Event between (82158) 01FP185 and star GA0940:04001607 with event index number of 1056315
Geocentric closest approach at 2021/02/26 12:21:14 UTC
J2000 position of star is 15:05:36.7 +05:16:55
Equinox of date position of star is 15:06:38.1 +05:12:11
Stellar brightness G=14.8,
use SENSEUP=128
Star is 74 degrees from the moon.
Moon is 99% illuminated.
TNO apparent brightness V=25.9
[RECON map]
TNO is 38.1 AU from the Sun
and 37.7 AU from the Earth.
The TNO is moving 14.2
km/sec on the sky relative to the star, or,
1.9 arcsec/hr.
The 1-sigma error in the time of the event is 98 seconds.
The 1-sigma cross-track error in the shadow position is
2728 km.
The sky-plane scale is
27355.2 km/arcsec.
The TNO has an absolute magnitude Hv=10.0
Diameter=346.7 km assuming a 5% albedo -- 4.2 sec chord
Diameter=141.6 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is SCATNEAR
Star training set for 82158, (2021/02/26 12:21UT) Object RA Dec mag sep mel Arcturus 14:16:37.7 +19:04:24 0.0 18.47 59 Unukalhai 15:45:18.7 +06:21:37 2.6 9.68 83 PPM 161289 15:08:43.4 +05:25:04 6.2 0.56 75 PPM 161263 15:07:21.2 +05:28:09 7.7 0.32 75 PPM 161248 15:06:48.4 +05:06:43 10.3 0.10 74 82158 15:06:39.8 +05:12:03 14.8 75 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 6.1 km
RECON observability=1.0 and success probability=1.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Niwot | 12:25:21 | -14.7 | AT | Up | 53.7 | 199.3 | Up | 12:16:39 - 12:34:03 | -5730 |
| SwRI | 12:25:19 | -14.7 | AT | Up | 53.8 | 199.2 | Up | 12:16:37 - 12:34:01 | -5739 |
| George/Scottsdale | 12:24:48 | -20.4 | Dark | Up | 61.3 | 189.4 | Up | 12:16:06 - 12:33:30 | -6389 |
| DCO | 12:25:01 | -21.3 | Dark | Up | 60.0 | 186.5 | Up | 12:16:19 - 12:33:43 | -6479 |
| Patrick | 12:25:04 | -21.8 | Dark | Up | 59.8 | 185.1 | Up | 12:16:22 - 12:33:46 | -6536 |
| Kingman/Dolan Springs | 12:25:03 | -22.0 | Dark | Up | 60.0 | 184.8 | Up | 12:16:21 - 12:33:45 | -6558 |
| Lake Havasu City | 12:24:55 | -22.3 | Dark | Up | 60.7 | 184.2 | Up | 12:16:13 - 12:33:37 | -6595 |
| Parker | 12:24:55 | -22.3 | Dark | Up | 61.1 | 184.3 | Up | 12:16:13 - 12:33:37 | -6600 |
| Laughlin/Bullhead City | 12:25:05 | -22.4 | Dark | Up | 60.1 | 183.7 | Up | 12:16:23 - 12:33:47 | -6604 |
| Mohave Valley | 12:25:00 | -22.5 | Dark | Up | 60.3 | 183.7 | Up | 12:16:18 - 12:33:42 | -6609 |
| Henderson | 12:25:09 | -22.7 | Dark | Up | 59.2 | 182.9 | Up | 12:16:27 - 12:33:51 | -6623 |
| Searchlight/Boulder City | 12:25:03 | -22.7 | Dark | Up | 59.8 | 183.0 | Up | 12:16:21 - 12:33:45 | -6629 |
| Blythe | 12:24:53 | -22.6 | Dark | Up | 61.6 | 183.8 | Up | 12:16:11 - 12:33:35 | -6638 |
| Yuma | 12:24:47 | -22.8 | Dark | Up | 62.5 | 183.8 | Up | 12:16:05 - 12:33:29 | -6661 |
| Clarence Fulton | 12:26:36 | -22.9 | Dark | Up | 45.0 | 176.5 | Up | 12:17:54 - 12:35:18 | -6666 |
| Indian Springs | 12:25:12 | -23.2 | Dark | Up | 58.7 | 181.5 | Up | 12:16:30 - 12:33:54 | -6672 |
| Kelowna | 12:26:34 | -23.1 | Dark | Up | 45.4 | 176.2 | Up | 12:17:52 - 12:35:16 | -6685 |
| Anarchist Mountain Observatory | 12:26:29 | -23.3 | Dark | Up | 46.2 | 176.3 | Up | 12:17:47 - 12:35:11 | -6697 |
| Penticton | 12:26:32 | -23.3 | Dark | Up | 45.7 | 176.1 | Up | 12:17:50 - 12:35:14 | -6699 |
| Summerland | 12:26:33 | -23.3 | Dark | Up | 45.6 | 175.9 | Up | 12:17:51 - 12:35:15 | -6705 |
| Oliver | 12:26:30 | -23.4 | Dark | Up | 46.0 | 176.0 | Up | 12:17:48 - 12:35:12 | -6707 |
| Peachland | 12:26:33 | -23.4 | Dark | Up | 45.5 | 175.8 | Up | 12:17:51 - 12:35:15 | -6709 |
| Tonasket | 12:26:28 | -23.4 | Dark | Up | 46.5 | 176.2 | Up | 12:17:46 - 12:35:10 | -6709 |
| Okanogan | 12:26:26 | -23.6 | Dark | Up | 46.9 | 175.9 | Up | 12:17:44 - 12:35:08 | -6727 |
| PNWRO | 12:26:12 | -23.8 | Dark | Up | 49.2 | 176.7 | Up | 12:17:30 - 12:34:54 | -6729 |
| Calipatria | 12:24:47 | -23.5 | Dark | Up | 62.1 | 181.8 | Up | 12:16:05 - 12:33:29 | -6733 |
| Pasco | 12:26:14 | -23.8 | Dark | Up | 49.0 | 176.4 | Up | 12:17:32 - 12:34:56 | -6741 |
| Brewster | 12:26:25 | -23.8 | Dark | Up | 47.1 | 175.6 | Up | 12:17:43 - 12:35:07 | -6748 |
| Beatty | 12:25:19 | -24.0 | Dark | Up | 58.4 | 179.5 | Up | 12:16:37 - 12:34:01 | -6759 |
| Tonopah | 12:25:24 | -24.1 | Dark | Up | 57.2 | 178.7 | Up | 12:16:42 - 12:34:06 | -6772 |
| Manson/Chelan | 12:26:24 | -24.1 | Dark | Up | 47.3 | 175.0 | Up | 12:17:42 - 12:35:06 | -6780 |
| Entiat | 12:26:23 | -24.2 | Dark | Up | 47.5 | 174.9 | Up | 12:17:41 - 12:35:05 | -6790 |
| Wenatchee | 12:26:25 | -24.3 | Dark | Up | 47.8 | 174.7 | Up | 12:17:43 - 12:35:07 | -6803 |
| Idyllwild | 12:24:56 | -24.4 | Dark | Up | 61.5 | 179.4 | Up | 12:16:14 - 12:33:38 | -6827 |
| Ellensburg | 12:26:24 | -24.6 | Dark | Up | 48.2 | 174.4 | Up | 12:17:42 - 12:35:06 | -6830 |
| Toppenish/White Swan | 12:26:16 | -24.7 | Dark | Up | 48.8 | 174.5 | Up | 12:17:34 - 12:34:58 | -6833 |
| Yakima | 12:26:18 | -24.7 | Dark | Up | 48.6 | 174.3 | Up | 12:17:36 - 12:35:00 | -6841 |
| Goldendale | 12:26:13 | -25.1 | Dark | Up | 49.3 | 173.7 | Up | 12:17:31 - 12:34:55 | -6879 |
| Hawthorne | 12:25:27 | -25.2 | Dark | Up | 56.7 | 176.2 | Up | 12:16:45 - 12:34:09 | -6882 |
| Bishop | 12:25:23 | -25.2 | Dark | Up | 57.9 | 176.5 | Up | 12:16:41 - 12:34:05 | -6890 |
| The Dalles | 12:26:13 | -25.4 | Dark | Up | 49.5 | 173.1 | Up | 12:17:31 - 12:34:55 | -6912 |
| Maupin | 12:26:10 | -25.4 | Dark | Up | 49.9 | 173.2 | Up | 12:17:28 - 12:34:52 | -6915 |
| Yerington | 12:25:33 | -25.5 | Dark | Up | 56.2 | 175.3 | Up | 12:16:51 - 12:34:15 | -6915 |
| Lakeview | 12:25:52 | -25.7 | Dark | Up | 52.9 | 173.9 | Up | 12:17:10 - 12:34:34 | -6934 |
| Cedarville | 12:25:49 | -25.7 | Dark | Up | 53.6 | 174.0 | Up | 12:17:07 - 12:34:31 | -6936 |
| Paisley | 12:25:55 | -25.7 | Dark | Up | 52.4 | 173.6 | Up | 12:17:13 - 12:34:37 | -6936 |
| Lee Vining | 12:25:28 | -25.6 | Dark | Up | 57.2 | 175.2 | Up | 12:16:46 - 12:34:10 | -6937 |
| Redmond | 12:26:05 | -25.7 | Dark | Up | 50.8 | 172.9 | Up | 12:17:23 - 12:34:47 | -6945 |
| North Lake | 12:25:59 | -25.8 | Dark | Up | 51.9 | 173.2 | Up | 12:17:17 - 12:34:41 | -6950 |
| Reno | 12:25:37 | -25.8 | Dark | Up | 55.6 | 174.3 | Up | 12:16:55 - 12:34:19 | -6957 |
| Bend | 12:26:08 | -25.9 | Dark | Up | 51.0 | 172.7 | Up | 12:17:26 - 12:34:50 | -6962 |
| Carson City | 12:25:36 | -25.9 | Dark | Up | 56.0 | 174.3 | Up | 12:16:54 - 12:34:18 | -6964 |
| Gardnerville | 12:25:35 | -25.9 | Dark | Up | 56.2 | 174.3 | Up | 12:16:53 - 12:34:17 | -6966 |
| Sisters | 12:26:10 | -26.0 | Dark | Up | 50.8 | 172.3 | Up | 12:17:28 - 12:34:52 | -6976 |
| Oregon Observatory | 12:26:03 | -26.0 | Dark | Up | 51.2 | 172.4 | Up | 12:17:21 - 12:34:45 | -6976 |
| La Pine/Gilchrist | 12:26:02 | -26.1 | Dark | Up | 51.4 | 172.3 | Up | 12:17:20 - 12:34:44 | -6987 |
| Wildwood | 12:25:02 | -25.9 | Dark | Up | 61.1 | 175.5 | Up | 12:16:20 - 12:33:44 | -6988 |
| Victoria | 12:26:31 | -26.0 | Dark | Up | 46.4 | 170.4 | Up | 12:17:49 - 12:35:13 | -6998 |
| Susanville | 12:25:44 | -26.3 | Dark | Up | 54.7 | 173.0 | Up | 12:17:02 - 12:34:26 | -7004 |
| Portola | 12:25:40 | -26.3 | Dark | Up | 55.3 | 173.2 | Up | 12:16:58 - 12:34:22 | -7004 |
| Gimple | 12:25:40 | -26.5 | Dark | Up | 54.9 | 172.6 | Up | 12:16:58 - 12:34:22 | -7028 |
| Greenville | 12:25:40 | -26.6 | Dark | Up | 54.9 | 172.4 | Up | 12:16:58 - 12:34:22 | -7035 |
| Quincy | 12:25:43 | -26.6 | Dark | Up | 55.1 | 172.4 | Up | 12:17:01 - 12:34:25 | -7040 |
| Klamath Falls | 12:25:54 | -26.7 | Dark | Up | 52.8 | 171.5 | Up | 12:17:12 - 12:34:36 | -7047 |
| Fall River/Burney | 12:25:51 | -26.7 | Dark | Up | 54.0 | 171.9 | Up | 12:17:09 - 12:34:33 | -7048 |
| CPSLO | 12:25:15 | -27.3 | Dark | Up | 59.7 | 171.7 | Up | 12:16:33 - 12:33:57 | -7140 |
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 82158, (2021/02/26 12:21UT) Object RA Dec mag sep mel Arcturus 14:15:38.1 +19:10:16 0.0 18.47 59 Unukalhai 15:44:16.3 +06:25:33 2.6 9.68 83 PPM 161289 15:07:40.3 +05:29:53 6.2 0.56 75 PPM 161263 15:06:18.1 +05:33:00 7.7 0.32 75 PPM 161248 15:05:45.2 +05:11:35 10.3 0.10 74 82158 15:05:36.7 +05:16:55 14.8 74 Positions are for J2000
Event circumstances last updated at 2020/07/30 00:29:14 UT
Marc W. Buie, Southwest Research Institute