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 05:12:28.3 +40:18:52
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 186 seconds.
The 1-sigma cross-track error in the shadow position is 1767 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 4.8 sigma about the mid-time.
The median site spacing is 22.6 km RECON observability=1.0 and success probability=21.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:52:16 -44.4 Dark Up 33.6 65.2 Up 05:37:16 - 06:07:16 -842
Tonasket 05:52:18 -44.6 Dark Up 33.5 65.0 Up 05:37:18 - 06:07:18 -864
Okanogan 05:52:19 -44.8 Dark Up 33.2 64.8 Up 05:37:19 - 06:07:19 -889
Brewster 05:52:19 -44.9 Dark Up 33.0 64.5 Up 05:37:19 - 06:07:19 -907
Manson/Chelan 05:52:21 -44.9 Dark Up 32.7 64.2 Up 05:37:21 - 06:07:21 -912
Entiat 05:52:21 -45.0 Dark Up 32.6 64.0 Up 05:37:21 - 06:07:21 -929
Wenatchee 05:52:22 -45.2 Dark Up 32.4 63.8 Up 05:37:22 - 06:07:22 -949
Ellensburg 05:52:24 -45.4 Dark Up 32.1 63.5 Up 05:37:24 - 06:07:24 -979
Yakima 05:52:25 -45.7 Dark Up 31.9 63.2 Up 05:37:25 - 06:07:25 -1016
Toppenish/White Swan 05:52:25 -45.9 Dark Up 31.9 63.2 Up 05:37:25 - 06:07:25 -1043
Goldendale 05:52:28 -46.1 Dark Up 31.4 62.7 Up 05:37:28 - 06:07:28 -1077
The Dalles 05:52:29 -46.1 Dark Up 31.1 62.4 Up 05:37:29 - 06:07:29 -1083
Pasco 05:52:23 -46.6 Dark Up 32.6 63.8 Up 05:37:23 - 06:07:23 -1105
Maupin 05:52:30 -46.4 Dark Up 30.9 62.2 Up 05:37:30 - 06:07:30 -1126
George/Umatilla 05:52:25 -46.7 Dark Up 32.3 63.5 Up 05:37:25 - 06:07:25 -1128
PNWRO 05:52:24 -46.9 Dark Up 32.7 63.8 Up 05:37:24 - 06:07:24 -1138
Madras/Culver 05:52:32 -46.8 Dark Up 30.7 61.9 Up 05:37:32 - 06:07:32 -1175
Sisters 05:52:34 -46.8 Dark Up 30.2 61.5 Up 05:37:34 - 06:07:34 -1187
Redmond 05:52:33 -47.0 Dark Up 30.5 61.7 Up 05:37:33 - 06:07:33 -1206
Bend 05:52:34 -47.1 Dark Up 30.3 61.5 Up 05:37:34 - 06:07:34 -1220
Oregon Observatory 05:52:35 -47.2 Dark Up 30.1 61.3 Up 05:37:35 - 06:07:35 -1231
La Pine/Gilchrist 05:52:36 -47.3 Dark Up 30.0 61.2 Low 05:37:36 - 06:07:36 -1247
North Lake 05:52:35 -47.9 Dark Up 30.1 61.3 Up 05:37:35 - 06:07:35 -1314
Chiloquin 05:52:39 -47.9 Dark Up 29.2 60.5 Low 05:37:39 - 06:07:39 -1335
Klamath Falls 05:52:39 -48.2 Dark Up 29.1 60.4 Low 05:37:39 - 06:07:39 -1371
Paisley 05:52:36 -48.5 Dark Up 30.1 61.2 Up 05:37:36 - 06:07:36 -1381
Tulelake 05:52:39 -48.5 Dark Up 29.2 60.4 Low 05:37:39 - 06:07:39 -1409
Lakeview 05:52:36 -48.9 Dark Up 30.0 61.0 Low 05:37:36 - 06:07:36 -1437
Fall River/Burney 05:52:42 -49.2 Dark Up 28.8 60.0 Low 05:37:42 - 06:07:42 -1498
Cedarville 05:52:38 -49.5 Dark Up 29.8 60.8 Low 05:37:38 - 06:07:38 -1507
Susanville 05:52:41 -50.0 Dark Up 28.9 60.0 Low 05:37:41 - 06:07:41 -1590
Greenville 05:52:43 -50.0 Dark Up 28.6 59.8 Low 05:37:43 - 06:07:43 -1603
Gimple 05:52:43 -50.1 Dark Up 28.7 59.8 Low 05:37:43 - 06:07:43 -1607
Quincy 05:52:43 -50.2 Dark Up 28.5 59.7 Low 05:37:43 - 06:07:43 -1622
Portola 05:52:42 -50.5 Dark Up 28.8 59.8 Low 05:37:42 - 06:07:42 -1656
Reno 05:52:42 -51.1 Dark Up 29.1 60.0 Low 05:37:42 - 06:07:42 -1710
Carson City 05:52:42 -51.3 Dark Up 28.9 59.8 Low 05:37:42 - 06:07:42 -1745
Gardnerville 05:52:43 -51.5 Dark Up 28.8 59.7 Low 05:37:43 - 06:07:43 -1770
Yerington 05:52:41 -51.8 Dark Up 29.2 60.0 Low 05:37:41 - 06:07:41 -1792
Hawthorne 05:52:41 -52.4 Dark Up 29.3 60.0 Low 05:37:41 - 06:07:41 -1860
Lee Vining 05:52:43 -52.5 Dark Up 28.7 59.5 Low 05:37:43 - 06:07:43 -1892
Tonopah 05:52:39 -53.6 Dark Up 30.1 60.3 Up 05:37:39 - 06:07:39 -1967
Bishop 05:52:43 -53.4 Dark Up 28.9 59.5 Low 05:37:43 - 06:07:43 -1982
Lone Pine 05:52:43 -54.1 Dark Up 28.8 59.3 Low 05:37:43 - 06:07:43 -2070
CPSLO 05:52:51 -53.3 Dark Up 26.3 57.7 Low 05:37:51 - 06:07:51 -2072
Beatty 05:52:39 -54.6 Dark Up 29.8 59.9 Low 05:37:39 - 06:07:39 -2099
Indian Springs 05:52:37 -55.5 Dark Up 30.4 60.1 Up 05:37:37 - 06:07:37 -2177
Niwot 05:52:00 -57.2 Dark Up 39.2 66.2 Up 05:37:00 - 06:07:00 -2219
Henderson 05:52:36 -56.2 Dark Up 30.6 60.1 Up 05:37:36 - 06:07:36 -2259
Wildwood 05:52:48 -55.4 Dark Up 27.1 57.9 Low 05:37:48 - 06:07:48 -2285
Searchlight/Boulder City 05:52:36 -56.7 Dark Up 30.4 59.8 Up 05:37:36 - 06:07:36 -2318
Laughlin/Bullhead City 05:52:36 -57.1 Dark Up 30.5 59.8 Up 05:37:36 - 06:07:36 -2362
Patrick 05:52:33 -57.3 Dark Up 31.1 60.1 Up 05:37:33 - 06:07:33 -2368
Kingman/Dolan Springs 05:52:35 -57.4 Dark Up 30.8 60.0 Up 05:37:35 - 06:07:35 -2382
Mohave Valley 05:52:36 -57.3 Dark Up 30.3 59.6 Up 05:37:36 - 06:07:36 -2389
Idyllwild 05:52:43 -56.8 Dark Up 28.2 58.4 Low 05:37:43 - 06:07:43 -2406
DCO 05:52:31 -57.9 Dark Up 31.4 60.2 Up 05:37:31 - 06:07:31 -2428
Lake Havasu City 05:52:36 -57.7 Dark Up 30.3 59.5 Up 05:37:36 - 06:07:36 -2439
Parker 05:52:36 -58.0 Dark Up 30.1 59.3 Up 05:37:36 - 06:07:36 -2474
Blythe 05:52:38 -58.2 Dark Up 29.7 59.0 Low 05:37:38 - 06:07:38 -2512
Calipatria 05:52:40 -57.9 Dark Up 28.7 58.5 Low 05:37:40 - 06:07:40 -2519
Yuma 05:52:39 -58.8 Dark Up 29.2 58.5 Low 05:37:39 - 06:07:39 -2600

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 2017/08/02 16:57:45 UT

Marc W. Buie, Southwest Research Institute

RECON