RECON: TNO occultation with 14AM55

Event between 14AM55 and star GA1040:03327340 with event index number of 1412590

Geocentric closest approach at 2025/02/21 08:19:12 UTC

J2000 position of star is 09:46:48.1 +15:02:25
Equinox of date position of star is 09:47:54.3 +14:56:45
Stellar brightness G=13.9, use SENSEUP=64
Star is 106 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=26.7

[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 217 seconds.
The 1-sigma cross-track error in the shadow position is 2929 km.
The sky-plane scale is 33632.8 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=559.8 km assuming a 5% albedo -- 2.4 sec chord
Diameter=228.5 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 14AM55, (2025/02/21 08:19UT)
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 4.2 sigma about the mid-time.
The median site spacing is 17.0 km RECON observability=1.0 and success probability=12.2%
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 08:19:36 -50.1 Dark Down 53.8 197.2 Up 08:04:36 - 08:34:36 2486
Kelowna 08:19:35 -50.5 Dark Down 54.2 197.1 Up 08:04:35 - 08:34:35 2450
Peachland 08:19:36 -50.6 Dark Down 54.4 196.6 Up 08:04:36 - 08:34:36 2433
Summerland 08:19:35 -50.8 Dark Down 54.5 196.8 Up 08:04:35 - 08:34:35 2424
Penticton 08:19:35 -50.9 Dark Down 54.5 197.1 Up 08:04:35 - 08:34:35 2421
Oliver 08:19:34 -51.2 Dark Down 54.9 197.2 Up 08:04:34 - 08:34:34 2393
Anarchist Mountain Observatory 08:19:34 -51.4 Dark Down 55.0 197.6 Up 08:04:34 - 08:34:34 2385
Tonasket 08:19:33 -51.7 Dark Down 55.3 197.6 Up 08:04:33 - 08:34:33 2357
Okanogan 08:19:34 -52.0 Dark Down 55.6 197.5 Up 08:04:34 - 08:34:34 2326
Brewster 08:19:33 -52.3 Dark Down 55.9 197.3 Up 08:04:33 - 08:34:33 2298
Manson/Chelan 08:19:34 -52.5 Dark Down 56.2 196.7 Up 08:04:34 - 08:34:34 2270
Entiat 08:19:34 -52.7 Dark Down 56.4 196.7 Up 08:04:34 - 08:34:34 2250
Victoria 08:19:43 -51.9 Dark Down 56.1 191.0 Up 08:04:43 - 08:34:43 2232
Wenatchee 08:19:34 -53.0 Dark Down 56.7 196.7 Up 08:04:34 - 08:34:34 2226
Ellensburg 08:19:34 -53.4 Dark Down 57.1 196.4 Up 08:04:34 - 08:34:34 2185
Pasco 08:19:28 -54.1 Dark Down 57.6 199.3 Up 08:04:28 - 08:34:28 2164
Yakima 08:19:33 -53.8 Dark Down 57.5 196.6 Up 08:04:33 - 08:34:33 2150
PNWRO 08:19:27 -54.3 Dark Down 57.7 199.8 Up 08:04:27 - 08:34:27 2150
Toppenish/White Swan 08:19:32 -54.0 Dark Down 57.7 197.0 Up 08:04:32 - 08:34:32 2137
Niwot 08:18:37 -57.1 Dark Down 57.2 227.2 Up 08:03:37 - 08:33:37 2105
SwRI 08:18:37 -57.2 Dark Down 57.3 227.1 Up 08:03:37 - 08:33:37 2093
Goldendale 08:19:32 -54.6 Dark Down 58.3 196.5 Up 08:04:32 - 08:34:32 2077
The Dalles 08:19:34 -54.8 Dark Down 58.6 195.9 Up 08:04:34 - 08:34:34 2047
Maupin 08:19:32 -55.2 Dark Down 59.0 196.3 Up 08:04:32 - 08:34:32 2015
Redmond 08:19:30 -56.1 Dark Down 59.9 196.6 Up 08:04:30 - 08:34:30 1934
Sisters 08:19:32 -56.1 Dark Down 59.9 195.8 Up 08:04:32 - 08:34:32 1924
Bend 08:19:30 -56.4 Dark Down 60.1 196.4 Up 08:04:30 - 08:34:30 1911
Oregon Observatory 08:19:31 -56.5 Dark Down 60.3 196.2 Up 08:04:31 - 08:34:31 1892
La Pine/Gilchrist 08:19:31 -56.7 Dark Down 60.5 196.2 Up 08:04:31 - 08:34:31 1873
North Lake 08:19:28 -57.2 Dark Down 60.8 197.6 Up 08:04:28 - 08:34:28 1853
Paisley 08:19:26 -57.7 Dark Down 61.3 198.6 Up 08:04:26 - 08:34:26 1815
Lakeview 08:19:25 -58.2 Dark Down 61.7 199.2 Up 08:04:25 - 08:34:25 1776
Klamath Falls 08:19:30 -58.2 Dark Down 62.0 196.4 Up 08:04:30 - 08:34:30 1735
Cedarville 08:19:23 -58.9 Dark Down 62.3 200.0 Up 08:04:23 - 08:34:23 1724
Fall River/Burney 08:19:26 -59.4 Dark Down 63.0 197.8 Up 08:04:26 - 08:34:26 1642
Susanville 08:19:22 -60.0 Dark Down 63.4 199.7 Up 08:04:22 - 08:34:22 1608
Gimple 08:19:23 -60.3 Dark Down 63.8 199.5 Up 08:04:23 - 08:34:23 1576
Greenville 08:19:23 -60.3 Dark Down 63.8 199.3 Up 08:04:23 - 08:34:23 1574
Portola 08:19:21 -60.6 Dark Down 64.0 200.5 Up 08:04:21 - 08:34:21 1560
Reno 08:19:18 -60.8 Dark Down 64.0 202.1 Up 08:04:18 - 08:34:18 1557
Quincy 08:19:22 -60.5 Dark Down 64.0 199.5 Up 08:04:22 - 08:34:22 1556
Yerington 08:19:15 -61.4 Dark Down 64.3 203.9 Up 08:04:15 - 08:34:15 1528
Carson City 08:19:18 -61.2 Dark Down 64.4 202.4 Up 08:04:18 - 08:34:18 1525
Tonopah 08:19:08 -62.1 Dark Down 64.5 208.8 Up 08:04:08 - 08:34:08 1509
Gardnerville 08:19:17 -61.4 Dark Down 64.6 202.7 Up 08:04:17 - 08:34:17 1504
Hawthorne 08:19:13 -61.8 Dark Down 64.6 205.4 Up 08:04:13 - 08:34:13 1504
Lee Vining 08:19:14 -62.4 Dark Down 65.3 204.9 Up 08:04:14 - 08:34:14 1436
Indian Springs 08:19:00 -63.3 Dark Down 65.2 213.5 Up 08:04:00 - 08:34:00 1426
Beatty 08:19:04 -63.2 Dark Down 65.3 210.9 Up 08:04:04 - 08:34:04 1419
Bishop 08:19:10 -62.9 Dark Down 65.6 207.0 Up 08:04:10 - 08:34:10 1405
Henderson 08:18:57 -63.7 Dark Down 65.3 215.5 Up 08:03:57 - 08:33:57 1402
Patrick 08:18:52 -64.1 Dark Down 65.3 218.5 Up 08:03:52 - 08:33:52 1385
DCO 08:18:50 -64.2 Dark Down 65.1 220.3 Up 08:03:50 - 08:33:50 1383
Kingman/Dolan Springs 08:18:52 -64.4 Dark Down 65.5 218.5 Up 08:03:52 - 08:33:52 1358
Searchlight/Boulder City 08:18:56 -64.3 Dark Down 65.7 216.4 Up 08:03:56 - 08:33:56 1352
Laughlin/Bullhead City 08:18:54 -64.5 Dark Down 65.8 217.5 Up 08:03:54 - 08:33:54 1337
Mohave Valley 08:18:54 -64.8 Dark Down 66.0 217.9 Up 08:03:54 - 08:33:54 1312
George/Scottsdale 08:18:43 -65.1 Dark Down 65.4 224.8 Up 08:03:43 - 08:33:43 1303
Lake Havasu City 08:18:52 -65.1 Dark Down 66.2 218.9 Up 08:03:52 - 08:33:52 1284
Parker 08:18:51 -65.4 Dark Down 66.5 219.5 Up 08:03:51 - 08:33:51 1253
Blythe 08:18:51 -66.0 Dark Down 67.0 219.6 Up 08:03:51 - 08:33:51 1193
CPSLO 08:19:14 -65.1 Dark Down 68.2 203.9 Up 08:04:14 - 08:34:14 1136
Idyllwild 08:18:58 -66.3 Dark Down 68.0 214.9 Up 08:03:58 - 08:33:58 1128
Calipatria 08:18:53 -66.7 Dark Down 67.9 218.4 Up 08:03:53 - 08:33:53 1113
Yuma 08:18:49 -66.9 Dark Down 67.8 221.0 Up 08:03:49 - 08:33:49 1105
Wildwood 08:19:05 -66.2 Dark Down 68.5 210.2 Up 08:04:05 - 08:34:05 1094

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 08:19UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +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 2020/03/26 21:28:10 UT

Marc W. Buie, Southwest Research Institute

RECON