 07:36:51 | -69.7 | Dark | Down | 36.5 | 342.9 | Up | 07:34:47 - 07:38:54 | 6887 |
| North Lake | 07:36:48 | -69.3 | Dark | Down | 37.0 | 342.9 | Up | 07:34:44 - 07:38:51 | 6883 |
| La Pine/Gilchrist | 07:36:49 | -68.7 | Dark | Down | 37.5 | 342.7 | Up | 07:34:45 - 07:38:52 | 6839 |
| Oregon Observatory | 07:36:48 | -68.5 | Dark | Down | 37.7 | 342.7 | Up | 07:34:45 - 07:38:52 | 6830 |
| Bend | 07:36:48 | -68.4 | Dark | Down | 37.9 | 342.6 | Up | 07:34:45 - 07:38:52 | 6824 |
| Redmond | 07:36:47 | -68.2 | Dark | Down | 38.0 | 342.6 | Up | 07:34:43 - 07:38:50 | 6817 |
| Sisters | 07:36:48 | -68.1 | Dark | Down | 38.1 | 342.5 | Up | 07:34:44 - 07:38:51 | 6803 |
| PNWRO | 07:36:41 | -67.0 | Dark | Down | 39.2 | 342.6 | Up | 07:34:37 - 07:38:44 | 6787 |
| Maupin | 07:36:46 | -67.4 | Dark | Down | 38.9 | 342.4 | Up | 07:34:43 - 07:38:50 | 6769 |
| Pasco | 07:36:40 | -66.7 | Dark | Down | 39.5 | 342.5 | Up | 07:34:37 - 07:38:44 | 6766 |
| The Dalles | 07:36:45 | -67.0 | Dark | Down | 39.3 | 342.3 | Up | 07:34:42 - 07:38:49 | 6741 |
| Goldendale | 07:36:44 | -66.8 | Dark | Down | 39.4 | 342.3 | Up | 07:34:41 - 07:38:48 | 6740 |
| Toppenish/White Swan | 07:36:43 | -66.4 | Dark | Down | 39.9 | 342.2 | Up | 07:34:39 - 07:38:46 | 6721 |
| Yakima | 07:36:43 | -66.1 | Dark | Down | 40.1 | 342.1 | Up | 07:34:40 - 07:38:47 | 6703 |
| Ellensburg | 07:36:43 | -65.7 | Dark | Down | 40.5 | 342.0 | Up | 07:34:39 - 07:38:46 | 6679 |
| Wenatchee | 07:36:42 | -65.4 | Dark | Down | 40.8 | 342.0 | Up | 07:34:38 - 07:38:45 | 6661 |
| Sleaford | 07:36:10 | -60.6 | Dark | Up | 42.6 | 343.8 | Up | 07:34:06 - 07:38:13 | 6639 |
| Manson/Chelan | 07:36:41 | -64.9 | Dark | Down | 41.3 | 341.9 | Up | 07:34:37 - 07:38:44 | 6637 |
| Brewster | 07:36:39 | -64.8 | Dark | Down | 41.4 | 341.9 | Up | 07:34:36 - 07:38:43 | 6634 |
| Okanogan | 07:36:39 | -64.5 | Dark | Down | 41.6 | 341.8 | Up | 07:34:35 - 07:38:42 | 6623 |
| Tonasket | 07:36:38 | -64.2 | Dark | Down | 41.9 | 341.8 | Up | 07:34:35 - 07:38:42 | 6607 |
| Anarchist Mountain Observatory | 07:36:38 | -63.9 | Dark | Down | 42.2 | 341.7 | Up | 07:34:34 - 07:38:41 | 6590 |
| Oliver | 07:36:38 | -63.8 | Dark | Down | 42.4 | 341.6 | Up | 07:34:34 - 07:38:41 | 6573 |
| Penticton | 07:36:38 | -63.4 | Dark | Down | 42.7 | 341.5 | Up | 07:34:34 - 07:38:41 | 6550 |
| Summerland | 07:36:38 | -63.3 | Dark | Down | 42.8 | 341.5 | Up | 07:34:34 - 07:38:41 | 6543 |
| Kelowna | 07:36:36 | -63.1 | Dark | Down | 43.0 | 341.4 | Up | 07:34:33 - 07:38:40 | 6532 |
| Peachland | 07:36:38 | -63.2 | Dark | Down | 42.9 | 341.4 | Up | 07:34:34 - 07:38:41 | 6531 |
| Victoria | 07:36:46 | -63.7 | Dark | Down | 42.5 | 341.1 | Up | 07:34:42 - 07:38:49 | 6497 |
| Kamloops | 07:36:37 | -62.2 | Dark | Down | 43.9 | 341.0 | Up | 07:34:34 - 07:38:41 | 6454 |
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 517717, (2021/12/27 07:36UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 32.69 111 PPM 000431 02:31:53.0 +89:15:50 2.0 14.10 90 PPM 011260 22:32:16.1 +76:13:35 5.7 0.78 101 PPM 011306 22:39:22.9 +75:39:28 8.2 0.16 102 517717 22:37:55.1 +75:31:37 13.2 102 Positions are for J2000
Event circumstances last updated at 2021/12/06 01:44:52 UT
Marc W. Buie, Southwest Research Institute