Event between (517717) 15KZ120 and star GA1720:00630313 with event index number of 2626956
Geocentric closest approach at 2021/10/01 04:03:53 UTC
J2000 position of star is 21:45:18.4 +83:04:15
Equinox of date position of star is 21:44:11.5 +83:10:16
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 72 degrees from the moon.
Moon is 30% illuminated.
TNO apparent brightness V=20.4
[RECON map]
TNO is 9.7 AU from the Sun
and 9.5 AU from the Earth.
The TNO is moving 18.8
km/sec on the sky relative to the star, or,
9.8 arcsec/hr.
The 1-sigma error in the time of the event is 38 seconds.
The 1-sigma cross-track error in the shadow position is
533 km.
The sky-plane scale is
6918.4 km/arcsec.
The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 3.1 sec chord
Diameter=23.5 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 517717, (2021/10/01 04:04UT) Object RA Dec mag sep mel PPM 000431 02:59:36.3 +89:21:18 2.0 6.73 66 PPM 004017 22:47:20.2 +83:16:10 6.0 1.86 71 PPM 003880 21:57:24.7 +82:58:32 8.3 0.44 72 PPM 003805 21:35:46.4 +83:01:09 9.2 0.30 73 PPM 003857 21:50:10.0 +83:17:41 10.9 0.21 72 517717 21:44:11.2 +83:10:17 16.4 72 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 5.8 km
RECON observability=1.0 and success probability=3.4%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Victoria | 04:07:06 | -22.5 | Dark | Down | 55.1 | 3.7 | Up | 04:03:25 - 04:10:48 | -1376 |
| Sisters | 04:07:24 | -25.3 | Dark | Down | 50.9 | 3.0 | Up | 04:03:43 - 04:11:06 | -1588 |
| The Dalles | 04:07:18 | -25.0 | Dark | Down | 52.2 | 3.0 | Up | 04:03:37 - 04:11:00 | -1594 |
| Chiloquin | 04:07:32 | -25.8 | Dark | Down | 49.2 | 2.9 | Up | 04:03:51 - 04:11:14 | -1596 |
| La Pine/Gilchrist | 04:07:27 | -25.6 | Dark | Down | 50.3 | 3.0 | Up | 04:03:46 - 04:11:09 | -1605 |
| Oregon Observatory | 04:07:26 | -25.5 | Dark | Down | 50.5 | 3.0 | Up | 04:03:45 - 04:11:08 | -1606 |
| Klamath Falls | 04:07:34 | -25.9 | Dark | Down | 48.8 | 2.9 | Up | 04:03:52 - 04:11:15 | -1609 |
| Maupin | 04:07:20 | -25.3 | Dark | Down | 51.8 | 3.0 | Up | 04:03:39 - 04:11:02 | -1610 |
| Bend | 04:07:25 | -25.6 | Dark | Down | 50.7 | 2.9 | Up | 04:03:44 - 04:11:07 | -1613 |
| Peachland | 04:06:58 | -24.2 | Dark | Down | 56.4 | 3.1 | Up | 04:03:16 - 04:10:39 | -1615 |
| Ellensburg | 04:07:11 | -24.9 | Dark | Down | 53.7 | 3.0 | Up | 04:03:30 - 04:10:53 | -1615 |
| Goldendale | 04:07:17 | -25.2 | Dark | Down | 52.5 | 3.0 | Up | 04:03:35 - 04:10:58 | -1618 |
| Redmond | 04:07:24 | -25.6 | Dark | Down | 50.9 | 2.9 | Up | 04:03:42 - 04:11:05 | -1620 |
| Yakima | 04:07:13 | -25.0 | Dark | Down | 53.2 | 3.0 | Up | 04:03:32 - 04:10:55 | -1622 |
| Wenatchee | 04:07:09 | -24.8 | Dark | Down | 54.1 | 3.0 | Up | 04:03:28 - 04:10:51 | -1623 |
| Summerland | 04:06:58 | -24.3 | Dark | Down | 56.3 | 3.0 | Up | 04:03:17 - 04:10:40 | -1625 |
| Manson/Chelan | 04:07:07 | -24.7 | Dark | Down | 54.6 | 3.0 | Up | 04:03:25 - 04:10:48 | -1626 |
| Kelowna | 04:06:57 | -24.3 | Dark | Down | 56.6 | 3.0 | Up | 04:03:15 - 04:10:38 | -1634 |
| Penticton | 04:06:59 | -24.4 | Dark | Down | 56.2 | 3.0 | Up | 04:03:17 - 04:10:40 | -1634 |
| Clarence Fulton | 04:06:55 | -24.2 | Dark | Down | 56.9 | 3.0 | Up | 04:03:13 - 04:10:36 | -1636 |
| Toppenish/White Swan | 04:07:14 | -25.2 | Dark | Down | 53.0 | 2.9 | Up | 04:03:33 - 04:10:56 | -1639 |
| Oliver | 04:07:00 | -24.5 | Dark | Down | 55.9 | 3.0 | Up | 04:03:19 - 04:10:42 | -1642 |
| Brewster | 04:07:06 | -24.9 | Dark | Down | 54.8 | 2.9 | Up | 04:03:24 - 04:10:47 | -1649 |
| Okanogan | 04:07:04 | -24.9 | Dark | Down | 55.1 | 2.9 | Up | 04:03:22 - 04:10:45 | -1658 |
| Anarchist Mountain Observatory | 04:07:01 | -24.7 | Dark | Down | 55.7 | 2.9 | Up | 04:03:19 - 04:10:42 | -1660 |
| North Lake | 04:07:29 | -26.2 | Dark | Down | 49.9 | 2.8 | Up | 04:03:47 - 04:11:10 | -1661 |
| Tonasket | 04:07:03 | -24.8 | Dark | Down | 55.4 | 2.9 | Up | 04:03:21 - 04:10:44 | -1661 |
| Fall River/Burney | 04:07:38 | -26.6 | Dark | Down | 47.7 | 2.8 | Up | 04:03:57 - 04:11:20 | -1661 |
| Paisley | 04:07:30 | -26.6 | Dark | Down | 49.4 | 2.7 | Up | 04:03:49 - 04:11:12 | -1700 |
| Greenville | 04:07:42 | -27.3 | Dark | Down | 46.8 | 2.7 | Up | 04:04:00 - 04:11:23 | -1715 |
| Quincy | 04:07:43 | -27.4 | Dark | Down | 46.6 | 2.6 | Up | 04:04:01 - 04:11:24 | -1719 |
| Gimple | 04:07:42 | -27.4 | Dark | Down | 46.8 | 2.6 | Up | 04:04:00 - 04:11:23 | -1722 |
| Lakeview | 04:07:33 | -26.9 | Dark | Down | 48.9 | 2.7 | Up | 04:03:51 - 04:11:14 | -1726 |
| Susanville | 04:07:40 | -27.4 | Dark | Down | 47.1 | 2.6 | Up | 04:03:59 - 04:11:22 | -1735 |
| Pasco | 04:07:14 | -26.1 | Dark | Down | 53.0 | 2.7 | Up | 04:03:32 - 04:10:55 | -1737 |
| Cedarville | 04:07:35 | -27.3 | Dark | Down | 48.2 | 2.6 | Up | 04:03:53 - 04:11:16 | -1753 |
| PNWRO | 04:07:14 | -26.3 | Dark | Down | 52.7 | 2.6 | Up | 04:03:33 - 04:10:56 | -1760 |
| Portola | 04:07:43 | -27.8 | Dark | Down | 46.5 | 2.6 | Up | 04:04:01 - 04:11:24 | -1761 |
| Reno | 04:07:43 | -28.3 | Dark | Down | 46.2 | 2.4 | Up | 04:04:02 - 04:11:25 | -1821 |
| CPSLO | 04:08:01 | -29.2 | Dark | Down | 42.0 | 2.4 | Up | 04:04:19 - 04:11:42 | -1827 |
| Carson City | 04:07:45 | -28.5 | Dark | Down | 45.9 | 2.4 | Up | 04:04:03 - 04:11:26 | -1830 |
| Gardnerville | 04:07:46 | -28.6 | Dark | Down | 45.6 | 2.4 | Up | 04:04:04 - 04:11:27 | -1839 |
| Yerington | 04:07:45 | -29.0 | Dark | Down | 45.7 | 2.3 | Up | 04:04:03 - 04:11:26 | -1887 |
| Lee Vining | 04:07:49 | -29.4 | Dark | Down | 44.7 | 2.2 | Up | 04:04:07 - 04:11:30 | -1912 |
| Hawthorne | 04:07:46 | -29.6 | Dark | Down | 45.3 | 2.2 | Up | 04:04:05 - 04:11:28 | -1942 |
| Bishop | 04:07:50 | -30.2 | Dark | Down | 44.1 | 2.1 | Up | 04:04:09 - 04:11:32 | -1986 |
| Wildwood | 04:08:03 | -31.2 | Dark | Down | 40.8 | 2.0 | Up | 04:04:22 - 04:11:45 | -2034 |
| Tonopah | 04:07:46 | -30.8 | Dark | Down | 44.8 | 1.9 | Up | 04:04:05 - 04:11:28 | -2072 |
| Beatty | 04:07:50 | -31.6 | Dark | Down | 43.7 | 1.8 | Up | 04:04:09 - 04:11:32 | -2136 |
| Idyllwild | 04:08:02 | -32.8 | Dark | Down | 40.5 | 1.7 | Up | 04:04:21 - 04:11:44 | -2210 |
| Indian Springs | 04:07:50 | -32.5 | Dark | Down | 43.4 | 1.6 | Up | 04:04:08 - 04:11:31 | -2237 |
| Henderson | 04:07:51 | -33.2 | Dark | Down | 42.9 | 1.5 | Up | 04:04:09 - 04:11:32 | -2309 |
| Calipatria | 04:08:02 | -33.9 | Dark | Down | 39.9 | 1.5 | Up | 04:04:21 - 04:11:44 | -2329 |
| Laughlin/Bullhead City | 04:07:54 | -33.9 | Dark | Down | 42.0 | 1.4 | Up | 04:04:12 - 04:11:35 | -2365 |
| Mohave Valley | 04:07:55 | -34.0 | Dark | Down | 41.7 | 1.4 | Up | 04:04:13 - 04:11:36 | -2372 |
| Blythe | 04:07:59 | -34.5 | Dark | Down | 40.5 | 1.4 | Up | 04:04:18 - 04:11:41 | -2401 |
| Lake Havasu City | 04:07:56 | -34.3 | Dark | Down | 41.3 | 1.4 | Up | 04:04:14 - 04:11:37 | -2404 |
| Kingman/Dolan Springs | 04:07:53 | -34.2 | Dark | Down | 42.0 | 1.3 | Up | 04:04:11 - 04:11:34 | -2410 |
| Parker | 04:07:57 | -34.5 | Dark | Down | 41.0 | 1.4 | Up | 04:04:15 - 04:11:38 | -2415 |
| Yuma | 04:08:03 | -34.8 | Dark | Down | 39.5 | 1.4 | Up | 04:04:21 - 04:11:44 | -2419 |
| Patrick | 04:07:52 | -34.3 | Dark | Down | 42.3 | 1.3 | Up | 04:04:10 - 04:11:33 | -2421 |
| George/Scottsdale | 04:07:55 | -36.5 | Dark | Down | 40.6 | 1.0 | Up | 04:04:13 - 04:11:36 | -2638 |
| Dunrhomin | 04:07:18 | -37.9 | Dark | Down | 47.2 | 359.9 | Up | 04:03:37 - 04:11:00 | -2978 |
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, (2021/10/01 04:04UT) Object RA Dec mag sep mel PPM 000431 02:31:53.0 +89:15:50 2.0 6.73 66 PPM 004017 22:47:29.3 +83:09:15 6.0 1.86 71 PPM 003880 21:58:16.7 +82:52:17 8.3 0.44 72 PPM 003805 21:36:57.7 +82:55:16 9.2 0.30 73 PPM 003857 21:51:14.2 +83:11:32 10.9 0.21 72 517717 21:45:18.4 +83:04:15 16.4 72 Positions are for J2000
Event circumstances last updated at 2021/09/02 01:50:26 UT
Marc W. Buie, Southwest Research Institute