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 09:47:51.7 +14:56:59
Stellar brightness G=13.9, use SENSEUP=64
Star is 106 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=21.9

[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=5.2
Diameter=559.8 km assuming a 5% albedo -- 21.9 sec chord
Diameter=228.5 km assuming a 30% albedo -- 8.9 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 15.9 km RECON observability=1.0 and success probability=11.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:19:36 -50.5 Dark Down 54.1 197.2 Up 08:04:36 - 08:34:36 2455
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
Okanagan Falls 08:19:35 -51.0 Dark Down 54.7 197.1 Up 08:04:35 - 08:34:35 2405
Oliver 08:19:35 -51.2 Dark Down 54.9 197.2 Up 08:04:35 - 08:34:35 2393
Anarchist Mountain Observatory 08:19:34 -51.4 Dark Down 55.0 197.6 Up 08:04:34 - 08:34:34 2384
Oroville 08:19:34 -51.4 Dark Down 55.1 197.5 Up 08:04:34 - 08:34:34 2376
Tonasket 08:19:34 -51.7 Dark Down 55.3 197.6 Up 08:04:34 - 08:34:34 2357
Okanogan 08:19:33 -52.0 Dark Down 55.6 197.5 Up 08:04:33 - 08:34:33 2326
Brewster 08:19:33 -52.3 Dark Down 55.9 197.3 Up 08:04:33 - 08:34:33 2297
Manson/Chelan 08:19:35 -52.5 Dark Down 56.2 196.7 Up 08:04:35 - 08:34:35 2270
Entiat 08:19:34 -52.7 Dark Down 56.4 196.7 Up 08:04:34 - 08:34:34 2250
Wenatchee 08:19:33 -53.0 Dark Down 56.7 196.6 Up 08:04:33 - 08:34:33 2226
Ellensburg 08:19:33 -53.4 Dark Down 57.1 196.4 Up 08:04:33 - 08:34:33 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
George/Umatilla 08:19:28 -54.5 Dark Down 57.9 199.0 Up 08:04:28 - 08:34:28 2129
Niwot 08:18:38 -57.1 Dark Down 57.2 227.2 Up 08:03:38 - 08:33:38 2104
SwRI 08:18:37 -57.2 Dark Down 57.3 227.1 Up 08:03:37 - 08:33:37 2092
Goldendale 08:19:32 -54.6 Dark Down 58.3 196.5 Up 08:04:32 - 08:34:32 2077
The Dalles 08:19:33 -54.8 Dark Down 58.6 195.9 Up 08:04:33 - 08:34:33 2047
Maupin 08:19:32 -55.2 Dark Down 59.0 196.3 Up 08:04:32 - 08:34:32 2015
Madras/Culver 08:19:31 -55.8 Dark Down 59.5 196.5 Up 08:04:31 - 08:34:31 1966
Redmond 08:19:31 -56.1 Dark Down 59.9 196.6 Up 08:04:31 - 08:34:31 1933
Sisters 08:19:32 -56.1 Dark Down 59.9 195.8 Up 08:04:32 - 08:34:32 1923
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 1891
La Pine/Gilchrist 08:19:30 -56.7 Dark Down 60.5 196.2 Up 08:04:30 - 08:34:30 1872
North Lake 08:19:28 -57.2 Dark Down 60.8 197.6 Up 08:04:28 - 08:34:28 1852
Paisley 08:19:26 -57.7 Dark Down 61.3 198.6 Up 08:04:26 - 08:34:26 1814
Lakeview 08:19:25 -58.2 Dark Down 61.7 199.2 Up 08:04:25 - 08:34:25 1776
Chiloquin 08:19:30 -57.9 Dark Down 61.7 196.1 Up 08:04:30 - 08:34:30 1763
Klamath Falls 08:19:29 -58.2 Dark Down 62.0 196.4 Up 08:04:29 - 08:34:29 1735
Cedarville 08:19:23 -58.9 Dark Down 62.3 200.0 Up 08:04:23 - 08:34:23 1723
Tulelake 08:19:29 -58.5 Dark Down 62.2 197.2 Up 08:04:29 - 08:34:29 1720
Fall River/Burney 08:19:26 -59.4 Dark Down 63.0 197.8 Up 08:04:26 - 08:34:26 1641
Susanville 08:19:23 -60.0 Dark Down 63.4 199.8 Up 08:04:23 - 08:34:23 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 1573
Portola 08:19:21 -60.6 Dark Down 64.0 200.5 Up 08:04:21 - 08:34:21 1559
Reno 08:19:18 -60.8 Dark Down 64.0 202.1 Up 08:04:18 - 08:34:18 1556
Quincy 08:19:23 -60.5 Dark Down 64.0 199.5 Up 08:04:23 - 08:34:23 1555
Yerington 08:19:15 -61.4 Dark Down 64.3 203.9 Up 08:04:15 - 08:34:15 1527
Carson City 08:19:18 -61.2 Dark Down 64.4 202.4 Up 08:04:18 - 08:34:18 1524
Tonopah 08:19:08 -62.1 Dark Down 64.5 208.8 Up 08:04:08 - 08:34:08 1508
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 1503
Lee Vining 08:19:13 -62.4 Dark Down 65.3 204.9 Up 08:04:13 - 08:34:13 1435
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 1418
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 1382
Kingman/Dolan Springs 08:18:52 -64.4 Dark Down 65.5 218.5 Up 08:03:52 - 08:33:52 1357
Searchlight/Boulder City 08:18:56 -64.3 Dark Down 65.7 216.4 Up 08:03:56 - 08:33:56 1352
Lone Pine 08:19:08 -63.6 Dark Down 66.1 208.5 Up 08:04:08 - 08:34:08 1346
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
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 08:18:59 -66.3 Dark Down 68.0 215.0 Up 08:03:59 - 08:33:59 1127
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 1093

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 2019/06/08 10:13:32 UT

Marc W. Buie, Southwest Research Institute

RECON