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 08:39:05 UTC

J2000 position of star is 05:32:03.8 +23:10:58
Equinox of date position of star is 05:33:14.6 +23:11:45
Stellar brightness G=16.0, use SENSEUP=128
Star is 111 degrees from the moon. Moon is 64% illuminated.
TNO apparent brightness V=20.4

[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 172 seconds.
The 1-sigma cross-track error in the shadow position is 2471 km.
The sky-plane scale is 27571.3 km/arcsec.

The TNO has an absolute magnitude Hv=4.4
Diameter=794.4 km assuming a 5% albedo -- 40.8 sec chord
Diameter=324.3 km assuming a 30% albedo -- 16.6 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 19.1 km RECON observability=1.0 and success probability=13.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:36:49 -59.6 Dark Up 45.0 251.2 Up 08:22:01 - 08:51:37 -1247
Summerland 08:36:49 -59.9 Dark Up 45.2 251.2 Up 08:22:01 - 08:51:37 -1279
Penticton 08:36:48 -60.0 Dark Up 45.2 251.4 Up 08:22:00 - 08:51:36 -1282
Okanagan Falls 08:36:48 -60.2 Dark Up 45.3 251.5 Up 08:22:00 - 08:51:36 -1298
Oliver 08:36:47 -60.3 Dark Up 45.3 251.7 Up 08:21:59 - 08:51:35 -1311
Anarchist Mountain Observatory 08:36:46 -60.5 Dark Up 45.2 252.1 Up 08:21:58 - 08:51:34 -1321
Oroville 08:36:46 -60.6 Dark Up 45.3 252.1 Up 08:21:58 - 08:51:34 -1329
Tonasket 08:36:45 -60.8 Dark Up 45.4 252.3 Up 08:21:57 - 08:51:33 -1348
Okanogan 08:36:44 -61.1 Dark Up 45.6 252.5 Up 08:21:56 - 08:51:32 -1380
Brewster 08:36:44 -61.4 Dark Up 45.8 252.5 Up 08:21:56 - 08:51:32 -1409
Manson/Chelan 08:36:44 -61.7 Dark Up 46.1 252.4 Up 08:21:56 - 08:51:32 -1436
Entiat 08:36:43 -61.9 Dark Up 46.2 252.5 Up 08:21:55 - 08:51:31 -1457
Wenatchee 08:36:43 -62.2 Dark Up 46.3 252.7 Up 08:21:55 - 08:51:31 -1481
Ellensburg 08:36:42 -62.6 Dark Up 46.6 252.9 Up 08:21:54 - 08:51:30 -1523
Pasco 08:36:36 -63.1 Dark Up 45.9 255.0 Up 08:21:48 - 08:51:24 -1549
Yakima 08:36:41 -63.0 Dark Up 46.7 253.3 Up 08:21:53 - 08:51:29 -1558
PNWRO 08:36:34 -63.3 Dark Up 45.8 255.4 Up 08:21:46 - 08:51:22 -1564
Toppenish/White Swan 08:36:40 -63.2 Dark Up 46.7 253.7 Up 08:21:52 - 08:51:28 -1572
George/Umatilla 08:36:35 -63.5 Dark Up 46.1 255.1 Up 08:21:47 - 08:51:23 -1584
Goldendale 08:36:39 -63.8 Dark Up 47.1 253.8 Up 08:21:51 - 08:51:27 -1632
Niwot 08:35:43 -63.1 Dark Up 36.7 270.8 Up 08:20:55 - 08:50:31 -1660
The Dalles 08:36:39 -64.1 Dark Up 47.4 253.7 Up 08:21:51 - 08:51:27 -1662
SwRI 08:35:42 -63.2 Dark Up 36.8 270.8 Up 08:20:54 - 08:50:30 -1672
Maupin 08:36:38 -64.5 Dark Up 47.5 254.3 Up 08:21:50 - 08:51:26 -1696
Madras/Culver 08:36:36 -65.0 Dark Up 47.7 254.8 Up 08:21:48 - 08:51:24 -1746
Redmond 08:36:35 -65.4 Dark Up 47.8 255.1 Up 08:21:47 - 08:51:23 -1779
Sisters 08:36:36 -65.4 Dark Up 48.1 254.7 Up 08:21:48 - 08:51:24 -1788
Bend 08:36:34 -65.6 Dark Up 47.9 255.2 Up 08:21:46 - 08:51:22 -1802
Oregon Observatory 08:36:34 -65.8 Dark Up 48.1 255.3 Up 08:21:46 - 08:51:22 -1821
La Pine/Gilchrist 08:36:34 -66.0 Dark Up 48.2 255.5 Up 08:21:46 - 08:51:22 -1841
North Lake 08:36:30 -66.3 Dark Up 47.9 256.5 Up 08:21:42 - 08:51:18 -1864
Paisley 08:36:28 -66.8 Dark Up 47.7 257.4 Up 08:21:40 - 08:51:16 -1904
Lakeview 08:36:26 -67.3 Dark Up 47.7 258.1 Up 08:21:38 - 08:51:14 -1944
Chiloquin 08:36:32 -67.1 Dark Up 48.7 256.4 Up 08:21:44 - 08:51:20 -1952
Klamath Falls 08:36:30 -67.5 Dark Up 48.7 256.8 Up 08:21:42 - 08:51:18 -1981
Tulelake 08:36:29 -67.7 Dark Up 48.6 257.4 Up 08:21:41 - 08:51:17 -1997
Cedarville 08:36:23 -67.9 Dark Up 47.7 258.9 Up 08:21:35 - 08:51:11 -1999
Fall River/Burney 08:36:26 -68.6 Dark Up 48.7 258.4 Up 08:21:38 - 08:51:14 -2079
Susanville 08:36:22 -69.1 Dark Up 48.3 259.7 Up 08:21:34 - 08:51:10 -2115
Gimple 08:36:21 -69.4 Dark Up 48.5 259.9 Up 08:21:33 - 08:51:09 -2147
Greenville 08:36:22 -69.4 Dark Up 48.6 259.8 Up 08:21:34 - 08:51:10 -2150
Portola 08:36:19 -69.6 Dark Up 48.3 260.5 Up 08:21:31 - 08:51:07 -2166
Quincy 08:36:21 -69.6 Dark Up 48.6 260.0 Up 08:21:33 - 08:51:09 -2168
Reno 08:36:17 -69.7 Dark Up 47.8 261.3 Up 08:21:29 - 08:51:05 -2172
Yerington 08:36:13 -70.1 Dark Up 47.4 262.4 Up 08:21:25 - 08:51:01 -2204
Carson City 08:36:15 -70.0 Dark Up 47.9 261.7 Up 08:21:27 - 08:51:03 -2204
Gardnerville 08:36:14 -70.3 Dark Up 47.9 262.0 Up 08:21:26 - 08:51:02 -2226
Tonopah 08:36:05 -70.3 Dark Up 46.0 264.7 Up 08:21:17 - 08:50:53 -2231
Hawthorne 08:36:10 -70.4 Dark Up 47.1 263.3 Up 08:21:22 - 08:50:58 -2231
Lee Vining 08:36:10 -71.0 Dark Up 47.5 263.5 Up 08:21:22 - 08:50:58 -2299
Indian Springs 08:35:56 -71.1 Dark Up 44.9 267.2 Up 08:21:08 - 08:50:44 -2321
Beatty 08:36:00 -71.2 Dark Up 45.8 266.2 Up 08:21:12 - 08:50:48 -2325
Bishop 08:36:06 -71.4 Dark Up 47.0 264.7 Up 08:21:18 - 08:50:54 -2332
Henderson 08:35:52 -71.2 Dark Up 44.4 268.2 Up 08:21:04 - 08:50:40 -2348
Patrick 08:35:47 -71.2 Dark Up 43.5 269.5 Up 08:20:59 - 08:50:35 -2370
DCO 08:35:45 -71.1 Dark Up 43.0 270.2 Up 08:20:57 - 08:50:33 -2375
Lone Pine 08:36:02 -72.0 Dark Up 46.8 265.7 Up 08:21:14 - 08:50:50 -2394
Kingman/Dolan Springs 08:35:47 -71.5 Dark Up 43.7 269.6 Up 08:20:59 - 08:50:35 -2398
Searchlight/Boulder City 08:35:50 -71.7 Dark Up 44.4 268.8 Up 08:21:02 - 08:50:38 -2400
Laughlin/Bullhead City 08:35:49 -71.7 Dark Up 44.1 269.3 Up 08:21:01 - 08:50:37 -2417
Mohave Valley 08:35:47 -71.9 Dark Up 44.1 269.6 Up 08:20:59 - 08:50:35 -2442
Lake Havasu City 08:35:46 -72.1 Dark Up 43.9 270.1 Up 08:20:58 - 08:50:34 -2472
Parker 08:35:45 -72.4 Dark Up 43.9 270.4 Up 08:20:57 - 08:50:33 -2504
Blythe 08:35:44 -73.0 Dark Up 44.1 270.8 Up 08:20:56 - 08:50:32 -2564
CPSLO 08:36:07 -74.0 Dark Up 49.0 265.4 Up 08:21:19 - 08:50:55 -2599
Idyllwild 08:35:51 -73.9 Dark Up 45.9 269.5 Up 08:21:03 - 08:50:39 -2624
Calipatria 08:35:45 -73.8 Dark Up 44.9 270.8 Up 08:20:57 - 08:50:33 -2643
Wildwood 08:35:57 -74.4 Dark Up 47.4 268.0 Up 08:21:09 - 08:50:45 -2651
Yuma 08:35:41 -73.7 Dark Up 44.2 271.6 Up 08:20:53 - 08:50:29 -2654

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 2019/06/08 09:56:45 UT

Marc W. Buie, Southwest Research Institute

RECON