Event between (16684) 94JQ1 and star GA0660:07153968 with event index number of 1643497
Geocentric closest approach at 2021/03/31 11:32:15 UTC
J2000 position of star is 16:13:42.2 -23:37:29
Equinox of date position of star is 16:14:58.0 -23:40:37
Stellar brightness G=15.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 18 degrees from the moon.
Moon is 90% illuminated.
TNO apparent brightness V=23.1
[RECON map]
TNO is 42.2 AU from the Sun
and 41.6 AU from the Earth.
The TNO is moving 12.0
km/sec on the sky relative to the star, or,
1.4 arcsec/hr.
The 1-sigma error in the time of the event is 477 seconds.
The 1-sigma cross-track error in the shadow position is
2672 km.
The sky-plane scale is
30182.9 km/arcsec.
The TNO has an absolute magnitude Hv=6.7
Diameter=270.4 km assuming a 5% albedo -- 22.5 sec chord
Diameter=110.4 km assuming a 30% albedo -- 9.2 sec chord
Dynamical classification is CLASSICAL
Star training set for 16684, (2021/03/31 11:32UT) Object RA Dec mag sep mel Antares 16:30:42.8 -26:28:38 0.9 4.53 22 7Del Sco 16:01:35.6 -22:40:50 2.3 3.23 14 PPM 265182 16:10:00.1 -23:44:26 5.9 1.14 17 PPM 265282 16:15:05.0 -24:18:30 8.5 0.63 18 PPM 265264 16:14:11.6 -23:22:57 9.4 0.35 17 16684 16:14:58.7 -23:40:39 15.9 18 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
1.9 sigma about the mid-time.
The median site spacing is 14.6 km
RECON observability=0.7 and success probability=6.8%
| 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 | 11:32:57 | -19.0 | Dark | Up | 16.1 | 179.6 | Really Low | 11:17:57 - 11:47:57 | 850 |
| Kelowna | 11:32:57 | -19.3 | Dark | Up | 16.5 | 179.4 | Really Low | 11:17:57 - 11:47:57 | 837 |
| Peachland | 11:32:59 | -19.6 | Dark | Up | 16.6 | 179.2 | Really Low | 11:17:59 - 11:47:59 | 832 |
| Summerland | 11:32:59 | -19.6 | Dark | Up | 16.8 | 179.2 | Really Low | 11:17:59 - 11:47:59 | 828 |
| Penticton | 11:32:58 | -19.6 | Dark | Up | 16.8 | 179.4 | Really Low | 11:17:58 - 11:47:58 | 826 |
| Oliver | 11:32:58 | -19.8 | Dark | Up | 17.2 | 179.3 | Really Low | 11:17:58 - 11:47:58 | 815 |
| Anarchist Mountain Observatory | 11:32:57 | -19.7 | Dark | Up | 17.4 | 179.5 | Really Low | 11:17:57 - 11:47:57 | 811 |
| Tonasket | 11:32:57 | -19.9 | Dark | Up | 17.7 | 179.5 | Really Low | 11:17:57 - 11:47:57 | 800 |
| Okanogan | 11:32:58 | -20.2 | Dark | Up | 18.0 | 179.3 | Really Low | 11:17:58 - 11:47:58 | 787 |
| Brewster | 11:32:59 | -20.5 | Dark | Up | 18.3 | 179.1 | Really Low | 11:17:59 - 11:47:59 | 777 |
| Victoria | 11:33:21 | -22.2 | Dark | Up | 17.7 | 175.7 | Really Low | 11:18:21 - 11:48:21 | 767 |
| Manson/Chelan | 11:33:01 | -20.8 | Dark | Up | 18.5 | 178.8 | Really Low | 11:18:01 - 11:48:01 | 767 |
| Wenatchee | 11:33:03 | -21.1 | Dark | Up | 19.0 | 178.6 | Really Low | 11:18:03 - 11:48:03 | 749 |
| Ellensburg | 11:33:04 | -21.5 | Dark | Up | 19.4 | 178.4 | Really Low | 11:18:04 - 11:48:04 | 733 |
| Yakima | 11:33:04 | -21.7 | Dark | Up | 19.8 | 178.4 | Really Low | 11:18:04 - 11:48:04 | 718 |
| Pasco | 11:32:55 | -21.1 | Dark | Up | 20.1 | 179.8 | Low | 11:17:55 - 11:47:55 | 713 |
| Toppenish/White Swan | 11:33:03 | -21.7 | Dark | Up | 20.0 | 178.5 | Really Low | 11:18:03 - 11:48:03 | 710 |
| PNWRO | 11:32:53 | -21.1 | Dark | Up | 20.4 | 180.0 | Low | 11:17:53 - 11:47:53 | 705 |
| Goldendale | 11:33:06 | -22.3 | Dark | Up | 20.5 | 178.1 | Low | 11:18:06 - 11:48:06 | 687 |
| The Dalles | 11:33:08 | -22.6 | Dark | Up | 20.7 | 177.8 | Low | 11:18:08 - 11:48:08 | 675 |
| Maupin | 11:33:07 | -22.8 | Dark | Up | 21.2 | 177.9 | Low | 11:18:07 - 11:48:07 | 659 |
| Redmond | 11:33:08 | -23.3 | Dark | Up | 22.1 | 177.8 | Low | 11:18:08 - 11:48:08 | 622 |
| Sisters | 11:33:11 | -23.5 | Dark | Up | 22.0 | 177.4 | Low | 11:18:11 - 11:48:11 | 620 |
| Bend | 11:33:09 | -23.5 | Dark | Up | 22.3 | 177.6 | Low | 11:18:09 - 11:48:09 | 612 |
| Oregon Observatory | 11:33:09 | -23.7 | Dark | Up | 22.5 | 177.5 | Low | 11:18:09 - 11:48:09 | 604 |
| La Pine/Gilchrist | 11:33:10 | -23.8 | Dark | Up | 22.7 | 177.4 | Low | 11:18:10 - 11:48:10 | 595 |
| North Lake | 11:33:06 | -23.7 | Dark | Up | 23.1 | 178.0 | Low | 11:18:06 - 11:48:06 | 580 |
| Paisley | 11:33:04 | -23.8 | Dark | Up | 23.7 | 178.4 | Low | 11:18:04 - 11:48:04 | 558 |
| Lakeview | 11:33:03 | -23.9 | Dark | Up | 24.2 | 178.5 | Low | 11:18:03 - 11:48:03 | 537 |
| Klamath Falls | 11:33:12 | -24.8 | Dark | Up | 24.1 | 177.1 | Low | 11:18:12 - 11:48:12 | 528 |
| Cedarville | 11:33:01 | -24.1 | Dark | Up | 24.8 | 178.7 | Low | 11:18:01 - 11:48:01 | 508 |
| Dunrhomin | 11:31:19 | -14.6 | AT | Up | 24.9 | 193.4 | Low | 11:16:19 - 11:46:19 | 485 |
| Fall River/Burney | 11:33:10 | -25.1 | Dark | Up | 25.3 | 177.5 | Low | 11:18:10 - 11:48:10 | 476 |
| Susanville | 11:33:04 | -25.0 | Dark | Up | 25.9 | 178.2 | Low | 11:18:04 - 11:48:04 | 451 |
| Gimple | 11:33:06 | -25.3 | Dark | Up | 26.2 | 178.0 | Low | 11:18:06 - 11:48:06 | 436 |
| Greenville | 11:33:07 | -25.3 | Dark | Up | 26.2 | 177.9 | Low | 11:18:07 - 11:48:07 | 435 |
| Quincy | 11:33:06 | -25.4 | Dark | Up | 26.4 | 177.9 | Low | 11:18:06 - 11:48:06 | 426 |
| Portola | 11:33:03 | -25.2 | Dark | Up | 26.5 | 178.4 | Low | 11:18:03 - 11:48:03 | 423 |
| Reno | 11:32:58 | -24.9 | Dark | Up | 26.8 | 179.0 | Low | 11:17:58 - 11:47:58 | 414 |
| Carson City | 11:32:58 | -25.1 | Dark | Up | 27.2 | 179.1 | Low | 11:17:58 - 11:47:58 | 396 |
| Yerington | 11:32:54 | -24.7 | Dark | Up | 27.4 | 179.7 | Low | 11:17:54 - 11:47:54 | 390 |
| Gardnerville | 11:32:58 | -25.1 | Dark | Up | 27.4 | 179.1 | Low | 11:17:58 - 11:47:58 | 384 |
| Hawthorne | 11:32:50 | -24.6 | Dark | Up | 27.8 | 180.2 | Low | 11:17:50 - 11:47:50 | 370 |
| Tonopah | 11:32:40 | -23.9 | Dark | Up | 28.3 | 181.7 | Low | 11:17:40 - 11:47:40 | 354 |
| Lee Vining | 11:32:53 | -25.2 | Dark | Up | 28.4 | 179.7 | Low | 11:17:53 - 11:47:53 | 338 |
| Bishop | 11:32:48 | -25.0 | Dark | Up | 29.0 | 180.5 | Low | 11:17:48 - 11:47:48 | 310 |
| Beatty | 11:32:36 | -24.1 | Dark | Up | 29.4 | 182.1 | Low | 11:17:36 - 11:47:36 | 294 |
| Indian Springs | 11:32:28 | -23.4 | Dark | Up | 29.7 | 183.3 | Low | 11:17:28 - 11:47:28 | 281 |
| Henderson | 11:32:23 | -23.2 | Dark | Up | 30.2 | 184.0 | Up | 11:17:23 - 11:47:23 | 255 |
| Patrick | 11:32:14 | -22.6 | Dark | Up | 30.8 | 185.2 | Up | 11:17:14 - 11:47:14 | 224 |
| Kingman/Dolan Springs | 11:32:15 | -22.8 | Dark | Up | 31.0 | 185.0 | Up | 11:17:15 - 11:47:15 | 211 |
| Laughlin/Bullhead City | 11:32:19 | -23.2 | Dark | Up | 31.1 | 184.4 | Up | 11:17:19 - 11:47:19 | 207 |
| Mohave Valley | 11:32:19 | -23.3 | Dark | Up | 31.3 | 184.5 | Up | 11:17:19 - 11:47:19 | 191 |
| CPSLO | 11:33:04 | -27.5 | Dark | Up | 31.0 | 178.1 | Up | 11:18:04 - 11:48:04 | 180 |
| Lake Havasu City | 11:32:17 | -23.3 | Dark | Up | 31.7 | 184.7 | Up | 11:17:17 - 11:47:17 | 169 |
| Parker | 11:32:17 | -23.4 | Dark | Up | 32.1 | 184.8 | Up | 11:17:17 - 11:47:17 | 149 |
| George/Scottsdale | 11:31:58 | -21.8 | Dark | Up | 32.3 | 187.4 | Up | 11:16:58 - 11:46:58 | 131 |
| Wildwood | 11:32:49 | -26.6 | Dark | Up | 32.3 | 180.3 | Up | 11:17:49 - 11:47:49 | 124 |
| Blythe | 11:32:18 | -23.9 | Dark | Up | 32.6 | 184.5 | Up | 11:17:18 - 11:47:18 | 116 |
| Idyllwild | 11:32:34 | -25.4 | Dark | Up | 32.6 | 182.3 | Up | 11:17:34 - 11:47:34 | 115 |
| Calipatria | 11:32:25 | -24.8 | Dark | Up | 33.2 | 183.5 | Up | 11:17:25 - 11:47:25 | 83 |
| Yuma | 11:32:18 | -24.3 | Dark | Up | 33.5 | 184.5 | Up | 11:17:18 - 11:47:18 | 60 |
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 16684, (2021/03/31 11:32UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 4.53 22 7Del Sco 16:00:20.0 -22:37:18 2.3 3.23 14 PPM 265182 16:08:43.7 -23:41:08 5.9 1.14 17 PPM 265282 16:13:48.2 -24:15:20 8.5 0.63 18 PPM 265264 16:12:55.3 -23:19:46 9.4 0.35 17 16684 16:13:42.2 -23:37:29 15.9 18 Positions are for J2000
Event circumstances last updated at 2021/01/19 21:41:17 UT
Marc W. Buie, Southwest Research Institute