RECON: TNO occultation with 523899

Event between (523899) 97CV29 and star GA0980:03725588 with event index number of 1590770

Geocentric closest approach at 2023/04/09 06:40:43 UTC

J2000 position of star is 11:48:52.6 +08:24:59
Equinox of date position of star is 11:49:52.8 +08:18:29
Stellar brightness G=15.4, use SENSEUP=128
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 414 seconds.
The 1-sigma cross-track error in the shadow position is 5553 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 CLASSICAL
 
 
 
 
 
 

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  6.16  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 +08:23:25  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 2.2 sigma about the mid-time.
The median site spacing is 17.4 km RECON observability=1.0 and success probability=6.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:41:53 -30.2 Dark Up 48.5 181.7 Up 06:26:53 - 06:56:53 513
Summerland 06:41:53 -30.4 Dark Up 48.8 181.3 Up 06:26:53 - 06:56:53 481
Penticton 06:41:53 -30.5 Dark Up 48.9 181.4 Up 06:26:53 - 06:56:53 480
Okanagan Falls 06:41:48 -30.6 Dark Up 49.1 181.4 Up 06:26:48 - 06:56:48 455
Oliver 06:41:48 -30.8 Dark Up 49.2 181.4 Up 06:26:48 - 06:56:48 443
Anarchist Mountain Observatory 06:41:47 -31.0 Dark Up 49.4 181.7 Up 06:26:47 - 06:56:47 435
Oroville 06:41:47 -31.1 Dark Up 49.5 181.6 Up 06:26:47 - 06:56:47 427
Tonasket 06:41:47 -31.3 Dark Up 49.7 181.6 Up 06:26:47 - 06:56:47 409
Okanogan 06:41:47 -31.5 Dark Up 50.0 181.4 Up 06:26:47 - 06:56:47 378
Brewster 06:41:47 -31.7 Dark Up 50.3 181.1 Up 06:26:47 - 06:56:47 351
Manson/Chelan 06:41:48 -31.8 Dark Up 50.5 180.5 Up 06:26:48 - 06:56:48 325
Wenatchee 06:41:48 -32.2 Dark Up 51.0 180.3 Up 06:26:48 - 06:56:48 282
Ellensburg 06:41:48 -32.5 Dark Up 51.4 179.9 Up 06:26:48 - 06:56:48 242
Pasco 06:41:42 -33.6 Dark Up 52.1 182.2 Up 06:26:42 - 06:56:42 221
Yakima 06:41:47 -32.9 Dark Up 51.8 179.9 Up 06:26:47 - 06:56:47 209
PNWRO 06:41:41 -33.9 Dark Up 52.4 182.5 Up 06:26:41 - 06:56:41 207
Toppenish/White Swan 06:41:47 -33.1 Dark Up 52.0 180.1 Up 06:26:47 - 06:56:47 196
George/Umatilla 06:41:43 -33.9 Dark Up 52.5 181.8 Up 06:26:43 - 06:56:43 187
Goldendale 06:41:47 -33.5 Dark Up 52.6 179.5 Up 06:26:47 - 06:56:47 139
SwRI 06:40:46 -42.2 Dark Up 55.7 207.0 Up 06:25:46 - 06:55:46 127
The Dalles 06:41:48 -33.6 Dark Up 52.8 178.9 Up 06:26:48 - 06:56:48 110
Maupin 06:41:47 -34.0 Dark Up 53.2 179.0 Up 06:26:47 - 06:56:47 78
Madras/Culver 06:41:47 -34.5 Dark Up 53.8 178.9 Up 06:26:47 - 06:56:47 31
Redmond 06:41:46 -34.8 Dark Up 54.1 178.8 Up 06:26:46 - 06:56:46 -1
Sisters 06:41:48 -34.7 Dark Up 54.1 178.2 Up 06:26:48 - 06:56:48 -10
Bend 06:41:46 -35.0 Dark Up 54.4 178.6 Up 06:26:46 - 06:56:46 -23
Oregon Observatory 06:41:47 -35.1 Dark Up 54.5 178.4 Up 06:26:47 - 06:56:47 -41
La Pine/Gilchrist 06:41:46 -35.2 Dark Up 54.7 178.2 Up 06:26:46 - 06:56:46 -60
North Lake 06:41:44 -35.8 Dark Up 55.2 179.3 Up 06:26:44 - 06:56:44 -80
Paisley 06:41:42 -36.4 Dark Up 55.7 179.9 Up 06:26:42 - 06:56:42 -117
Lakeview 06:41:41 -36.9 Dark Up 56.2 180.2 Up 06:26:41 - 06:56:41 -155
Chiloquin 06:41:46 -36.1 Dark Up 55.8 177.6 Up 06:26:46 - 06:56:46 -166
Klamath Falls 06:41:45 -36.5 Dark Up 56.2 177.7 Up 06:26:45 - 06:56:45 -194
Cedarville 06:41:39 -37.6 Dark Up 56.9 180.5 Up 06:26:39 - 06:56:39 -207
Tulelake 06:41:44 -36.8 Dark Up 56.4 178.2 Up 06:26:44 - 06:56:44 -208
Fall River/Burney 06:41:43 -37.6 Dark Up 57.4 178.3 Up 06:26:43 - 06:56:43 -285
Susanville 06:41:39 -38.4 Dark Up 58.0 179.6 Up 06:26:39 - 06:56:39 -319
Gimple 06:41:39 -38.6 Dark Up 58.3 179.2 Up 06:26:39 - 06:56:39 -350
Greenville 06:41:40 -38.6 Dark Up 58.3 179.1 Up 06:26:40 - 06:56:40 -352
Portola 06:41:38 -39.0 Dark Up 58.6 180.0 Up 06:26:38 - 06:56:38 -367
Quincy 06:41:39 -38.8 Dark Up 58.5 179.1 Up 06:26:39 - 06:56:39 -370
Reno 06:41:35 -39.5 Dark Up 58.9 181.2 Up 06:26:35 - 06:56:35 -370
Yerington 06:41:32 -40.2 Dark Up 59.4 182.5 Up 06:26:32 - 06:56:32 -399
Carson City 06:41:34 -39.8 Dark Up 59.2 181.2 Up 06:26:34 - 06:56:34 -402
Tonopah 06:41:23 -41.7 Dark Up 60.2 186.3 Up 06:26:23 - 06:56:23 -421
Gardnerville 06:41:34 -40.1 Dark Up 59.5 181.3 Up 06:26:34 - 06:56:34 -422
Hawthorne 06:41:29 -40.8 Dark Up 59.8 183.5 Up 06:26:29 - 06:56:29 -424
Lee Vining 06:41:30 -41.2 Dark Up 60.4 182.6 Up 06:26:30 - 06:56:30 -490
Indian Springs 06:41:15 -43.5 Dark Up 61.5 189.7 Up 06:26:15 - 06:56:15 -504
Beatty 06:41:20 -42.9 Dark Up 61.3 187.5 Up 06:26:20 - 06:56:20 -510
Bishop 06:41:27 -41.9 Dark Up 61.0 184.1 Up 06:26:27 - 06:56:27 -521
Henderson 06:41:12 -44.2 Dark Up 61.9 191.3 Up 06:26:12 - 06:56:12 -530
Patrick 06:41:07 -45.1 Dark Up 62.4 193.9 Up 06:26:07 - 06:56:07 -549
Kingman/Dolan Springs 06:41:07 -45.3 Dark Up 62.6 193.6 Up 06:26:07 - 06:56:07 -575
Lone Pine 06:41:24 -42.7 Dark Up 61.7 184.9 Up 06:26:24 - 06:56:24 -579
Searchlight/Boulder City 06:41:11 -44.8 Dark Up 62.5 191.7 Up 06:26:11 - 06:56:11 -579
Laughlin/Bullhead City 06:41:09 -45.1 Dark Up 62.7 192.5 Up 06:26:09 - 06:56:09 -595
Mohave Valley 06:41:08 -45.4 Dark Up 63.0 192.6 Up 06:26:08 - 06:56:08 -619
Lake Havasu City 06:41:07 -45.8 Dark Up 63.3 193.3 Up 06:26:07 - 06:56:07 -647
Parker 06:41:06 -46.2 Dark Up 63.7 193.5 Up 06:26:06 - 06:56:06 -678
Blythe 06:41:06 -46.6 Dark Up 64.3 193.1 Up 06:26:06 - 06:56:06 -736
CPSLO 06:41:32 -43.0 Dark Up 63.1 179.5 Up 06:26:32 - 06:56:32 -781
Idyllwild 06:41:14 -45.8 Dark Up 64.5 188.4 Up 06:26:14 - 06:56:14 -797
Calipatria 06:41:09 -46.7 Dark Up 64.9 191.3 Up 06:26:09 - 06:56:09 -814
Yuma 06:41:05 -47.4 Dark Up 65.2 193.5 Up 06:26:05 - 06:56:05 -823
Wildwood 06:41:22 -44.8 Dark Up 64.3 184.1 Up 06:26:22 - 06:56:22 -827

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        10:08:22.0 +11:58:02  1.3 24.97  87
Denebola       11:49:02.9 +14:34:17  2.1  6.16  66
4 Vir          11:47:54.8 +08:14:45  5.2  0.29  63
PPM 158279     11:51:56.5 +08:49:20  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 2019/07/05 22:07:53 UT

Marc W. Buie, Southwest Research Institute

RECON