RECON: TNO occultation with 523756

Event between (523756) 14WD509 and star GA1080:00431774 with event index number of 1029216

Geocentric closest approach at 2020/12/30 01:48:16 UTC

J2000 position of star is 03:48:41.7 +19:09:03
Equinox of date position of star is 03:49:54.5 +19:12:51
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 39 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 42.1 AU from the Sun and 41.3 AU from the Earth.
The TNO is moving 18.7 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 80 seconds.
The 1-sigma cross-track error in the shadow position is 1498 km.
The sky-plane scale is 29962.6 km/arcsec.

The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 21.3 sec chord
Diameter=162.5 km assuming a 30% albedo -- 8.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 523756, (2020/12/30 01:48UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.7 +16:32:59  0.8 11.54  29
44Zet Per      03:55:27.4 +31:56:39  2.8 12.79  36
13 Tau         03:43:31.8 +19:45:58  5.7  1.60  40
PPM 119423     03:53:31.4 +18:58:44  8.5  0.89  38
PPM 119372     03:49:28.5 +19:21:38  9.5  0.18  39
523756         03:49:54.5 +19:12:51 16.6        39
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 5.0 sigma about the mid-time.
The median site spacing is 20.8 km RECON observability=0.3 and success probability=1.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 01:50:21 -16.1 AT Up 39.9 109.6 Up 01:43:11 - 01:57:31 6477
Victoria 01:50:37 -13.1 AT Up 37.9 104.6 Up 01:43:27 - 01:57:47 6467
Peachland 01:50:24 -15.7 AT Up 39.8 108.8 Up 01:43:14 - 01:57:34 6454
Kelowna 01:50:23 -15.9 AT Up 39.9 109.2 Up 01:43:13 - 01:57:33 6454
Summerland 01:50:25 -15.7 AT Up 39.9 108.8 Up 01:43:15 - 01:57:35 6441
Penticton 01:50:25 -15.8 AT Up 40.0 108.8 Up 01:43:15 - 01:57:35 6433
Oliver 01:50:26 -15.7 AT Up 40.1 108.6 Up 01:43:16 - 01:57:36 6408
Anarchist Mountain Observatory 01:50:27 -15.8 AT Up 40.3 108.6 Up 01:43:17 - 01:57:37 6390
Tonasket 01:50:29 -15.6 AT Up 40.3 108.3 Up 01:43:19 - 01:57:39 6370
Okanogan 01:50:29 -15.4 AT Up 40.3 107.9 Up 01:43:19 - 01:57:39 6349
Brewster 01:50:32 -15.2 AT Up 40.3 107.5 Up 01:43:22 - 01:57:42 6335
Manson/Chelan 01:50:33 -14.9 AT Up 40.1 107.0 Up 01:43:23 - 01:57:43 6330
Wenatchee 01:50:36 -14.7 AT Up 40.2 106.5 Up 01:43:26 - 01:57:46 6300
Ellensburg 01:50:38 -14.4 AT Up 40.1 106.0 Up 01:43:28 - 01:57:48 6276
Yakima 01:50:40 -14.3 AT Up 40.2 105.6 Up 01:43:30 - 01:57:50 6246
Toppenish/White Swan 01:50:41 -14.3 AT Up 40.4 105.6 Up 01:43:31 - 01:57:51 6225
Goldendale 01:50:44 -13.9 AT Up 40.3 104.8 Up 01:43:34 - 01:57:54 6196
The Dalles 01:50:45 -13.6 AT Up 40.1 104.3 Up 01:43:35 - 01:57:55 6190
Pasco 01:50:37 -15.1 AT Up 41.3 106.6 Up 01:43:27 - 01:57:47 6179
Maupin 01:50:47 -13.5 AT Up 40.3 104.0 Up 01:43:37 - 01:57:57 6155
PNWRO 01:50:38 -15.2 AT Up 41.5 106.6 Up 01:43:28 - 01:57:48 6154
Sisters 01:50:47 -12.9 AT Up 40.1 102.9 Up 01:43:37 - 01:57:57 6104
Redmond 01:50:47 -13.1 AT Up 40.4 103.2 Up 01:43:37 - 01:57:57 6089
Bend 01:50:47 -13.0 AT Up 40.4 102.9 Up 01:43:37 - 01:57:57 6078
Oregon Observatory 01:50:47 -12.8 AT Up 40.3 102.7 Up 01:43:37 - 01:57:57 6069
La Pine/Gilchrist 01:50:47 -12.7 AT Up 40.3 102.4 Up 01:43:37 - 01:57:57 6055
North Lake 01:50:47 -13.0 AT Up 40.8 102.6 Up 01:43:37 - 01:57:57 6003
Klamath Falls 01:50:47 -12.0 AT Up 40.4 101.0 Up 01:43:37 - 01:57:57 5954
Paisley 01:50:47 -13.0 AT Up 41.2 102.4 Up 01:43:37 - 01:57:57 5949
Lakeview 01:50:47 -13.0 AT Up 41.5 102.1 Up 01:43:37 - 01:57:57 5904
Fall River/Burney 01:50:47 -11.9 NT Up 40.9 100.3 Up 01:43:37 - 01:57:57 5851
Cedarville 01:50:47 -12.9 AT Up 41.7 101.7 Up 01:43:37 - 01:57:57 5847
Susanville 01:50:47 -12.2 AT Up 41.6 100.3 Up 01:43:37 - 01:57:57 5777
Greenville 01:50:47 -11.9 NT Up 41.4 99.9 Up 01:43:37 - 01:57:57 5766
Gimple 01:50:47 -11.9 NT Up 41.5 99.9 Up 01:43:37 - 01:57:57 5763
Quincy 01:50:47 -11.8 NT Up 41.4 99.7 Up 01:43:37 - 01:57:57 5751
Portola 01:50:47 -12.1 AT Up 41.8 100.0 Up 01:43:37 - 01:57:57 5724
Reno 01:50:47 -12.5 AT Up 42.4 100.2 Up 01:43:37 - 01:57:57 5681
Carson City 01:50:47 -12.4 AT Up 42.5 99.9 Up 01:43:37 - 01:57:57 5652
Gardnerville 01:50:47 -12.3 AT Up 42.5 99.7 Up 01:43:37 - 01:57:57 5631
Yerington 01:50:47 -12.8 AT Up 43.0 100.2 Up 01:43:37 - 01:57:57 5614
Hawthorne 01:50:47 -13.0 AT Up 43.5 100.2 Up 01:43:37 - 01:57:57 5558
Lee Vining 01:51:11 -12.5 AT Up 43.3 99.4 Up 01:44:01 - 01:58:21 5513
Tonopah 01:50:47 -13.9 AT Up 44.6 100.8 Up 01:43:37 - 01:57:57 5470
Bishop 01:51:11 -12.9 AT Up 43.9 99.3 Up 01:44:01 - 01:58:21 5437
Beatty 01:50:47 -13.9 AT Up 45.2 100.0 Up 01:43:37 - 01:57:57 5358
CPSLO 01:51:24 -10.5 NT Up 42.4 95.9 Up 01:44:14 - 01:58:34 5335
Indian Springs 01:50:47 -14.6 AT Up 46.1 100.5 Up 01:43:37 - 01:57:57 5291
Dunrhomin 01:50:19 -23.4 Dark Up 52.8 113.9 Up 01:43:09 - 01:57:29 5273
Henderson 01:50:47 -15.0 AT Up 46.8 100.5 Up 01:43:37 - 01:57:57 5221
Wildwood 01:51:24 -11.7 NT Up 44.2 96.1 Up 01:44:14 - 01:58:34 5158
Laughlin/Bullhead City 01:50:47 -15.0 AT Up 47.2 99.8 Up 01:43:37 - 01:57:57 5132
Patrick 01:50:47 -15.6 AT Up 47.8 100.6 Up 01:43:37 - 01:57:57 5127
Kingman/Dolan Springs 01:50:47 -15.4 AT Up 47.7 100.2 Up 01:43:37 - 01:57:57 5115
Mohave Valley 01:50:47 -14.9 AT Up 47.3 99.6 Up 01:43:37 - 01:57:57 5109
Lake Havasu City 01:50:47 -15.0 AT Up 47.6 99.3 Up 01:43:37 - 01:57:57 5066
Idyllwild 01:51:18 -13.0 AT Up 45.8 97.0 Up 01:44:08 - 01:58:28 5062
Parker 01:51:10 -15.0 AT Up 47.7 99.0 Up 01:44:00 - 01:58:20 5015
Blythe 01:51:12 -14.6 AT Up 47.6 98.2 Up 01:44:02 - 01:58:22 4978
Calipatria 01:51:17 -13.7 AT Up 46.9 97.1 Up 01:44:07 - 01:58:27 4965
George/Scottsdale 01:50:47 -16.7 AT Up 49.7 100.2 Up 01:43:37 - 01:57:57 4905
Yuma 01:51:16 -14.3 AT Up 47.7 97.2 Up 01:44:06 - 01:58:26 4895

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 523756, (2020/12/30 01:48UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 11.54  29
44Zet Per      03:54:07.9 +31:53:01  2.8 12.79  36
13 Tau         03:42:18.9 +19:42:01  5.7  1.60  40
PPM 119423     03:52:18.6 +18:55:03  8.5  0.89  38
PPM 119372     03:48:15.7 +19:17:50  9.5  0.18  39
523756         03:48:41.7 +19:09:03 16.6        39
Positions are for J2000

Event circumstances last updated at 2020/12/29 22:22:53 UT

Marc W. Buie, Southwest Research Institute

RECON