Event between (517717) 15KZ120 and star GA1580:03033490 with event index number of 1059841
Geocentric closest approach at 2021/02/19 05:30:24 UTC
J2000 position of star is 20:51:51.4 +69:19:27
Equinox of date position of star is 20:52:01.5 +69:24:14
Stellar brightness G=16.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 78 degrees from the moon.
Moon is 45% illuminated.
TNO apparent brightness V=20.2
[RECON map]
TNO is 9.2 AU from the Sun
and 9.3 AU from the Earth.
The TNO is moving 41.8
km/sec on the sky relative to the star, or,
22.4 arcsec/hr.
The 1-sigma error in the time of the event is 8 seconds.
The 1-sigma cross-track error in the shadow position is
337 km.
The sky-plane scale is
6734.7 km/arcsec.
The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 1.4 sec chord
Diameter=23.5 km assuming a 30% albedo -- 0.6 sec chord
Dynamical classification is CENTAURR
Star training set for 517717, (2021/02/19 05:30UT) Object RA Dec mag sep mel Deneb 20:42:09.2 +45:21:24 1.3 24.08 86 Alderamin 21:19:05.0 +62:40:32 2.4 7.26 76 PPM 010752 21:06:30.2 +71:31:00 6.3 2.43 76 PPM 022401 20:48:38.2 +69:44:14 7.7 0.45 78 PPM 022426 20:51:15.2 +69:40:53 9.2 0.29 77 517717 20:52:01.5 +69:24:16 16.8 77 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 4.7 km
RECON observability=0.6 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) |
| Dunrhomin | 05:31:33 | -53.1 | Dark | Up | 19.7 | 357.8 | Really Low | 05:30:23 - 05:32:43 | 3265 |
| George/Scottsdale | 05:31:48 | -52.9 | Dark | Up | 13.4 | 355.5 | Really Low | 05:30:38 - 05:32:58 | 3099 |
| Patrick | 05:31:51 | -50.6 | Dark | Up | 15.3 | 354.8 | Really Low | 05:30:41 - 05:33:01 | 2960 |
| Yuma | 05:31:53 | -51.3 | Dark | Up | 12.6 | 354.5 | Really Low | 05:30:43 - 05:33:03 | 2958 |
| Parker | 05:31:52 | -50.9 | Dark | Up | 14.0 | 354.6 | Really Low | 05:30:42 - 05:33:02 | 2957 |
| Kingman/Dolan Springs | 05:31:51 | -50.6 | Dark | Up | 15.1 | 354.7 | Really Low | 05:30:41 - 05:33:01 | 2954 |
| Lake Havasu City | 05:31:52 | -50.7 | Dark | Up | 14.4 | 354.6 | Really Low | 05:30:42 - 05:33:02 | 2950 |
| Blythe | 05:31:53 | -50.9 | Dark | Up | 13.5 | 354.5 | Really Low | 05:30:43 - 05:33:03 | 2948 |
| Mohave Valley | 05:31:52 | -50.3 | Dark | Up | 14.8 | 354.5 | Really Low | 05:30:42 - 05:33:02 | 2929 |
| Laughlin/Bullhead City | 05:31:51 | -50.2 | Dark | Up | 15.1 | 354.5 | Really Low | 05:30:41 - 05:33:01 | 2924 |
| Calipatria | 05:31:55 | -50.4 | Dark | Up | 13.1 | 354.2 | Really Low | 05:30:45 - 05:33:05 | 2900 |
| Henderson | 05:31:52 | -49.5 | Dark | Up | 16.0 | 354.3 | Really Low | 05:30:42 - 05:33:02 | 2887 |
| Indian Springs | 05:31:53 | -48.7 | Dark | Up | 16.6 | 354.1 | Really Low | 05:30:43 - 05:33:03 | 2838 |
| Idyllwild | 05:31:56 | -49.3 | Dark | Up | 13.8 | 353.8 | Really Low | 05:30:46 - 05:33:06 | 2823 |
| Beatty | 05:31:54 | -47.8 | Dark | Up | 17.0 | 353.7 | Really Low | 05:30:44 - 05:33:04 | 2771 |
| Tonopah | 05:31:54 | -47.0 | Dark | Up | 18.2 | 353.5 | Really Low | 05:30:44 - 05:33:04 | 2724 |
| Wildwood | 05:31:59 | -47.7 | Dark | Up | 14.4 | 353.1 | Really Low | 05:30:49 - 05:33:09 | 2704 |
| Bishop | 05:31:57 | -46.5 | Dark | Up | 17.6 | 353.1 | Really Low | 05:30:47 - 05:33:07 | 2668 |
| Hawthorne | 05:31:56 | -45.8 | Dark | Up | 18.8 | 352.9 | Really Low | 05:30:46 - 05:33:06 | 2634 |
| Lee Vining | 05:31:57 | -45.7 | Dark | Up | 18.3 | 352.8 | Really Low | 05:30:47 - 05:33:07 | 2616 |
| Yerington | 05:31:56 | -45.2 | Dark | Up | 19.3 | 352.7 | Really Low | 05:30:46 - 05:33:06 | 2594 |
| CPSLO | 05:32:01 | -45.7 | Dark | Up | 15.8 | 352.4 | Really Low | 05:30:51 - 05:33:11 | 2561 |
| Gardnerville | 05:31:58 | -44.8 | Dark | Up | 19.3 | 352.5 | Really Low | 05:30:48 - 05:33:08 | 2561 |
| Carson City | 05:31:57 | -44.7 | Dark | Up | 19.5 | 352.5 | Really Low | 05:30:47 - 05:33:07 | 2553 |
| Reno | 05:31:57 | -44.5 | Dark | Up | 19.9 | 352.5 | Really Low | 05:30:47 - 05:33:07 | 2545 |
| Portola | 05:31:57 | -43.9 | Dark | Up | 20.2 | 352.2 | Low | 05:30:47 - 05:33:07 | 2502 |
| Cedarville | 05:31:56 | -43.3 | Dark | Up | 21.9 | 352.2 | Low | 05:30:46 - 05:33:06 | 2484 |
| Susanville | 05:31:57 | -43.5 | Dark | Up | 20.9 | 352.1 | Low | 05:30:47 - 05:33:07 | 2480 |
| Gimple | 05:31:58 | -43.5 | Dark | Up | 20.6 | 352.1 | Low | 05:30:48 - 05:33:08 | 2472 |
| Quincy | 05:31:58 | -43.5 | Dark | Up | 20.4 | 352.1 | Low | 05:30:48 - 05:33:08 | 2471 |
| Greenville | 05:31:58 | -43.4 | Dark | Up | 20.6 | 352.0 | Low | 05:30:48 - 05:33:08 | 2467 |
| Lakeview | 05:31:55 | -42.9 | Dark | Up | 22.6 | 352.1 | Low | 05:30:45 - 05:33:05 | 2460 |
| PNWRO | 05:31:50 | -41.8 | Dark | Up | 26.2 | 352.4 | Low | 05:30:40 - 05:33:00 | 2441 |
| Paisley | 05:31:55 | -42.5 | Dark | Up | 23.1 | 352.0 | Low | 05:30:45 - 05:33:05 | 2438 |
| Fall River/Burney | 05:31:58 | -42.7 | Dark | Up | 21.6 | 351.8 | Low | 05:30:48 - 05:33:08 | 2423 |
| Pasco | 05:31:49 | -41.5 | Dark | Up | 26.5 | 352.3 | Low | 05:30:39 - 05:32:59 | 2421 |
| North Lake | 05:31:55 | -42.0 | Dark | Up | 23.7 | 351.9 | Low | 05:30:45 - 05:33:05 | 2405 |
| Klamath Falls | 05:31:58 | -41.9 | Dark | Up | 22.8 | 351.6 | Low | 05:30:48 - 05:33:08 | 2377 |
| Redmond | 05:31:54 | -41.3 | Dark | Up | 24.7 | 351.7 | Low | 05:30:44 - 05:33:04 | 2365 |
| Bend | 05:31:55 | -41.3 | Dark | Up | 24.5 | 351.7 | Low | 05:30:45 - 05:33:05 | 2362 |
| La Pine/Gilchrist | 05:31:55 | -41.4 | Dark | Up | 24.2 | 351.6 | Low | 05:30:45 - 05:33:05 | 2361 |
| Oregon Observatory | 05:31:55 | -41.4 | Dark | Up | 24.4 | 351.6 | Low | 05:30:45 - 05:33:05 | 2359 |
| Toppenish/White Swan | 05:31:51 | -40.7 | Dark | Up | 26.7 | 351.9 | Low | 05:30:41 - 05:33:01 | 2351 |
| Maupin | 05:31:54 | -40.9 | Dark | Up | 25.6 | 351.7 | Low | 05:30:44 - 05:33:04 | 2347 |
| Goldendale | 05:31:52 | -40.8 | Dark | Up | 26.2 | 351.7 | Low | 05:30:42 - 05:33:02 | 2344 |
| Sisters | 05:31:55 | -41.1 | Dark | Up | 24.8 | 351.6 | Low | 05:30:45 - 05:33:05 | 2342 |
| Yakima | 05:31:51 | -40.5 | Dark | Up | 27.0 | 351.8 | Low | 05:30:41 - 05:33:01 | 2337 |
| Okanogan | 05:31:48 | -40.1 | Dark | Up | 28.6 | 352.0 | Low | 05:30:38 - 05:32:58 | 2334 |
| Brewster | 05:31:49 | -40.1 | Dark | Up | 28.4 | 352.0 | Low | 05:30:39 - 05:32:59 | 2332 |
| Tonasket | 05:31:48 | -40.0 | Dark | Up | 28.9 | 352.0 | Low | 05:30:38 - 05:32:58 | 2331 |
| The Dalles | 05:31:53 | -40.6 | Dark | Up | 26.0 | 351.6 | Low | 05:30:43 - 05:33:03 | 2330 |
| Ellensburg | 05:31:51 | -40.3 | Dark | Up | 27.4 | 351.7 | Low | 05:30:41 - 05:33:01 | 2326 |
| Wenatchee | 05:31:50 | -40.2 | Dark | Up | 27.8 | 351.8 | Low | 05:30:40 - 05:33:00 | 2325 |
| Anarchist Mountain Observatory | 05:31:47 | -39.8 | Dark | Up | 29.2 | 352.0 | Low | 05:30:37 - 05:32:57 | 2325 |
| Manson/Chelan | 05:31:49 | -40.0 | Dark | Up | 28.2 | 351.8 | Low | 05:30:39 - 05:32:59 | 2320 |
| Oliver | 05:31:47 | -39.6 | Dark | Up | 29.4 | 352.0 | Low | 05:30:37 - 05:32:57 | 2310 |
| Penticton | 05:31:47 | -39.4 | Dark | Up | 29.8 | 351.9 | Low | 05:30:37 - 05:32:57 | 2298 |
| Kelowna | 05:31:46 | -39.3 | Dark | Up | 30.1 | 351.9 | Up | 05:30:36 - 05:32:56 | 2292 |
| Summerland | 05:31:47 | -39.3 | Dark | Up | 29.9 | 351.9 | Low | 05:30:37 - 05:32:57 | 2291 |
| Clarence Fulton | 05:31:46 | -39.1 | Dark | Up | 30.5 | 352.0 | Up | 05:30:36 - 05:32:56 | 2286 |
| Peachland | 05:31:47 | -39.2 | Dark | Up | 30.0 | 351.8 | Up | 05:30:37 - 05:32:57 | 2281 |
| Victoria | 05:31:52 | -37.9 | Dark | Up | 29.2 | 350.5 | Low | 05:30:42 - 05:33:02 | 2132 |
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, (2021/02/19 05:30UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 24.08 86 Alderamin 21:18:35.2 +62:35:09 2.4 7.26 76 PPM 010752 21:06:23.1 +71:25:52 6.3 2.43 76 PPM 022401 20:48:29.8 +69:39:30 7.7 0.45 78 PPM 022426 20:51:06.1 +69:36:05 9.2 0.29 77 517717 20:51:51.4 +69:19:27 16.8 77 Positions are for J2000
Event circumstances last updated at 2020/12/21 23:55:16 UT
Marc W. Buie, Southwest Research Institute