Event between (47171) Lempo and star GA1040:00401765 with event index number of 1628229
Geocentric closest approach at 2026/11/07 07:19:50 UTC
J2000 position of star is 03:54:40.3 +14:50:43
Equinox of date position of star is 03:55:50.1 +14:54:17
Stellar brightness G=11.3,
use SENSEUP=8
Star is 141 degrees from the moon.
Moon is 4% illuminated.
TNO apparent brightness V=24.9
[RECON map]
TNO is 31.2 AU from the Sun
and 30.2 AU from the Earth.
The TNO is moving 23.3
km/sec on the sky relative to the star, or,
3.8 arcsec/hr.
The 1-sigma error in the time of the event is 124 seconds.
The 1-sigma cross-track error in the shadow position is
1593 km.
The sky-plane scale is
21919.7 km/arcsec.
The TNO has an absolute magnitude Hv=10.0
Diameter=660.7 km assuming a 5% albedo -- 2.6 sec chord
Diameter=269.7 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is 3:2E
Star training set for 47171, (2026/11/07 07:20UT) Object RA Dec mag sep mel Aldebaran 04:37:27.9 +16:33:41 0.8 10.07 131 Menkar 03:03:41.2 +04:11:37 2.5 16.79 152 PPM 119411 03:52:45.5 +13:07:31 6.2 1.98 142 PPM 119503 04:00:06.2 +15:09:40 8.4 0.98 140 PPM 119446 03:55:34.2 +15:13:09 8.7 0.33 141 PPM 119448 03:55:48.8 +14:43:43 11.9 0.21 141 47171 03:56:11.0 +14:55:21 11.3 141 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 22.9 km
RECON observability=1.0 and success probability=2.3%
| 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 | 07:20:22 | -55.8 | Dark | Down | 50.6 | 146.3 | Up | 07:09:32 - 07:31:13 | 6049 |
| Kelowna | 07:20:23 | -56.2 | Dark | Down | 50.9 | 145.8 | Up | 07:09:32 - 07:31:13 | 6021 |
| Peachland | 07:20:24 | -56.3 | Dark | Down | 50.8 | 145.3 | Up | 07:09:33 - 07:31:14 | 6018 |
| Summerland | 07:20:24 | -56.4 | Dark | Down | 51.0 | 145.4 | Up | 07:09:34 - 07:31:15 | 6004 |
| Penticton | 07:20:24 | -56.5 | Dark | Down | 51.1 | 145.5 | Up | 07:09:33 - 07:31:14 | 5996 |
| Victoria | 07:20:36 | -56.9 | Dark | Down | 50.4 | 139.4 | Up | 07:09:45 - 07:31:26 | 5995 |
| Oliver | 07:20:24 | -56.8 | Dark | Down | 51.4 | 145.2 | Up | 07:09:34 - 07:31:15 | 5967 |
| Anarchist Mountain Observatory | 07:20:24 | -57.0 | Dark | Down | 51.6 | 145.4 | Up | 07:09:33 - 07:31:14 | 5950 |
| Tonasket | 07:20:25 | -57.3 | Dark | Down | 51.8 | 145.1 | Up | 07:09:34 - 07:31:15 | 5925 |
| Okanogan | 07:20:27 | -57.6 | Dark | Down | 52.0 | 144.6 | Up | 07:09:36 - 07:31:17 | 5900 |
| Brewster | 07:20:27 | -57.9 | Dark | Down | 52.2 | 144.1 | Up | 07:09:37 - 07:31:18 | 5882 |
| Manson/Chelan | 07:20:28 | -58.0 | Dark | Down | 52.2 | 143.4 | Up | 07:09:38 - 07:31:19 | 5873 |
| Entiat | 07:20:30 | -58.2 | Dark | Down | 52.4 | 143.2 | Up | 07:09:39 - 07:31:20 | 5856 |
| Wenatchee | 07:20:30 | -58.5 | Dark | Down | 52.5 | 142.8 | Up | 07:09:40 - 07:31:21 | 5836 |
| Ellensburg | 07:20:32 | -58.9 | Dark | Down | 52.8 | 142.2 | Up | 07:09:42 - 07:31:23 | 5807 |
| Yakima | 07:20:32 | -59.3 | Dark | Down | 53.1 | 141.8 | Up | 07:09:42 - 07:31:23 | 5773 |
| Toppenish/White Swan | 07:20:32 | -59.5 | Dark | Down | 53.3 | 141.9 | Up | 07:09:42 - 07:31:23 | 5750 |
| Goldendale | 07:20:36 | -60.0 | Dark | Down | 53.6 | 140.8 | Up | 07:09:45 - 07:31:26 | 5713 |
| Pasco | 07:20:30 | -59.8 | Dark | Down | 53.9 | 143.7 | Up | 07:09:39 - 07:31:20 | 5712 |
| The Dalles | 07:20:37 | -60.1 | Dark | Down | 53.6 | 140.1 | Up | 07:09:47 - 07:31:28 | 5702 |
| PNWRO | 07:20:29 | -60.0 | Dark | Down | 54.2 | 143.8 | Up | 07:09:38 - 07:31:19 | 5686 |
| Maupin | 07:20:37 | -60.6 | Dark | Down | 54.0 | 139.9 | Up | 07:09:46 - 07:31:27 | 5663 |
| Sisters | 07:20:40 | -61.3 | Dark | Down | 54.4 | 138.4 | Up | 07:09:50 - 07:31:31 | 5599 |
| Redmond | 07:20:40 | -61.4 | Dark | Down | 54.6 | 139.0 | Up | 07:09:50 - 07:31:31 | 5588 |
| Bend | 07:20:40 | -61.6 | Dark | Down | 54.7 | 138.6 | Up | 07:09:50 - 07:31:31 | 5572 |
| Oregon Observatory | 07:20:41 | -61.8 | Dark | Down | 54.8 | 138.2 | Up | 07:09:51 - 07:31:32 | 5560 |
| La Pine/Gilchrist | 07:20:42 | -61.9 | Dark | Down | 54.9 | 137.9 | Up | 07:09:51 - 07:31:32 | 5544 |
| North Lake | 07:20:41 | -62.5 | Dark | Down | 55.5 | 138.4 | Up | 07:09:50 - 07:31:31 | 5492 |
| Paisley | 07:20:40 | -63.1 | Dark | Down | 56.1 | 138.4 | Up | 07:09:50 - 07:31:31 | 5434 |
| Klamath Falls | 07:20:46 | -63.3 | Dark | Down | 55.8 | 136.1 | Up | 07:09:55 - 07:31:36 | 5422 |
| Lakeview | 07:20:41 | -63.6 | Dark | Down | 56.6 | 138.2 | Up | 07:09:51 - 07:31:32 | 5385 |
| Cedarville | 07:20:42 | -64.3 | Dark | Down | 57.1 | 137.8 | Up | 07:09:52 - 07:31:33 | 5321 |
| Fall River/Burney | 07:20:47 | -64.5 | Dark | Down | 56.9 | 135.5 | Up | 07:09:57 - 07:31:38 | 5307 |
| Susanville | 07:20:46 | -65.3 | Dark | Down | 57.7 | 135.9 | Up | 07:09:56 - 07:31:37 | 5232 |
| Greenville | 07:20:48 | -65.5 | Dark | Down | 57.8 | 135.1 | Up | 07:09:57 - 07:31:38 | 5214 |
| Gimple | 07:20:47 | -65.5 | Dark | Down | 57.8 | 135.3 | Up | 07:09:56 - 07:31:37 | 5212 |
| Quincy | 07:20:48 | -65.7 | Dark | Down | 57.9 | 134.9 | Up | 07:09:58 - 07:31:39 | 5195 |
| Portola | 07:20:46 | -65.9 | Dark | Down | 58.3 | 135.5 | Up | 07:09:56 - 07:31:37 | 5172 |
| Reno | 07:20:45 | -66.3 | Dark | Down | 58.8 | 136.2 | Up | 07:09:54 - 07:31:35 | 5132 |
| Carson City | 07:20:46 | -66.6 | Dark | Down | 59.1 | 135.8 | Up | 07:09:56 - 07:31:37 | 5098 |
| Gardnerville | 07:20:46 | -66.9 | Dark | Down | 59.3 | 135.6 | Up | 07:09:55 - 07:31:36 | 5075 |
| Yerington | 07:20:44 | -66.9 | Dark | Down | 59.5 | 136.6 | Up | 07:09:53 - 07:31:34 | 5065 |
| Hawthorne | 07:20:44 | -67.4 | Dark | Down | 60.2 | 136.9 | Up | 07:09:53 - 07:31:34 | 5009 |
| Lee Vining | 07:20:46 | -67.9 | Dark | Down | 60.3 | 135.4 | Up | 07:09:55 - 07:31:36 | 4968 |
| Tonopah | 07:20:39 | -68.1 | Dark | Down | 61.2 | 138.6 | Up | 07:09:48 - 07:31:29 | 4931 |
| Bishop | 07:20:44 | -68.6 | Dark | Down | 61.1 | 135.8 | Up | 07:09:53 - 07:31:34 | 4894 |
| Niwot | 07:19:55 | -65.0 | Dark | Down | 63.9 | 163.7 | Up | 07:09:04 - 07:30:45 | 4860 |
| SwRI | 07:19:55 | -65.1 | Dark | Down | 64.0 | 163.4 | Up | 07:09:05 - 07:30:46 | 4851 |
| Beatty | 07:20:40 | -69.3 | Dark | Down | 62.4 | 138.0 | Up | 07:09:49 - 07:31:30 | 4809 |
| CPSLO | 07:20:56 | -70.2 | Dark | Down | 61.2 | 129.6 | Up | 07:10:06 - 07:31:47 | 4755 |
| Indian Springs | 07:20:37 | -69.7 | Dark | Down | 63.2 | 139.4 | Up | 07:09:46 - 07:31:27 | 4752 |
| Henderson | 07:20:35 | -70.3 | Dark | Down | 63.9 | 140.0 | Up | 07:09:44 - 07:31:25 | 4683 |
| Searchlight/Boulder City | 07:20:36 | -70.8 | Dark | Down | 64.4 | 139.4 | Up | 07:09:46 - 07:31:27 | 4626 |
| Patrick | 07:20:32 | -70.9 | Dark | Down | 65.0 | 141.3 | Up | 07:09:42 - 07:31:23 | 4596 |
| Laughlin/Bullhead City | 07:20:36 | -71.1 | Dark | Down | 64.8 | 139.6 | Up | 07:09:45 - 07:31:26 | 4589 |
| Wildwood | 07:20:51 | -71.8 | Dark | Down | 63.3 | 131.0 | Up | 07:10:01 - 07:31:42 | 4585 |
| Kingman/Dolan Springs | 07:20:33 | -71.1 | Dark | Down | 65.1 | 140.6 | Up | 07:09:42 - 07:31:23 | 4578 |
| Mohave Valley | 07:20:36 | -71.4 | Dark | Down | 65.0 | 139.2 | Up | 07:09:45 - 07:31:26 | 4562 |
| DCO | 07:20:30 | -71.2 | Dark | Down | 65.6 | 142.2 | Up | 07:09:40 - 07:31:21 | 4549 |
| Lake Havasu City | 07:20:35 | -71.8 | Dark | Down | 65.5 | 139.1 | Up | 07:09:45 - 07:31:26 | 4517 |
| Idyllwild | 07:20:45 | -72.4 | Dark | Down | 64.7 | 133.7 | Up | 07:09:55 - 07:31:36 | 4502 |
| Parker | 07:20:36 | -72.2 | Dark | Down | 65.7 | 138.7 | Up | 07:09:46 - 07:31:27 | 4481 |
| Blythe | 07:20:38 | -72.7 | Dark | Down | 66.0 | 137.4 | Up | 07:09:47 - 07:31:28 | 4437 |
| Calipatria | 07:20:42 | -73.1 | Dark | Down | 65.8 | 134.8 | Up | 07:09:51 - 07:31:32 | 4412 |
| George/Scottsdale | 07:20:28 | -72.5 | Dark | Down | 67.3 | 143.0 | Up | 07:09:37 - 07:31:18 | 4380 |
| Yuma | 07:20:40 | -73.6 | Dark | Down | 66.6 | 135.8 | Up | 07:09:49 - 07:31:30 | 4346 |
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 47171, (2026/11/07 07:20UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 10.07 131 Menkar 03:02:16.8 +04:05:21 2.5 16.79 152 PPM 119411 03:51:15.9 +13:02:45 6.2 1.98 142 PPM 119503 03:58:35.2 +15:05:09 8.4 0.98 140 PPM 119446 03:54:03.4 +15:08:29 8.7 0.33 141 PPM 119448 03:54:18.2 +14:39:04 11.9 0.21 141 47171 03:54:40.3 +14:50:43 11.3 141 Positions are for J2000
Event circumstances last updated at 2020/09/03 23:48:49 UT
Marc W. Buie, Southwest Research Institute