RECON: TNO occultation with 03HF57

Event between 03HF57 and star UC4-362-069083 with event index number of 123214

Geocentric closest approach at 2018/04/22 09:43:23 UTC

J2000 position of star is 15:09:16.3 -17:42:27
Equinox of date position of star is 15:10:17.1 -17:46:30
Stellar brightness R=15.5, use SENSEUP=128
Star is 114 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=24.0

[RECON map]
TNO is 34.4 AU from the Sun and 33.4 AU from the Earth.
The TNO is moving 22.7 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 362 seconds.
The 1-sigma cross-track error in the shadow position is 5401 km.
The sky-plane scale is 24235.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.3 km assuming a 5% albedo -- 5.0 sec chord
Diameter=46.7 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 03HF57, (2018/04/22 09:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.0 -26:28:16  0.9 20.48 134
27Bet Lib      15:17:59.7 -09:26:58  2.6  8.53 114
21Nu Lib       15:07:39.1 -16:19:36  5.2  1.58 113
PPM 229821     15:10:22.4 -18:05:03  8.5  0.31 114
03HF57         15:10:18.4 -17:46:35 15.5       114
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 2.5 sigma about the mid-time.
The median site spacing is 10.8 km RECON observability=1.0 and success probability=3.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:44:01 -24.4 Dark Down 22.8 190.0 Low 09:29:01 - 09:59:01 3454
Tonasket 09:44:01 -24.6 Dark Down 23.0 190.0 Low 09:29:01 - 09:59:01 3445
Okanogan 09:44:01 -24.9 Dark Down 23.4 189.9 Low 09:29:01 - 09:59:01 3429
Brewster 09:44:01 -25.2 Dark Down 23.7 189.7 Low 09:29:01 - 09:59:01 3415
Manson/Chelan 09:44:02 -25.5 Dark Down 23.9 189.3 Low 09:29:02 - 09:59:02 3401
Entiat 09:44:01 -25.7 Dark Down 24.1 189.3 Low 09:29:01 - 09:59:01 3391
Wenatchee 09:44:02 -26.0 Dark Down 24.4 189.2 Low 09:29:02 - 09:59:02 3378
Ellensburg 09:44:02 -26.4 Dark Down 24.8 189.0 Low 09:29:02 - 09:59:02 3357
Pasco 09:43:57 -26.6 Dark Down 25.4 190.5 Low 09:28:57 - 09:58:57 3348
PNWRO 09:43:56 -26.7 Dark Down 25.6 190.8 Low 09:28:56 - 09:58:56 3341
Yakima 09:44:02 -26.8 Dark Down 25.2 189.0 Low 09:29:02 - 09:59:02 3339
Toppenish/White Swan 09:44:01 -26.9 Dark Down 25.4 189.2 Low 09:29:01 - 09:59:01 3333
George/Umatilla 09:43:57 -27.0 Dark Down 25.8 190.3 Low 09:28:57 - 09:58:57 3329
Goldendale 09:44:02 -27.5 Dark Down 26.0 188.8 Low 09:29:02 - 09:59:02 3301
The Dalles 09:44:03 -27.9 Dark Down 26.3 188.4 Low 09:29:03 - 09:59:03 3284
Maupin 09:44:02 -28.2 Dark Down 26.7 188.6 Low 09:29:02 - 09:59:02 3267
Niwot 09:43:01 -25.3 Dark Down 28.1 205.7 Low 09:28:01 - 09:58:01 3243
Madras/Culver 09:44:02 -28.7 Dark Down 27.2 188.5 Low 09:29:02 - 09:59:02 3241
Redmond 09:44:01 -29.0 Dark Down 27.6 188.5 Low 09:29:01 - 09:59:01 3223
Sisters 09:44:03 -29.1 Dark Down 27.6 188.1 Low 09:29:03 - 09:59:03 3217
Bend 09:44:02 -29.3 Dark Down 27.8 188.4 Low 09:29:02 - 09:59:02 3210
Oregon Observatory 09:44:02 -29.5 Dark Down 28.0 188.3 Low 09:29:02 - 09:59:02 3199
La Pine/Gilchrist 09:44:02 -29.7 Dark Down 28.2 188.2 Low 09:29:02 - 09:59:02 3188
North Lake 09:43:59 -29.8 Dark Down 28.6 188.9 Low 09:28:59 - 09:58:59 3178
Paisley 09:43:58 -30.2 Dark Down 29.1 189.3 Low 09:28:58 - 09:58:58 3157
Lakeview 09:43:57 -30.6 Dark Down 29.6 189.6 Low 09:28:57 - 09:58:57 3134
Chiloquin 09:44:02 -30.8 Dark Down 29.4 187.9 Low 09:29:02 - 09:59:02 3126
Klamath Falls 09:44:01 -31.0 Dark Down 29.7 188.0 Low 09:29:01 - 09:59:01 3110
Cedarville 09:43:55 -31.1 Dark Down 30.2 189.8 Up 09:28:55 - 09:58:55 3103
Tulelake 09:44:01 -31.2 Dark Down 29.9 188.4 Low 09:29:01 - 09:59:01 3102
Fall River/Burney 09:43:59 -31.9 Dark Down 30.8 188.5 Up 09:28:59 - 09:58:59 3056
Susanville 09:43:56 -32.2 Dark Down 31.4 189.4 Up 09:28:56 - 09:58:56 3035
Gimple 09:43:56 -32.5 Dark Down 31.7 189.2 Up 09:28:56 - 09:58:56 3017
Greenville 09:43:56 -32.6 Dark Down 31.7 189.1 Up 09:28:56 - 09:58:56 3015
Portola 09:43:54 -32.7 Dark Down 31.9 189.7 Up 09:28:54 - 09:58:54 3006
Quincy 09:43:56 -32.7 Dark Down 31.9 189.1 Up 09:28:56 - 09:58:56 3004
Reno 09:43:52 -32.6 Dark Down 32.1 190.4 Up 09:28:52 - 09:58:52 3003
Yerington 09:43:49 -32.8 Dark Down 32.6 191.2 Up 09:28:49 - 09:58:49 2984
Carson City 09:43:51 -32.9 Dark Down 32.5 190.5 Up 09:28:51 - 09:58:51 2984
Gardnerville 09:43:51 -33.1 Dark Down 32.7 190.5 Up 09:28:51 - 09:58:51 2971
Hawthorne 09:43:46 -33.0 Dark Down 32.9 191.8 Up 09:28:46 - 09:58:46 2967
Tonopah 09:43:40 -32.8 Dark Down 33.1 193.4 Up 09:28:40 - 09:58:40 2965
Lee Vining 09:43:47 -33.7 Dark Down 33.6 191.4 Up 09:28:47 - 09:58:47 2926
Beatty 09:43:37 -33.6 Dark Down 34.2 194.1 Up 09:28:37 - 09:58:37 2906
Indian Springs 09:43:33 -33.3 Dark Down 34.3 195.4 Up 09:28:33 - 09:58:33 2905
Bishop 09:43:44 -33.9 Dark Down 34.0 192.2 Up 09:28:44 - 09:58:44 2905
Henderson 09:43:30 -33.4 Dark Down 34.6 196.2 Up 09:28:30 - 09:58:30 2885
Lone Pine 09:43:42 -34.4 Dark Down 34.7 192.7 Up 09:28:42 - 09:58:42 2866
Patrick 09:43:25 -33.4 Dark Down 35.0 197.6 Up 09:28:25 - 09:58:25 2865
DCO 09:43:21 -33.2 Dark Down 35.1 198.5 Up 09:28:21 - 09:58:21 2858
Searchlight/Boulder City 09:43:28 -33.8 Dark Down 35.2 196.4 Up 09:28:28 - 09:58:28 2851
Kingman/Dolan Springs 09:43:25 -33.6 Dark Down 35.2 197.4 Up 09:28:25 - 09:58:25 2849
Laughlin/Bullhead City 09:43:27 -33.9 Dark Down 35.4 196.9 Up 09:28:27 - 09:58:27 2839
Mohave Valley 09:43:26 -34.1 Dark Down 35.7 196.9 Up 09:28:26 - 09:58:26 2822
Lake Havasu City 09:43:24 -34.3 Dark Down 36.0 197.3 Up 09:28:24 - 09:58:24 2802
Parker 09:43:25 -34.6 Dark Down 36.3 197.4 Up 09:28:25 - 09:58:25 2780
Blythe 09:43:25 -35.1 Dark Down 36.9 197.2 Up 09:28:25 - 09:58:25 2742
CPSLO 09:43:50 -36.6 Dark Down 36.4 189.9 Up 09:28:50 - 09:58:50 2738
Idyllwild 09:43:33 -36.1 Dark Down 37.2 194.7 Up 09:28:33 - 09:58:33 2713
Wildwood 09:43:40 -36.7 Dark Down 37.3 192.5 Up 09:28:40 - 09:58:40 2701
Calipatria 09:43:28 -36.0 Dark Down 37.6 196.2 Up 09:28:28 - 09:58:28 2695
Yuma 09:43:23 -35.9 Dark Down 37.8 197.3 Up 09:28:23 - 09:58:23 2682

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 03HF57, (2018/04/22 09:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.48 134
27Bet Lib      15:17:00.3 -09:22:59  2.6  8.53 114
21Nu Lib       15:06:37.6 -16:15:25  5.2  1.58 113
PPM 229821     15:09:20.3 -18:00:55  8.5  0.31 114
03HF57         15:09:16.3 -17:42:27 15.5       114
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:27:39 UT

Marc W. Buie, Southwest Research Institute

RECON