RECON: TNO occultation with 471512

Event between (471512) 12CG and star GA1020:03531341 with event index number of 1385176

Geocentric closest approach at 2025/03/20 07:35:35 UTC

J2000 position of star is 12:00:27.1 +12:05:19
Equinox of date position of star is 12:01:26.8 +11:58:50
Stellar brightness G=14.1, use SENSEUP=64
Star is 72 degrees from the moon. Moon is 71% illuminated.
TNO apparent brightness V=23.0

[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 304 seconds.
The 1-sigma cross-track error in the shadow position is 4035 km.
The sky-plane scale is 19056.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.7
Diameter=109.7 km assuming a 5% albedo -- 4.4 sec chord
Diameter=44.8 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 471512, (2025/03/20 07:36UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:42.8 +11:50:35  1.3 27.39  96
Denebola       11:50:20.9 +14:25:52  2.1  3.72  76
9Omi Vir       12:06:29.7 +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        72
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 3.0 sigma about the mid-time.
The median site spacing is 16.6 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)
Kelowna 07:37:01 -39.8 Dark Down 51.7 168.7 Up 07:22:01 - 07:52:01 3442
Summerland 07:37:02 -40.0 Dark Down 52.0 168.1 Up 07:22:02 - 07:52:02 3408
Penticton 07:37:01 -40.1 Dark Down 52.1 168.3 Up 07:22:01 - 07:52:01 3406
Okanagan Falls 07:37:01 -40.3 Dark Down 52.3 168.2 Up 07:22:01 - 07:52:01 3390
Oliver 07:37:01 -40.5 Dark Down 52.4 168.2 Up 07:22:01 - 07:52:01 3376
Anarchist Mountain Observatory 07:37:00 -40.6 Dark Down 52.6 168.5 Up 07:22:00 - 07:52:00 3367
Oroville 07:37:00 -40.7 Dark Down 52.7 168.3 Up 07:22:00 - 07:52:00 3359
Tonasket 07:37:00 -40.9 Dark Down 52.9 168.3 Up 07:22:00 - 07:52:00 3339
Okanogan 07:37:00 -41.3 Dark Down 53.2 167.9 Up 07:22:00 - 07:52:00 3306
Brewster 07:37:00 -41.5 Dark Down 53.4 167.5 Up 07:22:00 - 07:52:00 3277
Manson/Chelan 07:37:01 -41.7 Dark Down 53.6 166.9 Up 07:22:01 - 07:52:01 3248
Entiat 07:37:01 -41.9 Dark Down 53.8 166.7 Up 07:22:01 - 07:52:01 3227
Wenatchee 07:37:01 -42.1 Dark Down 54.0 166.4 Up 07:22:01 - 07:52:01 3202
Ellensburg 07:37:01 -42.5 Dark Down 54.4 165.9 Up 07:22:01 - 07:52:01 3159
Pasco 07:36:56 -43.4 Dark Down 55.3 168.1 Up 07:21:56 - 07:51:56 3136
Yakima 07:37:01 -42.9 Dark Down 54.8 165.8 Up 07:22:01 - 07:52:01 3123
PNWRO 07:36:56 -43.7 Dark Down 55.6 168.4 Up 07:21:56 - 07:51:56 3122
Toppenish/White Swan 07:37:00 -43.1 Dark Down 55.0 166.0 Up 07:22:00 - 07:52:00 3109
George/Umatilla 07:36:57 -43.7 Dark Down 55.6 167.6 Up 07:21:57 - 07:51:57 3100
Niwot 07:36:06 -49.4 Dark Up 61.3 194.0 Up 07:21:06 - 07:51:06 3079
SwRI 07:36:06 -49.5 Dark Up 61.5 193.9 Up 07:21:06 - 07:51:06 3066
Goldendale 07:37:01 -43.6 Dark Down 55.5 165.1 Up 07:22:01 - 07:52:01 3047
The Dalles 07:37:01 -43.8 Dark Down 55.6 164.4 Up 07:22:01 - 07:52:01 3016
Maupin 07:37:01 -44.2 Dark Down 56.1 164.4 Up 07:22:01 - 07:52:01 2982
Madras/Culver 07:37:00 -44.7 Dark Down 56.6 164.1 Up 07:22:00 - 07:52:00 2932
Redmond 07:37:00 -45.1 Dark Down 56.9 163.8 Up 07:22:00 - 07:52:00 2898
Sisters 07:37:00 -45.0 Dark Down 56.8 163.1 Up 07:22:00 - 07:52:00 2888
Bend 07:37:00 -45.3 Dark Down 57.1 163.5 Up 07:22:00 - 07:52:00 2874
Oregon Observatory 07:37:00 -45.4 Dark Down 57.2 163.2 Up 07:22:00 - 07:52:00 2854
La Pine/Gilchrist 07:37:00 -45.6 Dark Down 57.4 163.0 Up 07:22:00 - 07:52:00 2834
North Lake 07:36:58 -46.1 Dark Down 58.0 163.9 Up 07:21:58 - 07:51:58 2813
Paisley 07:36:56 -46.7 Dark Down 58.6 164.2 Up 07:21:56 - 07:51:56 2774
Lakeview 07:36:55 -47.2 Dark Down 59.1 164.4 Up 07:21:55 - 07:51:55 2734
Chiloquin 07:37:00 -46.6 Dark Down 58.4 161.8 Up 07:22:00 - 07:52:00 2721
Klamath Falls 07:36:59 -47.0 Dark Down 58.7 161.8 Up 07:21:59 - 07:51:59 2692
Cedarville 07:36:54 -47.9 Dark Down 59.7 164.4 Up 07:21:54 - 07:51:54 2680
Tulelake 07:36:58 -47.3 Dark Down 59.1 162.2 Up 07:21:58 - 07:51:58 2677
Fall River/Burney 07:36:57 -48.2 Dark Down 59.9 161.8 Up 07:21:57 - 07:51:57 2595
Susanville 07:36:54 -48.9 Dark Down 60.7 162.9 Up 07:21:54 - 07:51:54 2561
Gimple 07:36:54 -49.1 Dark Down 60.9 162.4 Up 07:21:54 - 07:51:54 2528
Greenville 07:36:55 -49.1 Dark Down 60.9 162.2 Up 07:21:55 - 07:51:55 2525
Portola 07:36:53 -49.5 Dark Down 61.3 163.0 Up 07:21:53 - 07:51:53 2510
Reno 07:36:50 -49.9 Dark Down 61.7 164.1 Up 07:21:50 - 07:51:50 2507
Quincy 07:36:54 -49.3 Dark Down 61.1 162.1 Up 07:21:54 - 07:51:54 2506
Yerington 07:36:47 -50.5 Dark Down 62.4 165.1 Up 07:21:47 - 07:51:47 2478
Carson City 07:36:49 -50.2 Dark Down 62.1 163.9 Up 07:21:49 - 07:51:49 2474
Tonopah 07:36:40 -51.7 Dark Down 63.6 168.8 Up 07:21:40 - 07:51:40 2458
Gardnerville 07:36:49 -50.5 Dark Down 62.3 163.9 Up 07:21:49 - 07:51:49 2453
Hawthorne 07:36:45 -51.1 Dark Down 62.9 166.0 Up 07:21:45 - 07:51:45 2452
Lee Vining 07:36:46 -51.6 Dark Down 63.4 164.7 Up 07:21:46 - 07:51:46 2383
Indian Springs 07:36:32 -53.3 Dark Up 65.3 171.6 Up 07:21:32 - 07:51:32 2374
Beatty 07:36:36 -52.9 Dark Up 64.8 169.3 Up 07:21:36 - 07:51:36 2366
Bishop 07:36:43 -52.2 Dark Down 64.1 165.9 Up 07:21:43 - 07:51:43 2351
Henderson 07:36:30 -53.9 Dark Up 65.9 173.1 Up 07:21:30 - 07:51:30 2350
Patrick 07:36:25 -54.6 Dark Up 66.6 175.6 Up 07:21:25 - 07:51:25 2332
DCO 07:36:22 -54.9 Dark Up 67.0 177.3 Up 07:21:22 - 07:51:22 2330
Kingman/Dolan Springs 07:36:25 -54.8 Dark Up 66.8 175.1 Up 07:21:25 - 07:51:25 2304
Searchlight/Boulder City 07:36:28 -54.5 Dark Up 66.5 173.1 Up 07:21:28 - 07:51:28 2298
Lone Pine 07:36:40 -53.0 Dark Up 64.9 166.3 Up 07:21:40 - 07:51:40 2291
Laughlin/Bullhead City 07:36:27 -54.8 Dark Up 66.8 173.8 Up 07:21:27 - 07:51:27 2283
Mohave Valley 07:36:26 -55.1 Dark Up 67.1 173.8 Up 07:21:26 - 07:51:26 2258
Lake Havasu City 07:36:25 -55.5 Dark Up 67.5 174.3 Up 07:21:25 - 07:51:25 2229
Parker 07:36:24 -55.8 Dark Up 67.9 174.3 Up 07:21:24 - 07:51:24 2197
Blythe 07:36:24 -56.3 Dark Up 68.3 173.3 Up 07:21:24 - 07:51:24 2136
CPSLO 07:36:47 -53.9 Dark Down 65.5 159.6 Up 07:21:47 - 07:51:47 2076
Idyllwild 07:36:32 -56.0 Dark Up 68.0 167.9 Up 07:21:32 - 07:51:32 2068
Calipatria 07:36:26 -56.8 Dark Up 68.7 170.7 Up 07:21:26 - 07:51:26 2054
Yuma 07:36:23 -57.3 Dark Up 69.3 172.9 Up 07:21:23 - 07:51:23 2047
Wildwood 07:36:39 -55.4 Dark Up 67.2 163.5 Up 07:21:39 - 07:51:39 2033

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 07:36UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 27.39  96
Denebola       11:49:02.9 +14:34:17  2.1  3.72  76
9Omi Vir       12:05:12.2 +08:43:59  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 +11:52:13  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 2019/06/08 10:39:43 UT

Marc W. Buie, Southwest Research Institute

RECON