RECON: TNO occultation with 471512

Event between (471512) 12CG and star GA1020:03531341 with event index number of 2458581

Geocentric closest approach at 2025/03/20 07:30:46 UTC

J2000 position of star is 12:00:27.1 +12:05:19
Equinox of date position of star is 12:01:35.5 +11:57:53
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 72 degrees from the moon. Moon is 71% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 27.2 AU from the Sun and 26.3 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 109 seconds.
The 1-sigma cross-track error in the shadow position is 1612 km.
The sky-plane scale is 19056.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.9
Diameter=101.4 km assuming a 5% albedo -- 4.1 sec chord
Diameter=41.4 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 471512, (2025/03/20 07:31UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:42.8 +11:50:35  1.3 27.39  96
Denebola       11:50:20.8 +14:25:52  2.1  3.72  75
9Omi Vir       12:06:29.6 +08:35:34  4.1  3.55  69
PPM 128719     12:02:31.2 +12:14:14  7.0  0.35  72
PPM 128706     12:01:24.9 +11:43:47  9.9  0.23  72
471512         12:01:44.6 +11:56:54 14.1        71
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 20.1 km RECON observability=1.0 and success probability=11.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:31:43 -37.8 Dark Down 49.8 187.6 Up 07:22:10 - 07:41:17 4379
Kamloops 07:32:17 -38.8 Dark Down 50.7 165.5 Up 07:22:44 - 07:41:51 3854
Kelowna 07:32:15 -39.7 Dark Down 51.6 166.7 Up 07:22:41 - 07:41:48 3810
Peachland 07:32:15 -39.7 Dark Down 51.7 166.2 Up 07:22:42 - 07:41:49 3792
Summerland 07:32:15 -39.9 Dark Down 51.8 166.3 Up 07:22:41 - 07:41:48 3782
Penticton 07:32:15 -40.0 Dark Down 51.9 166.4 Up 07:22:41 - 07:41:48 3780
Oliver 07:32:14 -40.3 Dark Down 52.2 166.3 Up 07:22:40 - 07:41:47 3749
Anarchist Mountain Observatory 07:32:14 -40.5 Dark Down 52.4 166.6 Up 07:22:40 - 07:41:47 3741
Tonasket 07:32:13 -40.8 Dark Down 52.7 166.4 Up 07:22:40 - 07:41:47 3712
Okanogan 07:32:14 -41.1 Dark Down 53.0 166.0 Up 07:22:40 - 07:41:47 3679
Brewster 07:32:13 -41.4 Dark Down 53.3 165.6 Up 07:22:40 - 07:41:47 3649
Manson/Chelan 07:32:14 -41.5 Dark Down 53.4 164.9 Up 07:22:41 - 07:41:48 3621
Victoria 07:32:24 -40.4 Dark Down 52.1 160.1 Up 07:22:50 - 07:41:57 3585
Wenatchee 07:32:15 -42.0 Dark Down 53.8 164.5 Up 07:22:41 - 07:41:48 3574
Ellensburg 07:32:15 -42.3 Dark Down 54.2 164.0 Up 07:22:41 - 07:41:48 3531
Yakima 07:32:14 -42.7 Dark Down 54.6 163.8 Up 07:22:41 - 07:41:48 3495
PNWRO 07:32:09 -43.5 Dark Down 55.4 166.3 Up 07:22:35 - 07:41:42 3493
Toppenish/White Swan 07:32:14 -43.0 Dark Down 54.8 164.0 Up 07:22:40 - 07:41:47 3481
Dunrhomin 07:31:20 -49.4 Dark Up 61.4 191.6 Up 07:21:46 - 07:40:53 3454
CU-SBO 07:31:20 -49.7 Dark Up 61.7 191.5 Up 07:21:46 - 07:40:53 3429
Goldendale 07:32:14 -43.4 Dark Down 55.3 163.0 Up 07:22:41 - 07:41:48 3419
The Dalles 07:32:15 -43.6 Dark Down 55.4 162.3 Up 07:22:42 - 07:41:49 3388
Maupin 07:32:14 -44.0 Dark Down 55.8 162.3 Up 07:22:41 - 07:41:48 3353
Sisters 07:32:15 -44.8 Dark Down 56.5 161.1 Up 07:22:41 - 07:41:48 3259
Bend 07:32:12 -45.1 Dark Down 56.8 161.4 Up 07:22:39 - 07:41:46 3246
Oregon Observatory 07:32:14 -45.2 Dark Down 57.0 161.1 Up 07:22:41 - 07:41:48 3226
North Lake 07:32:12 -45.9 Dark Down 57.7 161.7 Up 07:22:38 - 07:41:45 3184
Lakeview 07:32:08 -47.0 Dark Down 58.8 162.1 Up 07:22:35 - 07:41:42 3104
Chiloquin 07:32:14 -46.4 Dark Down 58.1 159.7 Up 07:22:40 - 07:41:47 3092
Klamath Falls 07:32:13 -46.7 Dark Down 58.4 159.6 Up 07:22:40 - 07:41:47 3062
Cedarville 07:32:08 -47.7 Dark Down 59.5 162.1 Up 07:22:34 - 07:41:41 3049
Fall River/Burney 07:32:10 -47.9 Dark Down 59.6 159.6 Up 07:22:36 - 07:41:43 2965
Susanville 07:32:08 -48.7 Dark Down 60.4 160.6 Up 07:22:34 - 07:41:41 2929
Gimple 07:32:08 -48.9 Dark Down 60.6 160.0 Up 07:22:35 - 07:41:42 2896
Greenville 07:32:08 -48.9 Dark Down 60.6 159.9 Up 07:22:35 - 07:41:42 2894
Portola 07:32:07 -49.3 Dark Down 61.0 160.6 Up 07:22:33 - 07:41:40 2879
Reno 07:32:05 -49.7 Dark Down 61.5 161.7 Up 07:22:31 - 07:41:38 2875
Quincy 07:32:08 -49.1 Dark Down 60.8 159.8 Up 07:22:35 - 07:41:42 2875
Yerington 07:32:01 -50.3 Dark Down 62.1 162.7 Up 07:22:27 - 07:41:34 2845
Carson City 07:32:03 -50.0 Dark Down 61.8 161.5 Up 07:22:30 - 07:41:37 2842
Tonopah 07:31:54 -51.6 Dark Down 63.4 166.2 Up 07:22:21 - 07:41:28 2824
Gardnerville 07:32:03 -50.3 Dark Down 62.0 161.5 Up 07:22:29 - 07:41:36 2821
Hawthorne 07:31:58 -50.9 Dark Down 62.7 163.5 Up 07:22:25 - 07:41:32 2819
Lee Vining 07:32:00 -51.4 Dark Down 63.1 162.2 Up 07:22:26 - 07:41:33 2749
Indian Springs 07:31:47 -53.2 Dark Up 65.1 168.9 Up 07:22:13 - 07:41:20 2738
Beatty 07:31:51 -52.8 Dark Up 64.6 166.6 Up 07:22:17 - 07:41:24 2731
Bishop 07:31:57 -52.1 Dark Down 63.9 163.3 Up 07:22:23 - 07:41:30 2717
Henderson 07:31:44 -53.8 Dark Up 65.8 170.3 Up 07:22:10 - 07:41:17 2713
Patrick 07:31:39 -54.5 Dark Up 66.5 172.7 Up 07:22:06 - 07:41:13 2695
Kingman/Dolan Springs 07:31:40 -54.7 Dark Up 66.7 172.2 Up 07:22:06 - 07:41:13 2667
Laughlin/Bullhead City 07:31:41 -54.7 Dark Up 66.7 170.9 Up 07:22:07 - 07:41:14 2646
Mohave Valley 07:31:40 -55.0 Dark Up 67.0 170.8 Up 07:22:06 - 07:41:13 2620
George/Scottsdale 07:31:30 -56.3 Dark Up 68.4 177.3 Up 07:21:56 - 07:41:03 2612
Lake Havasu City 07:31:39 -55.4 Dark Up 67.4 171.3 Up 07:22:05 - 07:41:12 2592
Parker 07:31:39 -55.7 Dark Up 67.7 171.2 Up 07:22:05 - 07:41:12 2559
Idyllwild 07:31:46 -55.9 Dark Up 67.7 164.9 Up 07:22:13 - 07:41:20 2431
Calipatria 07:31:41 -56.6 Dark Up 68.5 167.6 Up 07:22:08 - 07:41:15 2416
Yuma 07:31:37 -57.2 Dark Up 69.1 169.7 Up 07:22:04 - 07:41:11 2408
Wildwood 07:31:53 -55.2 Dark Up 66.9 160.6 Up 07:22:19 - 07:41:26 2397

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 471512, (2025/03/20 07:31UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 27.39  96
Denebola       11:49:02.8 +14:34:17  2.1  3.72  75
9Omi Vir       12:05:12.2 +08:44:00  4.1  3.55  69
PPM 128719     12:01:13.7 +12:22:39  7.0  0.35  72
PPM 128706     12:00:07.4 +11:52:12  9.9  0.23  72
471512         12:00:27.1 +12:05:19 14.1        72
Positions are for J2000

Event circumstances last updated at 2022/04/06 23:09:06 UT

Marc W. Buie, Southwest Research Institute

RECON