RECON: TNO occultation with 14AM55

Event between 14AM55 and star GA1040:03327340 with event index number of 2470843

Geocentric closest approach at 2025/02/21 08:16:05 UTC

J2000 position of star is 09:46:48.1 +15:02:25
Equinox of date position of star is 09:48:00.4 +14:56:14
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 106 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 47.3 AU from the Sun and 46.4 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 122 seconds.
The 1-sigma cross-track error in the shadow position is 2068 km.
The sky-plane scale is 33632.9 km/arcsec.

The TNO has an absolute magnitude Hv=5.1
Diameter=570.2 km assuming a 5% albedo -- 22.4 sec chord
Diameter=232.8 km assuming a 30% albedo -- 9.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 14AM55, (2025/02/21 08:16UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:42.6 +11:50:36  1.3  6.08 100
16Psi Leo      09:45:05.9 +13:54:20  5.3  1.26 106
PPM 126824     09:50:34.9 +14:50:21  8.0  0.59 105
PPM 126765     09:47:14.9 +15:05:58  9.7  0.28 106
14AM55         09:48:10.3 +14:55:23 13.9       106
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=21.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:16:02 -46.7 Dark Down 48.7 214.7 Up 08:05:21 - 08:26:43 2833
Kamloops 08:16:34 -49.7 Dark Down 53.7 194.1 Up 08:05:53 - 08:27:15 2329
Kelowna 08:16:30 -50.5 Dark Down 54.3 195.8 Up 08:05:49 - 08:27:11 2287
Peachland 08:16:30 -50.7 Dark Down 54.5 195.4 Up 08:05:49 - 08:27:11 2270
Summerland 08:16:30 -50.8 Dark Down 54.6 195.6 Up 08:05:49 - 08:27:11 2261
Penticton 08:16:30 -50.9 Dark Down 54.7 195.8 Up 08:05:49 - 08:27:11 2259
Oliver 08:16:30 -51.2 Dark Down 55.0 195.9 Up 08:05:49 - 08:27:11 2230
Anarchist Mountain Observatory 08:16:28 -51.4 Dark Down 55.1 196.3 Up 08:05:47 - 08:27:09 2222
Tonasket 08:16:28 -51.7 Dark Down 55.4 196.3 Up 08:05:47 - 08:27:09 2194
Okanogan 08:16:28 -52.0 Dark Down 55.8 196.2 Up 08:05:47 - 08:27:09 2162
Brewster 08:16:28 -52.3 Dark Down 56.1 196.0 Up 08:05:47 - 08:27:09 2134
Manson/Chelan 08:16:29 -52.5 Dark Down 56.4 195.4 Up 08:05:48 - 08:27:10 2106
Victoria 08:16:38 -51.8 Dark Down 56.2 189.7 Up 08:05:57 - 08:27:19 2070
Wenatchee 08:16:28 -53.0 Dark Down 56.9 195.3 Up 08:05:47 - 08:27:09 2062
Ellensburg 08:16:28 -53.4 Dark Down 57.3 195.1 Up 08:05:47 - 08:27:09 2021
Yakima 08:16:27 -53.8 Dark Down 57.7 195.2 Up 08:05:46 - 08:27:08 1986
PNWRO 08:16:22 -54.4 Dark Down 57.9 198.4 Up 08:05:41 - 08:27:03 1985
Toppenish/White Swan 08:16:27 -54.0 Dark Down 57.9 195.6 Up 08:05:46 - 08:27:08 1972
Dunrhomin 08:15:32 -57.2 Dark Down 57.5 225.9 Up 08:04:51 - 08:26:13 1948
CU-SBO 08:15:32 -57.5 Dark Down 57.7 226.0 Up 08:04:51 - 08:26:13 1924
Goldendale 08:16:27 -54.6 Dark Down 58.5 195.1 Up 08:05:46 - 08:27:08 1913
The Dalles 08:16:27 -54.8 Dark Down 58.8 194.5 Up 08:05:46 - 08:27:08 1883
Maupin 08:16:27 -55.2 Dark Down 59.1 194.9 Up 08:05:46 - 08:27:08 1850
Sisters 08:16:27 -56.1 Dark Down 60.1 194.3 Up 08:05:46 - 08:27:08 1759
Bend 08:16:25 -56.4 Dark Down 60.3 194.9 Up 08:05:44 - 08:27:06 1746
Oregon Observatory 08:16:25 -56.5 Dark Down 60.5 194.7 Up 08:05:44 - 08:27:06 1727
North Lake 08:16:23 -57.2 Dark Down 61.0 196.1 Up 08:05:42 - 08:27:04 1687
Lakeview 08:16:19 -58.2 Dark Down 61.9 197.7 Up 08:05:38 - 08:27:00 1610
Chiloquin 08:16:24 -57.8 Dark Down 61.8 194.5 Up 08:05:43 - 08:27:05 1598
Klamath Falls 08:16:24 -58.2 Dark Down 62.1 194.8 Up 08:05:43 - 08:27:05 1570
Cedarville 08:16:18 -58.9 Dark Down 62.5 198.4 Up 08:05:37 - 08:26:59 1557
Fall River/Burney 08:16:21 -59.4 Dark Down 63.2 196.2 Up 08:05:40 - 08:27:02 1475
Susanville 08:16:17 -60.0 Dark Down 63.6 198.1 Up 08:05:36 - 08:26:58 1442
Gimple 08:16:17 -60.3 Dark Down 63.9 197.8 Up 08:05:36 - 08:26:58 1410
Greenville 08:16:18 -60.3 Dark Down 64.0 197.7 Up 08:05:37 - 08:26:59 1408
Portola 08:16:16 -60.6 Dark Down 64.2 198.9 Up 08:05:35 - 08:26:57 1393
Reno 08:16:13 -60.9 Dark Down 64.2 200.4 Up 08:05:32 - 08:26:54 1390
Quincy 08:16:17 -60.5 Dark Down 64.2 197.8 Up 08:05:36 - 08:26:58 1389
Yerington 08:16:10 -61.4 Dark Down 64.6 202.3 Up 08:05:29 - 08:26:51 1361
Carson City 08:16:13 -61.2 Dark Down 64.6 200.8 Up 08:05:32 - 08:26:54 1358
Tonopah 08:16:03 -62.2 Dark Down 64.8 207.1 Up 08:05:22 - 08:26:44 1341
Gardnerville 08:16:12 -61.5 Dark Down 64.8 201.0 Up 08:05:31 - 08:26:53 1337
Hawthorne 08:16:08 -61.8 Dark Down 64.8 203.8 Up 08:05:27 - 08:26:49 1336
Lee Vining 08:16:08 -62.4 Dark Down 65.5 203.2 Up 08:05:27 - 08:26:49 1268
Indian Springs 08:15:56 -63.5 Dark Down 65.5 211.9 Up 08:05:15 - 08:26:37 1258
Beatty 08:15:59 -63.3 Dark Down 65.7 209.3 Up 08:05:18 - 08:26:40 1250
Bishop 08:16:05 -63.0 Dark Down 65.8 205.3 Up 08:05:24 - 08:26:46 1237
Henderson 08:15:52 -63.9 Dark Down 65.7 213.9 Up 08:05:11 - 08:26:33 1233
Patrick 08:15:47 -64.3 Dark Down 65.6 217.0 Up 08:05:06 - 08:26:28 1215
Kingman/Dolan Springs 08:15:47 -64.5 Dark Down 65.9 216.9 Up 08:05:06 - 08:26:28 1188
Laughlin/Bullhead City 08:15:49 -64.7 Dark Down 66.2 215.9 Up 08:05:08 - 08:26:30 1167
Mohave Valley 08:15:48 -64.9 Dark Down 66.4 216.3 Up 08:05:07 - 08:26:29 1142
George/Scottsdale 08:15:38 -65.4 Dark Down 65.9 223.3 Up 08:04:57 - 08:26:19 1133
Lake Havasu City 08:15:47 -65.3 Dark Down 66.6 217.3 Up 08:05:06 - 08:26:28 1114
Parker 08:15:46 -65.6 Dark Down 66.9 217.9 Up 08:05:05 - 08:26:27 1083
Idyllwild 08:15:53 -66.4 Dark Down 68.4 213.2 Up 08:05:12 - 08:26:34 958
Calipatria 08:15:48 -66.8 Dark Down 68.3 216.7 Up 08:05:07 - 08:26:29 943
Yuma 08:15:44 -67.1 Dark Down 68.2 219.3 Up 08:05:03 - 08:26:25 935
Wildwood 08:16:00 -66.3 Dark Down 68.8 208.3 Up 08:05:19 - 08:26:41 925

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 14AM55, (2025/02/21 08:16UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  6.08 100
16Psi Leo      09:43:43.9 +14:01:18  5.3  1.26 106
PPM 126824     09:49:12.8 +14:57:26  8.0  0.59 105
PPM 126765     09:45:52.6 +15:12:59  9.7  0.28 106
14AM55         09:46:48.1 +15:02:25 13.9       106
Positions are for J2000

Event circumstances last updated at 2022/02/13 02:04:13 UT

Marc W. Buie, Southwest Research Institute

RECON