RECON: TNO occultation with 145451

Event between (145451) 05RM43 and star GA1120:01251410 with event index number of 1375257

Geocentric closest approach at 2025/01/20 08:39:12 UTC

J2000 position of star is 05:32:03.8 +23:10:58
Equinox of date position of star is 05:33:17.6 +23:11:47
Stellar brightness G=16.0, use SENSEUP=128
Star is 111 degrees from the moon. Moon is 64% illuminated.
TNO apparent brightness V=26.0

[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 164 seconds.
The 1-sigma cross-track error in the shadow position is 2377 km.
The sky-plane scale is 27571.3 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=794.4 km assuming a 5% albedo -- 3.1 sec chord
Diameter=324.3 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 145451, (2025/01/20 08:39UT)
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=14.0%
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 08:36:59 -59.3 Dark Up 44.8 251.0 Up 08:22:51 - 08:51:06 -1365
Kelowna 08:36:58 -59.7 Dark Up 45.0 251.2 Up 08:22:50 - 08:51:05 -1401
Peachland 08:36:58 -59.8 Dark Up 45.2 251.0 Up 08:22:50 - 08:51:05 -1418
Summerland 08:36:57 -59.9 Dark Up 45.2 251.3 Up 08:22:50 - 08:51:05 -1428
Penticton 08:36:57 -60.0 Dark Up 45.2 251.4 Up 08:22:49 - 08:51:04 -1431
Oliver 08:36:56 -60.3 Dark Up 45.3 251.8 Up 08:22:48 - 08:51:03 -1460
Anarchist Mountain Observatory 08:36:54 -60.5 Dark Up 45.2 252.1 Up 08:22:47 - 08:51:02 -1469
Tonasket 08:36:54 -60.8 Dark Up 45.3 252.3 Up 08:22:47 - 08:51:02 -1497
Okanogan 08:36:53 -61.1 Dark Up 45.5 252.5 Up 08:22:45 - 08:51:00 -1530
Brewster 08:36:53 -61.4 Dark Up 45.8 252.6 Up 08:22:45 - 08:51:00 -1558
Manson/Chelan 08:36:53 -61.7 Dark Up 46.1 252.4 Up 08:22:45 - 08:51:00 -1585
Entiat 08:36:52 -61.9 Dark Up 46.2 252.6 Up 08:22:45 - 08:51:00 -1606
Victoria 08:37:03 -61.4 Dark Up 47.9 248.6 Up 08:22:56 - 08:51:11 -1613
Wenatchee 08:36:52 -62.2 Dark Up 46.3 252.7 Up 08:22:44 - 08:50:59 -1630
Ellensburg 08:36:51 -62.6 Dark Up 46.6 252.9 Up 08:22:43 - 08:50:58 -1672
Pasco 08:36:45 -63.1 Dark Up 45.9 255.0 Up 08:22:37 - 08:50:52 -1698
Yakima 08:36:49 -63.0 Dark Up 46.7 253.3 Up 08:22:42 - 08:50:57 -1707
PNWRO 08:36:44 -63.3 Dark Up 45.8 255.4 Up 08:22:36 - 08:50:51 -1713
Toppenish/White Swan 08:36:48 -63.2 Dark Up 46.7 253.7 Up 08:22:41 - 08:50:56 -1722
Goldendale 08:36:48 -63.8 Dark Up 47.1 253.9 Up 08:22:40 - 08:50:55 -1781
Niwot 08:35:51 -63.0 Dark Up 36.7 270.8 Up 08:21:43 - 08:49:58 -1808
The Dalles 08:36:48 -64.1 Dark Up 47.4 253.8 Up 08:22:40 - 08:50:55 -1811
SwRI 08:35:51 -63.2 Dark Up 36.7 270.9 Up 08:21:43 - 08:49:58 -1820
Maupin 08:36:46 -64.5 Dark Up 47.5 254.3 Up 08:22:38 - 08:50:53 -1845
Redmond 08:36:44 -65.4 Dark Up 47.8 255.2 Up 08:22:36 - 08:50:51 -1928
Sisters 08:36:45 -65.4 Dark Up 48.0 254.8 Up 08:22:37 - 08:50:52 -1936
Bend 08:36:43 -65.6 Dark Up 47.9 255.3 Up 08:22:35 - 08:50:50 -1951
Oregon Observatory 08:36:43 -65.8 Dark Up 48.1 255.3 Up 08:22:35 - 08:50:50 -1970
La Pine/Gilchrist 08:36:42 -66.0 Dark Up 48.2 255.5 Up 08:22:35 - 08:50:50 -1990
North Lake 08:36:40 -66.3 Dark Up 47.8 256.5 Up 08:22:32 - 08:50:47 -2012
Paisley 08:36:37 -66.8 Dark Up 47.7 257.4 Up 08:22:29 - 08:50:44 -2052
Lakeview 08:36:35 -67.3 Dark Up 47.7 258.1 Up 08:22:27 - 08:50:42 -2093
Klamath Falls 08:36:39 -67.5 Dark Up 48.7 256.8 Up 08:22:31 - 08:50:46 -2130
Cedarville 08:36:32 -67.9 Dark Up 47.7 258.9 Up 08:22:25 - 08:50:40 -2148
Fall River/Burney 08:36:34 -68.6 Dark Up 48.7 258.5 Up 08:22:27 - 08:50:42 -2227
Susanville 08:36:30 -69.0 Dark Up 48.3 259.7 Up 08:22:23 - 08:50:38 -2264
Gimple 08:36:30 -69.4 Dark Up 48.5 259.9 Up 08:22:22 - 08:50:37 -2296
Greenville 08:36:30 -69.4 Dark Up 48.5 259.8 Up 08:22:23 - 08:50:38 -2298
Portola 08:36:28 -69.6 Dark Up 48.2 260.6 Up 08:22:20 - 08:50:35 -2315
Quincy 08:36:30 -69.6 Dark Up 48.6 260.0 Up 08:22:22 - 08:50:37 -2317
Reno 08:36:24 -69.7 Dark Up 47.8 261.3 Up 08:22:17 - 08:50:32 -2320
Yerington 08:36:21 -70.1 Dark Up 47.4 262.4 Up 08:22:14 - 08:50:29 -2352
Carson City 08:36:23 -70.0 Dark Up 47.8 261.7 Up 08:22:16 - 08:50:31 -2353
Gardnerville 08:36:23 -70.3 Dark Up 47.8 262.0 Up 08:22:15 - 08:50:30 -2374
Tonopah 08:36:13 -70.3 Dark Up 46.0 264.8 Up 08:22:06 - 08:50:21 -2379
Hawthorne 08:36:19 -70.3 Dark Up 47.0 263.3 Up 08:22:11 - 08:50:26 -2379
Lee Vining 08:36:18 -71.0 Dark Up 47.5 263.6 Up 08:22:11 - 08:50:26 -2447
Indian Springs 08:36:05 -71.0 Dark Up 44.9 267.3 Up 08:21:57 - 08:50:12 -2469
Beatty 08:36:08 -71.2 Dark Up 45.8 266.3 Up 08:22:01 - 08:50:16 -2473
Bishop 08:36:14 -71.4 Dark Up 47.0 264.7 Up 08:22:07 - 08:50:22 -2481
Henderson 08:36:01 -71.2 Dark Up 44.4 268.2 Up 08:21:54 - 08:50:09 -2497
Patrick 08:35:56 -71.2 Dark Up 43.5 269.5 Up 08:21:48 - 08:50:03 -2519
DCO 08:35:53 -71.0 Dark Up 42.9 270.2 Up 08:21:46 - 08:50:01 -2524
Kingman/Dolan Springs 08:35:56 -71.4 Dark Up 43.7 269.6 Up 08:21:48 - 08:50:03 -2546
Searchlight/Boulder City 08:35:59 -71.6 Dark Up 44.4 268.8 Up 08:21:52 - 08:50:07 -2549
Laughlin/Bullhead City 08:35:57 -71.7 Dark Up 44.1 269.3 Up 08:21:50 - 08:50:05 -2566
Mohave Valley 08:35:56 -71.9 Dark Up 44.1 269.6 Up 08:21:49 - 08:50:04 -2591
George/Scottsdale 08:35:45 -71.3 Dark Up 41.9 272.1 Up 08:21:38 - 08:49:53 -2611
Lake Havasu City 08:35:54 -72.1 Dark Up 43.9 270.1 Up 08:21:47 - 08:50:02 -2621
Parker 08:35:53 -72.4 Dark Up 43.9 270.5 Up 08:21:46 - 08:50:01 -2653
Blythe 08:35:52 -72.9 Dark Up 44.1 270.8 Up 08:21:45 - 08:50:00 -2713
CPSLO 08:36:15 -73.9 Dark Up 49.0 265.5 Up 08:22:08 - 08:50:23 -2748
Idyllwild 08:35:59 -73.9 Dark Up 45.9 269.5 Up 08:21:51 - 08:50:06 -2772
Calipatria 08:35:54 -73.8 Dark Up 44.9 270.8 Up 08:21:46 - 08:50:01 -2792
Wildwood 08:36:06 -74.4 Dark Up 47.4 268.1 Up 08:21:58 - 08:50:13 -2800
Yuma 08:35:50 -73.7 Dark Up 44.1 271.7 Up 08:21:43 - 08:49:58 -2803

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 08:39UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 14.78 124
Alnath         05:26:17.5 +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 2020/03/25 22:17:30 UT

Marc W. Buie, Southwest Research Institute

RECON