RECON: TNO occultation with 04TF282

Event between 04TF282 and star UC4-525-009251 with event index number of 93272

Geocentric closest approach at 2017/12/06 11:09:41 UTC

J2000 position of star is 04:45:19.6 +14:59:26
Equinox of date position of star is 04:46:18.9 +15:01:16
Stellar brightness R=15.7, use SENSEUP=128
Star is 43 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 40.9 AU from the Sun and 39.9 AU from the Earth.
The TNO is moving 25.1 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 193 seconds.
The 1-sigma cross-track error in the shadow position is 2255 km.
The sky-plane scale is 28968.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=361.4 km assuming a 5% albedo -- 14.4 sec chord
Diameter=147.5 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 04TF282, (2017/12/06 11:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.1 +16:32:38  0.8  2.72  44
Bellatrix      05:26:05.6 +06:21:52  1.6 13.04  36
91Sig1Tau      04:40:10.7 +15:50:02  5.3  1.69  44
PPM 120199     04:45:45.8 +14:39:31  8.2  0.39  43
04TF282        04:46:20.9 +15:01:20 15.7        42
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 24.2 km RECON observability=1.0 and success probability=2.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:07:01 -43.1 Dark Up 36.2 249.4 Up 10:52:01 - 11:22:01 7352
Tonasket 11:07:00 -43.1 Dark Up 36.3 249.5 Up 10:52:00 - 11:22:00 7329
Okanogan 11:07:00 -43.3 Dark Up 36.5 249.6 Up 10:52:00 - 11:22:00 7296
Brewster 11:07:00 -43.5 Dark Up 36.7 249.6 Up 10:52:00 - 11:22:00 7269
Manson/Chelan 11:07:00 -43.8 Dark Up 37.0 249.4 Up 10:52:00 - 11:22:00 7247
Entiat 11:07:00 -43.9 Dark Up 37.2 249.5 Up 10:52:00 - 11:22:00 7225
Wenatchee 11:07:00 -44.0 Dark Up 37.3 249.6 Up 10:52:00 - 11:22:00 7200
Ellensburg 11:06:59 -44.3 Dark Up 37.6 249.7 Up 10:51:59 - 11:21:59 7159
Yakima 11:06:59 -44.4 Dark Up 37.7 250.0 Up 10:51:59 - 11:21:59 7119
Toppenish/White Swan 11:06:58 -44.4 Dark Up 37.7 250.3 Up 10:51:58 - 11:21:58 7098
Pasco 11:06:55 -43.5 Dark Up 36.9 251.5 Up 10:51:55 - 11:21:55 7093
PNWRO 11:06:54 -43.4 Dark Up 36.9 251.9 Up 10:51:54 - 11:21:54 7070
George/Umatilla 11:06:55 -43.8 Dark Up 37.2 251.5 Up 10:51:55 - 11:21:55 7059
Goldendale 11:06:58 -44.8 Dark Up 38.2 250.3 Up 10:51:58 - 11:21:58 7042
The Dalles 11:06:58 -45.1 Dark Up 38.5 250.1 Up 10:51:58 - 11:21:58 7018
Maupin 11:06:58 -45.1 Dark Up 38.6 250.6 Up 10:51:58 - 11:21:58 6977
Madras/Culver 11:06:57 -45.3 Dark Up 38.8 250.9 Up 10:51:57 - 11:21:57 6922
Sisters 11:06:57 -45.7 Dark Up 39.2 250.8 Up 10:51:57 - 11:21:57 6887
Redmond 11:06:56 -45.4 Dark Up 38.9 251.2 Up 10:51:56 - 11:21:56 6887
Bend 11:06:56 -45.5 Dark Up 39.1 251.2 Up 10:51:56 - 11:21:56 6865
Oregon Observatory 11:06:56 -45.7 Dark Up 39.2 251.2 Up 10:51:56 - 11:21:56 6847
La Pine/Gilchrist 11:06:57 -45.8 Dark Up 39.3 251.3 Up 10:51:57 - 11:21:57 6826
North Lake 11:06:54 -45.4 Dark Up 39.1 252.2 Up 10:51:54 - 11:21:54 6785
Paisley 11:06:52 -45.3 Dark Up 39.0 252.9 Up 10:51:52 - 11:21:52 6731
Chiloquin 11:06:56 -46.2 Dark Up 39.9 251.9 Up 10:51:56 - 11:21:56 6712
Lakeview 11:06:51 -45.2 Dark Up 39.0 253.5 Up 10:51:51 - 11:21:51 6681
Klamath Falls 11:06:55 -46.3 Dark Up 40.0 252.2 Up 10:51:55 - 11:21:55 6677
Tulelake 11:06:53 -46.1 Dark Up 39.9 252.7 Up 10:51:53 - 11:21:53 6651
Cedarville 11:06:50 -45.2 Dark Up 39.1 254.1 Up 10:51:50 - 11:21:50 6615
Niwot 11:06:19 -34.1 Dark Up 28.2 266.1 Low 10:51:19 - 11:21:19 6607
Fall River/Burney 11:06:52 -46.2 Dark Up 40.1 253.5 Up 10:51:52 - 11:21:52 6559
Susanville 11:06:49 -45.8 Dark Up 39.7 254.6 Up 10:51:49 - 11:21:49 6498
Gimple 11:06:49 -46.0 Dark Up 39.9 254.6 Up 10:51:49 - 11:21:49 6468
Greenville 11:06:49 -46.0 Dark Up 40.0 254.6 Up 10:51:49 - 11:21:49 6468
Quincy 11:06:49 -46.1 Dark Up 40.1 254.7 Up 10:51:49 - 11:21:49 6447
Portola 11:06:48 -45.7 Dark Up 39.7 255.2 Up 10:51:48 - 11:21:48 6437
Reno 11:06:46 -45.3 Dark Up 39.3 255.9 Up 10:51:46 - 11:21:46 6413
Carson City 11:06:45 -45.3 Dark Up 39.4 256.2 Up 10:51:45 - 11:21:45 6376
Yerington 11:06:44 -44.8 Dark Up 39.0 256.9 Up 10:51:44 - 11:21:44 6360
Gardnerville 11:06:45 -45.3 Dark Up 39.4 256.5 Up 10:51:45 - 11:21:45 6351
Hawthorne 11:06:42 -44.5 Dark Up 38.7 257.7 Up 10:51:42 - 11:21:42 6315
Tonopah 11:06:38 -43.4 Dark Up 37.7 259.1 Up 10:51:38 - 11:21:38 6276
Lee Vining 11:06:42 -44.9 Dark Up 39.2 257.7 Up 10:51:42 - 11:21:42 6253
Bishop 11:06:40 -44.4 Dark Up 38.7 258.7 Up 10:51:40 - 11:21:40 6195
Beatty 11:06:36 -43.1 Dark Up 37.6 260.3 Up 10:51:36 - 11:21:36 6158
Indian Springs 11:06:33 -42.3 Dark Up 36.8 261.2 Up 10:51:33 - 11:21:33 6132
Lone Pine 11:06:38 -44.2 Dark Up 38.6 259.6 Up 10:51:38 - 11:21:38 6117
Henderson 11:06:31 -41.7 Dark Up 36.3 262.1 Up 10:51:31 - 11:21:31 6082
Patrick 11:06:28 -40.8 Dark Up 35.5 263.3 Up 10:51:28 - 11:21:28 6026
Searchlight/Boulder City 11:06:30 -41.7 Dark Up 36.3 262.6 Up 10:51:30 - 11:21:30 6022
Kingman/Dolan Springs 11:06:28 -41.0 Dark Up 35.7 263.3 Up 10:51:28 - 11:21:28 6001
DCO 11:06:26 -40.3 Dark Up 34.9 263.9 Up 10:51:26 - 11:21:26 6000
Laughlin/Bullhead City 11:06:29 -41.4 Dark Up 36.1 263.0 Up 10:51:29 - 11:21:29 5994
Mohave Valley 11:06:29 -41.4 Dark Up 36.1 263.2 Up 10:51:29 - 11:21:29 5965
CPSLO 11:06:43 -46.3 Dark Up 40.9 258.8 Up 10:51:43 - 11:21:43 5963
Lake Havasu City 11:06:29 -41.2 Dark Up 36.0 263.6 Up 10:51:29 - 11:21:29 5925
Parker 11:06:27 -41.2 Dark Up 36.0 263.9 Up 10:51:27 - 11:21:27 5888
Wildwood 11:06:37 -44.7 Dark Up 39.5 261.2 Up 10:51:37 - 11:21:37 5848
Blythe 11:06:27 -41.4 Dark Up 36.3 264.1 Up 10:51:27 - 11:21:27 5829
Idyllwild 11:06:32 -43.2 Dark Up 38.0 262.7 Up 10:51:32 - 11:21:32 5824
Calipatria 11:06:28 -42.2 Dark Up 37.1 263.9 Up 10:51:28 - 11:21:28 5768
Yuma 11:06:26 -41.4 Dark Up 36.4 264.8 Up 10:51:26 - 11:21:26 5730

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 04TF282, (2017/12/06 11:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  2.72  44
Bellatrix      05:25:07.8 +06:20:58  1.6 13.04  36
91Sig1Tau      04:39:09.2 +15:47:58  5.3  1.69  44
PPM 120199     04:44:44.8 +14:37:36  8.2  0.39  43
04TF282        04:45:19.6 +14:59:26 15.7        43
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:37:53 UT

Marc W. Buie, Southwest Research Institute

RECON