Event between (121725) Aphidas and star GA1020:03462257 with event index number of 1205181
Geocentric closest approach at 2023/03/03 08:58:28 UTC
J2000 position of star is 11:07:08.8 +12:15:08
Equinox of date position of star is 11:08:21.1 +12:07:38
Stellar brightness G=11.9,
use SENSEUP=8 with the MallinCam and and exposure
time of 125 milli-seconds with the QHY174 camera.
Star is 46 degrees from the moon.
Moon is 85% illuminated.
Apparent brightness V=22.7
[RECON map]
Object is 24.5 AU from the Sun
and 23.5 AU from the Earth.
Apparent velocity is 25.5
km/sec on the sky relative to the star, or,
5.4 arcsec/hr.
The 1-sigma error in the time of the event is 71 seconds.
The 1-sigma cross-track error in the shadow position is
1349 km.
The sky-plane scale is
17046.9 km/arcsec.
The object has an absolute magnitude Hv=8.9
Diameter=99.5 km assuming a 5% albedo -- 3.9 sec chord
Diameter=40.6 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
Star training set for 121725, (2023/03/03 08:58UT) Object RA Dec mag sep mel Regulus 10:09:36.2 +11:51:11 1.3 14.37 33 68Del Leo 11:15:20.2 +20:23:47 2.6 8.44 45 73 Leo 11:17:04.5 +13:10:51 6.5 2.37 48 PPM 127961 11:07:02.6 +12:26:22 7.7 0.45 46 PPM 127962 11:07:07.3 +12:16:54 9.0 0.34 46 PPM 127990 11:08:27.2 +12:09:35 11.0 0.04 46 121725 11:08:21.6 +12:07:35 11.9 46 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 17.0 km
RECON observability=1.0 and success probability=27.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 08:58:39 | -40.1 | Dark | Up | 46.1 | 213.2 | Up | 08:52:16 - 09:05:01 | -582 |
| Kamloops | 08:59:09 | -45.2 | Dark | Up | 51.0 | 193.3 | Up | 08:52:47 - 09:05:32 | -1116 |
| Kelowna | 08:59:06 | -45.8 | Dark | Up | 51.6 | 194.9 | Up | 08:52:43 - 09:05:28 | -1150 |
| Peachland | 08:59:06 | -45.9 | Dark | Up | 51.8 | 194.5 | Up | 08:52:43 - 09:05:28 | -1168 |
| Summerland | 08:59:06 | -46.1 | Dark | Up | 51.9 | 194.7 | Up | 08:52:43 - 09:05:28 | -1176 |
| Penticton | 08:59:05 | -46.1 | Dark | Up | 51.9 | 194.9 | Up | 08:52:43 - 09:05:28 | -1177 |
| Oliver | 08:59:05 | -46.4 | Dark | Up | 52.3 | 195.0 | Up | 08:52:42 - 09:05:27 | -1204 |
| Anarchist Mountain Observatory | 08:59:04 | -46.6 | Dark | Up | 52.4 | 195.3 | Up | 08:52:41 - 09:05:26 | -1211 |
| Okanogan | 08:59:04 | -47.2 | Dark | Up | 53.1 | 195.2 | Up | 08:52:41 - 09:05:26 | -1268 |
| Brewster | 08:59:03 | -47.5 | Dark | Up | 53.4 | 195.0 | Up | 08:52:41 - 09:05:26 | -1295 |
| Manson/Chelan | 08:59:04 | -47.8 | Dark | Up | 53.6 | 194.4 | Up | 08:52:41 - 09:05:26 | -1323 |
| Wenatchee | 08:59:03 | -48.3 | Dark | Up | 54.1 | 194.3 | Up | 08:52:41 - 09:05:26 | -1365 |
| Victoria | 08:59:13 | -47.7 | Dark | Up | 53.4 | 189.0 | Up | 08:52:51 - 09:05:36 | -1374 |
| Dunrhomin | 08:58:07 | -49.1 | Dark | Up | 55.2 | 223.0 | Up | 08:51:45 - 09:04:30 | -1392 |
| Ellensburg | 08:59:03 | -48.7 | Dark | Up | 54.6 | 194.1 | Up | 08:52:40 - 09:05:25 | -1405 |
| Nikitin | 08:58:07 | -49.3 | Dark | Up | 55.4 | 223.2 | Up | 08:51:45 - 09:04:30 | -1408 |
| CU-SBO | 08:58:07 | -49.4 | Dark | Up | 55.4 | 223.1 | Up | 08:51:44 - 09:04:29 | -1416 |
| PNWRO | 08:58:57 | -49.3 | Dark | Up | 55.2 | 197.2 | Up | 08:52:34 - 09:05:19 | -1429 |
| Yakima | 08:59:02 | -49.1 | Dark | Up | 55.0 | 194.2 | Up | 08:52:40 - 09:05:25 | -1437 |
| Toppenish/White Swan | 08:59:02 | -49.3 | Dark | Up | 55.1 | 194.6 | Up | 08:52:39 - 09:05:24 | -1449 |
| The Dalles | 08:59:02 | -50.2 | Dark | Up | 56.0 | 193.5 | Up | 08:52:40 - 09:05:25 | -1537 |
| Maupin | 08:59:01 | -50.6 | Dark | Up | 56.4 | 193.8 | Up | 08:52:39 - 09:05:24 | -1568 |
| Sisters | 08:59:01 | -51.5 | Dark | Up | 57.4 | 193.3 | Up | 08:52:39 - 09:05:24 | -1656 |
| Bend | 08:59:00 | -51.7 | Dark | Up | 57.5 | 193.8 | Up | 08:52:37 - 09:05:22 | -1667 |
| Oregon Observatory | 08:59:00 | -51.9 | Dark | Up | 57.7 | 193.6 | Up | 08:52:38 - 09:05:23 | -1685 |
| Chiloquin | 08:58:59 | -53.2 | Dark | Up | 59.1 | 193.4 | Up | 08:52:36 - 09:05:21 | -1810 |
| Klamath Falls | 08:58:58 | -53.6 | Dark | Up | 59.4 | 193.6 | Up | 08:52:35 - 09:05:20 | -1836 |
| Cedarville | 08:58:52 | -53.8 | Dark | Up | 59.8 | 197.0 | Up | 08:52:29 - 09:05:14 | -1838 |
| Fall River/Burney | 08:58:55 | -54.6 | Dark | Up | 60.5 | 194.9 | Up | 08:52:32 - 09:05:17 | -1923 |
| Gimple | 08:58:52 | -55.3 | Dark | Up | 61.2 | 196.3 | Up | 08:52:29 - 09:05:14 | -1982 |
| Greenville | 08:58:52 | -55.4 | Dark | Up | 61.3 | 196.1 | Up | 08:52:29 - 09:05:14 | -1985 |
| Reno | 08:58:47 | -55.6 | Dark | Up | 61.6 | 198.7 | Up | 08:52:25 - 09:05:10 | -1995 |
| Portola | 08:58:50 | -55.5 | Dark | Up | 61.5 | 197.3 | Up | 08:52:28 - 09:05:13 | -1995 |
| Quincy | 08:58:51 | -55.5 | Dark | Up | 61.5 | 196.3 | Up | 08:52:29 - 09:05:14 | -2002 |
| Yerington | 08:58:44 | -55.9 | Dark | Up | 61.9 | 200.3 | Up | 08:52:22 - 09:05:07 | -2019 |
| Carson City | 08:58:47 | -55.9 | Dark | Up | 61.9 | 198.9 | Up | 08:52:24 - 09:05:09 | -2025 |
| Hawthorne | 08:58:42 | -56.2 | Dark | Up | 62.2 | 201.7 | Up | 08:52:19 - 09:05:04 | -2039 |
| Gardnerville | 08:58:46 | -56.2 | Dark | Up | 62.1 | 199.2 | Up | 08:52:24 - 09:05:09 | -2044 |
| Lee Vining | 08:58:42 | -56.9 | Dark | Up | 62.9 | 201.1 | Up | 08:52:20 - 09:05:05 | -2106 |
| Beatty | 08:58:33 | -57.0 | Dark | Up | 63.1 | 206.6 | Up | 08:52:10 - 09:04:55 | -2109 |
| Patrick | 08:58:21 | -57.1 | Dark | Up | 63.2 | 213.7 | Up | 08:51:58 - 09:04:43 | -2126 |
| Bishop | 08:58:39 | -57.2 | Dark | Up | 63.2 | 203.0 | Up | 08:52:17 - 09:05:02 | -2131 |
| Laughlin/Bullhead City | 08:58:23 | -57.7 | Dark | Up | 63.8 | 212.6 | Up | 08:52:00 - 09:04:45 | -2176 |
| George/Scottsdale | 08:58:11 | -57.5 | Dark | Up | 63.6 | 219.5 | Up | 08:51:49 - 09:04:34 | -2194 |
| Lake Havasu City | 08:58:20 | -58.1 | Dark | Up | 64.2 | 213.9 | Up | 08:51:58 - 09:04:43 | -2225 |
| Idyllwild | 08:58:26 | -59.8 | Dark | Up | 65.9 | 209.8 | Up | 08:52:03 - 09:04:48 | -2387 |
| Calipatria | 08:58:22 | -59.8 | Dark | Up | 65.9 | 213.0 | Up | 08:51:59 - 09:04:44 | -2394 |
| Yuma | 08:58:18 | -59.7 | Dark | Up | 65.8 | 215.4 | Up | 08:51:55 - 09:04:40 | -2397 |
| Wildwood | 08:58:33 | -60.2 | Dark | Up | 66.3 | 205.3 | Up | 08:52:11 - 09:04:56 | -2429 |
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 121725, (2023/03/03 08:58UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 14.37 33 68Del Leo 11:14:06.7 +20:31:23 2.6 8.44 45 73 Leo 11:15:51.9 +13:18:27 6.5 2.37 48 PPM 127961 11:05:49.8 +12:33:54 7.7 0.45 46 PPM 127962 11:05:54.5 +12:24:26 9.0 0.34 46 PPM 127990 11:07:14.5 +12:17:08 11.0 0.04 46 121725 11:07:08.8 +12:15:08 11.9 46 Positions are for J2000
Event circumstances last updated at 2023/01/08 03:31:08 UT
Marc W. Buie, Southwest Research Institute