RECON: TNO occultation with 523800

Event between (523800) 17KZ31 and star GA1100:03170314 with event index number of 1341177

Geocentric closest approach at 2023/12/20 09:42:50 UTC

J2000 position of star is 09:15:25.4 +20:20:53
Equinox of date position of star is 09:16:33.5 +20:15:50
Stellar brightness G=15.5, use SENSEUP=128
Star is 129 degrees from the moon. Moon is 57% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 15.8 AU from the Sun and 15.1 AU from the Earth.
The TNO is moving 29.2 km/sec on the sky relative to the star, or, 9.6 arcsec/hr.
The 1-sigma error in the time of the event is 159 seconds.
The 1-sigma cross-track error in the shadow position is 3901 km.
The sky-plane scale is 10954.5 km/arcsec.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.0 km assuming a 5% albedo -- 1.9 sec chord
Diameter=22.4 km assuming a 30% albedo -- 0.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523800, (2023/12/20 09:43UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:38.8 +11:50:57  1.3 15.21 143
PPM 099404     09:14:59.2 +21:10:59  6.1  1.03 128
PPM 099441     09:17:25.8 +19:58:20  8.7  0.31 129
523800         09:16:46.9 +20:14:51 15.5       129
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 25.0 km RECON observability=1.0 and success probability=12.1%
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 09:44:29 -55.7 Dark Down 54.9 139.8 Up 09:30:43 - 09:58:14 1627
Kelowna 09:44:29 -56.1 Dark Down 55.1 139.2 Up 09:30:44 - 09:58:15 1586
Summerland 09:44:29 -56.3 Dark Down 55.2 138.7 Up 09:30:44 - 09:58:15 1556
Penticton 09:44:29 -56.3 Dark Down 55.3 138.8 Up 09:30:44 - 09:58:15 1551
Oliver 09:44:29 -56.5 Dark Down 55.6 138.5 Up 09:30:44 - 09:58:15 1516
Anarchist Mountain Observatory 09:44:28 -56.6 Dark Down 55.8 138.6 Up 09:30:43 - 09:58:14 1503
Tonasket 09:44:29 -56.8 Dark Down 56.0 138.2 Up 09:30:43 - 09:58:14 1470
Okanogan 09:44:29 -57.1 Dark Down 56.2 137.6 Up 09:30:43 - 09:58:14 1433
Brewster 09:44:29 -57.4 Dark Down 56.3 137.0 Up 09:30:44 - 09:58:15 1402
Victoria 09:44:37 -58.8 Dark Down 54.3 132.4 Up 09:30:52 - 09:58:23 1377
Manson/Chelan 09:44:30 -57.7 Dark Down 56.3 136.3 Up 09:30:44 - 09:58:15 1373
Entiat 09:44:30 -57.9 Dark Down 56.4 136.0 Up 09:30:45 - 09:58:16 1350
Wenatchee 09:44:30 -58.1 Dark Down 56.5 135.5 Up 09:30:45 - 09:58:16 1322
Ellensburg 09:44:30 -58.4 Dark Down 56.7 134.8 Up 09:30:45 - 09:58:16 1275
Yakima 09:44:30 -58.7 Dark Down 57.0 134.3 Up 09:30:45 - 09:58:16 1234
Pasco 09:44:27 -58.1 Dark Down 57.9 136.1 Up 09:30:41 - 09:58:12 1229
Toppenish/White Swan 09:44:30 -58.8 Dark Down 57.2 134.3 Up 09:30:44 - 09:58:15 1215
PNWRO 09:44:26 -58.1 Dark Down 58.2 136.1 Up 09:30:41 - 09:58:12 1208
Goldendale 09:44:31 -59.3 Dark Down 57.4 133.1 Up 09:30:45 - 09:58:16 1150
The Dalles 09:44:31 -59.7 Dark Down 57.4 132.3 Up 09:30:46 - 09:58:17 1119
Maupin 09:44:31 -59.9 Dark Down 57.7 131.9 Up 09:30:45 - 09:58:16 1078
Redmond 09:44:31 -60.5 Dark Down 58.2 130.7 Up 09:30:45 - 09:58:16 983
Niwot 09:43:47 -51.5 Dark Down 68.7 155.2 Up 09:30:01 - 09:57:32 981
Sisters 09:44:32 -60.7 Dark Down 58.0 130.2 Up 09:30:46 - 09:58:17 977
SwRI 09:43:47 -51.6 Dark Down 68.7 154.9 Up 09:30:02 - 09:57:33 967
Bend 09:44:31 -60.7 Dark Down 58.3 130.3 Up 09:30:46 - 09:58:17 958
Oregon Observatory 09:44:31 -60.8 Dark Down 58.3 129.9 Up 09:30:46 - 09:58:17 937
La Pine/Gilchrist 09:44:31 -61.0 Dark Down 58.4 129.5 Up 09:30:46 - 09:58:17 915
North Lake 09:44:30 -60.9 Dark Down 59.1 129.8 Up 09:30:44 - 09:58:15 882
Paisley 09:44:29 -61.0 Dark Down 59.6 129.6 Up 09:30:43 - 09:58:14 832
Lakeview 09:44:28 -61.1 Dark Down 60.0 129.2 Up 09:30:42 - 09:58:13 784
Klamath Falls 09:44:31 -62.0 Dark Down 59.2 127.2 Up 09:30:46 - 09:58:17 757
Cedarville 09:44:27 -61.4 Dark Down 60.6 128.6 Up 09:30:41 - 09:58:12 719
Fall River/Burney 09:44:30 -62.4 Dark Down 60.1 126.2 Up 09:30:44 - 09:58:15 641
Susanville 09:44:27 -62.3 Dark Down 60.9 126.3 Up 09:30:42 - 09:58:13 591
Gimple 09:44:28 -62.5 Dark Down 61.0 125.6 Up 09:30:42 - 09:58:13 558
Greenville 09:44:28 -62.6 Dark Down 60.9 125.5 Up 09:30:43 - 09:58:14 556
Quincy 09:44:28 -62.7 Dark Down 61.0 125.2 Up 09:30:43 - 09:58:14 535
Portola 09:44:27 -62.4 Dark Down 61.4 125.7 Up 09:30:41 - 09:58:12 532
Reno 09:44:25 -62.1 Dark Down 62.0 126.2 Up 09:30:39 - 09:58:10 519
Carson City 09:44:25 -62.3 Dark Down 62.2 125.7 Up 09:30:39 - 09:58:10 482
Yerington 09:44:23 -61.9 Dark Down 62.7 126.4 Up 09:30:37 - 09:58:08 476
Gardnerville 09:44:24 -62.3 Dark Down 62.4 125.4 Up 09:30:39 - 09:58:10 457
Hawthorne 09:44:21 -61.7 Dark Down 63.3 126.4 Up 09:30:36 - 09:58:07 440
Tonopah 09:44:17 -60.9 Dark Down 64.5 127.9 Up 09:30:31 - 09:58:02 426
Lee Vining 09:44:22 -62.3 Dark Down 63.3 124.8 Up 09:30:37 - 09:58:08 369
Bishop 09:44:20 -62.0 Dark Down 64.1 124.9 Up 09:30:34 - 09:58:05 323
Beatty 09:44:15 -61.0 Dark Down 65.4 126.7 Up 09:30:30 - 09:58:01 316
Indian Springs 09:44:12 -60.3 Dark Down 66.3 127.9 Up 09:30:26 - 09:57:57 310
Henderson 09:44:09 -59.9 Dark Down 67.1 128.1 Up 09:30:24 - 09:57:55 273
Patrick 09:44:06 -59.2 Dark Down 68.2 128.9 Up 09:30:20 - 09:57:51 239
DCO 09:44:03 -58.7 Dark Down 68.8 129.6 Up 09:30:18 - 09:57:49 228
Searchlight/Boulder City 09:44:09 -60.0 Dark Down 67.5 127.1 Up 09:30:23 - 09:57:54 215
Kingman/Dolan Springs 09:44:06 -59.4 Dark Down 68.2 128.1 Up 09:30:21 - 09:57:52 210
Laughlin/Bullhead City 09:44:07 -59.8 Dark Down 67.9 127.1 Up 09:30:22 - 09:57:53 193
Mohave Valley 09:44:07 -59.9 Dark Down 68.0 126.6 Up 09:30:22 - 09:57:53 165
Lake Havasu City 09:44:06 -59.8 Dark Down 68.4 126.2 Up 09:30:21 - 09:57:52 130
George/Scottsdale 09:43:58 -57.9 Dark Down 70.5 129.3 Up 09:30:13 - 09:57:44 121
Parker 09:44:06 -59.8 Dark Down 68.7 125.6 Up 09:30:20 - 09:57:51 94
CPSLO 09:44:24 -64.5 Dark Down 63.7 118.0 Up 09:30:39 - 09:58:10 50
Blythe 09:44:06 -60.2 Dark Down 68.8 123.9 Up 09:30:21 - 09:57:52 31
Idyllwild 09:44:12 -61.8 Dark Down 67.2 120.7 Up 09:30:27 - 09:57:58 -16
Wildwood 09:44:18 -63.3 Dark Down 65.7 118.6 Up 09:30:32 - 09:58:03 -28
Calipatria 09:44:08 -61.0 Dark Down 68.4 121.3 Up 09:30:23 - 09:57:54 -48
Yuma 09:44:05 -60.4 Dark Down 69.2 121.8 Up 09:30:20 - 09:57:51 -68

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 523800, (2023/12/20 09:43UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 15.21 143
PPM 099404     09:13:37.2 +21:16:59  6.1  1.03 128
PPM 099441     09:16:04.4 +20:04:23  8.7  0.31 129
523800         09:15:25.4 +20:20:53 15.5       129
Positions are for J2000

Event circumstances last updated at 2020/01/15 20:55:17 UT

Marc W. Buie, Southwest Research Institute

RECON