RECON: TNO occultation with 438028

Event between (438028) 04EH96 and star GA0740:05216442 with event index number of 257533

Geocentric closest approach at 2020/04/25 10:05:37 UTC

J2000 position of star is 14:33:43.0 -15:24:09
Equinox of date position of star is 14:34:45.2 -15:29:04
Stellar brightness G=15.7, use SENSEUP=128
Star is 159 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 31.2 AU from the Sun and 30.2 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 397 seconds.
The 1-sigma cross-track error in the shadow position is 4190 km.
The sky-plane scale is 21881.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 6.7 sec chord
Diameter=64.7 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 438028, (2020/04/25 10:06UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:16.0 -11:16:00  1.0 17.20 142
27Bet Lib      15:18:06.2 -09:27:24  2.6 12.16 167
5 Lib          14:47:05.2 -15:32:38  6.5  2.95 162
PPM 228892     14:31:20.9 -15:20:15  7.5  0.85 159
PPM 228973     14:34:46.9 -15:11:55  9.8  0.29 159
438028         14:34:50.1 -15:29:28 15.7       160
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 2.3 sigma about the mid-time.
The median site spacing is 9.7 km RECON observability=1.0 and success probability=3.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:05:38 -20.5 Dark Down 20.4 208.3 Low 09:50:38 - 10:20:38 6099
Summerland 10:05:38 -20.7 Dark Down 20.5 208.0 Low 09:50:38 - 10:20:38 6093
Penticton 10:05:38 -20.9 Dark Down 20.7 208.2 Low 09:50:38 - 10:20:38 6085
Okanagan Falls 10:05:37 -21.1 Dark Down 20.9 208.2 Low 09:50:37 - 10:20:37 6078
Oliver 10:05:38 -21.2 Dark Down 21.0 208.3 Low 09:50:38 - 10:20:38 6073
Anarchist Mountain Observatory 10:05:36 -21.3 Dark Down 21.1 208.5 Low 09:50:36 - 10:20:36 6069
Oroville 10:05:36 -21.4 Dark Down 21.2 208.4 Low 09:50:36 - 10:20:36 6065
Tonasket 10:05:36 -21.5 Dark Down 21.4 208.5 Low 09:50:36 - 10:20:36 6057
Okanogan 10:05:35 -21.9 Dark Down 21.8 208.4 Low 09:50:35 - 10:20:35 6043
Brewster 10:05:36 -22.2 Dark Down 22.1 208.3 Low 09:50:36 - 10:20:36 6030
Manson/Chelan 10:05:36 -22.5 Dark Down 22.4 207.9 Low 09:50:36 - 10:20:36 6018
Entiat 10:05:35 -22.7 Dark Down 22.6 207.9 Low 09:50:35 - 10:20:35 6009
Wenatchee 10:05:35 -23.0 Dark Down 22.8 207.9 Low 09:50:35 - 10:20:35 5998
Ellensburg 10:05:35 -23.4 Dark Down 23.3 207.7 Low 09:50:35 - 10:20:35 5978
Pasco 10:05:29 -23.5 Dark Down 23.5 209.3 Low 09:50:29 - 10:20:29 5968
Yakima 10:05:34 -23.7 Dark Down 23.6 207.8 Low 09:50:34 - 10:20:34 5962
PNWRO 10:05:28 -23.6 Dark Down 23.6 209.5 Low 09:50:28 - 10:20:28 5961
Toppenish/White Swan 10:05:33 -23.8 Dark Down 23.8 208.0 Low 09:50:33 - 10:20:33 5956
George/Umatilla 10:05:30 -23.8 Dark Down 23.8 209.1 Low 09:50:30 - 10:20:30 5951
Goldendale 10:05:33 -24.5 Dark Down 24.4 207.7 Low 09:50:33 - 10:20:33 5927
The Dalles 10:05:34 -24.8 Dark Down 24.7 207.4 Low 09:50:34 - 10:20:34 5913
Maupin 10:05:33 -25.1 Dark Down 25.1 207.6 Low 09:50:33 - 10:20:33 5896
Madras/Culver 10:05:32 -25.6 Dark Down 25.6 207.6 Low 09:50:32 - 10:20:32 5872
Redmond 10:05:31 -25.9 Dark Down 25.9 207.7 Low 09:50:31 - 10:20:31 5856
Sisters 10:05:32 -26.0 Dark Down 26.0 207.2 Low 09:50:32 - 10:20:32 5851
Bend 10:05:31 -26.1 Dark Down 26.1 207.6 Low 09:50:31 - 10:20:31 5844
Oregon Observatory 10:05:32 -26.3 Dark Down 26.3 207.5 Low 09:50:32 - 10:20:32 5835
Niwot 10:04:35 -21.3 Dark Down 22.4 223.7 Low 09:49:35 - 10:19:35 5832
La Pine/Gilchrist 10:05:30 -26.5 Dark Down 26.5 207.4 Low 09:50:30 - 10:20:30 5824
North Lake 10:05:28 -26.7 Dark Down 26.7 208.2 Low 09:50:28 - 10:20:28 5813
Paisley 10:05:26 -27.0 Dark Down 27.1 208.6 Low 09:50:26 - 10:20:26 5793
Lakeview 10:05:25 -27.3 Dark Down 27.5 209.0 Low 09:50:25 - 10:20:25 5772
Chiloquin 10:05:30 -27.6 Dark Down 27.6 207.3 Low 09:50:30 - 10:20:30 5768
Klamath Falls 10:05:28 -27.9 Dark Down 27.9 207.5 Low 09:50:28 - 10:20:28 5752
Tulelake 10:05:28 -28.0 Dark Down 28.1 207.9 Low 09:50:28 - 10:20:28 5744
Cedarville 10:05:23 -27.8 Dark Down 28.0 209.3 Low 09:50:23 - 10:20:23 5743
Fall River/Burney 10:05:25 -28.7 Dark Down 28.8 208.2 Low 09:50:25 - 10:20:25 5701
Susanville 10:05:21 -28.9 Dark Down 29.1 209.1 Low 09:50:21 - 10:20:21 5680
Gimple 10:05:21 -29.2 Dark Down 29.4 209.0 Low 09:50:21 - 10:20:21 5663
Greenville 10:05:22 -29.2 Dark Down 29.5 208.9 Low 09:50:22 - 10:20:22 5662
Portola 10:05:19 -29.3 Dark Down 29.6 209.4 Low 09:50:19 - 10:20:19 5652
Quincy 10:05:21 -29.4 Dark Down 29.7 208.9 Low 09:50:21 - 10:20:21 5651
Reno 10:05:18 -29.2 Dark Down 29.6 210.2 Low 09:50:18 - 10:20:18 5648
Carson City 10:05:16 -29.5 Dark Down 29.9 210.3 Low 09:50:16 - 10:20:16 5629
Yerington 10:05:15 -29.4 Dark Down 29.8 211.0 Low 09:50:15 - 10:20:15 5629
Gardnerville 10:05:16 -29.7 Dark Down 30.1 210.4 Up 09:50:16 - 10:20:16 5617
Hawthorne 10:05:11 -29.5 Dark Down 30.0 211.6 Low 09:50:11 - 10:20:11 5612
Tonopah 10:05:05 -29.2 Dark Down 29.8 213.2 Low 09:50:05 - 10:20:05 5606
Lee Vining 10:05:11 -30.2 Dark Down 30.7 211.3 Up 09:50:11 - 10:20:11 5574
Bishop 10:05:08 -30.3 Dark Down 30.9 212.2 Up 09:50:08 - 10:20:08 5552
Beatty 10:05:01 -29.9 Dark Down 30.6 214.0 Up 09:50:01 - 10:20:01 5549
Indian Springs 10:04:57 -29.5 Dark Down 30.3 215.1 Up 09:49:57 - 10:19:57 5545
Henderson 10:04:54 -29.6 Dark Down 30.5 216.0 Up 09:49:54 - 10:19:54 5524
Lone Pine 10:05:05 -30.7 Dark Down 31.4 212.8 Up 09:50:05 - 10:20:05 5514
Patrick 10:04:48 -29.4 Dark Down 30.4 217.3 Up 09:49:48 - 10:19:48 5502
DCO 10:04:46 -29.3 Dark Down 30.3 218.1 Up 09:49:46 - 10:19:46 5492
Searchlight/Boulder City 10:04:52 -30.0 Dark Down 30.9 216.3 Up 09:49:52 - 10:19:52 5492
Kingman/Dolan Springs 10:04:49 -29.7 Dark Down 30.7 217.2 Up 09:49:49 - 10:19:49 5486
Laughlin/Bullhead City 10:04:51 -30.0 Dark Down 31.0 216.7 Up 09:49:51 - 10:19:51 5479
Mohave Valley 10:04:50 -30.2 Dark Down 31.2 216.8 Up 09:49:50 - 10:19:50 5463
Lake Havasu City 10:04:48 -30.4 Dark Down 31.4 217.2 Up 09:49:48 - 10:19:48 5442
Parker 10:04:47 -30.6 Dark Down 31.7 217.3 Up 09:49:47 - 10:19:47 5422
CPSLO 10:05:11 -33.0 Dark Down 33.6 210.6 Up 09:50:11 - 10:20:11 5399
Blythe 10:04:47 -31.2 Dark Down 32.2 217.2 Up 09:49:47 - 10:19:47 5386
Idyllwild 10:04:54 -32.2 Dark Down 33.2 215.1 Up 09:49:54 - 10:19:54 5365
Wildwood 10:05:01 -33.0 Dark Down 33.7 213.1 Up 09:50:01 - 10:20:01 5359
Calipatria 10:04:50 -32.0 Dark Down 33.1 216.5 Up 09:49:50 - 10:19:50 5344
Yuma 10:04:45 -31.9 Dark Down 33.0 217.5 Up 09:49:45 - 10:19:45 5329

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 438028, (2020/04/25 10:06UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 17.20 142
27Bet Lib      15:17:00.3 -09:22:59  2.6 12.16 167
5 Lib          14:45:57.7 -15:27:34  6.5  2.95 162
PPM 228892     14:30:13.9 -15:14:53  7.5  0.85 159
PPM 228973     14:33:39.8 -15:06:37  9.8  0.29 159
438028         14:33:43.0 -15:24:09 15.7       159
Positions are for J2000

Event circumstances last updated at 2018/10/26 20:59:50 UT

Marc W. Buie, Southwest Research Institute

RECON