RECON: TNO occultation with 523983

Event between (523983) 99RY214 and star GA1180:00374168 with event index number of 1591384

Geocentric closest approach at 2021/12/25 02:46:44 UTC

J2000 position of star is 02:37:25.8 +29:49:52
Equinox of date position of star is 02:38:36.8 +29:55:00
Stellar brightness G=12.4, use SENSEUP=16
Star is 111 degrees from the moon. Moon is 70% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 37.2 AU from the Sun and 36.5 AU from the Earth.
The TNO is moving 16.1 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 280 seconds.
The 1-sigma cross-track error in the shadow position is 5315 km.
The sky-plane scale is 26472.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 12.4 sec chord
Diameter=81.5 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523983, (2021/12/25 02:47UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:11.1 +16:33:06  0.8 30.19  90
Hamal          02:08:25.0 +23:33:56  2.0  9.28 120
13 Tri         02:30:06.3 +30:01:46  6.5  1.87 113
PPM 091816     02:37:22.3 +29:29:55  7.4  0.52 112
PPM 091839     02:38:53.7 +29:50:49  9.9  0.09 111
523983         02:38:44.1 +29:55:32 12.4       111
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 17.9 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)
Victoria 02:47:09 -22.7 Dark Down 62.1 122.2 Up 02:32:09 - 03:02:09 10883
Clarence Fulton 02:46:47 -25.6 Dark Down 63.2 130.9 Up 02:31:47 - 03:01:47 10778
Kelowna 02:46:50 -25.4 Dark Down 63.4 130.1 Up 02:31:50 - 03:01:50 10763
Summerland 02:46:51 -25.3 Dark Down 63.5 129.4 Up 02:31:51 - 03:01:51 10756
Penticton 02:46:51 -25.3 Dark Down 63.5 129.5 Up 02:31:51 - 03:01:51 10746
Oliver 02:46:54 -25.3 Dark Down 63.8 128.9 Up 02:31:54 - 03:01:54 10724
Anarchist Mountain Observatory 02:46:54 -25.4 Dark Down 64.0 129.0 Up 02:31:54 - 03:01:54 10704
Tonasket 02:46:56 -25.3 Dark Down 64.1 128.4 Up 02:31:56 - 03:01:56 10688
Okanogan 02:46:58 -25.2 Dark Down 64.3 127.6 Up 02:31:58 - 03:01:58 10674
Manson/Chelan 02:47:02 -24.7 Dark Down 64.3 125.9 Up 02:32:02 - 03:02:02 10674
Brewster 02:47:01 -25.0 Dark Down 64.3 126.8 Up 02:32:01 - 03:02:01 10668
Entiat 02:47:04 -24.7 Dark Down 64.4 125.4 Up 02:32:04 - 03:02:04 10663
Wenatchee 02:47:05 -24.6 Dark Down 64.5 124.9 Up 02:32:05 - 03:02:05 10653
Ellensburg 02:47:09 -24.4 Dark Down 64.6 123.8 Up 02:32:09 - 03:02:09 10638
Yakima 02:47:11 -24.3 Dark Down 64.8 123.1 Up 02:32:11 - 03:02:11 10613
Toppenish/White Swan 02:47:12 -24.4 Dark Down 65.0 123.0 Up 02:32:12 - 03:02:12 10590
The Dalles 02:47:19 -23.7 Dark Down 65.0 120.4 Up 02:32:19 - 03:02:19 10583
Goldendale 02:47:16 -24.0 Dark Down 65.1 121.4 Up 02:32:16 - 03:02:16 10578
Maupin 02:47:20 -23.7 Dark Down 65.2 119.8 Up 02:32:20 - 03:02:20 10550
Sisters 02:47:26 -23.2 Dark Down 65.4 117.4 Up 02:32:26 - 03:02:26 10521
Pasco 02:47:08 -25.2 Dark Down 65.8 124.7 Up 02:32:08 - 03:02:08 10514
Redmond 02:47:26 -23.5 Dark Down 65.6 118.0 Up 02:32:26 - 03:02:26 10497
Bend 02:47:27 -23.4 Dark Down 65.7 117.3 Up 02:32:27 - 03:02:27 10491
Oregon Observatory 02:47:29 -23.3 Dark Down 65.7 116.8 Up 02:32:29 - 03:02:29 10487
PNWRO 02:47:09 -25.3 Dark Down 66.1 124.6 Up 02:32:09 - 03:02:09 10485
La Pine/Gilchrist 02:47:30 -23.2 Dark Down 65.7 116.4 Up 02:32:30 - 03:02:30 10477
North Lake 02:47:31 -23.5 Dark Down 66.3 116.3 Up 02:32:31 - 03:02:31 10414
Klamath Falls 02:47:39 -22.7 Dark Down 66.2 113.1 Up 02:32:39 - 03:02:39 10397
Paisley 02:47:33 -23.7 Dark Down 66.8 115.7 Up 02:32:33 - 03:02:33 10357
Lakeview 02:47:34 -23.8 Dark Down 67.1 114.9 Up 02:32:34 - 03:02:34 10312
Fall River/Burney 02:47:44 -22.8 Dark Down 66.9 111.1 Up 02:32:44 - 03:02:44 10296
Cedarville 02:47:38 -23.8 Dark Down 67.5 113.8 Up 02:32:38 - 03:02:38 10257
Susanville 02:47:45 -23.2 Dark Down 67.6 110.6 Up 02:32:45 - 03:02:45 10209
Greenville 02:47:47 -23.0 Dark Down 67.5 109.7 Up 02:32:47 - 03:02:47 10208
Gimple 02:47:47 -23.0 Dark Down 67.6 109.8 Up 02:32:47 - 03:02:47 10202
Quincy 02:47:48 -22.9 Dark Down 67.6 109.2 Up 02:32:48 - 03:02:48 10193
Portola 02:47:48 -23.2 Dark Down 68.0 109.5 Up 02:32:48 - 03:02:48 10156
Reno 02:47:47 -23.7 Dark Down 68.5 109.7 Up 02:32:47 - 03:02:47 10099
Carson City 02:47:48 -23.6 Dark Down 68.7 108.9 Up 02:32:48 - 03:02:48 10072
Gardnerville 02:47:50 -23.6 Dark Down 68.8 108.4 Up 02:32:50 - 03:02:50 10052
Yerington 02:47:49 -24.1 Dark Down 69.2 109.2 Up 02:32:49 - 03:02:49 10020
Hawthorne 02:47:48 -24.4 Dark Down 69.8 108.7 Up 02:32:48 - 03:02:48 9955
Lee Vining 02:47:53 -23.9 Dark Down 69.6 106.7 Up 02:32:53 - 03:02:53 9945
Bishop 02:47:53 -24.4 Dark Down 70.3 106.0 Up 02:32:53 - 03:02:53 9857
CPSLO 02:47:54 -22.1 Dark Down 68.9 98.2 Up 02:32:54 - 03:02:54 9854
Tonopah 02:47:46 -25.4 Dark Down 71.0 109.4 Up 02:32:46 - 03:02:46 9836
Beatty 02:47:51 -25.5 Dark Down 71.7 106.8 Up 02:32:51 - 03:02:51 9722
Wildwood 02:47:54 -23.5 Dark Down 70.8 96.7 Up 02:32:54 - 03:02:54 9633
Indian Springs 02:47:48 -26.3 Dark Down 72.6 107.2 Up 02:32:48 - 03:02:48 9632
Henderson 02:47:48 -26.8 Dark Down 73.3 106.5 Up 02:32:48 - 03:02:48 9549
Searchlight/Boulder City 02:47:50 -26.7 Dark Down 73.5 104.7 Up 02:32:50 - 03:02:50 9501
Idyllwild 02:47:54 -24.9 Dark Down 72.4 97.3 Up 02:32:54 - 03:02:54 9484
Laughlin/Bullhead City 02:47:51 -26.9 Dark Down 73.8 104.2 Up 02:32:51 - 03:02:51 9457
Mohave Valley 02:47:52 -26.9 Dark Down 73.9 103.3 Up 02:32:52 - 03:02:52 9435
Patrick 02:47:47 -27.5 Dark Down 74.3 105.9 Up 02:32:47 - 03:02:47 9432
Kingman/Dolan Springs 02:47:49 -27.4 Dark Down 74.2 104.9 Up 02:32:49 - 03:02:49 9426
Lake Havasu City 02:47:53 -27.0 Dark Down 74.2 102.2 Up 02:32:53 - 03:02:53 9389
DCO 02:47:46 -28.1 Dark Down 75.0 105.8 Up 02:32:46 - 03:02:46 9364
Calipatria 02:47:54 -25.8 Dark Down 73.4 96.3 Up 02:32:54 - 03:02:54 9361
Parker 02:47:54 -27.0 Dark Down 74.3 101.0 Up 02:32:54 - 03:02:54 9360
Blythe 02:47:54 -26.6 Dark Down 74.1 98.9 Up 02:32:54 - 03:02:54 9338
Niwot 02:46:50 -34.7 Dark Down 77.4 141.8 Up 02:31:50 - 03:01:50 9298
SwRI 02:46:51 -34.6 Dark Down 77.4 141.1 Up 02:31:51 - 03:01:51 9295
Yuma 02:47:54 -26.4 Dark Down 74.2 95.6 Up 02:32:54 - 03:02:54 9270
George/Scottsdale 02:47:47 -28.9 Dark Down 76.3 102.3 Up 02:32:47 - 03:02:47 9174

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 523983, (2021/12/25 02:47UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 30.19  90
Hamal          02:07:10.7 +23:27:42  2.0  9.28 120
13 Tri         02:28:48.4 +29:55:56  6.5  1.87 113
PPM 091816     02:36:04.3 +29:24:14  7.4  0.52 112
PPM 091839     02:37:35.4 +29:45:09  9.9  0.09 111
523983         02:37:25.8 +29:49:52 12.4       111
Positions are for J2000

Event circumstances last updated at 2019/12/03 21:49:00 UT

Marc W. Buie, Southwest Research Institute

RECON