Event between (471325) 11KT19 and star GA1020:03941521 with event index number of 1071762
Geocentric closest approach at 2021/05/26 07:46:53 UTC
J2000 position of star is 15:46:02.6 +12:05:21
Equinox of date position of star is 15:46:57.7 +12:01:47
Stellar brightness G=13.3,
use SENSEUP=32
Star is 33 degrees from the moon.
Moon is 100% illuminated.
TNO apparent brightness V=21.8
[RECON map]
TNO is 28.4 AU from the Sun
and 27.6 AU from the Earth.
The TNO is moving 31.0
km/sec on the sky relative to the star, or,
5.6 arcsec/hr.
The 1-sigma error in the time of the event is 84 seconds.
The 1-sigma cross-track error in the shadow position is
5360 km.
The sky-plane scale is
20015.5 km/arcsec.
The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 7.1 sec chord
Diameter=89.3 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is CENTAURR
Star training set for 471325, (2021/05/26 07:47UT) Object RA Dec mag sep mel Arcturus 14:16:38.4 +19:04:22 0.0 22.86 48 Unukalhai 15:45:19.4 +06:21:35 2.6 5.68 27 20Chi Ser 15:42:48.0 +12:46:49 5.3 1.29 33 PPM 131696 15:48:05.1 +11:27:47 7.8 0.61 32 PPM 131663 15:46:22.3 +11:58:58 9.4 0.17 33 PPM 131666 15:46:47.9 +12:01:45 10.2 0.06 33 471325 15:47:03.3 +12:01:25 13.3 32 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 19.7 km
RECON observability=1.0 and success probability=7.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 07:47:21 | -18.9 | Dark | Up | 52.0 | 188.0 | Up | 07:39:53 - 07:54:49 | -1004 |
| Summerland | 07:47:21 | -19.2 | Dark | Up | 52.3 | 187.6 | Up | 07:39:53 - 07:54:49 | -1034 |
| Penticton | 07:47:21 | -19.3 | Dark | Up | 52.3 | 187.8 | Up | 07:39:53 - 07:54:49 | -1037 |
| Okanagan Falls | 07:47:21 | -19.5 | Dark | Up | 52.5 | 187.8 | Up | 07:39:53 - 07:54:49 | -1053 |
| Oliver | 07:47:21 | -19.6 | Dark | Up | 52.7 | 187.9 | Up | 07:39:53 - 07:54:49 | -1066 |
| Anarchist Mountain Observatory | 07:47:20 | -19.8 | Dark | Up | 52.8 | 188.2 | Up | 07:39:52 - 07:54:48 | -1076 |
| Oroville | 07:47:20 | -19.9 | Dark | Up | 52.9 | 188.1 | Up | 07:39:52 - 07:54:48 | -1084 |
| Tonasket | 07:47:20 | -20.1 | Dark | Up | 53.2 | 188.2 | Up | 07:39:52 - 07:54:48 | -1103 |
| Okanogan | 07:47:20 | -20.4 | Dark | Up | 53.5 | 188.0 | Up | 07:39:52 - 07:54:48 | -1134 |
| Brewster | 07:47:20 | -20.7 | Dark | Up | 53.8 | 187.7 | Up | 07:39:52 - 07:54:48 | -1162 |
| Manson/Chelan | 07:47:21 | -20.9 | Dark | Up | 54.0 | 187.1 | Up | 07:39:53 - 07:54:49 | -1188 |
| Entiat | 07:47:20 | -21.1 | Dark | Up | 54.3 | 187.0 | Up | 07:39:52 - 07:54:48 | -1208 |
| Wenatchee | 07:47:21 | -21.4 | Dark | Up | 54.5 | 186.9 | Up | 07:39:53 - 07:54:49 | -1232 |
| Ellensburg | 07:47:21 | -21.8 | Dark | Up | 54.9 | 186.6 | Up | 07:39:53 - 07:54:49 | -1273 |
| Pasco | 07:47:16 | -22.6 | Dark | Up | 55.5 | 189.2 | Up | 07:39:48 - 07:54:44 | -1301 |
| Yakima | 07:47:20 | -22.2 | Dark | Up | 55.3 | 186.7 | Up | 07:39:52 - 07:54:48 | -1308 |
| PNWRO | 07:47:16 | -22.8 | Dark | Up | 55.8 | 189.6 | Up | 07:39:48 - 07:54:44 | -1316 |
| Toppenish/White Swan | 07:47:20 | -22.4 | Dark | Up | 55.5 | 187.0 | Up | 07:39:52 - 07:54:48 | -1322 |
| George/Umatilla | 07:47:17 | -22.9 | Dark | Up | 55.9 | 188.9 | Up | 07:39:49 - 07:54:45 | -1335 |
| Goldendale | 07:47:20 | -22.9 | Dark | Up | 56.1 | 186.3 | Up | 07:39:52 - 07:54:48 | -1380 |
| The Dalles | 07:47:21 | -23.1 | Dark | Up | 56.4 | 185.7 | Up | 07:39:53 - 07:54:49 | -1409 |
| Niwot | 07:46:35 | -27.7 | Dark | Up | 57.3 | 216.3 | Up | 07:39:07 - 07:54:03 | -1437 |
| Maupin | 07:47:20 | -23.6 | Dark | Up | 56.8 | 186.0 | Up | 07:39:52 - 07:54:48 | -1442 |
| SwRI | 07:46:35 | -27.8 | Dark | Up | 57.5 | 216.2 | Up | 07:39:07 - 07:54:03 | -1449 |
| Madras/Culver | 07:47:19 | -24.1 | Dark | Up | 57.3 | 186.0 | Up | 07:39:51 - 07:54:47 | -1491 |
| Redmond | 07:47:19 | -24.5 | Dark | Up | 57.7 | 186.0 | Up | 07:39:51 - 07:54:47 | -1524 |
| Sisters | 07:47:20 | -24.4 | Dark | Up | 57.7 | 185.2 | Up | 07:39:52 - 07:54:48 | -1532 |
| Bend | 07:47:19 | -24.7 | Dark | Up | 57.9 | 185.7 | Up | 07:39:51 - 07:54:47 | -1547 |
| Oregon Observatory | 07:47:19 | -24.8 | Dark | Up | 58.1 | 185.5 | Up | 07:39:51 - 07:54:47 | -1565 |
| La Pine/Gilchrist | 07:47:20 | -25.0 | Dark | Up | 58.3 | 185.4 | Up | 07:39:52 - 07:54:48 | -1585 |
| North Lake | 07:47:17 | -25.5 | Dark | Up | 58.7 | 186.6 | Up | 07:39:49 - 07:54:45 | -1608 |
| Paisley | 07:47:16 | -26.1 | Dark | Up | 59.2 | 187.4 | Up | 07:39:48 - 07:54:44 | -1648 |
| Lakeview | 07:47:15 | -26.6 | Dark | Up | 59.7 | 187.9 | Up | 07:39:47 - 07:54:43 | -1688 |
| Chiloquin | 07:47:19 | -26.1 | Dark | Up | 59.4 | 184.9 | Up | 07:39:51 - 07:54:47 | -1694 |
| Klamath Falls | 07:47:19 | -26.5 | Dark | Up | 59.8 | 185.1 | Up | 07:39:51 - 07:54:47 | -1722 |
| Tulelake | 07:47:18 | -26.8 | Dark | Up | 60.0 | 185.8 | Up | 07:39:50 - 07:54:46 | -1739 |
| Cedarville | 07:47:14 | -27.2 | Dark | Up | 60.3 | 188.4 | Up | 07:39:46 - 07:54:42 | -1743 |
| Fall River/Burney | 07:47:16 | -27.7 | Dark | Up | 60.9 | 186.1 | Up | 07:39:48 - 07:54:44 | -1819 |
| Susanville | 07:47:14 | -28.3 | Dark | Up | 61.5 | 187.7 | Up | 07:39:46 - 07:54:42 | -1857 |
| Gimple | 07:47:14 | -28.6 | Dark | Up | 61.8 | 187.3 | Up | 07:39:46 - 07:54:42 | -1888 |
| Greenville | 07:47:14 | -28.6 | Dark | Up | 61.8 | 187.2 | Up | 07:39:46 - 07:54:42 | -1890 |
| Portola | 07:47:13 | -28.9 | Dark | Up | 62.1 | 188.2 | Up | 07:39:45 - 07:54:41 | -1907 |
| Quincy | 07:47:14 | -28.8 | Dark | Up | 62.0 | 187.2 | Up | 07:39:46 - 07:54:42 | -1909 |
| Reno | 07:47:10 | -29.2 | Dark | Up | 62.2 | 189.6 | Up | 07:39:42 - 07:54:38 | -1914 |
| Carson City | 07:47:10 | -29.6 | Dark | Up | 62.6 | 189.8 | Up | 07:39:42 - 07:54:38 | -1946 |
| Yerington | 07:47:09 | -29.8 | Dark | Up | 62.7 | 191.2 | Up | 07:39:41 - 07:54:37 | -1947 |
| Gardnerville | 07:47:10 | -29.8 | Dark | Up | 62.8 | 190.0 | Up | 07:39:42 - 07:54:38 | -1968 |
| Hawthorne | 07:47:07 | -30.3 | Dark | Up | 63.1 | 192.5 | Up | 07:39:39 - 07:54:35 | -1975 |
| Tonopah | 07:47:02 | -30.8 | Dark | Up | 63.3 | 195.7 | Up | 07:39:34 - 07:54:30 | -1977 |
| Lee Vining | 07:47:07 | -30.8 | Dark | Up | 63.7 | 191.7 | Up | 07:39:39 - 07:54:35 | -2041 |
| Indian Springs | 07:46:57 | -32.2 | Dark | Up | 64.3 | 199.8 | Up | 07:39:29 - 07:54:25 | -2070 |
| Beatty | 07:47:00 | -31.9 | Dark | Up | 64.3 | 197.3 | Up | 07:39:32 - 07:54:28 | -2071 |
| Bishop | 07:47:04 | -31.4 | Dark | Up | 64.2 | 193.5 | Up | 07:39:36 - 07:54:32 | -2076 |
| Henderson | 07:46:54 | -32.7 | Dark | Up | 64.6 | 201.7 | Up | 07:39:26 - 07:54:22 | -2098 |
| Patrick | 07:46:50 | -33.3 | Dark | Up | 64.8 | 204.6 | Up | 07:39:22 - 07:54:18 | -2123 |
| DCO | 07:46:47 | -33.6 | Dark | Up | 64.9 | 206.4 | Up | 07:39:19 - 07:54:15 | -2130 |
| Lone Pine | 07:47:02 | -32.2 | Dark | Up | 64.8 | 194.6 | Up | 07:39:34 - 07:54:30 | -2137 |
| Kingman/Dolan Springs | 07:46:50 | -33.5 | Dark | Up | 65.1 | 204.4 | Up | 07:39:22 - 07:54:18 | -2149 |
| Searchlight/Boulder City | 07:46:53 | -33.3 | Dark | Up | 65.1 | 202.3 | Up | 07:39:25 - 07:54:21 | -2150 |
| Laughlin/Bullhead City | 07:46:51 | -33.6 | Dark | Up | 65.3 | 203.3 | Up | 07:39:23 - 07:54:19 | -2167 |
| Mohave Valley | 07:46:51 | -33.9 | Dark | Up | 65.5 | 203.6 | Up | 07:39:23 - 07:54:19 | -2193 |
| Lake Havasu City | 07:46:50 | -34.2 | Dark | Up | 65.8 | 204.5 | Up | 07:39:22 - 07:54:18 | -2223 |
| Parker | 07:46:49 | -34.6 | Dark | Up | 66.1 | 204.8 | Up | 07:39:21 - 07:54:17 | -2255 |
| Blythe | 07:46:49 | -35.1 | Dark | Up | 66.7 | 204.7 | Up | 07:39:21 - 07:54:17 | -2314 |
| CPSLO | 07:47:09 | -33.4 | Dark | Up | 66.5 | 189.2 | Up | 07:39:41 - 07:54:37 | -2336 |
| Idyllwild | 07:46:56 | -35.1 | Dark | Up | 67.3 | 199.6 | Up | 07:39:28 - 07:54:24 | -2369 |
| Calipatria | 07:46:51 | -35.7 | Dark | Up | 67.5 | 203.0 | Up | 07:39:23 - 07:54:19 | -2390 |
| Wildwood | 07:47:01 | -34.7 | Dark | Up | 67.4 | 194.8 | Up | 07:39:33 - 07:54:29 | -2391 |
| Yuma | 07:46:49 | -36.1 | Dark | Up | 67.6 | 205.5 | Up | 07:39:21 - 07:54:17 | -2403 |
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 471325, (2021/05/26 07:47UT) Object RA Dec mag sep mel Arcturus 14:15:38.2 +19:10:18 0.0 22.86 48 Unukalhai 15:44:16.3 +06:25:33 2.6 5.68 27 20Chi Ser 15:41:47.5 +12:50:52 5.3 1.29 33 PPM 131696 15:47:04.2 +11:31:41 7.8 0.61 32 PPM 131663 15:45:21.6 +12:02:55 9.4 0.17 33 PPM 131666 15:45:47.2 +12:05:41 10.2 0.06 33 471325 15:46:02.6 +12:05:21 13.3 33 Positions are for J2000
Event circumstances last updated at 2019/06/08 01:35:08 UT
Marc W. Buie, Southwest Research Institute