RECON: TNO occultation with 145451

Event between (145451) 05RM43 and star GA1120:01251410 with event index number of 2468844

Geocentric closest approach at 2025/01/20 08:39:59 UTC

J2000 position of star is 05:32:03.8 +23:10:58
Equinox of date position of star is 05:33:24.0 +23:11:51
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 111 degrees from the moon. Moon is 64% illuminated.
TNO apparent brightness V=20.6

[RECON map]
TNO is 38.8 AU from the Sun and 38.0 AU from the Earth.
The TNO is moving 19.5 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 101 seconds.
The 1-sigma cross-track error in the shadow position is 1680 km.
The sky-plane scale is 27571.3 km/arcsec.

The TNO has an absolute magnitude Hv=4.6
Diameter=721.1 km assuming a 5% albedo -- 37.0 sec chord
Diameter=294.4 km assuming a 30% albedo -- 15.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 145451, (2025/01/20 08:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.7 +16:33:28  0.8 14.78 124
Alnath         05:27:52.7 +28:37:35  1.6  5.58 112
114 Tau        05:29:08.5 +21:57:22  4.7  1.61 112
PPM 094431     05:32:14.2 +22:28:46  7.2  0.78 111
PPM 094436     05:32:35.6 +23:13:36  9.5  0.23 111
PPM 094438     05:32:36.7 +23:14:04 10.9  0.23 111
145451         05:33:35.1 +23:11:58 16.0       110
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 19.6 km RECON observability=1.0 and success probability=20.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:37:25 -54.1 Dark Up 36.1 261.7 Up 08:28:28 - 08:46:22 -1358
Kamloops 08:37:49 -59.0 Dark Up 45.1 249.8 Up 08:28:52 - 08:46:46 -1838
Kelowna 08:37:43 -59.6 Dark Up 44.9 251.4 Up 08:28:46 - 08:46:40 -1883
Peachland 08:37:44 -59.8 Dark Up 45.1 251.2 Up 08:28:47 - 08:46:41 -1900
Summerland 08:37:43 -59.9 Dark Up 45.1 251.4 Up 08:28:46 - 08:46:40 -1910
Penticton 08:37:43 -60.0 Dark Up 45.0 251.6 Up 08:28:46 - 08:46:40 -1912
Oliver 08:37:42 -60.3 Dark Up 45.2 251.9 Up 08:28:45 - 08:46:39 -1942
Anarchist Mountain Observatory 08:37:40 -60.4 Dark Up 45.1 252.3 Up 08:28:43 - 08:46:37 -1951
Tonasket 08:37:40 -60.8 Dark Up 45.2 252.5 Up 08:28:43 - 08:46:37 -1979
Okanogan 08:37:39 -61.1 Dark Up 45.4 252.7 Up 08:28:42 - 08:46:36 -2011
Brewster 08:37:38 -61.4 Dark Up 45.6 252.8 Up 08:28:41 - 08:46:35 -2039
Manson/Chelan 08:37:39 -61.7 Dark Up 45.9 252.6 Up 08:28:42 - 08:46:36 -2067
Victoria 08:37:49 -61.4 Dark Up 47.7 248.8 Up 08:28:52 - 08:46:46 -2095
Wenatchee 08:37:37 -62.1 Dark Up 46.2 252.9 Up 08:28:40 - 08:46:34 -2112
Ellensburg 08:37:36 -62.6 Dark Up 46.5 253.1 Up 08:28:39 - 08:46:33 -2153
Yakima 08:37:35 -63.0 Dark Up 46.6 253.5 Up 08:28:38 - 08:46:32 -2189
PNWRO 08:37:29 -63.3 Dark Up 45.6 255.6 Up 08:28:32 - 08:46:26 -2194
Toppenish/White Swan 08:37:34 -63.2 Dark Up 46.5 253.9 Up 08:28:37 - 08:46:31 -2203
Goldendale 08:37:34 -63.8 Dark Up 47.0 254.1 Up 08:28:37 - 08:46:31 -2262
Dunrhomin 08:36:37 -62.8 Dark Up 36.5 270.9 Up 08:27:40 - 08:45:34 -2275
The Dalles 08:37:33 -64.0 Dark Up 47.3 253.9 Up 08:28:36 - 08:46:30 -2292
Maupin 08:37:31 -64.4 Dark Up 47.3 254.5 Up 08:28:34 - 08:46:28 -2326
Sisters 08:37:30 -65.4 Dark Up 47.9 255.0 Up 08:28:33 - 08:46:27 -2418
Bend 08:37:29 -65.6 Dark Up 47.8 255.4 Up 08:28:32 - 08:46:26 -2432
Oregon Observatory 08:37:28 -65.8 Dark Up 47.9 255.5 Up 08:28:31 - 08:46:25 -2451
North Lake 08:37:25 -66.3 Dark Up 47.7 256.7 Up 08:28:28 - 08:46:22 -2493
Lakeview 08:37:20 -67.2 Dark Up 47.6 258.2 Up 08:28:23 - 08:46:17 -2574
Chiloquin 08:37:26 -67.1 Dark Up 48.5 256.6 Up 08:28:29 - 08:46:23 -2582
Klamath Falls 08:37:25 -67.4 Dark Up 48.6 257.0 Up 08:28:28 - 08:46:22 -2611
Cedarville 08:37:17 -67.8 Dark Up 47.6 259.1 Up 08:28:20 - 08:46:14 -2628
Fall River/Burney 08:37:20 -68.5 Dark Up 48.6 258.6 Up 08:28:23 - 08:46:17 -2708
Susanville 08:37:16 -69.0 Dark Up 48.1 259.9 Up 08:28:19 - 08:46:13 -2745
Gimple 08:37:16 -69.3 Dark Up 48.3 260.0 Up 08:28:19 - 08:46:13 -2777
Greenville 08:37:16 -69.3 Dark Up 48.4 260.0 Up 08:28:19 - 08:46:13 -2779
Portola 08:37:13 -69.5 Dark Up 48.1 260.7 Up 08:28:16 - 08:46:10 -2795
Quincy 08:37:15 -69.5 Dark Up 48.4 260.2 Up 08:28:18 - 08:46:12 -2798
Reno 08:37:11 -69.7 Dark Up 47.7 261.5 Up 08:28:14 - 08:46:08 -2801
Yerington 08:37:07 -70.0 Dark Up 47.2 262.6 Up 08:28:10 - 08:46:04 -2833
Carson City 08:37:09 -70.0 Dark Up 47.7 261.9 Up 08:28:12 - 08:46:06 -2834
Gardnerville 08:37:09 -70.2 Dark Up 47.7 262.2 Up 08:28:12 - 08:46:06 -2855
Tonopah 08:36:58 -70.3 Dark Up 45.9 264.9 Up 08:28:01 - 08:45:55 -2859
Hawthorne 08:37:04 -70.3 Dark Up 46.9 263.4 Up 08:28:07 - 08:46:01 -2860
Lee Vining 08:37:03 -71.0 Dark Up 47.3 263.7 Up 08:28:06 - 08:46:00 -2927
Indian Springs 08:36:50 -71.0 Dark Up 44.8 267.4 Up 08:27:53 - 08:45:47 -2950
Beatty 08:36:54 -71.1 Dark Up 45.6 266.4 Up 08:27:57 - 08:45:51 -2954
Bishop 08:37:00 -71.3 Dark Up 46.8 264.8 Up 08:28:03 - 08:45:57 -2961
Henderson 08:36:46 -71.1 Dark Up 44.2 268.3 Up 08:27:49 - 08:45:43 -2977
Patrick 08:36:41 -71.1 Dark Up 43.4 269.6 Up 08:27:44 - 08:45:38 -2999
Kingman/Dolan Springs 08:36:41 -71.3 Dark Up 43.5 269.7 Up 08:27:44 - 08:45:38 -3026
Laughlin/Bullhead City 08:36:43 -71.6 Dark Up 43.9 269.4 Up 08:27:46 - 08:45:40 -3046
Mohave Valley 08:36:42 -71.8 Dark Up 43.9 269.7 Up 08:27:45 - 08:45:39 -3071
George/Scottsdale 08:36:31 -71.2 Dark Up 41.7 272.2 Up 08:27:34 - 08:45:28 -3090
Lake Havasu City 08:36:40 -72.0 Dark Up 43.7 270.2 Up 08:27:43 - 08:45:37 -3101
Parker 08:36:39 -72.3 Dark Up 43.7 270.6 Up 08:27:42 - 08:45:36 -3133
Idyllwild 08:36:45 -73.8 Dark Up 45.7 269.6 Up 08:27:48 - 08:45:42 -3252
Calipatria 08:36:40 -73.7 Dark Up 44.7 270.9 Up 08:27:43 - 08:45:37 -3272
Wildwood 08:36:52 -74.3 Dark Up 47.2 268.2 Up 08:27:55 - 08:45:49 -3280
Yuma 08:36:36 -73.6 Dark Up 44.0 271.8 Up 08:27:39 - 08:45:33 -3283

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 145451, (2025/01/20 08:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 14.78 124
Alnath         05:26:17.6 +28:36:23  1.6  5.58 112
114 Tau        05:27:38.1 +21:56:13  4.7  1.61 112
PPM 094431     05:30:43.4 +22:27:43  7.2  0.78 111
PPM 094436     05:31:04.4 +23:12:34  9.5  0.23 111
PPM 094438     05:31:05.4 +23:13:03 10.9  0.23 111
145451         05:32:03.8 +23:10:58 16.0       111
Positions are for J2000

Event circumstances last updated at 2022/01/03 23:16:42 UT

Marc W. Buie, Southwest Research Institute

RECON