RECON: TNO occultation with 26181

Event between (26181) 96GQ21 and star GA0780:05889733 with event index number of 2775705

Geocentric closest approach at 2029/05/25 04:55:43 UTC

J2000 position of star is 16:58:23.2 -10:44:38
Equinox of date position of star is 16:59:44.5 -10:46:47
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 49 degrees from the moon. Moon is 90% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 48.4 AU from the Sun and 47.5 AU from the Earth.
Apparent velocity is 24.1 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 120 seconds.
The 1-sigma cross-track error in the shadow position is 1722 km.
The sky-plane scale is 34417.9 km/arcsec.

The object has an absolute magnitude Hv=4.8
Diameter=625.2 km assuming a 5% albedo -- 26.8 sec chord
Diameter=255.2 km assuming a 30% albedo -- 10.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 26181, (2029/05/25 04:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:12.9 -26:29:40  0.9 17.11  41
13Zet Oph      16:38:46.8 -10:37:27  2.6  5.22  44
PPM 232375     16:59:03.8 -11:00:27  6.3  0.32  48
PPM 232398     16:59:49.7 -10:35:20  7.8  0.20  49
26181          17:00:00.8 -10:47:13 16.5        49
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 0.0 km RECON observability=0.2 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 04:58:12 -12.2 AT Up 17.2 135.6 Really Low 04:47:43 - 05:08:41 11780
Kamloops 04:58:39 -8.1 NT Up 11.1 122.7 Really Low 04:48:10 - 05:09:08 11430
Kelowna 04:58:41 -9.1 NT Up 12.0 123.3 Really Low 04:48:12 - 05:09:10 11387
Peachland 04:58:40 -9.1 NT Up 11.9 123.0 Really Low 04:48:11 - 05:09:09 11374
Summerland 04:58:42 -9.2 NT Up 12.1 123.1 Really Low 04:48:13 - 05:09:11 11364
Penticton 04:58:40 -9.3 NT Up 12.2 123.1 Really Low 04:48:11 - 05:09:09 11361
Oliver 04:58:42 -9.6 NT Up 12.4 123.1 Really Low 04:48:13 - 05:09:11 11335
Anarchist Mountain Observatory 04:58:43 -9.8 NT Up 12.6 123.2 Really Low 04:48:14 - 05:09:12 11327
Okanogan 04:58:44 -10.2 NT Up 12.8 122.9 Really Low 04:48:15 - 05:09:13 11274
Brewster 04:58:45 -10.3 NT Up 12.8 122.7 Really Low 04:48:16 - 05:09:14 11250
Manson/Chelan 04:58:46 -10.3 NT Up 12.7 122.4 Really Low 04:48:17 - 05:09:15 11227
Victoria 04:58:49 -8.4 NT Up 10.6 119.8 Really Low 04:48:20 - 05:09:18 11216
Wenatchee 04:58:48 -10.6 NT Up 12.9 122.1 Really Low 04:48:19 - 05:09:17 11188
Ellensburg 04:58:49 -10.8 NT Up 13.0 121.9 Really Low 04:48:20 - 05:09:18 11152
Yakima 04:58:50 -11.1 NT Up 13.2 121.8 Really Low 04:48:21 - 05:09:19 11120
PNWRO 04:58:49 -12.3 AT Up 14.5 123.0 Really Low 04:48:20 - 05:09:18 11107
Toppenish/White Swan 04:58:50 -11.3 NT Up 13.4 121.9 Really Low 04:48:21 - 05:09:19 11106
The Dalles 04:58:53 -11.5 NT Up 13.4 121.1 Really Low 04:48:24 - 05:09:22 11030
Maupin 04:58:53 -11.9 NT Up 13.6 121.1 Really Low 04:48:24 - 05:09:22 10999
Dunrhomin 04:58:29 -22.8 Dark Up 25.9 133.0 Low 04:48:00 - 05:08:58 10932
Sisters 04:58:56 -12.3 AT Up 13.8 120.5 Really Low 04:48:27 - 05:09:25 10919
Nikitin 04:58:31 -22.9 Dark Up 26.0 132.9 Low 04:48:02 - 05:09:00 10917
CU-SBO 04:58:31 -22.9 Dark Up 26.0 132.8 Low 04:48:02 - 05:09:00 10910
Bend 04:58:56 -12.6 AT Up 14.1 120.7 Really Low 04:48:27 - 05:09:25 10905
Oregon Observatory 04:58:57 -12.7 AT Up 14.1 120.5 Really Low 04:48:28 - 05:09:26 10888
Chiloquin 04:59:00 -13.4 AT Up 14.5 119.9 Really Low 04:48:31 - 05:09:29 10771
Klamath Falls 04:59:01 -13.7 AT Up 14.7 119.9 Really Low 04:48:32 - 05:09:30 10744
Cedarville 04:59:01 -15.0 AT Up 16.1 121.0 Really Low 04:48:32 - 05:09:30 10719
Fall River/Burney 04:59:02 -14.8 AT Up 15.6 119.9 Really Low 04:48:33 - 05:09:31 10653
Gimple 04:59:04 -15.7 AT Up 16.4 120.1 Really Low 04:48:35 - 05:09:33 10587
Greenville 04:59:05 -15.7 AT Up 16.3 120.1 Really Low 04:48:36 - 05:09:34 10585
Quincy 04:59:04 -15.8 AT Up 16.4 120.0 Really Low 04:48:35 - 05:09:33 10568
Portola 04:59:03 -16.2 AT Up 16.8 120.3 Really Low 04:48:34 - 05:09:32 10567
Reno 04:59:04 -16.7 AT Up 17.4 120.8 Really Low 04:48:35 - 05:09:33 10558
Carson City 04:59:04 -17.0 AT Up 17.6 120.7 Really Low 04:48:35 - 05:09:33 10528
Yerington 04:59:04 -17.4 AT Up 18.1 121.1 Really Low 04:48:35 - 05:09:33 10525
Gardnerville 04:59:04 -17.2 AT Up 17.7 120.7 Really Low 04:48:35 - 05:09:33 10508
Hawthorne 04:59:02 -18.1 Dark Up 18.7 121.4 Really Low 04:48:33 - 05:09:31 10496
Lee Vining 04:59:04 -18.2 Dark Up 18.7 120.9 Really Low 04:48:35 - 05:09:33 10436
Bishop 04:59:05 -19.1 Dark Up 19.5 121.2 Really Low 04:48:36 - 05:09:34 10400
Beatty 04:59:02 -20.3 Dark Up 20.8 122.3 Low 04:48:33 - 05:09:31 10395
Patrick 04:58:58 -22.9 Dark Up 23.6 124.0 Low 04:48:29 - 05:09:27 10329
Laughlin/Bullhead City 04:59:00 -22.7 Dark Up 23.2 123.4 Low 04:48:31 - 05:09:29 10291
Lake Havasu City 04:59:00 -23.4 Dark Up 23.8 123.3 Low 04:48:31 - 05:09:29 10236
George/Scottsdale 04:58:55 -25.2 Dark Up 25.9 124.9 Low 04:48:26 - 05:09:24 10224
Idyllwild 04:59:06 -22.7 Dark Up 22.5 121.3 Low 04:48:37 - 05:09:35 10113
Wildwood 04:59:08 -21.3 Dark Up 21.0 120.0 Low 04:48:39 - 05:09:37 10102
Calipatria 04:59:05 -23.8 Dark Up 23.7 121.9 Low 04:48:36 - 05:09:34 10084
Yuma 04:59:04 -24.6 Dark Up 24.5 122.4 Low 04:48:35 - 05:09:33 10066

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 26181, (2029/05/25 04:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.11  41
13Zet Oph      16:37:09.6 -10:34:01  2.6  5.22  44
PPM 232375     16:57:26.0 -10:57:50  6.3  0.32  48
PPM 232398     16:58:12.2 -10:32:45  7.8  0.20  49
26181          16:58:23.2 -10:44:38 16.5        49
Positions are for J2000

Event circumstances last updated at 2024/06/26 21:35:47 UT

Marc W. Buie, Southwest Research Institute

RECON