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 09:46:47 UTC

J2000 position of star is 15:09:16.3 -17:42:27
Equinox of date position of star is 15:10:17.7 -17:46:32
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 285 seconds.
The 1-sigma cross-track error in the shadow position is 4216 km.
The sky-plane scale is 24235.1 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 09:47UT)
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 3.2 sigma about the mid-time.
The median site spacing is 10.8 km RECON observability=1.0 and success probability=4.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:47:22 -24.1 Dark Down 22.7 190.8 Low 09:32:22 - 10:02:22 4045
Tonasket 09:47:22 -24.3 Dark Down 22.9 190.9 Low 09:32:22 - 10:02:22 4036
Okanogan 09:47:22 -24.6 Dark Down 23.3 190.7 Low 09:32:22 - 10:02:22 4020
Brewster 09:47:22 -24.9 Dark Down 23.6 190.5 Low 09:32:22 - 10:02:22 4006
Manson/Chelan 09:47:23 -25.2 Dark Down 23.8 190.2 Low 09:32:23 - 10:02:23 3992
Entiat 09:47:23 -25.4 Dark Down 24.0 190.1 Low 09:32:23 - 10:02:23 3982
Wenatchee 09:47:23 -25.7 Dark Down 24.3 190.0 Low 09:32:23 - 10:02:23 3970
Ellensburg 09:47:23 -26.1 Dark Down 24.7 189.9 Low 09:32:23 - 10:02:23 3949
Pasco 09:47:18 -26.3 Dark Down 25.3 191.4 Low 09:32:18 - 10:02:18 3939
PNWRO 09:47:17 -26.4 Dark Down 25.5 191.6 Low 09:32:17 - 10:02:17 3932
Yakima 09:47:23 -26.5 Dark Down 25.1 189.9 Low 09:32:23 - 10:02:23 3931
Toppenish/White Swan 09:47:22 -26.6 Dark Down 25.3 190.1 Low 09:32:22 - 10:02:22 3924
George/Umatilla 09:47:18 -26.7 Dark Down 25.7 191.2 Low 09:32:18 - 10:02:18 3921
Goldendale 09:47:23 -27.3 Dark Down 25.9 189.7 Low 09:32:23 - 10:02:23 3893
The Dalles 09:47:24 -27.6 Dark Down 26.2 189.3 Low 09:32:24 - 10:02:24 3877
Maupin 09:47:23 -27.9 Dark Down 26.6 189.4 Low 09:32:23 - 10:02:23 3859
Madras/Culver 09:47:23 -28.4 Dark Down 27.1 189.4 Low 09:32:23 - 10:02:23 3833
Niwot 09:46:22 -24.9 Dark Down 27.8 206.6 Low 09:31:22 - 10:01:22 3829
Redmond 09:47:22 -28.7 Dark Down 27.5 189.4 Low 09:32:22 - 10:02:22 3816
Sisters 09:47:24 -28.8 Dark Down 27.5 189.0 Low 09:32:24 - 10:02:24 3810
Bend 09:47:22 -29.0 Dark Down 27.7 189.3 Low 09:32:22 - 10:02:22 3803
Oregon Observatory 09:47:23 -29.2 Dark Down 27.9 189.2 Low 09:32:23 - 10:02:23 3792
La Pine/Gilchrist 09:47:23 -29.4 Dark Down 28.1 189.1 Low 09:32:23 - 10:02:23 3781
North Lake 09:47:21 -29.5 Dark Down 28.5 189.8 Low 09:32:21 - 10:02:21 3770
Paisley 09:47:19 -29.9 Dark Down 29.0 190.2 Low 09:32:19 - 10:02:19 3749
Lakeview 09:47:17 -30.2 Dark Down 29.5 190.5 Low 09:32:17 - 10:02:17 3727
Chiloquin 09:47:23 -30.5 Dark Down 29.3 188.8 Low 09:32:23 - 10:02:23 3720
Klamath Falls 09:47:23 -30.7 Dark Down 29.6 188.9 Low 09:32:23 - 10:02:23 3704
Cedarville 09:47:16 -30.7 Dark Down 30.1 190.7 Up 09:32:16 - 10:02:16 3696
Tulelake 09:47:21 -30.9 Dark Down 29.8 189.3 Low 09:32:21 - 10:02:21 3695
Fall River/Burney 09:47:20 -31.6 Dark Down 30.7 189.5 Up 09:32:20 - 10:02:20 3649
Susanville 09:47:17 -31.9 Dark Down 31.2 190.3 Up 09:32:17 - 10:02:17 3629
Gimple 09:47:17 -32.2 Dark Down 31.5 190.1 Up 09:32:17 - 10:02:17 3610
Greenville 09:47:17 -32.2 Dark Down 31.6 190.0 Up 09:32:17 - 10:02:17 3609
Portola 09:47:15 -32.3 Dark Down 31.8 190.6 Up 09:32:15 - 10:02:15 3599
Quincy 09:47:17 -32.4 Dark Down 31.8 190.1 Up 09:32:17 - 10:02:17 3598
Reno 09:47:12 -32.3 Dark Down 32.0 191.3 Up 09:32:12 - 10:02:12 3596
Yerington 09:47:10 -32.5 Dark Down 32.4 192.1 Up 09:32:10 - 10:02:10 3577
Carson City 09:47:11 -32.6 Dark Down 32.3 191.4 Up 09:32:11 - 10:02:11 3577
Gardnerville 09:47:11 -32.8 Dark Down 32.6 191.5 Up 09:32:11 - 10:02:11 3564
Hawthorne 09:47:07 -32.7 Dark Down 32.8 192.8 Up 09:32:07 - 10:02:07 3560
Tonopah 09:47:01 -32.4 Dark Down 33.0 194.4 Up 09:32:01 - 10:02:01 3558
Lee Vining 09:47:08 -33.3 Dark Down 33.4 192.3 Up 09:32:08 - 10:02:08 3520
Beatty 09:46:58 -33.2 Dark Down 34.0 195.1 Up 09:31:58 - 10:01:58 3499
Bishop 09:47:05 -33.5 Dark Down 33.9 193.2 Up 09:32:05 - 10:02:05 3498
Indian Springs 09:46:54 -32.9 Dark Down 34.1 196.3 Up 09:31:54 - 10:01:54 3497
Henderson 09:46:50 -33.0 Dark Down 34.5 197.2 Up 09:31:50 - 10:01:50 3477
Lone Pine 09:47:02 -34.0 Dark Down 34.6 193.7 Up 09:32:02 - 10:02:02 3459
Patrick 09:46:45 -32.9 Dark Down 34.8 198.5 Up 09:31:45 - 10:01:45 3457
DCO 09:46:42 -32.8 Dark Down 34.9 199.4 Up 09:31:42 - 10:01:42 3449
Searchlight/Boulder City 09:46:49 -33.4 Dark Down 35.0 197.4 Up 09:31:49 - 10:01:49 3443
Kingman/Dolan Springs 09:46:45 -33.2 Dark Down 35.0 198.4 Up 09:31:45 - 10:01:45 3440
Laughlin/Bullhead City 09:46:48 -33.5 Dark Down 35.2 197.8 Up 09:31:48 - 10:01:48 3431
Mohave Valley 09:46:47 -33.7 Dark Down 35.4 197.9 Up 09:31:47 - 10:01:47 3414
Lake Havasu City 09:46:45 -33.9 Dark Down 35.8 198.2 Up 09:31:45 - 10:01:45 3393
Parker 09:46:45 -34.1 Dark Down 36.1 198.3 Up 09:31:45 - 10:01:45 3372
Blythe 09:46:45 -34.7 Dark Down 36.7 198.1 Up 09:31:45 - 10:01:45 3334
CPSLO 09:47:10 -36.2 Dark Down 36.3 190.9 Up 09:32:10 - 10:02:10 3332
Idyllwild 09:46:53 -35.7 Dark Down 37.1 195.7 Up 09:31:53 - 10:01:53 3306
Wildwood 09:47:01 -36.3 Dark Down 37.1 193.5 Up 09:32:01 - 10:02:01 3295
Calipatria 09:46:48 -35.6 Dark Down 37.4 197.2 Up 09:31:48 - 10:01:48 3287
Yuma 09:46:44 -35.4 Dark Down 37.6 198.3 Up 09:31:44 - 10:01:44 3274

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 09:47UT)
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 2018/02/06 17:39:35 UT

Marc W. Buie, Southwest Research Institute

RECON