RECON: TNO occultation with 523789

Event between (523789) 15FN345 and star GA0940:04390718 with event index number of 1152181

Geocentric closest approach at 2021/05/13 07:28:39 UTC

J2000 position of star is 16:33:31.8 +05:55:07
Equinox of date position of star is 16:34:29.0 +05:52:44
Stellar brightness G=14.3, use SENSEUP=64
Star is 152 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=22.1

[RECON map]
TNO is 38.9 AU from the Sun and 38.0 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 160 seconds.
The 1-sigma cross-track error in the shadow position is 2008 km.
The sky-plane scale is 27587.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 14.4 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523789, (2021/05/13 07:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.2 -26:28:39  0.9 32.37 175
1Del Oph       16:15:28.0 -03:44:52  2.7 10.74 162
28 Her         16:33:38.8 +05:28:37  5.5  0.46 153
PPM 162753     16:32:41.7 +05:23:20  8.2  0.68 153
28 Her         16:33:38.8 +05:28:37  5.5  0.46 153
PPM 162815     16:35:42.1 +06:04:13 10.3  0.34 152
523789         16:34:34.7 +05:52:30 14.3       152
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 20.2 km RECON observability=1.0 and success probability=20.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:30:44 -21.4 Dark Down 41.7 147.5 Up 07:16:52 - 07:44:36 1357
Summerland 07:30:45 -21.7 Dark Down 41.8 147.0 Up 07:16:53 - 07:44:37 1326
Penticton 07:30:45 -21.8 Dark Down 41.9 147.1 Up 07:16:53 - 07:44:37 1323
Okanagan Falls 07:30:45 -22.0 Dark Down 42.1 147.0 Up 07:16:53 - 07:44:37 1306
Oliver 07:30:45 -22.1 Dark Down 42.2 146.9 Up 07:16:53 - 07:44:37 1292
Anarchist Mountain Observatory 07:30:44 -22.3 Dark Down 42.4 147.1 Up 07:16:52 - 07:44:36 1281
Oroville 07:30:44 -22.4 Dark Down 42.5 146.9 Up 07:16:52 - 07:44:36 1273
Tonasket 07:30:44 -22.6 Dark Down 42.7 146.8 Up 07:16:52 - 07:44:36 1253
Okanogan 07:30:45 -23.0 Dark Down 42.9 146.5 Up 07:16:53 - 07:44:37 1220
Brewster 07:30:46 -23.2 Dark Down 43.1 146.1 Up 07:16:54 - 07:44:38 1193
Manson/Chelan 07:30:47 -23.4 Dark Down 43.1 145.5 Up 07:16:55 - 07:44:39 1167
Entiat 07:30:47 -23.6 Dark Down 43.2 145.3 Up 07:16:55 - 07:44:39 1146
Wenatchee 07:30:47 -23.9 Dark Down 43.4 145.0 Up 07:16:55 - 07:44:39 1122
Ellensburg 07:30:48 -24.2 Dark Down 43.7 144.5 Up 07:16:56 - 07:44:40 1081
Yakima 07:30:48 -24.6 Dark Down 44.0 144.3 Up 07:16:56 - 07:44:40 1044
Pasco 07:30:44 -25.1 Dark Down 44.8 145.9 Up 07:16:52 - 07:44:36 1041
Toppenish/White Swan 07:30:48 -24.9 Dark Down 44.2 144.4 Up 07:16:56 - 07:44:40 1028
PNWRO 07:30:43 -25.4 Dark Down 45.1 146.1 Up 07:16:51 - 07:44:35 1023
George/Umatilla 07:30:45 -25.4 Dark Down 45.0 145.5 Up 07:16:53 - 07:44:37 1007
Goldendale 07:30:49 -25.4 Dark Down 44.5 143.5 Up 07:16:57 - 07:44:41 969
The Dalles 07:30:50 -25.6 Dark Down 44.5 142.9 Up 07:16:58 - 07:44:42 942
Maupin 07:30:50 -26.0 Dark Down 44.9 142.8 Up 07:16:58 - 07:44:42 906
Madras/Culver 07:30:50 -26.5 Dark Down 45.3 142.4 Up 07:16:58 - 07:44:42 854
Redmond 07:30:51 -26.9 Dark Down 45.6 142.2 Up 07:16:59 - 07:44:43 820
Sisters 07:30:52 -26.8 Dark Down 45.4 141.7 Up 07:17:00 - 07:44:44 815
Niwot 07:30:00 -30.9 Dark Down 54.7 163.0 Up 07:16:08 - 07:43:52 800
Bend 07:30:51 -27.1 Dark Down 45.7 141.8 Up 07:16:59 - 07:44:43 798
SwRI 07:30:00 -31.0 Dark Down 54.8 162.8 Up 07:16:08 - 07:43:52 788
Oregon Observatory 07:30:51 -27.2 Dark Down 45.8 141.6 Up 07:16:59 - 07:44:43 779
La Pine/Gilchrist 07:30:51 -27.4 Dark Down 45.9 141.4 Up 07:16:59 - 07:44:43 759
North Lake 07:30:50 -27.9 Dark Down 46.5 141.8 Up 07:16:58 - 07:44:42 730
Paisley 07:30:49 -28.5 Dark Down 47.1 141.9 Up 07:16:57 - 07:44:41 686
Chiloquin 07:30:53 -28.5 Dark Down 46.6 140.2 Up 07:17:01 - 07:44:45 647
Lakeview 07:30:48 -29.0 Dark Down 47.6 141.9 Up 07:16:56 - 07:44:40 642
Klamath Falls 07:30:52 -28.8 Dark Down 46.9 140.1 Up 07:17:00 - 07:44:44 617
Tulelake 07:30:51 -29.1 Dark Down 47.3 140.2 Up 07:16:59 - 07:44:43 597
Cedarville 07:30:48 -29.7 Dark Down 48.2 141.6 Up 07:16:56 - 07:44:40 584
Fall River/Burney 07:30:51 -30.1 Dark Down 48.0 139.7 Up 07:16:59 - 07:44:43 512
Susanville 07:30:49 -30.8 Dark Down 48.8 140.2 Up 07:16:57 - 07:44:41 467
Gimple 07:30:50 -31.0 Dark Down 49.0 139.7 Up 07:16:58 - 07:44:42 436
Greenville 07:30:50 -31.0 Dark Down 48.9 139.6 Up 07:16:58 - 07:44:42 435
Quincy 07:30:50 -31.2 Dark Down 49.1 139.5 Up 07:16:58 - 07:44:42 415
Portola 07:30:49 -31.4 Dark Down 49.4 140.0 Up 07:16:57 - 07:44:41 413
Reno 07:30:47 -31.7 Dark Down 49.9 140.7 Up 07:16:55 - 07:44:39 402
Carson City 07:30:46 -32.1 Dark Down 50.2 140.4 Up 07:16:54 - 07:44:38 368
Yerington 07:30:45 -32.3 Dark Down 50.7 141.1 Up 07:16:53 - 07:44:37 362
Gardnerville 07:30:47 -32.3 Dark Down 50.4 140.3 Up 07:16:55 - 07:44:39 345
Hawthorne 07:30:43 -32.8 Dark Down 51.3 141.5 Up 07:16:51 - 07:44:35 329
Tonopah 07:30:38 -33.4 Dark Down 52.3 143.1 Up 07:16:46 - 07:44:30 316
Lee Vining 07:30:44 -33.3 Dark Down 51.5 140.4 Up 07:16:52 - 07:44:36 264
Bishop 07:30:42 -34.0 Dark Down 52.3 140.9 Up 07:16:50 - 07:44:34 222
Beatty 07:30:36 -34.6 Dark Down 53.5 142.8 Up 07:16:44 - 07:44:28 214
Indian Springs 07:30:33 -34.9 Dark Down 54.2 144.1 Up 07:16:41 - 07:44:25 208
Henderson 07:30:30 -35.5 Dark Down 55.0 144.7 Up 07:16:38 - 07:44:22 172
Lone Pine 07:30:40 -34.8 Dark Down 53.1 140.7 Up 07:16:48 - 07:44:32 155
Patrick 07:30:26 -36.1 Dark Down 56.0 145.9 Up 07:16:34 - 07:44:18 138
DCO 07:30:24 -36.4 Dark Down 56.6 146.8 Up 07:16:32 - 07:44:16 126
Searchlight/Boulder City 07:30:30 -36.1 Dark Down 55.5 144.3 Up 07:16:38 - 07:44:22 118
Kingman/Dolan Springs 07:30:27 -36.3 Dark Down 56.1 145.4 Up 07:16:35 - 07:44:19 112
Laughlin/Bullhead City 07:30:29 -36.4 Dark Down 55.9 144.6 Up 07:16:37 - 07:44:21 97
Mohave Valley 07:30:28 -36.6 Dark Down 56.1 144.4 Up 07:16:36 - 07:44:20 70
Lake Havasu City 07:30:27 -37.0 Dark Down 56.6 144.4 Up 07:16:35 - 07:44:19 37
Parker 07:30:27 -37.4 Dark Down 56.9 144.2 Up 07:16:35 - 07:44:19 3
CPSLO 07:30:49 -35.8 Dark Down 52.6 136.0 Up 07:16:57 - 07:44:41 -33
Blythe 07:30:28 -37.9 Dark Down 57.1 143.2 Up 07:16:36 - 07:44:20 -56
Idyllwild 07:30:35 -37.7 Dark Down 56.0 140.1 Up 07:16:43 - 07:44:27 -97
Wildwood 07:30:42 -37.2 Dark Down 54.7 137.7 Up 07:16:50 - 07:44:34 -106
Calipatria 07:30:31 -38.4 Dark Down 57.1 141.3 Up 07:16:39 - 07:44:23 -129
Yuma 07:30:27 -38.8 Dark Down 57.8 142.3 Up 07:16:35 - 07:44:19 -149

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 523789, (2021/05/13 07:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.37 175
1Del Oph       16:14:20.7 -03:41:42  2.7 10.74 162
28 Her         16:32:35.7 +05:31:16  5.5  0.46 153
PPM 162753     16:31:38.5 +05:26:00  8.2  0.68 153
28 Her         16:32:35.7 +05:31:16  5.5  0.46 153
PPM 162815     16:34:39.3 +06:06:48 10.3  0.34 152
523789         16:33:31.8 +05:55:07 14.3       152
Positions are for J2000

Event circumstances last updated at 2019/06/08 01:28:31 UT

Marc W. Buie, Southwest Research Institute

RECON