RECON: TNO occultation with 523899

Event between (523899) 97CV29 and star GA0980:03725588 with event index number of 2594003

Geocentric closest approach at 2023/04/09 06:40:59 UTC

J2000 position of star is 11:48:52.6 +08:24:59
Equinox of date position of star is 11:50:01.1 +08:17:35
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 63 degrees from the moon. Moon is 90% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 40.3 AU from the Sun and 39.4 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 391 seconds.
The 1-sigma cross-track error in the shadow position is 5080 km.
The sky-plane scale is 28599.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 9.3 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 523899, (2023/04/09 06:41UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:36.6 +11:51:09  1.3 24.97  87
Denebola       11:50:14.8 +14:26:31  2.1  6.15  66
4 Vir          11:49:06.6 +08:06:59  5.2  0.29  63
PPM 158279     11:53:08.2 +08:41:33  8.0  0.86  62
PPM 158240     11:50:50.6 +08:23:24  9.9  0.22  63
523899         11:50:04.3 +08:17:14 15.4        63
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 18.7 km RECON observability=1.0 and success probability=10.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:41:30 -30.2 Dark Up 44.7 200.4 Up 06:26:30 - 06:56:30 1940
Kamloops 06:42:09 -29.2 Dark Up 47.7 180.3 Up 06:27:09 - 06:57:09 1468
Kelowna 06:42:04 -30.2 Dark Up 48.5 181.6 Up 06:27:04 - 06:57:04 1428
Peachland 06:42:09 -30.2 Dark Up 48.7 181.2 Up 06:27:09 - 06:57:09 1414
Summerland 06:42:04 -30.4 Dark Up 48.8 181.3 Up 06:27:04 - 06:57:04 1402
Penticton 06:42:04 -30.5 Dark Up 48.9 181.5 Up 06:27:04 - 06:57:04 1400
Oliver 06:42:04 -30.8 Dark Up 49.2 181.5 Up 06:27:04 - 06:57:04 1372
Anarchist Mountain Observatory 06:42:03 -31.0 Dark Up 49.4 181.8 Up 06:27:03 - 06:57:03 1364
Tonasket 06:42:03 -31.3 Dark Up 49.7 181.7 Up 06:27:03 - 06:57:03 1338
Okanogan 06:42:03 -31.6 Dark Up 50.0 181.5 Up 06:27:03 - 06:57:03 1307
Brewster 06:42:03 -31.8 Dark Up 50.3 181.2 Up 06:27:03 - 06:57:03 1281
Manson/Chelan 06:42:04 -31.9 Dark Up 50.5 180.6 Up 06:27:04 - 06:57:04 1254
Victoria 06:42:14 -30.4 Dark Up 49.8 175.7 Up 06:27:14 - 06:57:14 1220
Wenatchee 06:42:04 -32.2 Dark Up 51.0 180.4 Up 06:27:04 - 06:57:04 1211
Ellensburg 06:42:04 -32.6 Dark Up 51.4 180.0 Up 06:27:04 - 06:57:04 1172
Yakima 06:42:03 -32.9 Dark Up 51.8 180.0 Up 06:27:03 - 06:57:03 1138
PNWRO 06:41:57 -33.9 Dark Up 52.4 182.7 Up 06:26:57 - 06:56:57 1137
Toppenish/White Swan 06:42:02 -33.2 Dark Up 52.0 180.3 Up 06:27:02 - 06:57:02 1125
Dunrhomin 06:41:02 -42.0 Dark Up 55.4 207.1 Up 06:26:02 - 06:56:02 1081
Goldendale 06:42:03 -33.5 Dark Up 52.6 179.6 Up 06:27:03 - 06:57:03 1068
CU-SBO 06:41:01 -42.2 Dark Up 55.7 207.1 Up 06:26:01 - 06:56:01 1058
The Dalles 06:42:04 -33.6 Dark Up 52.8 179.0 Up 06:27:04 - 06:57:04 1039
Maupin 06:42:03 -34.0 Dark Up 53.2 179.1 Up 06:27:03 - 06:57:03 1008
Sisters 06:42:03 -34.7 Dark Up 54.1 178.3 Up 06:27:03 - 06:57:03 920
Bend 06:42:02 -35.0 Dark Up 54.4 178.7 Up 06:27:02 - 06:57:02 907
Oregon Observatory 06:42:02 -35.1 Dark Up 54.5 178.5 Up 06:27:02 - 06:57:02 889
North Lake 06:42:00 -35.8 Dark Up 55.2 179.4 Up 06:27:00 - 06:57:00 850
Lakeview 06:41:56 -37.0 Dark Up 56.2 180.3 Up 06:26:56 - 06:56:56 775
Chiloquin 06:42:02 -36.1 Dark Up 55.8 177.7 Up 06:27:02 - 06:57:02 764
Klamath Falls 06:42:01 -36.5 Dark Up 56.2 177.8 Up 06:27:01 - 06:57:01 737
Cedarville 06:41:55 -37.6 Dark Up 56.9 180.6 Up 06:26:55 - 06:56:55 723
Fall River/Burney 06:41:58 -37.6 Dark Up 57.4 178.4 Up 06:26:58 - 06:56:58 645
Susanville 06:41:55 -38.5 Dark Up 58.0 179.7 Up 06:26:55 - 06:56:55 611
Gimple 06:41:55 -38.6 Dark Up 58.3 179.3 Up 06:26:55 - 06:56:55 580
Greenville 06:41:56 -38.6 Dark Up 58.3 179.2 Up 06:26:56 - 06:56:56 578
Portola 06:41:53 -39.1 Dark Up 58.6 180.1 Up 06:26:53 - 06:56:53 564
Quincy 06:41:55 -38.8 Dark Up 58.5 179.2 Up 06:26:55 - 06:56:55 560
Reno 06:41:51 -39.5 Dark Up 58.9 181.3 Up 06:26:51 - 06:56:51 560
Yerington 06:41:47 -40.2 Dark Up 59.4 182.6 Up 06:26:47 - 06:56:47 531
Carson City 06:41:50 -39.8 Dark Up 59.2 181.4 Up 06:26:50 - 06:56:50 529
Tonopah 06:41:39 -41.7 Dark Up 60.2 186.5 Up 06:26:39 - 06:56:39 509
Gardnerville 06:41:50 -40.1 Dark Up 59.5 181.5 Up 06:26:50 - 06:56:50 508
Hawthorne 06:41:45 -40.8 Dark Up 59.8 183.6 Up 06:26:45 - 06:56:45 506
Lee Vining 06:41:46 -41.2 Dark Up 60.4 182.7 Up 06:26:46 - 06:56:46 441
Indian Springs 06:41:31 -43.5 Dark Up 61.5 189.9 Up 06:26:31 - 06:56:31 426
Beatty 06:41:36 -42.9 Dark Up 61.3 187.6 Up 06:26:36 - 06:56:36 420
Bishop 06:41:42 -42.0 Dark Up 61.0 184.2 Up 06:26:42 - 06:56:42 409
Henderson 06:41:28 -44.2 Dark Up 61.9 191.5 Up 06:26:28 - 06:56:28 400
Patrick 06:41:22 -45.1 Dark Up 62.4 194.0 Up 06:26:22 - 06:56:22 381
Kingman/Dolan Springs 06:41:23 -45.3 Dark Up 62.6 193.7 Up 06:26:23 - 06:56:23 355
Laughlin/Bullhead City 06:41:24 -45.2 Dark Up 62.7 192.6 Up 06:26:24 - 06:56:24 335
Mohave Valley 06:41:24 -45.4 Dark Up 63.0 192.8 Up 06:26:24 - 06:56:24 311
George/Scottsdale 06:41:12 -47.2 Dark Up 63.5 199.1 Up 06:26:12 - 06:56:12 296
Lake Havasu City 06:41:22 -45.9 Dark Up 63.3 193.5 Up 06:26:22 - 06:56:22 283
Parker 06:41:22 -46.2 Dark Up 63.7 193.7 Up 06:26:22 - 06:56:22 252
Idyllwild 06:41:30 -45.8 Dark Up 64.5 188.5 Up 06:26:30 - 06:56:30 133
Calipatria 06:41:24 -46.8 Dark Up 64.9 191.4 Up 06:26:24 - 06:56:24 116
Yuma 06:41:20 -47.4 Dark Up 65.1 193.6 Up 06:26:20 - 06:56:20 107
Wildwood 06:41:38 -44.8 Dark Up 64.3 184.2 Up 06:26:38 - 06:56:38 103

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 523899, (2023/04/09 06:41UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 24.97  87
Denebola       11:49:02.8 +14:34:17  2.1  6.15  66
4 Vir          11:47:54.8 +08:14:45  5.2  0.29  63
PPM 158279     11:51:56.5 +08:49:19  8.0  0.86  62
PPM 158240     11:49:38.8 +08:31:10  9.9  0.22  63
523899         11:48:52.6 +08:24:59 15.4        63
Positions are for J2000

Event circumstances last updated at 2022/03/19 00:52:26 UT

Marc W. Buie, Southwest Research Institute

RECON