Event between (8405) Asbolus and star GDR2_77.811_40.294 with event index number of 156261
Geocentric closest approach at 2018/10/18 05:47:19 UTC
J2000 position of star is 05:11:14.7 +40:17:39
Equinox of date position of star is 05:12:31.7 +40:18:55
Stellar brightness G=15.8,
use SENSEUP=128
Star is 128 degrees from the moon.
Moon is 64% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 21.8 AU from the Sun
and 21.2 AU from the Earth.
The TNO is moving 14.9
km/sec on the sky relative to the star, or,
3.5 arcsec/hr.
The 1-sigma error in the time of the event is 173 seconds.
The 1-sigma cross-track error in the shadow position is
2037 km.
The sky-plane scale is
15410.5 km/arcsec.
The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 6.1 sec chord
Diameter=37.2 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
Star training set for 8405, (2018/10/18 05:47UT) Object RA Dec mag sep mel Aldebaran 04:37:00.1 +16:32:44 0.8 24.99 119 3Iot Aur 04:58:13.2 +33:11:39 2.7 7.68 125 10Eta Aur 05:07:50.2 +41:15:29 3.2 1.30 127 PPM 047782 05:11:18.3 +40:10:29 8.5 0.28 127 PPM 047786 05:11:34.9 +40:22:38 9.6 0.20 127 8405 05:12:33.3 +40:18:57 15.8 128 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 22.7 km
RECON observability=1.0 and success probability=5.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 05:53:04 | -44.5 | Dark | Up | 33.7 | 65.3 | Up | 05:38:08 - 06:07:59 | -4240 |
| Tonasket | 05:53:05 | -44.6 | Dark | Up | 33.6 | 65.2 | Up | 05:38:09 - 06:08:00 | -4262 |
| Okanogan | 05:53:05 | -44.8 | Dark | Up | 33.4 | 64.9 | Up | 05:38:10 - 06:08:01 | -4287 |
| Brewster | 05:53:07 | -45.0 | Dark | Up | 33.1 | 64.6 | Up | 05:38:11 - 06:08:02 | -4305 |
| Manson/Chelan | 05:53:07 | -45.0 | Dark | Up | 32.8 | 64.3 | Up | 05:38:12 - 06:08:03 | -4310 |
| Entiat | 05:53:09 | -45.1 | Dark | Up | 32.7 | 64.1 | Up | 05:38:13 - 06:08:04 | -4327 |
| Wenatchee | 05:53:09 | -45.2 | Dark | Up | 32.5 | 63.9 | Up | 05:38:14 - 06:08:05 | -4347 |
| Ellensburg | 05:53:11 | -45.5 | Dark | Up | 32.2 | 63.6 | Up | 05:38:16 - 06:08:07 | -4377 |
| Yakima | 05:53:12 | -45.8 | Dark | Up | 32.0 | 63.3 | Up | 05:38:17 - 06:08:08 | -4414 |
| Toppenish/White Swan | 05:53:13 | -46.0 | Dark | Up | 32.0 | 63.3 | Up | 05:38:17 - 06:08:08 | -4441 |
| Goldendale | 05:53:15 | -46.2 | Dark | Up | 31.5 | 62.8 | Up | 05:38:20 - 06:08:11 | -4475 |
| The Dalles | 05:53:16 | -46.2 | Dark | Up | 31.2 | 62.5 | Up | 05:38:21 - 06:08:12 | -4480 |
| Pasco | 05:53:10 | -46.7 | Dark | Up | 32.7 | 63.9 | Up | 05:38:15 - 06:08:06 | -4503 |
| Maupin | 05:53:17 | -46.5 | Dark | Up | 31.1 | 62.3 | Up | 05:38:22 - 06:08:13 | -4524 |
| George/Umatilla | 05:53:12 | -46.8 | Dark | Up | 32.5 | 63.6 | Up | 05:38:17 - 06:08:08 | -4526 |
| PNWRO | 05:53:11 | -47.0 | Dark | Up | 32.8 | 63.9 | Up | 05:38:15 - 06:08:06 | -4535 |
| Madras/Culver | 05:53:19 | -46.9 | Dark | Up | 30.8 | 62.0 | Up | 05:38:23 - 06:08:14 | -4573 |
| Sisters | 05:53:21 | -46.9 | Dark | Up | 30.3 | 61.6 | Up | 05:38:25 - 06:08:16 | -4585 |
| Redmond | 05:53:20 | -47.1 | Dark | Up | 30.6 | 61.8 | Up | 05:38:24 - 06:08:15 | -4604 |
| Bend | 05:53:21 | -47.2 | Dark | Up | 30.4 | 61.6 | Up | 05:38:25 - 06:08:16 | -4618 |
| Oregon Observatory | 05:53:22 | -47.3 | Dark | Up | 30.2 | 61.4 | Up | 05:38:26 - 06:08:17 | -4628 |
| La Pine/Gilchrist | 05:53:22 | -47.4 | Dark | Up | 30.1 | 61.3 | Up | 05:38:26 - 06:08:17 | -4645 |
| North Lake | 05:53:22 | -48.0 | Dark | Up | 30.3 | 61.4 | Up | 05:38:27 - 06:08:18 | -4711 |
| Chiloquin | 05:53:26 | -48.0 | Dark | Up | 29.3 | 60.6 | Low | 05:38:30 - 06:08:21 | -4733 |
| Klamath Falls | 05:53:27 | -48.3 | Dark | Up | 29.2 | 60.5 | Low | 05:38:31 - 06:08:22 | -4768 |
| Paisley | 05:53:23 | -48.6 | Dark | Up | 30.2 | 61.3 | Up | 05:38:27 - 06:08:18 | -4779 |
| Tulelake | 05:53:25 | -48.6 | Dark | Up | 29.3 | 60.5 | Low | 05:38:30 - 06:08:21 | -4807 |
| Lakeview | 05:53:23 | -49.1 | Dark | Up | 30.1 | 61.1 | Up | 05:38:28 - 06:08:19 | -4835 |
| Fall River/Burney | 05:53:28 | -49.3 | Dark | Up | 28.9 | 60.1 | Low | 05:38:33 - 06:08:24 | -4895 |
| Cedarville | 05:53:25 | -49.6 | Dark | Up | 29.9 | 60.9 | Low | 05:38:29 - 06:08:20 | -4904 |
| Susanville | 05:53:28 | -50.1 | Dark | Up | 29.1 | 60.1 | Low | 05:38:33 - 06:08:24 | -4988 |
| Greenville | 05:53:29 | -50.1 | Dark | Up | 28.7 | 59.8 | Low | 05:38:33 - 06:08:24 | -5000 |
| Gimple | 05:53:29 | -50.2 | Dark | Up | 28.8 | 59.9 | Low | 05:38:34 - 06:08:25 | -5004 |
| Quincy | 05:53:30 | -50.3 | Dark | Up | 28.6 | 59.7 | Low | 05:38:35 - 06:08:26 | -5020 |
| Portola | 05:53:29 | -50.6 | Dark | Up | 28.9 | 59.9 | Low | 05:38:33 - 06:08:24 | -5053 |
| Reno | 05:53:28 | -51.2 | Dark | Up | 29.2 | 60.0 | Low | 05:38:32 - 06:08:23 | -5107 |
| Carson City | 05:53:29 | -51.4 | Dark | Up | 29.0 | 59.9 | Low | 05:38:34 - 06:08:25 | -5142 |
| Gardnerville | 05:53:28 | -51.6 | Dark | Up | 28.9 | 59.8 | Low | 05:38:33 - 06:08:24 | -5168 |
| Yerington | 05:53:28 | -51.9 | Dark | Up | 29.4 | 60.0 | Low | 05:38:32 - 06:08:23 | -5189 |
| Hawthorne | 05:53:27 | -52.5 | Dark | Up | 29.5 | 60.0 | Low | 05:38:32 - 06:08:23 | -5257 |
| Lee Vining | 05:53:30 | -52.7 | Dark | Up | 28.9 | 59.6 | Low | 05:38:34 - 06:08:25 | -5289 |
| Tonopah | 05:53:24 | -53.7 | Dark | Up | 30.2 | 60.4 | Up | 05:38:29 - 06:08:20 | -5365 |
| Bishop | 05:53:29 | -53.5 | Dark | Up | 29.1 | 59.6 | Low | 05:38:34 - 06:08:25 | -5379 |
| Lone Pine | 05:53:29 | -54.2 | Dark | Up | 28.9 | 59.3 | Low | 05:38:34 - 06:08:25 | -5467 |
| CPSLO | 05:53:38 | -53.4 | Dark | Up | 26.5 | 57.8 | Low | 05:38:42 - 06:08:33 | -5469 |
| Beatty | 05:53:26 | -54.7 | Dark | Up | 29.9 | 59.9 | Low | 05:38:30 - 06:08:21 | -5496 |
| Indian Springs | 05:53:23 | -55.6 | Dark | Up | 30.5 | 60.2 | Up | 05:38:28 - 06:08:19 | -5575 |
| Niwot | 05:52:47 | -57.3 | Dark | Up | 39.4 | 66.3 | Up | 05:37:52 - 06:07:43 | -5618 |
| Henderson | 05:53:22 | -56.3 | Dark | Up | 30.7 | 60.1 | Up | 05:38:26 - 06:08:17 | -5657 |
| Wildwood | 05:53:34 | -55.5 | Dark | Up | 27.2 | 58.0 | Low | 05:38:38 - 06:08:29 | -5682 |
| Searchlight/Boulder City | 05:53:23 | -56.8 | Dark | Up | 30.5 | 59.9 | Up | 05:38:27 - 06:08:18 | -5715 |
| Laughlin/Bullhead City | 05:53:22 | -57.2 | Dark | Up | 30.6 | 59.8 | Up | 05:38:27 - 06:08:18 | -5759 |
| Patrick | 05:53:21 | -57.4 | Dark | Up | 31.2 | 60.2 | Up | 05:38:26 - 06:08:17 | -5766 |
| Kingman/Dolan Springs | 05:53:21 | -57.5 | Dark | Up | 31.0 | 60.0 | Up | 05:38:25 - 06:08:16 | -5779 |
| Mohave Valley | 05:53:23 | -57.4 | Dark | Up | 30.5 | 59.7 | Up | 05:38:27 - 06:08:18 | -5786 |
| Idyllwild | 05:53:30 | -56.9 | Dark | Up | 28.4 | 58.5 | Low | 05:38:34 - 06:08:25 | -5804 |
| DCO | 05:53:19 | -58.0 | Dark | Up | 31.6 | 60.3 | Up | 05:38:23 - 06:08:14 | -5826 |
| Lake Havasu City | 05:53:23 | -57.8 | Dark | Up | 30.4 | 59.6 | Up | 05:38:27 - 06:08:18 | -5836 |
| Parker | 05:53:23 | -58.1 | Dark | Up | 30.3 | 59.4 | Up | 05:38:27 - 06:08:18 | -5872 |
| Blythe | 05:53:24 | -58.3 | Dark | Up | 29.8 | 59.1 | Low | 05:38:28 - 06:08:19 | -5910 |
| Calipatria | 05:53:27 | -58.1 | Dark | Up | 28.9 | 58.5 | Low | 05:38:31 - 06:08:22 | -5916 |
| Yuma | 05:53:25 | -58.9 | Dark | Up | 29.3 | 58.6 | Low | 05:38:30 - 06:08:21 | -5998 |
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 8405, (2018/10/18 05:47UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 24.99 119 3Iot Aur 04:56:59.6 +33:09:58 2.7 7.68 125 10Eta Aur 05:06:30.9 +41:14:03 3.2 1.30 127 PPM 047782 05:09:59.8 +40:09:09 8.5 0.28 127 PPM 047786 05:10:16.3 +40:21:18 9.6 0.20 127 8405 05:11:14.7 +40:17:39 15.8 128 Positions are for J2000
Event circumstances last updated at 2018/05/24 18:04:47 UT
Marc W. Buie, Southwest Research Institute