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 12:01:41.2 +11:57:16
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.
Apparent brightness V=23.2

[RECON map]
Object is 27.2 AU from the Sun and 26.3 AU from the Earth.
Apparent velocity is 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 1613 km.
The sky-plane scale is 19056.2 km/arcsec.

The object 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 21.4 km RECON observability=1.0 and success probability=8.8%
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 07:32:18 -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 07:22:42 - 07:41:49 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 07:22:41 - 07:41:48 3750
Anarchist Mountain Observatory 07:32:13 -40.5 Dark Down 52.4 166.6 Up 07:22:40 - 07:41:47 3741
Okanogan 07:32:14 -41.1 Dark Down 53.0 166.0 Up 07:22:40 - 07:41:47 3678
Brewster 07:32:14 -41.4 Dark Down 53.3 165.6 Up 07:22:40 - 07:41:47 3649
Manson/Chelan 07:32:15 -41.5 Dark Down 53.4 164.9 Up 07:22:41 - 07:41:48 3620
Victoria 07:32:24 -40.4 Dark Down 52.1 160.1 Up 07:22:50 - 07:41:57 3585
Wenatchee 07:32:14 -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 07:32:13 -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 3455
Nikitin 07:31:20 -49.6 Dark Up 61.6 191.6 Up 07:21:46 - 07:40:53 3438
CU-SBO 07:31:20 -49.7 Dark Up 61.7 191.5 Up 07:21:46 - 07:40:53 3429
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 07:32:14 -45.1 Dark Down 56.8 161.4 Up 07:22:40 - 07:41:47 3245
Oregon Observatory 07:32:14 -45.2 Dark Down 57.0 161.1 Up 07:22:41 - 07:41:48 3225
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 07:32:07 -47.7 Dark Down 59.5 162.1 Up 07:22:34 - 07:41:41 3048
Fall River/Burney 07:32:11 -47.9 Dark Down 59.6 159.6 Up 07:22:37 - 07:41:44 2964
Gimple 07:32:08 -48.9 Dark Down 60.6 160.0 Up 07:22:34 - 07:41:41 2896
Greenville 07:32:08 -48.9 Dark Down 60.6 159.9 Up 07:22:34 - 07:41:41 2894
Portola 07:32:06 -49.3 Dark Down 61.0 160.6 Up 07:22:33 - 07:41:40 2879
Reno 07:32:04 -49.7 Dark Down 61.5 161.7 Up 07:22:30 - 07:41:37 2875
Quincy 07:32:07 -49.1 Dark Down 60.8 159.8 Up 07:22:34 - 07:41:41 2875
Yerington 07:32:01 -50.3 Dark Down 62.1 162.7 Up 07:22:28 - 07:41:35 2845
Carson City 07:32:04 -50.0 Dark Down 61.8 161.5 Up 07:22:30 - 07:41:37 2842
Gardnerville 07:32:03 -50.3 Dark Down 62.0 161.5 Up 07:22:30 - 07:41:37 2821
Hawthorne 07:31:59 -50.9 Dark Down 62.7 163.5 Up 07:22:26 - 07:41:33 2819
Lee Vining 07:32:00 -51.4 Dark Down 63.1 162.2 Up 07:22:26 - 07:41:33 2749
Beatty 07:31:51 -52.8 Dark Up 64.6 166.6 Up 07:22:17 - 07:41:24 2731
Bishop 07:31:56 -52.1 Dark Down 63.9 163.3 Up 07:22:23 - 07:41:30 2717
Patrick 07:31:39 -54.5 Dark Up 66.5 172.7 Up 07:22:05 - 07:41:12 2695
Laughlin/Bullhead City 07:31:41 -54.7 Dark Up 66.7 170.9 Up 07:22:08 - 07:41:15 2646
George/Scottsdale 07:31:29 -56.3 Dark Up 68.4 177.3 Up 07:21:56 - 07:41:03 2611
Lake Havasu City 07:31:39 -55.4 Dark Up 67.4 171.3 Up 07:22:06 - 07:41:13 2591
Idyllwild 07:31:46 -55.9 Dark Up 67.7 164.9 Up 07:22:12 - 07:41:19 2431
Calipatria 07:31:41 -56.6 Dark Up 68.5 167.5 Up 07:22:08 - 07:41:15 2416
Yuma 07:31:37 -57.2 Dark Up 69.1 169.7 Up 07:22:03 - 07:41:10 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 2024/02/15 06:00:31 UT

Marc W. Buie, Southwest Research Institute

RECON