RECON: TNO occultation with 530930

Event between (530930) 11WG157 and star GA1340:02520125 with event index number of 1813732

Geocentric closest approach at 2027/12/22 04:34:36 UTC

J2000 position of star is 04:54:09.7 +45:40:46
Equinox of date position of star is 04:55:40.8 +45:42:42
Stellar brightness G=13.4, use SENSEUP=32
Star is 125 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=24.9

[RECON map]
TNO is 30.5 AU from the Sun and 29.7 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 414 seconds.
The 1-sigma cross-track error in the shadow position is 4024 km.
The sky-plane scale is 21509.2 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=218.8 km assuming a 5% albedo -- 2.5 sec chord
Diameter=89.3 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 

Star training set for 530930, (2027/12/22 04:35UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:31.7 +16:33:49  0.8 29.42 132
34Bet Aur      06:01:34.9 +44:56:49  1.9 11.49 113
PPM 047482     04:56:52.1 +44:06:13  6.0  1.62 125
PPM 047439     04:54:24.7 +45:59:03  7.2  0.41 125
PPM 047471     04:56:20.4 +45:53:59  9.0  0.18 124
530930         04:56:12.5 +45:43:22 13.4       124
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 2.2 sigma about the mid-time.
The median site spacing is 24.1 km RECON observability=1.0 and success probability=8.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 04:36:14 -41.0 Dark Down 64.6 82.2 Up 04:21:14 - 04:51:14 6694
Clarence Fulton 04:36:00 -43.1 Dark Down 67.4 88.7 Up 04:21:00 - 04:51:00 6672
Peachland 04:36:03 -43.0 Dark Down 67.1 87.2 Up 04:21:03 - 04:51:03 6646
Kelowna 04:36:01 -43.2 Dark Down 67.3 87.7 Up 04:21:01 - 04:51:01 6644
Summerland 04:36:03 -43.1 Dark Down 67.2 86.9 Up 04:21:03 - 04:51:03 6629
Penticton 04:36:03 -43.2 Dark Down 67.2 86.8 Up 04:21:03 - 04:51:03 6619
Oliver 04:36:03 -43.3 Dark Down 67.2 86.0 Up 04:21:03 - 04:51:03 6587
Anarchist Mountain Observatory 04:36:04 -43.5 Dark Down 67.3 85.7 Up 04:21:04 - 04:51:04 6564
Tonasket 04:36:05 -43.5 Dark Down 67.3 84.9 Up 04:21:05 - 04:51:05 6540
Okanogan 04:36:06 -43.5 Dark Down 67.1 84.0 Up 04:21:06 - 04:51:06 6516
Brewster 04:36:07 -43.4 Dark Down 67.0 83.3 Up 04:21:07 - 04:51:07 6500
Manson/Chelan 04:36:08 -43.2 Dark Down 66.7 82.6 Up 04:21:08 - 04:51:08 6497
Entiat 04:36:09 -43.2 Dark Down 66.6 82.1 Up 04:21:09 - 04:51:09 6481
Wenatchee 04:36:10 -43.2 Dark Down 66.5 81.4 Up 04:21:10 - 04:51:10 6462
Ellensburg 04:36:12 -43.2 Dark Down 66.3 80.4 Up 04:21:12 - 04:51:12 6435
Yakima 04:36:13 -43.2 Dark Down 66.2 79.5 Up 04:21:13 - 04:51:13 6400
Toppenish/White Swan 04:36:13 -43.4 Dark Down 66.3 79.1 Up 04:21:13 - 04:51:13 6373
Goldendale 04:36:16 -43.2 Dark Down 65.9 77.7 Up 04:21:16 - 04:51:16 6343
The Dalles 04:36:17 -43.0 Dark Down 65.6 77.1 Up 04:21:17 - 04:51:17 6339
Pasco 04:36:11 -44.3 Dark Down 67.2 79.3 Up 04:21:11 - 04:51:11 6307
Maupin 04:36:18 -43.2 Dark Down 65.6 76.2 Up 04:21:18 - 04:51:18 6297
PNWRO 04:36:11 -44.5 Dark Down 67.3 78.8 Up 04:21:11 - 04:51:11 6275
Sisters 04:36:21 -43.0 Dark Down 65.1 74.2 Up 04:21:21 - 04:51:21 6242
Redmond 04:36:20 -43.2 Dark Down 65.3 74.3 Up 04:21:20 - 04:51:20 6221
Bend 04:36:22 -43.2 Dark Down 65.2 73.8 Up 04:21:22 - 04:51:22 6208
Oregon Observatory 04:36:22 -43.1 Dark Down 65.0 73.4 Up 04:21:22 - 04:51:22 6199
La Pine/Gilchrist 04:36:23 -43.1 Dark Down 64.9 72.9 Up 04:21:23 - 04:51:23 6184
North Lake 04:36:23 -43.6 Dark Down 65.2 72.2 Up 04:21:23 - 04:51:23 6116
Klamath Falls 04:36:27 -43.1 Dark Down 64.3 70.0 Up 04:21:27 - 04:51:27 6067
Paisley 04:36:23 -43.9 Dark Down 65.3 71.1 Up 04:21:23 - 04:51:23 6050
Lakeview 04:36:24 -44.2 Dark Down 65.3 70.1 Up 04:21:24 - 04:51:24 5995
Fall River/Burney 04:36:30 -43.5 Dark Down 64.1 67.8 Up 04:21:30 - 04:51:30 5943
Cedarville 04:36:26 -44.4 Dark Down 65.2 68.8 Up 04:21:26 - 04:51:26 5927
Susanville 04:36:29 -44.1 Dark Down 64.4 66.6 Up 04:21:29 - 04:51:29 5850
Greenville 04:36:31 -44.0 Dark Down 64.1 66.1 Up 04:21:31 - 04:51:31 5839
Gimple 04:36:31 -44.0 Dark Down 64.2 66.0 Up 04:21:31 - 04:51:31 5835
Quincy 04:36:31 -44.0 Dark Down 64.0 65.7 Up 04:21:31 - 04:51:31 5821
Portola 04:36:30 -44.3 Dark Down 64.3 65.4 Up 04:21:30 - 04:51:30 5786
Reno 04:36:29 -44.9 Dark Down 64.6 64.9 Up 04:21:29 - 04:51:29 5730
Carson City 04:36:30 -44.9 Dark Down 64.5 64.2 Up 04:21:30 - 04:51:30 5696
Gardnerville 04:36:30 -45.0 Dark Down 64.4 63.8 Up 04:21:30 - 04:51:30 5671
Yerington 04:36:29 -45.4 Dark Down 64.9 63.8 Up 04:21:29 - 04:51:29 5647
Hawthorne 04:36:29 -45.9 Dark Down 65.0 62.8 Up 04:21:29 - 04:51:29 5579
Lee Vining 04:36:31 -45.6 Dark Down 64.4 61.8 Up 04:21:31 - 04:51:31 5551
Tonopah 04:36:26 -47.0 Dark Down 65.8 61.7 Up 04:21:26 - 04:51:26 5468
Bishop 04:36:30 -46.2 Dark Down 64.6 60.6 Up 04:21:30 - 04:51:30 5460
CPSLO 04:36:41 -44.5 Dark Down 62.0 57.6 Up 04:21:41 - 04:51:41 5385
Beatty 04:36:27 -47.5 Dark Down 65.5 59.3 Up 04:21:27 - 04:51:27 5338
Indian Springs 04:36:25 -48.4 Dark Down 66.1 58.4 Up 04:21:25 - 04:51:25 5255
Henderson 04:36:25 -49.0 Dark Down 66.3 57.1 Up 04:21:25 - 04:51:25 5172
Wildwood 04:36:39 -46.2 Dark Down 62.8 55.1 Up 04:21:39 - 04:51:39 5168
Niwot 04:35:45 -55.6 Dark Down 74.9 62.0 Up 04:20:45 - 04:50:45 5156
SwRI 04:35:45 -55.6 Dark Down 74.8 61.8 Up 04:20:45 - 04:50:45 5149
Searchlight/Boulder City 04:36:25 -49.1 Dark Down 66.0 56.0 Up 04:21:25 - 04:51:25 5115
Laughlin/Bullhead City 04:36:25 -49.4 Dark Down 66.1 55.3 Up 04:21:25 - 04:51:25 5070
Patrick 04:36:22 -49.9 Dark Down 66.7 55.4 Up 04:21:22 - 04:51:22 5060
Kingman/Dolan Springs 04:36:23 -49.8 Dark Down 66.4 55.0 Up 04:21:23 - 04:51:23 5048
Mohave Valley 04:36:26 -49.4 Dark Down 65.9 54.7 Up 04:21:26 - 04:51:26 5044
Idyllwild 04:36:35 -47.7 Dark Down 63.8 53.7 Up 04:21:35 - 04:51:35 5039
DCO 04:36:21 -50.5 Dark Down 67.0 54.4 Up 04:21:21 - 04:51:21 4998
Lake Havasu City 04:36:26 -49.6 Dark Down 65.9 53.9 Up 04:21:26 - 04:51:26 4994
Parker 04:36:26 -49.7 Dark Down 65.7 53.3 Up 04:21:26 - 04:51:26 4960
Blythe 04:36:28 -49.5 Dark Down 65.2 52.5 Up 04:21:28 - 04:51:28 4924
Calipatria 04:36:31 -48.7 Dark Down 64.2 52.2 Up 04:21:31 - 04:51:31 4923
Yuma 04:36:30 -49.5 Dark Down 64.6 51.0 Up 04:21:30 - 04:51:30 4839
George/Scottsdale 04:36:20 -51.7 Dark Down 67.0 51.0 Up 04:21:20 - 04:51:20 4805

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 530930, (2027/12/22 04:35UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 29.42 132
34Bet Aur      05:59:31.6 +44:56:51  1.9 11.49 113
PPM 047482     04:54:51.2 +44:03:38  6.0  1.62 125
PPM 047439     04:52:21.6 +45:56:23  7.2  0.41 125
PPM 047471     04:54:17.4 +45:51:22  9.0  0.18 124
530930         04:54:09.7 +45:40:46 13.4       125
Positions are for J2000

Event circumstances last updated at 2020/10/01 21:28:23 UT

Marc W. Buie, Southwest Research Institute

RECON