RECON: TNO occultation with 10TH

Event between 10TH and star GA1020:02688009 with event index number of 1465709

Geocentric closest approach at 2025/12/06 05:33:30 UTC

J2000 position of star is 07:12:44.4 +13:28:14
Equinox of date position of star is 07:13:52.0 +13:26:08
Stellar brightness G=14.1, use SENSEUP=64
Star is 21 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 21.0 AU from the Sun and 20.2 AU from the Earth.
The TNO is moving 20.0 km/sec on the sky relative to the star, or, 4.9 arcsec/hr.
The 1-sigma error in the time of the event is 143 seconds.
The 1-sigma cross-track error in the shadow position is 1317 km.
The sky-plane scale is 14666.3 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=81.7 km assuming a 5% albedo -- 4.1 sec chord
Diameter=33.3 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 10TH, (2025/12/06 05:34UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.2 +27:57:41  1.1 16.41  21
Alhena         06:39:12.6 +16:22:30  1.9  8.95  13
PPM 123740     07:15:59.3 +12:04:09  5.6  1.42  22
PPM 123712     07:14:51.5 +13:43:01  7.6  0.33  21
PPM 123691     07:13:56.1 +13:24:47  9.8  0.07  21
10TH           07:14:11.9 +13:25:30 14.1        21
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 22.3 km RECON observability=1.0 and success probability=35.5%
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 05:37:06 -52.3 Dark Up 24.4 98.3 Low 05:24:43 - 05:49:29 1147
Kelowna 05:37:08 -52.4 Dark Up 24.3 98.0 Low 05:24:45 - 05:49:31 1116
Summerland 05:37:09 -52.5 Dark Up 24.2 97.7 Low 05:24:46 - 05:49:32 1095
Penticton 05:37:09 -52.6 Dark Up 24.3 97.8 Low 05:24:46 - 05:49:32 1088
Oliver 05:37:10 -52.8 Dark Up 24.4 97.6 Low 05:24:47 - 05:49:33 1057
Victoria 05:37:18 -50.9 Dark Up 21.9 94.4 Low 05:24:55 - 05:49:41 1049
Anarchist Mountain Observatory 05:37:11 -53.0 Dark Up 24.5 97.7 Low 05:24:48 - 05:49:34 1040
Tonasket 05:37:12 -53.1 Dark Up 24.5 97.5 Low 05:24:49 - 05:49:35 1014
Okanogan 05:37:13 -53.2 Dark Up 24.5 97.3 Low 05:24:50 - 05:49:36 986
Brewster 05:37:14 -53.2 Dark Up 24.4 97.0 Low 05:24:51 - 05:49:37 964
Manson/Chelan 05:37:15 -53.1 Dark Up 24.1 96.6 Low 05:24:52 - 05:49:38 951
Entiat 05:37:16 -53.2 Dark Up 24.1 96.5 Low 05:24:53 - 05:49:39 932
Wenatchee 05:37:17 -53.3 Dark Up 24.1 96.3 Low 05:24:54 - 05:49:40 911
Ellensburg 05:37:19 -53.4 Dark Up 24.0 95.9 Low 05:24:56 - 05:49:42 877
Yakima 05:37:20 -53.6 Dark Up 24.0 95.7 Low 05:24:57 - 05:49:43 840
Toppenish/White Swan 05:37:21 -53.8 Dark Up 24.2 95.8 Low 05:24:58 - 05:49:44 819
Pasco 05:37:19 -54.6 Dark Up 25.0 96.7 Low 05:24:56 - 05:49:42 791
Goldendale 05:37:23 -53.8 Dark Up 23.9 95.2 Low 05:25:00 - 05:49:46 774
PNWRO 05:37:20 -54.9 Dark Up 25.2 96.7 Low 05:24:57 - 05:49:43 766
The Dalles 05:37:24 -53.7 Dark Up 23.7 94.8 Low 05:25:01 - 05:49:47 759
Maupin 05:37:25 -53.9 Dark Up 23.8 94.7 Low 05:25:02 - 05:49:48 719
Sisters 05:37:29 -54.0 Dark Up 23.5 94.0 Low 05:25:06 - 05:49:52 646
Redmond 05:37:28 -54.3 Dark Up 23.8 94.3 Low 05:25:05 - 05:49:51 638
Bend 05:37:29 -54.3 Dark Up 23.7 94.1 Low 05:25:06 - 05:49:52 620
Oregon Observatory 05:37:30 -54.3 Dark Up 23.7 93.9 Low 05:25:07 - 05:49:53 606
La Pine/Gilchrist 05:37:30 -54.3 Dark Up 23.6 93.8 Low 05:25:07 - 05:49:53 588
North Lake 05:37:31 -54.9 Dark Up 24.1 94.0 Low 05:25:08 - 05:49:54 539
Paisley 05:37:32 -55.4 Dark Up 24.4 94.0 Low 05:25:09 - 05:49:55 482
Klamath Falls 05:37:35 -54.8 Dark Up 23.5 93.0 Low 05:25:12 - 05:49:58 456
Lakeview 05:37:33 -55.7 Dark Up 24.6 94.0 Low 05:25:10 - 05:49:56 432
Cedarville 05:37:35 -56.1 Dark Up 24.8 93.8 Low 05:25:12 - 05:49:58 367
Fall River/Burney 05:37:38 -55.5 Dark Up 23.9 92.7 Low 05:25:15 - 05:50:01 338
Susanville 05:37:39 -56.2 Dark Up 24.5 93.0 Low 05:25:16 - 05:50:02 267
Greenville 05:37:40 -56.1 Dark Up 24.3 92.6 Low 05:25:17 - 05:50:03 245
Gimple 05:37:40 -56.2 Dark Up 24.3 92.7 Low 05:25:17 - 05:50:03 244
Quincy 05:37:40 -56.2 Dark Up 24.3 92.5 Low 05:25:17 - 05:50:03 226
Portola 05:37:40 -56.6 Dark Up 24.7 92.8 Low 05:25:17 - 05:50:03 207
Reno 05:37:40 -57.2 Dark Up 25.2 93.1 Low 05:25:17 - 05:50:03 171
Carson City 05:37:41 -57.3 Dark Up 25.2 93.0 Low 05:25:18 - 05:50:04 136
Gardnerville 05:37:41 -57.4 Dark Up 25.3 92.9 Low 05:25:18 - 05:50:04 112
Yerington 05:37:40 -57.8 Dark Up 25.7 93.3 Low 05:25:17 - 05:50:03 108
Hawthorne 05:37:40 -58.4 Dark Up 26.2 93.4 Low 05:25:17 - 05:50:03 55
Niwot 05:37:07 -66.4 Dark Up 36.1 103.7 Up 05:24:44 - 05:49:30 51
SwRI 05:37:08 -66.4 Dark Up 36.1 103.6 Up 05:24:45 - 05:49:31 41
Lee Vining 05:37:43 -58.2 Dark Up 25.8 92.8 Low 05:25:20 - 05:50:06 7
Tonopah 05:37:39 -59.6 Dark Up 27.3 94.1 Low 05:25:16 - 05:50:02 -11
Bishop 05:37:43 -59.0 Dark Up 26.4 93.0 Low 05:25:20 - 05:50:06 -63
Beatty 05:37:41 -60.4 Dark Up 27.7 93.8 Low 05:25:18 - 05:50:04 -132
Indian Springs 05:37:40 -61.3 Dark Up 28.6 94.3 Low 05:25:17 - 05:50:03 -180
CPSLO 05:37:52 -57.9 Dark Up 24.7 90.6 Low 05:25:29 - 05:50:15 -235
Henderson 05:37:39 -62.0 Dark Up 29.2 94.4 Low 05:25:16 - 05:50:02 -243
Searchlight/Boulder City 05:37:41 -62.2 Dark Up 29.3 94.1 Low 05:25:18 - 05:50:04 -302
Patrick 05:37:38 -63.1 Dark Up 30.2 94.7 Up 05:25:15 - 05:50:01 -322
Laughlin/Bullhead City 05:37:40 -62.6 Dark Up 29.6 94.2 Low 05:25:17 - 05:50:03 -337
Kingman/Dolan Springs 05:37:39 -63.0 Dark Up 30.0 94.5 Up 05:25:16 - 05:50:02 -342
DCO 05:37:37 -63.7 Dark Up 30.8 95.0 Up 05:25:14 - 05:50:00 -362
Mohave Valley 05:37:41 -62.7 Dark Up 29.6 94.0 Low 05:25:18 - 05:50:04 -365
Wildwood 05:37:51 -59.8 Dark Up 26.4 91.3 Low 05:25:28 - 05:50:14 -388
Lake Havasu City 05:37:41 -63.0 Dark Up 29.9 93.9 Low 05:25:18 - 05:50:04 -409
Parker 05:37:42 -63.2 Dark Up 29.9 93.8 Low 05:25:19 - 05:50:05 -445
Idyllwild 05:37:48 -61.4 Dark Up 28.0 92.1 Low 05:25:25 - 05:50:11 -453
Blythe 05:37:44 -63.1 Dark Up 29.7 93.3 Low 05:25:21 - 05:50:07 -495
George/Scottsdale 05:37:37 -65.2 Dark Up 32.0 94.9 Up 05:25:14 - 05:50:00 -521
Calipatria 05:37:47 -62.5 Dark Up 29.0 92.5 Low 05:25:24 - 05:50:10 -532
Yuma 05:37:46 -63.3 Dark Up 29.7 92.7 Low 05:25:23 - 05:50:09 -590

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 10TH, (2025/12/06 05:34UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 16.41  21
Alhena         06:37:42.8 +16:23:57  1.9  8.95  13
PPM 123740     07:14:32.5 +12:06:56  5.6  1.42  22
PPM 123712     07:13:23.7 +13:45:46  7.6  0.33  21
PPM 123691     07:12:28.5 +13:27:30  9.8  0.07  21
10TH           07:12:44.4 +13:28:14 14.1        21
Positions are for J2000

Event circumstances last updated at 2020/01/07 23:21:52 UT

Marc W. Buie, Southwest Research Institute

RECON