RECON: TNO occultation with 24835

Event between (24835) 95SM55 and star GA1320:01827477 with event index number of 2529774

Geocentric closest approach at 2028/12/09 05:57:12 UTC

J2000 position of star is 04:22:51.2 +43:56:18
Equinox of date position of star is 04:24:33.4 +43:59:34
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 98 degrees from the moon. Moon is 50% illuminated.
Apparent brightness V=20.4

[RECON map]
Object is 37.6 AU from the Sun and 36.7 AU from the Earth.
Apparent velocity is 25.2 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 155 seconds.
The 1-sigma cross-track error in the shadow position is 2507 km.
The sky-plane scale is 26605.6 km/arcsec.

The object has an absolute magnitude Hv=4.6
Diameter=704.7 km assuming a 5% albedo -- 28.2 sec chord
Diameter=287.7 km assuming a 30% albedo -- 11.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 24835, (2028/12/09 06:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:35.1 +16:33:55  0.8 27.57  98
Mirphak        03:26:24.3 +49:57:42  1.8 11.59 106
PPM 046963     04:20:08.9 +42:12:34  6.1  1.99  99
PPM 047025     04:24:39.9 +43:30:54  7.7  0.49  98
PPM 047019     04:23:49.5 +44:09:58  9.7  0.25  98
24835          04:24:54.3 +44:00:14 14.1        97
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 28.3 km RECON observability=1.0 and success probability=11.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:57:57 -54.2 Dark Down 76.1 111.9 Up 05:44:32 - 06:11:23 4919
Kelowna 05:57:56 -55.2 Dark Down 76.9 110.3 Up 05:44:31 - 06:11:22 4812
Peachland 05:57:57 -55.1 Dark Down 76.7 109.3 Up 05:44:31 - 06:11:22 4809
Summerland 05:57:58 -55.3 Dark Down 76.9 108.9 Up 05:44:32 - 06:11:23 4791
Victoria 05:58:09 -54.0 Dark Down 74.8 99.6 Up 05:44:43 - 06:11:34 4786
Penticton 05:57:57 -55.4 Dark Down 76.9 108.8 Up 05:44:32 - 06:11:23 4781
Sleaford 05:57:17 -58.7 Dark Down 81.5 161.2 Up 05:43:52 - 06:10:43 4772
Oliver 05:57:57 -55.6 Dark Down 77.1 107.3 Up 05:44:32 - 06:11:23 4745
Anarchist Mountain Observatory 05:57:58 -55.8 Dark Down 77.2 106.9 Up 05:44:32 - 06:11:23 4723
Okanogan 05:57:59 -56.1 Dark Down 77.3 103.9 Up 05:44:34 - 06:11:25 4662
Brewster 05:58:00 -56.2 Dark Down 77.2 102.4 Up 05:44:34 - 06:11:25 4640
Manson/Chelan 05:58:01 -56.1 Dark Down 77.0 101.0 Up 05:44:36 - 06:11:27 4629
Wenatchee 05:58:02 -56.3 Dark Down 77.0 98.8 Up 05:44:37 - 06:11:28 4585
Ellensburg 05:58:04 -56.4 Dark Down 76.9 96.8 Up 05:44:39 - 06:11:30 4548
Yakima 05:58:05 -56.6 Dark Down 76.9 95.1 Up 05:44:39 - 06:11:30 4507
Toppenish/White Swan 05:58:05 -56.9 Dark Down 77.0 94.3 Up 05:44:39 - 06:11:30 4480
The Dalles 05:58:08 -56.9 Dark Down 76.5 90.3 Up 05:44:43 - 06:11:34 4423
PNWRO 05:58:01 -57.9 Dark Down 78.1 94.0 Up 05:44:36 - 06:11:27 4400
Maupin 05:58:09 -57.1 Dark Down 76.6 88.6 Up 05:44:43 - 06:11:34 4377
Sisters 05:58:12 -57.3 Dark Down 76.2 84.7 Up 05:44:46 - 06:11:37 4302
Bend 05:58:11 -57.6 Dark Down 76.4 83.9 Up 05:44:45 - 06:11:36 4270
Oregon Observatory 05:58:11 -57.6 Dark Down 76.3 83.1 Up 05:44:46 - 06:11:37 4256
Chiloquin 05:58:15 -58.0 Dark Down 75.8 77.8 Up 05:44:50 - 06:11:41 4134
Klamath Falls 05:58:15 -58.2 Dark Down 75.7 76.5 Up 05:44:50 - 06:11:41 4096
Cedarville 05:58:12 -59.6 Dark Down 76.7 73.6 Up 05:44:46 - 06:11:37 3974
Fall River/Burney 05:58:16 -59.0 Dark Down 75.7 72.0 Up 05:44:51 - 06:11:42 3963
Greenville 05:58:17 -59.7 Dark Down 75.7 68.5 Up 05:44:51 - 06:11:42 3855
Gimple 05:58:16 -59.8 Dark Down 75.8 68.4 Up 05:44:51 - 06:11:42 3852
Quincy 05:58:16 -59.8 Dark Down 75.6 67.8 Up 05:44:51 - 06:11:42 3834
Portola 05:58:15 -60.2 Dark Down 75.9 67.0 Up 05:44:50 - 06:11:41 3806
Reno 05:58:14 -60.8 Dark Down 76.3 65.7 Up 05:44:48 - 06:11:39 3758
Carson City 05:58:14 -60.9 Dark Down 76.1 64.3 Up 05:44:49 - 06:11:40 3720
Gardnerville 05:58:14 -61.1 Dark Down 76.1 63.4 Up 05:44:49 - 06:11:40 3694
Yerington 05:58:13 -61.5 Dark Down 76.5 63.1 Up 05:44:47 - 06:11:38 3680
Hawthorne 05:58:12 -62.0 Dark Down 76.6 60.9 Up 05:44:46 - 06:11:37 3616
Lee Vining 05:58:14 -61.9 Dark Down 76.0 59.4 Up 05:44:48 - 06:11:39 3572
Bishop 05:58:13 -62.7 Dark Down 76.2 56.5 Up 05:44:47 - 06:11:38 3488
Dunrhomin 05:57:26 -69.0 Dark Down 85.7 30.2 Up 05:44:01 - 06:10:52 3477
Nikitin 05:57:26 -69.1 Dark Down 85.5 29.2 Up 05:44:01 - 06:10:52 3458
CU-SBO 05:57:27 -69.2 Dark Down 85.4 29.4 Up 05:44:01 - 06:10:52 3452
Beatty 05:58:08 -64.1 Dark Down 77.0 52.8 Up 05:44:42 - 06:11:33 3390
Wildwood 05:58:18 -63.7 Dark Down 74.0 47.1 Up 05:44:52 - 06:11:43 3156
Patrick 05:58:00 -66.8 Dark Down 77.7 42.7 Up 05:44:35 - 06:11:26 3152
Laughlin/Bullhead City 05:58:03 -66.4 Dark Down 77.1 43.4 Up 05:44:38 - 06:11:29 3146
Lake Havasu City 05:58:03 -66.9 Dark Down 76.8 40.9 Up 05:44:37 - 06:11:28 3068
Idyllwild 05:58:12 -65.3 Dark Down 74.9 43.3 Up 05:44:47 - 06:11:38 3059
Calipatria 05:58:09 -66.5 Dark Down 75.1 39.7 Up 05:44:43 - 06:11:34 2960
George/Scottsdale 05:57:55 -69.0 Dark Down 77.4 33.2 Up 05:44:30 - 06:11:21 2920
Yuma 05:58:06 -67.3 Dark Down 75.2 37.0 Up 05:44:41 - 06:11:32 2889

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 24835, (2028/12/09 06:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 27.57  98
Mirphak        03:24:19.4 +49:51:40  1.8 11.59 106
PPM 046963     04:18:08.2 +42:08:27  6.1  1.99  99
PPM 047025     04:22:37.4 +43:26:57  7.7  0.49  98
PPM 047019     04:21:46.4 +44:05:59  9.7  0.25  98
24835          04:22:51.2 +43:56:18 14.1        98
Positions are for J2000

Event circumstances last updated at 2024/01/09 22:28:52 UT

Marc W. Buie, Southwest Research Institute

RECON