RECON: TNO occultation with 8405

Event between (8405) Asbolus and star UC4-649-024024 with event index number of 85988

Geocentric closest approach at 2017/10/07 07:26:09 UTC

J2000 position of star is 04:59:00.9 +39:42:15
Equinox of date position of star is 05:00:13.7 +39:43:47
Stellar brightness R=16.1, use SENSEUP=128
Star is 48 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 21.0 AU from the Sun and 20.6 AU from the Earth.
The TNO is moving 12.2 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 191 seconds.
The 1-sigma cross-track error in the shadow position is 2132 km.
The sky-plane scale is 14942.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 7.5 sec chord
Diameter=37.2 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2017/10/07 07:26UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:56.5 +16:32:37  0.8 23.73  35
3Iot Aur       04:58:09.2 +33:11:33  2.7  6.55  45
5 Aur          05:01:31.8 +39:25:12  6.4  0.40  48
6 Aur          05:01:36.8 +39:40:47  7.9  0.27  48
PPM 069786     04:59:04.2 +39:39:30  8.8  0.24  48
8405           05:00:14.5 +39:43:48 16.1        48
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 4.7 sigma about the mid-time.
The median site spacing is 26.1 km RECON observability=1.0 and success probability=12.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:32:24 -46.6 Dark Up 44.1 76.0 Up 07:17:24 - 07:47:24 -2565
Tonasket 07:32:24 -46.8 Dark Up 44.0 75.8 Up 07:17:24 - 07:47:24 -2591
Okanogan 07:32:24 -47.1 Dark Up 43.8 75.4 Up 07:17:24 - 07:47:24 -2625
Brewster 07:32:27 -47.4 Dark Up 43.7 75.0 Up 07:17:27 - 07:47:27 -2651
Manson/Chelan 07:32:28 -47.6 Dark Up 43.4 74.6 Up 07:17:28 - 07:47:28 -2667
Entiat 07:32:28 -47.8 Dark Up 43.3 74.4 Up 07:17:28 - 07:47:28 -2690
Wenatchee 07:32:30 -48.0 Dark Up 43.1 74.1 Up 07:17:30 - 07:47:30 -2715
Ellensburg 07:32:32 -48.4 Dark Up 42.9 73.6 Up 07:17:32 - 07:47:32 -2756
Yakima 07:32:31 -48.8 Dark Up 42.7 73.2 Up 07:17:31 - 07:47:31 -2800
Toppenish/White Swan 07:32:31 -49.1 Dark Up 42.8 73.1 Up 07:17:31 - 07:47:31 -2826
Pasco 07:32:25 -49.3 Dark Up 43.6 73.7 Up 07:17:25 - 07:47:25 -2861
Goldendale 07:32:33 -49.6 Dark Up 42.4 72.4 Up 07:17:33 - 07:47:33 -2878
PNWRO 07:32:25 -49.5 Dark Up 43.7 73.6 Up 07:17:25 - 07:47:25 -2892
George/Umatilla 07:32:26 -49.6 Dark Up 43.3 73.3 Up 07:17:26 - 07:47:26 -2894
The Dalles 07:32:35 -49.8 Dark Up 42.0 72.0 Up 07:17:35 - 07:47:35 -2895
Maupin 07:32:34 -50.2 Dark Up 42.0 71.7 Up 07:17:34 - 07:47:34 -2942
Madras/Culver 07:32:35 -50.7 Dark Up 41.8 71.2 Up 07:17:35 - 07:47:35 -3001
Sisters 07:32:37 -51.0 Dark Up 41.4 70.7 Up 07:17:37 - 07:47:37 -3028
Redmond 07:32:36 -51.1 Dark Up 41.6 70.9 Up 07:17:36 - 07:47:36 -3038
Bend 07:32:36 -51.3 Dark Up 41.5 70.7 Up 07:17:36 - 07:47:36 -3058
Oregon Observatory 07:32:37 -51.4 Dark Up 41.3 70.5 Up 07:17:37 - 07:47:37 -3074
La Pine/Gilchrist 07:32:38 -51.6 Dark Up 41.2 70.3 Up 07:17:38 - 07:47:38 -3095
North Lake 07:32:35 -52.1 Dark Up 41.5 70.2 Up 07:17:35 - 07:47:35 -3153
Chiloquin 07:32:40 -52.7 Dark Up 40.6 69.2 Up 07:17:40 - 07:47:40 -3207
Paisley 07:32:34 -52.7 Dark Up 41.5 69.9 Up 07:17:34 - 07:47:34 -3219
Klamath Falls 07:32:39 -53.1 Dark Up 40.5 69.0 Up 07:17:39 - 07:47:39 -3245
Lakeview 07:32:34 -53.2 Dark Up 41.5 69.5 Up 07:17:34 - 07:47:34 -3277
Tulelake 07:32:39 -53.4 Dark Up 40.6 68.9 Up 07:17:39 - 07:47:39 -3280
Cedarville 07:32:34 -53.9 Dark Up 41.4 69.1 Up 07:17:34 - 07:47:34 -3351
Fall River/Burney 07:32:39 -54.3 Dark Up 40.4 68.2 Up 07:17:39 - 07:47:39 -3378
Susanville 07:32:35 -55.0 Dark Up 40.6 68.0 Up 07:17:35 - 07:47:35 -3460
Greenville 07:32:39 -55.2 Dark Up 40.3 67.7 Up 07:17:39 - 07:47:39 -3484
Gimple 07:32:36 -55.2 Dark Up 40.4 67.7 Up 07:17:36 - 07:47:36 -3486
Quincy 07:32:37 -55.4 Dark Up 40.3 67.5 Up 07:17:37 - 07:47:37 -3505
Portola 07:32:34 -55.6 Dark Up 40.5 67.6 Up 07:17:34 - 07:47:34 -3528
Reno 07:32:32 -55.9 Dark Up 40.9 67.6 Up 07:17:32 - 07:47:32 -3569
Carson City 07:32:32 -56.3 Dark Up 40.8 67.3 Up 07:17:32 - 07:47:32 -3608
Gardnerville 07:32:31 -56.5 Dark Up 40.7 67.2 Up 07:17:31 - 07:47:31 -3635
Yerington 07:32:28 -56.5 Dark Up 41.1 67.4 Up 07:17:28 - 07:47:28 -3641
Niwot 07:31:19 -54.2 Dark Up 51.5 73.6 Up 07:16:19 - 07:46:19 -3671
Hawthorne 07:32:26 -57.0 Dark Up 41.3 67.2 Up 07:17:26 - 07:47:26 -3700
Lee Vining 07:32:28 -57.5 Dark Up 40.8 66.6 Up 07:17:28 - 07:47:28 -3751
Tonopah 07:32:19 -57.5 Dark Up 42.2 67.3 Up 07:17:19 - 07:47:19 -3774
Bishop 07:32:24 -58.2 Dark Up 41.0 66.4 Up 07:17:24 - 07:47:24 -3827
Beatty 07:32:18 -58.7 Dark Up 42.0 66.5 Up 07:17:18 - 07:47:18 -3904
Lone Pine 07:32:24 -59.0 Dark Up 41.0 65.9 Up 07:17:24 - 07:47:24 -3914
Indian Springs 07:32:12 -59.0 Dark Up 42.7 66.6 Up 07:17:12 - 07:47:12 -3956
CPSLO 07:32:35 -60.0 Dark Up 38.6 64.1 Up 07:17:35 - 07:47:35 -3999
Henderson 07:32:06 -59.6 Dark Up 43.0 66.3 Up 07:17:06 - 07:47:06 -4023
Searchlight/Boulder City 07:32:06 -60.1 Dark Up 42.8 65.8 Up 07:17:06 - 07:47:06 -4085
Patrick 07:32:01 -60.1 Dark Up 43.5 66.1 Up 07:17:01 - 07:47:01 -4105
Laughlin/Bullhead City 07:32:06 -60.4 Dark Up 42.9 65.7 Up 07:17:06 - 07:47:06 -4121
Kingman/Dolan Springs 07:32:01 -60.4 Dark Up 43.3 65.8 Up 07:17:01 - 07:47:01 -4126
DCO 07:31:59 -60.4 Dark Up 43.9 66.0 Up 07:16:59 - 07:46:59 -4147
Mohave Valley 07:32:05 -60.7 Dark Up 42.8 65.4 Up 07:17:05 - 07:47:05 -4150
Wildwood 07:32:24 -61.4 Dark Up 39.5 63.8 Up 07:17:24 - 07:47:24 -4166
Lake Havasu City 07:32:04 -61.1 Dark Up 42.8 65.2 Up 07:17:04 - 07:47:04 -4195
Parker 07:32:01 -61.4 Dark Up 42.7 64.9 Up 07:17:01 - 07:47:01 -4233
Idyllwild 07:32:16 -61.9 Dark Up 40.7 64.0 Up 07:17:16 - 07:47:16 -4238
Blythe 07:32:03 -62.0 Dark Up 42.2 64.4 Up 07:17:03 - 07:47:03 -4283
Calipatria 07:32:09 -62.5 Dark Up 41.3 63.8 Up 07:17:09 - 07:47:09 -4321
Yuma 07:32:04 -62.9 Dark Up 41.8 63.6 Up 07:17:04 - 07:47:04 -4379

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, (2017/10/07 07:26UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 23.73  35
3Iot Aur       04:56:59.6 +33:09:58  2.7  6.55  45
5 Aur          05:00:18.3 +39:23:41  6.4  0.40  48
6 Aur          05:00:23.1 +39:39:16  7.9  0.27  48
PPM 069786     04:57:50.6 +39:37:56  8.8  0.24  48
8405           04:59:00.9 +39:42:15 16.1        48
Positions are for J2000

Event circumstances last updated at 2017/07/25 16:13:12 UT

Marc W. Buie, Southwest Research Institute

RECON