RECON: TNO occultation with 8405

Event between (8405) Asbolus and star UC4-652-028542 with event index number of 156261

Geocentric closest approach at 2018/10/18 05:46:30 UTC

J2000 position of star is 05:11:14.7 +40:17:39
Equinox of date position of star is 05:12:29.7 +40:18:54
Stellar brightness R=15.5, 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 199 seconds.
The 1-sigma cross-track error in the shadow position is 1874 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 05:46UT)
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 15.5       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 4.5 sigma about the mid-time.
The median site spacing is 23.1 km RECON observability=1.0 and success probability=21.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:52:17 -44.4 Dark Up 33.6 65.2 Up 05:37:17 - 06:07:17 -831
Tonasket 05:52:18 -44.6 Dark Up 33.5 65.0 Up 05:37:18 - 06:07:18 -853
Okanogan 05:52:19 -44.8 Dark Up 33.2 64.8 Up 05:37:19 - 06:07:19 -878
Brewster 05:52:20 -44.9 Dark Up 33.0 64.5 Up 05:37:20 - 06:07:20 -896
Manson/Chelan 05:52:21 -44.9 Dark Up 32.7 64.2 Up 05:37:21 - 06:07:21 -901
Entiat 05:52:22 -45.0 Dark Up 32.6 64.0 Up 05:37:22 - 06:07:22 -918
Wenatchee 05:52:23 -45.2 Dark Up 32.4 63.8 Up 05:37:23 - 06:07:23 -938
Ellensburg 05:52:25 -45.4 Dark Up 32.1 63.5 Up 05:37:25 - 06:07:25 -967
Yakima 05:52:26 -45.7 Dark Up 31.9 63.2 Up 05:37:26 - 06:07:26 -1004
Toppenish/White Swan 05:52:27 -45.9 Dark Up 31.9 63.2 Up 05:37:27 - 06:07:27 -1031
Goldendale 05:52:29 -46.1 Dark Up 31.4 62.7 Up 05:37:29 - 06:07:29 -1065
The Dalles 05:52:30 -46.1 Dark Up 31.1 62.4 Up 05:37:30 - 06:07:30 -1071
Pasco 05:52:24 -46.6 Dark Up 32.6 63.8 Up 05:37:24 - 06:07:24 -1094
Maupin 05:52:31 -46.4 Dark Up 30.9 62.2 Up 05:37:31 - 06:07:31 -1114
George/Umatilla 05:52:25 -46.7 Dark Up 32.3 63.5 Up 05:37:25 - 06:07:25 -1117
PNWRO 05:52:25 -46.9 Dark Up 32.7 63.8 Up 05:37:25 - 06:07:25 -1126
Madras/Culver 05:52:33 -46.8 Dark Up 30.7 61.9 Up 05:37:33 - 06:07:33 -1163
Sisters 05:52:35 -46.8 Dark Up 30.2 61.5 Up 05:37:35 - 06:07:35 -1175
Redmond 05:52:34 -47.0 Dark Up 30.5 61.7 Up 05:37:34 - 06:07:34 -1194
Bend 05:52:35 -47.1 Dark Up 30.3 61.5 Up 05:37:35 - 06:07:35 -1208
Oregon Observatory 05:52:36 -47.2 Dark Up 30.1 61.3 Up 05:37:36 - 06:07:36 -1219
La Pine/Gilchrist 05:52:36 -47.3 Dark Up 30.0 61.2 Low 05:37:36 - 06:07:36 -1235
North Lake 05:52:36 -47.9 Dark Up 30.1 61.3 Up 05:37:36 - 06:07:36 -1302
Chiloquin 05:52:39 -47.9 Dark Up 29.2 60.5 Low 05:37:39 - 06:07:39 -1323
Klamath Falls 05:52:40 -48.2 Dark Up 29.1 60.4 Low 05:37:40 - 06:07:40 -1358
Paisley 05:52:36 -48.5 Dark Up 30.1 61.2 Up 05:37:36 - 06:07:36 -1369
Tulelake 05:52:40 -48.5 Dark Up 29.2 60.4 Low 05:37:40 - 06:07:40 -1397
Lakeview 05:52:37 -48.9 Dark Up 30.0 61.0 Low 05:37:37 - 06:07:37 -1425
Fall River/Burney 05:52:42 -49.2 Dark Up 28.8 60.0 Low 05:37:42 - 06:07:42 -1485
Cedarville 05:52:39 -49.5 Dark Up 29.8 60.8 Low 05:37:39 - 06:07:39 -1494
Susanville 05:52:42 -50.0 Dark Up 28.9 60.0 Low 05:37:42 - 06:07:42 -1578
Greenville 05:52:43 -50.0 Dark Up 28.6 59.8 Low 05:37:43 - 06:07:43 -1590
Gimple 05:52:43 -50.1 Dark Up 28.7 59.8 Low 05:37:43 - 06:07:43 -1594
Quincy 05:52:43 -50.2 Dark Up 28.5 59.7 Low 05:37:43 - 06:07:43 -1609
Portola 05:52:43 -50.5 Dark Up 28.8 59.8 Low 05:37:43 - 06:07:43 -1643
Reno 05:52:41 -51.1 Dark Up 29.1 60.0 Low 05:37:41 - 06:07:41 -1697
Carson City 05:52:43 -51.3 Dark Up 28.9 59.8 Low 05:37:43 - 06:07:43 -1732
Gardnerville 05:52:43 -51.5 Dark Up 28.8 59.7 Low 05:37:43 - 06:07:43 -1758
Yerington 05:52:42 -51.8 Dark Up 29.2 60.0 Low 05:37:42 - 06:07:42 -1779
Hawthorne 05:52:41 -52.4 Dark Up 29.3 60.0 Low 05:37:41 - 06:07:41 -1847
Lee Vining 05:52:43 -52.5 Dark Up 28.7 59.5 Low 05:37:43 - 06:07:43 -1879
Tonopah 05:52:39 -53.6 Dark Up 30.1 60.3 Up 05:37:39 - 06:07:39 -1955
Bishop 05:52:43 -53.4 Dark Up 28.9 59.5 Low 05:37:43 - 06:07:43 -1969
Lone Pine 05:52:44 -54.1 Dark Up 28.8 59.3 Low 05:37:44 - 06:07:44 -2057
CPSLO 05:52:52 -53.3 Dark Up 26.3 57.7 Low 05:37:52 - 06:07:52 -2058
Beatty 05:52:40 -54.6 Dark Up 29.8 59.9 Low 05:37:40 - 06:07:40 -2086
Indian Springs 05:52:37 -55.5 Dark Up 30.4 60.1 Up 05:37:37 - 06:07:37 -2165
Niwot 05:52:00 -57.2 Dark Up 39.2 66.2 Up 05:37:00 - 06:07:00 -2210
Henderson 05:52:36 -56.2 Dark Up 30.6 60.1 Up 05:37:36 - 06:07:36 -2247
Wildwood 05:52:49 -55.4 Dark Up 27.1 57.9 Low 05:37:49 - 06:07:49 -2271
Searchlight/Boulder City 05:52:37 -56.7 Dark Up 30.4 59.8 Up 05:37:37 - 06:07:37 -2306
Laughlin/Bullhead City 05:52:36 -57.1 Dark Up 30.5 59.8 Up 05:37:36 - 06:07:36 -2349
Patrick 05:52:35 -57.3 Dark Up 31.1 60.1 Up 05:37:35 - 06:07:35 -2356
Kingman/Dolan Springs 05:52:36 -57.4 Dark Up 30.8 60.0 Up 05:37:36 - 06:07:36 -2370
Mohave Valley 05:52:37 -57.3 Dark Up 30.3 59.6 Up 05:37:37 - 06:07:37 -2376
Idyllwild 05:52:44 -56.8 Dark Up 28.2 58.4 Low 05:37:44 - 06:07:44 -2393
DCO 05:52:32 -57.9 Dark Up 31.4 60.2 Up 05:37:32 - 06:07:32 -2416
Lake Havasu City 05:52:36 -57.7 Dark Up 30.3 59.5 Up 05:37:36 - 06:07:36 -2426
Parker 05:52:37 -58.0 Dark Up 30.1 59.3 Up 05:37:37 - 06:07:37 -2462
Blythe 05:52:39 -58.2 Dark Up 29.7 59.0 Low 05:37:39 - 06:07:39 -2500
Calipatria 05:52:42 -57.9 Dark Up 28.7 58.5 Low 05:37:42 - 06:07:42 -2506
Yuma 05:52:39 -58.8 Dark Up 29.2 58.5 Low 05:37:39 - 06:07:39 -2588

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 05:46UT)
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 15.5       128
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:00:07 UT

Marc W. Buie, Southwest Research Institute

RECON