RECON: TNO occultation with 05CE81

Event between 05CE81 and star GA0980:03664553 with event index number of 2013032

Geocentric closest approach at 2026/02/20 07:57:51 UTC

J2000 position of star is 11:03:13.1 +09:00:52
Equinox of date position of star is 11:04:22.8 +08:53:39
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 156 degrees from the moon. Moon is 9% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 40.8 AU from the Sun and 39.8 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 285 seconds.
The 1-sigma cross-track error in the shadow position is 3800 km.
The sky-plane scale is 28884.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.0 km assuming a 5% albedo -- 8.5 sec chord
Diameter=84.9 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 05CE81, (2026/02/20 07:58UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:45.8 +11:50:18  1.3 13.80 143
68Del Leo      11:15:29.6 +20:22:49  2.6 11.80 149
63Chi Leo      11:06:22.0 +07:11:39  4.6  1.74 157
PPM 157450     11:03:54.6 +09:01:55  7.7  0.23 156
PPM 157456     11:04:21.0 +08:59:14 10.2  0.13 156
05CE81         11:04:34.8 +08:52:24 14.0       156
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 3.2 sigma about the mid-time.
The median site spacing is 20.6 km RECON observability=1.0 and success probability=6.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:59:06 -47.9 Dark Down 46.9 177.6 Up 07:44:06 - 08:14:06 7600
Kamloops 07:59:41 -50.1 Dark Down 46.3 156.8 Up 07:44:41 - 08:14:41 7114
Kelowna 07:59:39 -50.9 Dark Down 47.3 157.7 Up 07:44:39 - 08:14:39 7066
Peachland 07:59:40 -51.0 Dark Down 47.3 157.3 Up 07:44:40 - 08:14:40 7049
Summerland 07:59:40 -51.2 Dark Down 47.5 157.3 Up 07:44:40 - 08:14:40 7039
Penticton 07:59:39 -51.3 Dark Down 47.5 157.5 Up 07:44:39 - 08:14:39 7036
Oliver 07:59:39 -51.6 Dark Down 47.9 157.3 Up 07:44:39 - 08:14:39 7006
Anarchist Mountain Observatory 07:59:38 -51.8 Dark Down 48.1 157.5 Up 07:44:38 - 08:14:38 6996
Tonasket 07:59:38 -52.1 Dark Down 48.3 157.3 Up 07:44:38 - 08:14:38 6967
Okanogan 07:59:38 -52.4 Dark Down 48.6 156.9 Up 07:44:38 - 08:14:38 6934
Brewster 07:59:39 -52.7 Dark Down 48.8 156.5 Up 07:44:39 - 08:14:39 6905
Manson/Chelan 07:59:40 -52.9 Dark Down 48.9 155.9 Up 07:44:40 - 08:14:40 6877
Victoria 07:59:49 -51.9 Dark Down 47.4 151.7 Up 07:44:49 - 08:14:49 6852
Wenatchee 07:59:40 -53.3 Dark Down 49.3 155.4 Up 07:44:40 - 08:14:40 6831
Ellensburg 07:59:41 -53.7 Dark Down 49.6 154.9 Up 07:44:41 - 08:14:41 6789
Yakima 07:59:40 -54.1 Dark Down 50.0 154.7 Up 07:44:40 - 08:14:40 6752
PNWRO 07:59:34 -54.8 Dark Down 51.0 156.8 Up 07:44:34 - 08:14:34 6744
Toppenish/White Swan 07:59:41 -54.3 Dark Down 50.2 154.8 Up 07:44:41 - 08:14:41 6737
Goldendale 07:59:41 -54.9 Dark Down 50.6 153.9 Up 07:44:41 - 08:14:41 6676
Dunrhomin 07:58:48 -59.0 Dark Down 58.7 178.1 Up 07:43:48 - 08:13:48 6655
The Dalles 07:59:42 -55.0 Dark Down 50.7 153.2 Up 07:44:42 - 08:14:42 6646
CU-SBO 07:58:48 -59.3 Dark Down 59.0 177.9 Up 07:43:48 - 08:13:48 6629
Maupin 07:59:40 -55.5 Dark Down 51.1 153.1 Up 07:44:40 - 08:14:40 6611
Sisters 07:59:42 -56.3 Dark Down 51.7 151.9 Up 07:44:42 - 08:14:42 6518
Bend 07:59:40 -56.6 Dark Down 52.0 152.1 Up 07:44:40 - 08:14:40 6503
Oregon Observatory 07:59:41 -56.7 Dark Down 52.1 151.9 Up 07:44:41 - 08:14:41 6483
North Lake 07:59:39 -57.4 Dark Down 52.9 152.3 Up 07:44:39 - 08:14:39 6439
Lakeview 07:59:37 -58.5 Dark Down 54.0 152.5 Up 07:44:37 - 08:14:37 6357
Chiloquin 07:59:41 -58.0 Dark Down 53.1 150.4 Up 07:44:41 - 08:14:41 6350
Klamath Falls 07:59:41 -58.3 Dark Down 53.4 150.3 Up 07:44:41 - 08:14:41 6320
Cedarville 07:59:36 -59.2 Dark Down 54.6 152.3 Up 07:44:36 - 08:14:36 6300
Fall River/Burney 07:59:39 -59.5 Dark Down 54.6 150.1 Up 07:44:39 - 08:14:39 6220
Susanville 07:59:37 -60.2 Dark Down 55.4 150.8 Up 07:44:37 - 08:14:37 6182
Gimple 07:59:37 -60.5 Dark Down 55.6 150.3 Up 07:44:37 - 08:14:37 6149
Greenville 07:59:36 -60.5 Dark Down 55.6 150.1 Up 07:44:36 - 08:14:36 6147
Portola 07:59:34 -60.8 Dark Down 56.0 150.6 Up 07:44:34 - 08:14:34 6130
Quincy 07:59:37 -60.7 Dark Down 55.7 150.0 Up 07:44:37 - 08:14:37 6128
Reno 07:59:32 -61.2 Dark Down 56.5 151.5 Up 07:44:32 - 08:14:32 6124
Yerington 07:59:30 -61.8 Dark Down 57.2 152.2 Up 07:44:30 - 08:14:30 6091
Carson City 07:59:33 -61.5 Dark Down 56.8 151.3 Up 07:44:33 - 08:14:33 6090
Gardnerville 07:59:33 -61.8 Dark Down 57.0 151.2 Up 07:44:33 - 08:14:33 6068
Hawthorne 07:59:28 -62.3 Dark Down 57.8 152.8 Up 07:44:28 - 08:14:28 6063
Tonopah 07:59:24 -62.8 Dark Down 58.7 154.9 Up 07:44:24 - 08:14:24 6062
Lee Vining 07:59:30 -62.8 Dark Down 58.1 151.5 Up 07:44:30 - 08:14:30 5994
Indian Springs 07:59:17 -64.3 Dark Down 60.6 156.6 Up 07:44:17 - 08:14:17 5969
Beatty 07:59:20 -64.0 Dark Down 59.9 154.8 Up 07:44:20 - 08:14:20 5966
Bishop 07:59:26 -63.5 Dark Down 58.9 152.3 Up 07:44:26 - 08:14:26 5959
Henderson 07:59:14 -64.8 Dark Down 61.3 157.6 Up 07:44:14 - 08:14:14 5941
Patrick 07:59:09 -65.4 Dark Down 62.2 159.3 Up 07:44:09 - 08:14:09 5918
Kingman/Dolan Springs 07:59:09 -65.6 Dark Down 62.3 158.8 Up 07:44:09 - 08:14:09 5891
Laughlin/Bullhead City 07:59:11 -65.7 Dark Down 62.2 157.7 Up 07:44:11 - 08:14:11 5871
Mohave Valley 07:59:12 -65.9 Dark Down 62.5 157.6 Up 07:44:12 - 08:14:12 5845
George/Scottsdale 07:59:00 -66.8 Dark Down 64.3 162.4 Up 07:44:00 - 08:14:00 5825
Lake Havasu City 07:59:10 -66.3 Dark Down 62.9 157.7 Up 07:44:10 - 08:14:10 5815
Parker 07:59:10 -66.7 Dark Down 63.2 157.5 Up 07:44:10 - 08:14:10 5782
Idyllwild 07:59:17 -67.1 Dark Down 62.8 152.3 Up 07:44:17 - 08:14:17 5662
Calipatria 07:59:13 -67.7 Dark Down 63.7 154.2 Up 07:44:13 - 08:14:13 5642
Wildwood 07:59:24 -66.7 Dark Down 61.7 149.1 Up 07:44:24 - 08:14:24 5635
Yuma 07:59:09 -68.1 Dark Down 64.5 155.6 Up 07:44:09 - 08:14:09 5630

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 05CE81, (2026/02/20 07:58UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 13.80 143
68Del Leo      11:14:06.7 +20:31:23  2.6 11.80 149
63Chi Leo      11:05:00.5 +07:20:09  4.6  1.74 157
PPM 157450     11:02:32.8 +09:10:22  7.7  0.23 156
PPM 157456     11:02:59.3 +09:07:43 10.2  0.13 156
05CE81         11:03:13.1 +09:00:52 14.0       156
Positions are for J2000

Event circumstances last updated at 2022/04/13 23:12:00 UT

Marc W. Buie, Southwest Research Institute

RECON