RECON: TNO occultation with 523681

Event between (523681) 14BV64 and star GA0840:03921037 with event index number of 1314131

Geocentric closest approach at 2023/12/31 10:37:41 UTC

J2000 position of star is 10:24:52.0 -04:36:48
Equinox of date position of star is 10:25:53.1 -04:42:58
Stellar brightness G=15.9, use SENSEUP=128
Star is 20 degrees from the moon. Moon is 82% illuminated.
TNO apparent brightness V=26.8

[RECON map]
TNO is 46.8 AU from the Sun and 46.3 AU from the Earth.
The TNO is moving 12.6 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 291 seconds.
The 1-sigma cross-track error in the shadow position is 2558 km.
The sky-plane scale is 33583.0 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=691.9 km assuming a 5% albedo -- 4.8 sec chord
Diameter=282.4 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523681, (2023/12/31 10:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:38.9 +11:50:56  1.3 17.08   4
Alphard        09:28:46.0 -08:45:50  2.0 14.78  26
25 Sex         10:24:39.3 -04:11:46  6.0  0.65  20
PPM 193393     10:25:19.1 -05:02:59  7.5  0.37  21
PPM 193396     10:25:41.9 -04:34:41  9.1  0.18  20
523681         10:26:04.7 -04:44:08 15.9        20
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 3.1 sigma about the mid-time.
The median site spacing is 17.5 km RECON observability=1.0 and success probability=8.5%
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 10:38:01 -49.1 Dark Up 33.3 160.3 Up 10:23:01 - 10:53:01 -3125
Kelowna 10:38:02 -49.3 Dark Up 33.7 160.0 Up 10:23:02 - 10:53:02 -3147
Peachland 10:38:04 -49.6 Dark Up 33.7 159.7 Up 10:23:04 - 10:53:04 -3150
Summerland 10:38:04 -49.6 Dark Up 33.9 159.7 Up 10:23:04 - 10:53:04 -3160
Penticton 10:38:04 -49.5 Dark Up 34.0 159.9 Up 10:23:04 - 10:53:04 -3165
Oliver 10:38:05 -49.7 Dark Up 34.3 159.8 Up 10:23:05 - 10:53:05 -3186
Victoria 10:38:27 -52.2 Dark Up 34.0 155.2 Up 10:23:27 - 10:53:27 -3187
Anarchist Mountain Observatory 10:38:04 -49.6 Dark Up 34.5 160.0 Up 10:23:04 - 10:53:04 -3198
Tonasket 10:38:05 -49.8 Dark Up 34.8 159.8 Up 10:23:05 - 10:53:05 -3217
Okanogan 10:38:08 -50.0 Dark Up 35.1 159.6 Up 10:23:08 - 10:53:08 -3236
Brewster 10:38:09 -50.3 Dark Up 35.3 159.3 Up 10:23:09 - 10:53:09 -3251
Manson/Chelan 10:38:12 -50.6 Dark Up 35.4 158.8 Up 10:23:12 - 10:53:12 -3260
Entiat 10:38:11 -50.7 Dark Up 35.6 158.6 Up 10:23:11 - 10:53:11 -3273
Wenatchee 10:38:14 -50.9 Dark Up 35.8 158.5 Up 10:23:14 - 10:53:14 -3288
Ellensburg 10:38:16 -51.2 Dark Up 36.1 158.1 Up 10:23:16 - 10:53:16 -3312
Yakima 10:38:18 -51.4 Dark Up 36.5 158.0 Up 10:23:18 - 10:53:18 -3338
Toppenish/White Swan 10:38:17 -51.3 Dark Up 36.7 158.1 Up 10:23:17 - 10:53:17 -3354
Pasco 10:38:10 -50.6 Dark Up 37.1 159.6 Up 10:23:10 - 10:53:10 -3375
Goldendale 10:38:21 -51.8 Dark Up 37.1 157.5 Up 10:23:21 - 10:53:21 -3385
PNWRO 10:38:09 -50.5 Dark Up 37.4 159.8 Up 10:23:09 - 10:53:09 -3394
The Dalles 10:38:24 -52.1 Dark Up 37.2 157.0 Up 10:23:24 - 10:53:24 -3396
Maupin 10:38:25 -52.2 Dark Up 37.7 157.0 Up 10:23:25 - 10:53:25 -3425
Sisters 10:38:30 -52.9 Dark Up 38.3 156.1 Up 10:23:30 - 10:53:30 -3478
Redmond 10:38:28 -52.6 Dark Up 38.5 156.6 Up 10:23:28 - 10:53:28 -3484
Bend 10:38:29 -52.8 Dark Up 38.6 156.4 Up 10:23:29 - 10:53:29 -3497
Oregon Observatory 10:38:30 -52.9 Dark Up 38.7 156.2 Up 10:23:30 - 10:53:30 -3507
La Pine/Gilchrist 10:38:32 -53.1 Dark Up 38.9 156.0 Up 10:23:32 - 10:53:32 -3520
North Lake 10:38:28 -52.8 Dark Up 39.5 156.6 Up 10:23:28 - 10:53:28 -3557
Paisley 10:38:28 -52.8 Dark Up 40.1 156.9 Up 10:23:28 - 10:53:28 -3600
Klamath Falls 10:38:37 -53.7 Dark Up 40.2 155.2 Up 10:23:37 - 10:53:37 -3619
Lakeview 10:38:29 -52.8 Dark Up 40.6 157.0 Up 10:23:29 - 10:53:29 -3638
Cedarville 10:38:29 -52.9 Dark Up 41.3 157.0 Up 10:23:29 - 10:53:29 -3687
Fall River/Burney 10:38:37 -53.9 Dark Up 41.4 155.3 Up 10:23:37 - 10:53:37 -3708
Susanville 10:38:35 -53.5 Dark Up 42.2 156.0 Up 10:23:35 - 10:53:35 -3762
Greenville 10:38:37 -53.8 Dark Up 42.3 155.5 Up 10:23:37 - 10:53:37 -3780
Gimple 10:38:37 -53.7 Dark Up 42.3 155.6 Up 10:23:37 - 10:53:37 -3781
Quincy 10:38:38 -53.9 Dark Up 42.5 155.4 Up 10:23:38 - 10:53:38 -3795
Portola 10:38:36 -53.5 Dark Up 42.8 156.0 Up 10:23:36 - 10:53:36 -3809
Reno 10:38:31 -53.1 Dark Up 43.2 156.7 Up 10:23:31 - 10:53:31 -3837
Carson City 10:38:32 -53.2 Dark Up 43.5 156.6 Up 10:23:32 - 10:53:32 -3864
Gardnerville 10:38:34 -53.2 Dark Up 43.8 156.6 Up 10:23:34 - 10:53:34 -3883
Yerington 10:38:30 -52.8 Dark Up 43.9 157.4 Up 10:23:30 - 10:53:30 -3887
Hawthorne 10:38:28 -52.5 Dark Up 44.5 157.9 Up 10:23:28 - 10:53:28 -3929
Lee Vining 10:38:31 -53.0 Dark Up 44.9 157.0 Up 10:23:31 - 10:53:31 -3966
Tonopah 10:38:19 -51.5 Dark Up 45.3 159.6 Up 10:23:19 - 10:53:19 -3983
Niwot 10:36:56 -42.3 Dark Up 45.2 176.4 Up 10:21:56 - 10:51:56 -3989
SwRI 10:36:59 -42.3 Dark Up 45.3 176.3 Up 10:21:59 - 10:51:59 -3996
Bishop 10:38:27 -52.5 Dark Up 45.6 157.8 Up 10:23:27 - 10:53:27 -4022
Beatty 10:38:19 -51.4 Dark Up 46.5 159.8 Up 10:23:19 - 10:53:19 -4080
Indian Springs 10:38:13 -50.6 Dark Up 47.1 161.2 Up 10:23:13 - 10:53:13 -4120
CPSLO 10:38:49 -54.6 Dark Up 46.8 153.9 Up 10:23:49 - 10:53:49 -4157
Henderson 10:38:08 -50.1 Dark Up 47.8 161.9 Up 10:23:08 - 10:53:08 -4173
Searchlight/Boulder City 10:38:10 -50.1 Dark Up 48.4 161.8 Up 10:23:10 - 10:53:10 -4219
Patrick 10:38:03 -49.3 Dark Up 48.7 163.3 Up 10:23:03 - 10:53:03 -4239
Laughlin/Bullhead City 10:38:09 -49.9 Dark Up 48.7 162.2 Up 10:23:09 - 10:53:09 -4249
Kingman/Dolan Springs 10:38:05 -49.4 Dark Up 48.8 163.0 Up 10:23:05 - 10:53:05 -4254
Mohave Valley 10:38:08 -49.9 Dark Up 49.0 162.1 Up 10:23:08 - 10:53:08 -4272
DCO 10:37:59 -48.7 Dark Up 49.1 164.2 Up 10:22:59 - 10:52:59 -4273
Wildwood 10:38:38 -53.2 Dark Up 48.6 156.2 Up 10:23:38 - 10:53:38 -4282
Lake Havasu City 10:38:08 -49.7 Dark Up 49.4 162.4 Up 10:23:08 - 10:53:08 -4308
Idyllwild 10:38:27 -51.7 Dark Up 49.5 158.7 Up 10:23:27 - 10:53:27 -4337
Parker 10:38:08 -49.7 Dark Up 49.8 162.3 Up 10:23:08 - 10:53:08 -4338
Blythe 10:38:12 -50.0 Dark Up 50.2 161.7 Up 10:23:12 - 10:53:12 -4377
Calipatria 10:38:19 -50.8 Dark Up 50.4 160.1 Up 10:23:19 - 10:53:19 -4405
George/Scottsdale 10:37:53 -47.8 Dark Up 50.7 165.7 Up 10:22:53 - 10:52:53 -4408
Yuma 10:38:13 -50.1 Dark Up 51.1 161.3 Up 10:23:13 - 10:53:13 -4454

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 523681, (2023/12/31 10:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 17.08   4
Alphard        09:27:35.2 -08:39:30  2.0 14.78  26
25 Sex         10:23:26.4 -04:04:27  6.0  0.65  20
PPM 193393     10:24:06.4 -04:55:39  7.5  0.37  21
PPM 193396     10:24:29.2 -04:27:21  9.1  0.18  20
523681         10:24:52.0 -04:36:48 15.9        20
Positions are for J2000

Event circumstances last updated at 2020/02/27 21:46:19 UT

Marc W. Buie, Southwest Research Institute

RECON