Event between 99HH12 and star GA0700:05782060 with event index number of 1236488
Geocentric closest approach at 2023/06/21 06:07:55 UTC
J2000 position of star is 15:27:35.4 -19:19:14
Equinox of date position of star is 15:28:55.7 -19:24:01
Stellar brightness G=16.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 110 degrees from the moon.
Moon is 9% illuminated.
Apparent brightness V=23.5
[RECON map]
Object is 43.7 AU from the Sun
and 42.8 AU from the Earth.
Apparent velocity is 19.6
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 863 seconds.
The 1-sigma cross-track error in the shadow position is
5330 km.
The sky-plane scale is
31062.7 km/arcsec.
The object has an absolute magnitude Hv=7.0
Diameter=242.1 km assuming a 5% albedo -- 12.3 sec chord
Diameter=98.8 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CLASSICAL
Star training set for 99HH12, (2023/06/21 06:08UT) Object RA Dec mag sep mel Antares 16:30:51.0 -26:28:55 0.9 15.90 126 7Del Sco 16:01:43.5 -22:41:12 2.3 8.32 119 PPM 230380 15:33:57.8 -19:44:55 5.5 1.23 112 PPM 230293 15:30:03.8 -18:48:12 8.3 0.65 110 PPM 230275 15:28:59.2 -19:14:36 9.6 0.16 110 99HH12 15:28:56.3 -19:24:03 16.6 111 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
1.0 sigma about the mid-time.
The median site spacing is 11.3 km
RECON observability=0.7 and success probability=1.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 06:07:55 | -13.4 | AT | Down | 15.7 | 202.9 | Really Low | 05:52:55 - 06:22:55 | 8584 |
| Kamloops | 06:08:40 | -11.7 | NT | Up | 19.5 | 189.1 | Really Low | 05:53:40 - 06:23:40 | 8385 |
| Kelowna | 06:08:36 | -12.7 | AT | Up | 20.3 | 190.0 | Low | 05:53:36 - 06:23:36 | 8369 |
| Peachland | 06:08:37 | -12.7 | AT | Up | 20.4 | 189.7 | Low | 05:53:37 - 06:23:37 | 8361 |
| Summerland | 06:08:38 | -12.9 | AT | Up | 20.5 | 189.9 | Low | 05:53:38 - 06:23:38 | 8357 |
| Penticton | 06:08:35 | -12.9 | AT | Up | 20.6 | 190.0 | Low | 05:53:35 - 06:23:35 | 8356 |
| Oliver | 06:08:35 | -13.3 | AT | Up | 20.9 | 190.0 | Low | 05:53:35 - 06:23:35 | 8344 |
| Anarchist Mountain Observatory | 06:08:34 | -13.5 | AT | Up | 21.1 | 190.2 | Low | 05:53:34 - 06:23:34 | 8341 |
| Okanogan | 06:08:35 | -14.0 | AT | Up | 21.7 | 190.0 | Low | 05:53:35 - 06:23:35 | 8313 |
| Brewster | 06:08:34 | -14.2 | AT | Up | 22.0 | 189.8 | Low | 05:53:34 - 06:23:34 | 8300 |
| Manson/Chelan | 06:08:37 | -14.2 | AT | Up | 22.3 | 189.5 | Low | 05:53:37 - 06:23:37 | 8287 |
| Wenatchee | 06:08:37 | -14.6 | AT | Up | 22.8 | 189.3 | Low | 05:53:37 - 06:23:37 | 8266 |
| Victoria | 06:08:48 | -12.7 | AT | Up | 21.9 | 186.2 | Low | 05:53:48 - 06:23:48 | 8260 |
| Ellensburg | 06:08:36 | -14.9 | AT | Up | 23.2 | 189.1 | Low | 05:53:36 - 06:23:36 | 8246 |
| PNWRO | 06:08:30 | -16.3 | AT | Up | 24.0 | 190.9 | Low | 05:53:30 - 06:23:30 | 8230 |
| Yakima | 06:08:37 | -15.3 | AT | Up | 23.6 | 189.1 | Low | 05:53:37 - 06:23:37 | 8229 |
| Toppenish/White Swan | 06:08:35 | -15.5 | AT | Up | 23.8 | 189.3 | Low | 05:53:35 - 06:23:35 | 8222 |
| The Dalles | 06:08:38 | -16.0 | AT | Up | 24.7 | 188.6 | Low | 05:53:38 - 06:23:38 | 8177 |
| Maupin | 06:08:36 | -16.4 | AT | Up | 25.1 | 188.7 | Low | 05:53:36 - 06:23:36 | 8161 |
| Dunrhomin | 06:07:27 | -25.0 | Dark | Down | 26.4 | 205.4 | Low | 05:52:27 - 06:22:27 | 8136 |
| Nikitin | 06:07:27 | -25.2 | Dark | Down | 26.5 | 205.4 | Low | 05:52:27 - 06:22:27 | 8127 |
| CU-SBO | 06:07:26 | -25.3 | Dark | Down | 26.6 | 205.3 | Low | 05:52:26 - 06:22:26 | 8123 |
| Sisters | 06:08:38 | -17.0 | AT | Up | 26.0 | 188.3 | Low | 05:53:38 - 06:23:38 | 8114 |
| Bend | 06:08:35 | -17.3 | AT | Up | 26.2 | 188.5 | Low | 05:53:35 - 06:23:35 | 8108 |
| Oregon Observatory | 06:08:36 | -17.4 | AT | Up | 26.4 | 188.4 | Low | 05:53:36 - 06:23:36 | 8098 |
| Chiloquin | 06:08:36 | -18.4 | Dark | Up | 27.7 | 188.1 | Low | 05:53:36 - 06:23:36 | 8029 |
| Klamath Falls | 06:08:36 | -18.7 | Dark | Up | 28.0 | 188.2 | Low | 05:53:36 - 06:23:36 | 8013 |
| Cedarville | 06:08:29 | -19.9 | Dark | Down | 28.6 | 189.9 | Low | 05:53:29 - 06:23:29 | 8006 |
| Fall River/Burney | 06:08:33 | -19.9 | Dark | Up | 29.2 | 188.7 | Low | 05:53:33 - 06:23:33 | 7961 |
| Gimple | 06:08:29 | -20.9 | Dark | Down | 30.0 | 189.3 | Up | 05:53:29 - 06:23:29 | 7924 |
| Greenville | 06:08:31 | -20.8 | Dark | Down | 30.0 | 189.2 | Up | 05:53:31 - 06:23:31 | 7922 |
| Portola | 06:08:27 | -21.3 | Dark | Down | 30.3 | 189.8 | Up | 05:53:27 - 06:23:27 | 7914 |
| Quincy | 06:08:30 | -21.0 | Dark | Down | 30.2 | 189.3 | Up | 05:53:30 - 06:23:30 | 7912 |
| Reno | 06:08:25 | -21.8 | Dark | Down | 30.5 | 190.5 | Up | 05:53:25 - 06:23:25 | 7911 |
| Yerington | 06:08:21 | -22.5 | Dark | Down | 30.9 | 191.3 | Up | 05:53:21 - 06:23:21 | 7892 |
| Carson City | 06:08:24 | -22.1 | Dark | Down | 30.8 | 190.6 | Up | 05:53:24 - 06:23:24 | 7892 |
| Gardnerville | 06:08:23 | -22.3 | Dark | Down | 31.0 | 190.6 | Up | 05:53:23 - 06:23:23 | 7880 |
| Hawthorne | 06:08:19 | -23.1 | Dark | Down | 31.3 | 191.9 | Up | 05:53:19 - 06:23:19 | 7876 |
| Lee Vining | 06:08:18 | -23.4 | Dark | Down | 31.9 | 191.4 | Up | 05:53:18 - 06:23:18 | 7837 |
| Beatty | 06:08:09 | -25.2 | Dark | Down | 32.5 | 194.1 | Up | 05:53:09 - 06:23:09 | 7816 |
| Bishop | 06:08:16 | -24.2 | Dark | Down | 32.4 | 192.3 | Up | 05:53:16 - 06:23:16 | 7816 |
| Patrick | 06:07:53 | -27.5 | Dark | Down | 33.4 | 197.5 | Up | 05:52:53 - 06:22:53 | 7774 |
| Laughlin/Bullhead City | 06:07:55 | -27.5 | Dark | Down | 33.8 | 196.7 | Up | 05:52:55 - 06:22:55 | 7749 |
| Lake Havasu City | 06:07:53 | -28.2 | Dark | Down | 34.3 | 197.1 | Up | 05:52:53 - 06:22:53 | 7713 |
| George/Scottsdale | 06:07:43 | -29.7 | Dark | Down | 34.4 | 200.0 | Up | 05:52:43 - 06:22:43 | 7701 |
| Idyllwild | 06:08:03 | -28.0 | Dark | Down | 35.6 | 194.7 | Up | 05:53:03 - 06:23:03 | 7630 |
| Wildwood | 06:08:11 | -27.0 | Dark | Down | 35.6 | 192.5 | Up | 05:53:11 - 06:23:11 | 7619 |
| Calipatria | 06:07:57 | -29.0 | Dark | Down | 35.9 | 196.1 | Up | 05:52:57 - 06:22:57 | 7610 |
| Yuma | 06:07:53 | -29.7 | Dark | Down | 36.1 | 197.2 | Up | 05:52:53 - 06:22:53 | 7597 |
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 99HH12, (2023/06/21 06:08UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 15.90 126 7Del Sco 16:00:20.0 -22:37:18 2.3 8.32 119 PPM 230380 15:32:36.7 -19:40:14 5.5 1.23 112 PPM 230293 15:28:43.2 -18:43:25 8.3 0.65 110 PPM 230275 15:27:38.4 -19:09:47 9.6 0.16 110 99HH12 15:27:35.4 -19:19:14 16.6 110 Positions are for J2000
Event circumstances last updated at 2023/04/20 03:43:23 UT
Marc W. Buie, Southwest Research Institute