RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA0960:00763676 with event index number of 2656121

Geocentric closest approach at 2027/01/21 02:53:55 UTC

J2000 position of star is 05:27:50.6 +07:12:31
Equinox of date position of star is 05:29:10.0 +07:13:39
Stellar brightness G=13.6, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 27 degrees from the moon. Moon is 97% illuminated.
Apparent brightness V=18.6

[RECON map]
Object is 10.2 AU from the Sun and 9.5 AU from the Earth.
Apparent velocity is 31.0 km/sec on the sky relative to the star, or, 16.3 arcsec/hr.
The 1-sigma error in the time of the event is 15 seconds.
The 1-sigma cross-track error in the shadow position is 1259 km.
The sky-plane scale is 6854.6 km/arcsec.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 4.3 sec chord
Diameter=52.4 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2027/01/21 02:54UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:38.2 +07:24:35  0.4  6.78  23
Bellatrix      05:26:35.0 +06:22:19  1.6  1.09  28
PPM 148951     05:28:06.3 +06:53:23  6.5  0.45  28
PPM 148965     05:28:27.7 +07:11:28  7.0  0.21  27
468861         05:29:18.4 +07:13:46 13.6        27
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 22.6 km RECON observability=1.0 and success probability=0.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 02:54:47 -21.9 Dark Up 36.2 130.3 Up 02:53:01 - 02:56:34 6262
Kelowna 02:54:48 -22.4 Dark Up 37.1 130.8 Up 02:53:01 - 02:56:34 6192
Peachland 02:54:48 -22.2 Dark Up 37.0 130.4 Up 02:53:02 - 02:56:35 6190
Summerland 02:54:48 -22.3 Dark Up 37.2 130.4 Up 02:53:02 - 02:56:35 6178
Penticton 02:54:48 -22.3 Dark Up 37.3 130.5 Up 02:53:02 - 02:56:35 6172
Victoria 02:54:57 -19.7 Dark Up 35.9 125.9 Up 02:53:11 - 02:56:44 6165
Oliver 02:54:49 -22.3 Dark Up 37.5 130.3 Up 02:53:03 - 02:56:36 6147
Anarchist Mountain Observatory 02:54:49 -22.4 Dark Up 37.7 130.4 Up 02:53:03 - 02:56:36 6133
Sleaford 02:54:18 -30.8 Dark Up 41.0 147.6 Up 02:52:32 - 02:56:05 6131
Okanogan 02:54:51 -22.2 Dark Up 38.0 129.8 Up 02:53:04 - 02:56:37 6091
Brewster 02:54:52 -22.1 Dark Up 38.1 129.4 Up 02:53:05 - 02:56:38 6075
Manson/Chelan 02:54:53 -21.8 Dark Up 38.0 128.9 Up 02:53:06 - 02:56:39 6066
Wenatchee 02:54:54 -21.6 Dark Up 38.3 128.4 Up 02:53:08 - 02:56:41 6035
Ellensburg 02:54:56 -21.4 Dark Up 38.4 128.0 Up 02:53:09 - 02:56:42 6010
Yakima 02:54:56 -21.4 Dark Up 38.6 127.7 Up 02:53:10 - 02:56:43 5980
Toppenish/White Swan 02:54:57 -21.5 Dark Up 38.9 127.7 Up 02:53:10 - 02:56:43 5962
The Dalles 02:55:00 -20.8 Dark Up 38.9 126.4 Up 02:53:13 - 02:56:46 5918
PNWRO 02:54:54 -22.5 Dark Up 39.9 129.1 Up 02:53:08 - 02:56:41 5909
Maupin 02:55:00 -20.9 Dark Up 39.2 126.2 Up 02:53:14 - 02:56:47 5886
Sisters 02:55:03 -20.4 Dark Up 39.4 125.2 Up 02:53:17 - 02:56:50 5829
Bend 02:55:03 -20.5 Dark Up 39.7 125.3 Up 02:53:17 - 02:56:50 5806
Oregon Observatory 02:55:04 -20.4 Dark Up 39.8 125.0 Up 02:53:18 - 02:56:51 5796
Chiloquin 02:55:07 -19.9 Dark Up 40.3 123.7 Up 02:53:21 - 02:56:54 5702
Klamath Falls 02:55:08 -19.9 Dark Up 40.5 123.5 Up 02:53:21 - 02:56:54 5674
Cedarville 02:55:06 -21.0 Dark Up 41.9 124.7 Up 02:53:20 - 02:56:53 5589
Fall River/Burney 02:55:09 -20.0 Dark Up 41.4 123.1 Up 02:53:23 - 02:56:56 5573
Greenville 02:55:10 -20.2 Dark Up 42.2 122.9 Up 02:53:24 - 02:56:57 5492
Gimple 02:55:10 -20.3 Dark Up 42.2 122.9 Up 02:53:24 - 02:56:57 5490
Quincy 02:55:11 -20.2 Dark Up 42.3 122.7 Up 02:53:25 - 02:56:58 5475
Portola 02:55:10 -20.5 Dark Up 42.7 123.1 Up 02:53:24 - 02:56:57 5456
Reno 02:55:09 -21.0 Dark Up 43.2 123.6 Up 02:53:23 - 02:56:56 5422
Carson City 02:55:10 -20.9 Dark Up 43.4 123.3 Up 02:53:23 - 02:56:56 5392
Gardnerville 02:55:10 -20.9 Dark Up 43.6 123.2 Up 02:53:24 - 02:56:57 5371
Yerington 02:55:09 -21.4 Dark Up 44.0 123.8 Up 02:53:22 - 02:56:55 5363
Hawthorne 02:55:09 -21.7 Dark Up 44.6 124.0 Up 02:53:22 - 02:56:55 5314
Lee Vining 02:55:11 -21.3 Dark Up 44.6 123.0 Up 02:53:24 - 02:56:57 5277
Bishop 02:55:10 -21.7 Dark Up 45.4 123.3 Up 02:53:24 - 02:56:57 5212
Dunrhomin 02:54:35 -32.1 Dark Up 51.0 141.6 Up 02:52:48 - 02:56:21 5199
Nikitin 02:54:35 -32.1 Dark Up 51.1 141.4 Up 02:52:49 - 02:56:22 5184
CU-SBO 02:54:35 -32.1 Dark Up 51.1 141.3 Up 02:52:49 - 02:56:22 5180
Beatty 02:55:07 -23.0 Dark Up 46.7 124.6 Up 02:53:21 - 02:56:54 5139
Patrick 02:55:03 -25.1 Dark Up 49.5 126.5 Up 02:53:17 - 02:56:50 4950
Laughlin/Bullhead City 02:55:05 -24.5 Dark Up 49.1 125.4 Up 02:53:19 - 02:56:52 4943
Wildwood 02:55:17 -21.0 Dark Up 47.0 120.2 Up 02:53:30 - 02:57:03 4931
Lake Havasu City 02:55:06 -24.6 Dark Up 49.7 125.1 Up 02:53:19 - 02:56:52 4878
Idyllwild 02:55:13 -22.5 Dark Up 48.5 121.8 Up 02:53:27 - 02:57:00 4861
Calipatria 02:55:11 -23.4 Dark Up 49.6 122.4 Up 02:53:24 - 02:56:57 4780
George/Scottsdale 02:55:01 -26.5 Dark Up 51.8 127.1 Up 02:53:15 - 02:56:48 4757
Yuma 02:55:10 -24.1 Dark Up 50.5 123.0 Up 02:53:23 - 02:56:56 4722

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 468861, (2027/01/21 02:54UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.78  23
Bellatrix      05:25:07.8 +06:20:58  1.6  1.09  28
PPM 148951     05:26:38.8 +06:52:06  6.5  0.45  28
PPM 148965     05:27:00.0 +07:10:12  7.0  0.21  27
468861         05:27:50.6 +07:12:31 13.6        27
Positions are for J2000

Event circumstances last updated at 2024/06/20 21:26:18 UT

Marc W. Buie, Southwest Research Institute

RECON