RECON: TNO occultation with 250112

Event between (250112) 02KY14 and star GA0900:03356069 with event index number of 2180258

Geocentric closest approach at 2024/01/03 08:40:08 UTC

J2000 position of star is 08:28:07.2 +00:05:01
Equinox of date position of star is 08:29:20.6 +00:00:12
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 57 degrees from the moon. Moon is 58% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 15.2 AU from the Sun and 14.3 AU from the Earth.
Apparent velocity is 21.1 km/sec on the sky relative to the star, or, 7.3 arcsec/hr.
The 1-sigma error in the time of the event is 110 seconds.
The 1-sigma cross-track error in the shadow position is 1079 km.
The sky-plane scale is 10403.9 km/arcsec.

The object has an absolute magnitude Hv=9.7
Diameter=72.4 km assuming a 5% albedo -- 3.2 sec chord
Diameter=29.6 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 250112, (2024/01/03 08:40UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:38.9 +11:50:56  1.3 27.57  34
Alphard        09:28:46.0 -08:45:50  2.0 17.20  43
PPM 177501     08:35:14.4 -02:14:06  6.4  2.68  56
PPM 154514     08:29:28.4 +00:09:46  8.2  0.16  57
PPM 154528     08:29:51.3 +00:04:57  8.8  0.15  57
250112         08:29:21.1 +00:00:10 15.9        57
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 30.8 km RECON observability=1.0 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:40:11 -55.8 Dark Up 38.0 179.5 Up 08:30:33 - 08:49:48 5644
Kamloops 08:40:58 -61.3 Dark Up 37.9 161.3 Up 08:31:20 - 08:50:35 5543
Kelowna 08:40:56 -61.9 Dark Up 38.8 162.2 Up 08:31:18 - 08:50:33 5485
Peachland 08:40:57 -62.1 Dark Up 38.9 161.8 Up 08:31:19 - 08:50:34 5477
Summerland 08:40:57 -62.2 Dark Up 39.1 161.9 Up 08:31:19 - 08:50:34 5467
Penticton 08:40:56 -62.3 Dark Up 39.1 162.0 Up 08:31:19 - 08:50:34 5462
Oliver 08:40:57 -62.6 Dark Up 39.5 161.9 Up 08:31:19 - 08:50:34 5436
Anarchist Mountain Observatory 08:40:56 -62.7 Dark Up 39.7 162.1 Up 08:31:19 - 08:50:34 5424
Victoria 08:41:10 -63.9 Dark Up 39.2 156.9 Up 08:31:33 - 08:50:48 5387
Okanogan 08:40:58 -63.4 Dark Up 40.2 161.7 Up 08:31:20 - 08:50:35 5376
Brewster 08:40:59 -63.7 Dark Up 40.5 161.3 Up 08:31:21 - 08:50:36 5356
Manson/Chelan 08:41:00 -63.9 Dark Up 40.6 160.8 Up 08:31:23 - 08:50:38 5341
Wenatchee 08:41:01 -64.4 Dark Up 41.0 160.5 Up 08:31:24 - 08:50:39 5305
Ellensburg 08:41:02 -64.9 Dark Up 41.3 160.1 Up 08:31:25 - 08:50:40 5274
Yakima 08:41:03 -65.3 Dark Up 41.7 159.9 Up 08:31:25 - 08:50:40 5243
Toppenish/White Swan 08:41:02 -65.4 Dark Up 41.9 160.1 Up 08:31:25 - 08:50:40 5226
PNWRO 08:40:57 -65.4 Dark Up 42.6 161.9 Up 08:31:20 - 08:50:35 5198
The Dalles 08:41:06 -66.3 Dark Up 42.5 158.8 Up 08:31:28 - 08:50:43 5166
Maupin 08:41:06 -66.7 Dark Up 42.9 158.8 Up 08:31:28 - 08:50:43 5133
Sisters 08:41:09 -67.7 Dark Up 43.6 157.9 Up 08:31:31 - 08:50:46 5064
Bend 08:41:08 -67.8 Dark Up 43.9 158.1 Up 08:31:30 - 08:50:45 5045
Oregon Observatory 08:41:09 -68.0 Dark Up 44.0 157.9 Up 08:31:31 - 08:50:46 5031
Chiloquin 08:41:11 -69.4 Dark Up 45.1 156.8 Up 08:31:34 - 08:50:49 4924
Klamath Falls 08:41:11 -69.7 Dark Up 45.5 156.8 Up 08:31:34 - 08:50:49 4896
Cedarville 08:41:06 -69.8 Dark Up 46.5 158.7 Up 08:31:29 - 08:50:44 4839
Fall River/Burney 08:41:11 -70.6 Dark Up 46.6 156.9 Up 08:31:34 - 08:50:49 4798
Dunrhomin 08:40:08 -63.4 Dark Up 49.8 180.5 Up 08:30:31 - 08:49:46 4735
Greenville 08:41:10 -71.3 Dark Up 47.6 157.1 Up 08:31:33 - 08:50:48 4722
Gimple 08:41:10 -71.3 Dark Up 47.6 157.2 Up 08:31:32 - 08:50:47 4722
Nikitin 08:40:08 -63.5 Dark Up 50.0 180.5 Up 08:30:31 - 08:49:46 4719
CU-SBO 08:40:09 -63.6 Dark Up 50.1 180.3 Up 08:30:31 - 08:49:46 4714
Quincy 08:41:10 -71.5 Dark Up 47.8 157.0 Up 08:31:33 - 08:50:48 4705
Portola 08:41:09 -71.5 Dark Up 48.1 157.6 Up 08:31:31 - 08:50:46 4694
Reno 08:41:06 -71.5 Dark Up 48.5 158.4 Up 08:31:29 - 08:50:44 4672
Carson City 08:41:07 -71.8 Dark Up 48.8 158.3 Up 08:31:29 - 08:50:44 4641
Yerington 08:41:04 -71.7 Dark Up 49.2 159.2 Up 08:31:27 - 08:50:42 4624
Gardnerville 08:41:06 -72.0 Dark Up 49.1 158.3 Up 08:31:29 - 08:50:44 4620
Hawthorne 08:41:02 -71.9 Dark Up 49.8 159.7 Up 08:31:25 - 08:50:40 4584
Lee Vining 08:41:05 -72.6 Dark Up 50.2 158.8 Up 08:31:27 - 08:50:42 4535
Bishop 08:41:02 -72.8 Dark Up 50.9 159.6 Up 08:31:25 - 08:50:40 4482
Beatty 08:40:56 -72.3 Dark Up 51.8 161.9 Up 08:31:18 - 08:50:33 4441
Patrick 08:40:45 -71.7 Dark Up 53.8 166.0 Up 08:31:07 - 08:50:22 4308
Laughlin/Bullhead City 08:40:48 -72.3 Dark Up 53.9 164.7 Up 08:31:10 - 08:50:25 4286
Lake Havasu City 08:40:47 -72.6 Dark Up 54.6 164.9 Up 08:31:10 - 08:50:25 4224
Wildwood 08:41:05 -75.4 Dark Up 53.9 157.8 Up 08:31:28 - 08:50:43 4187
Idyllwild 08:40:58 -74.6 Dark Up 54.8 160.6 Up 08:31:20 - 08:50:35 4155
George/Scottsdale 08:40:37 -71.4 Dark Up 55.9 168.8 Up 08:30:59 - 08:50:14 4154
Calipatria 08:40:53 -74.2 Dark Up 55.7 162.3 Up 08:31:15 - 08:50:30 4098
Yuma 08:40:49 -73.8 Dark Up 56.3 163.7 Up 08:31:12 - 08:50:27 4058

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 250112, (2024/01/03 08:40UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 27.57  34
Alphard        09:27:35.2 -08:39:30  2.0 17.20  43
PPM 177501     08:34:01.6 -02:09:06  6.4  2.68  56
PPM 154514     08:28:14.5 +00:14:37  8.2  0.16  57
PPM 154528     08:28:37.4 +00:09:48  8.8  0.15  57
250112         08:28:07.2 +00:05:01 15.9        57
Positions are for J2000

Event circumstances last updated at 2023/11/05 04:14:09 UT

Marc W. Buie, Southwest Research Institute

RECON