RECON: TNO occultation with 341275

Event between (341275) 07RG283 and star GA1180:03096034 with event index number of 2200581

Geocentric closest approach at 2025/02/03 07:19:01 UTC

J2000 position of star is 07:59:32.7 +29:08:13
Equinox of date position of star is 08:01:02.6 +29:04:10
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 98 degrees from the moon. Moon is 28% illuminated.
Apparent brightness V=20.3

[RECON map]
Object is 15.4 AU from the Sun and 14.4 AU from the Earth.
Apparent velocity is 21.9 km/sec on the sky relative to the star, or, 7.5 arcsec/hr.
The 1-sigma error in the time of the event is 34 seconds.
The 1-sigma cross-track error in the shadow position is 680 km.
The sky-plane scale is 10472.8 km/arcsec.

The object has an absolute magnitude Hv=8.4
Diameter=118.6 km assuming a 5% albedo -- 5.7 sec chord
Diameter=48.4 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 341275, (2025/02/03 07:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:51.0 +27:57:49  1.1  3.32  95
PPM 098327     08:07:09.0 +27:27:25  6.1  2.09  99
PPM 098216     08:02:05.1 +29:08:05  7.9  0.23  98
PPM 098196     08:01:00.2 +28:53:37  9.7  0.17  98
341275         08:01:06.1 +29:04:01 15.6        98
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 39.2 km RECON observability=1.0 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 07:18:03 -54.3 Dark Down 63.7 216.1 Up 07:14:42 - 07:21:25 4381
Kamloops 07:18:48 -53.9 Dark Down 68.3 187.5 Up 07:15:26 - 07:22:09 4189
Kelowna 07:18:45 -54.9 Dark Down 69.0 190.0 Up 07:15:23 - 07:22:06 4104
Peachland 07:18:46 -54.9 Dark Down 69.2 189.3 Up 07:15:24 - 07:22:07 4093
Summerland 07:18:45 -55.1 Dark Down 69.3 189.6 Up 07:15:23 - 07:22:06 4078
Penticton 07:18:45 -55.2 Dark Down 69.4 189.9 Up 07:15:23 - 07:22:06 4071
Oliver 07:18:45 -55.5 Dark Down 69.7 190.0 Up 07:15:23 - 07:22:06 4034
Anarchist Mountain Observatory 07:18:44 -55.7 Dark Down 69.9 190.6 Up 07:15:23 - 07:22:06 4016
Victoria 07:18:58 -55.0 Dark Down 70.6 180.4 Up 07:15:36 - 07:22:19 3971
Okanogan 07:18:45 -56.2 Dark Down 70.5 190.4 Up 07:15:23 - 07:22:06 3948
Brewster 07:18:46 -56.4 Dark Down 70.8 190.0 Up 07:15:24 - 07:22:07 3920
Manson/Chelan 07:18:47 -56.5 Dark Down 71.1 189.1 Up 07:15:25 - 07:22:08 3898
Wenatchee 07:18:47 -56.9 Dark Down 71.6 188.9 Up 07:15:26 - 07:22:09 3848
Ellensburg 07:18:48 -57.2 Dark Down 72.0 188.5 Up 07:15:27 - 07:22:10 3805
Yakima 07:18:48 -57.6 Dark Down 72.4 188.6 Up 07:15:27 - 07:22:10 3762
Toppenish/White Swan 07:18:48 -57.8 Dark Down 72.6 189.2 Up 07:15:26 - 07:22:09 3739
PNWRO 07:18:42 -58.6 Dark Down 72.7 193.7 Up 07:15:21 - 07:22:04 3699
The Dalles 07:18:50 -58.3 Dark Down 73.4 187.3 Up 07:15:29 - 07:22:12 3657
Maupin 07:18:50 -58.7 Dark Down 73.8 187.8 Up 07:15:28 - 07:22:11 3612
Sisters 07:18:52 -59.3 Dark Down 74.8 186.6 Up 07:15:30 - 07:22:13 3519
Bend 07:18:51 -59.6 Dark Down 75.0 187.6 Up 07:15:29 - 07:22:12 3493
Oregon Observatory 07:18:51 -59.7 Dark Down 75.2 187.2 Up 07:15:30 - 07:22:13 3475
Chiloquin 07:18:53 -60.7 Dark Down 76.5 186.4 Up 07:15:32 - 07:22:15 3333
Klamath Falls 07:18:53 -61.0 Dark Down 76.8 186.8 Up 07:15:31 - 07:22:14 3296
Cedarville 07:18:47 -62.2 Dark Down 77.3 193.5 Up 07:15:25 - 07:22:08 3218
Fall River/Burney 07:18:51 -62.1 Dark Down 78.0 189.1 Up 07:15:30 - 07:22:13 3168
Dunrhomin 07:17:50 -66.2 Dark Down 71.5 238.8 Up 07:14:29 - 07:21:12 3143
Nikitin 07:17:50 -66.3 Dark Down 71.6 239.2 Up 07:14:29 - 07:21:12 3123
CU-SBO 07:17:50 -66.4 Dark Down 71.7 239.2 Up 07:14:29 - 07:21:12 3115
Greenville 07:18:50 -63.1 Dark Down 78.8 191.7 Up 07:15:28 - 07:22:11 3068
Gimple 07:18:49 -63.1 Dark Down 78.8 192.1 Up 07:15:28 - 07:22:11 3068
Quincy 07:18:50 -63.2 Dark Down 79.0 192.0 Up 07:15:28 - 07:22:11 3046
Portola 07:18:48 -63.5 Dark Down 79.0 194.2 Up 07:15:27 - 07:22:10 3032
Reno 07:18:46 -64.0 Dark Down 79.2 197.5 Up 07:15:24 - 07:22:07 3002
Carson City 07:18:45 -64.3 Dark Down 79.5 198.2 Up 07:15:24 - 07:22:07 2963
Yerington 07:18:43 -64.8 Dark Down 79.5 201.4 Up 07:15:21 - 07:22:04 2941
Gardnerville 07:18:45 -64.6 Dark Down 79.7 198.8 Up 07:15:24 - 07:22:07 2936
Hawthorne 07:18:41 -65.4 Dark Down 79.8 204.8 Up 07:15:19 - 07:22:02 2890
Lee Vining 07:18:43 -65.7 Dark Down 80.4 203.8 Up 07:15:21 - 07:22:04 2828
Bishop 07:18:40 -66.5 Dark Down 80.7 208.9 Up 07:15:18 - 07:22:01 2763
Beatty 07:18:33 -67.5 Dark Down 80.4 217.9 Up 07:15:12 - 07:21:55 2713
Patrick 07:18:21 -69.8 Dark Down 79.8 234.8 Up 07:15:00 - 07:21:43 2557
Laughlin/Bullhead City 07:18:24 -69.8 Dark Down 80.4 233.7 Up 07:15:03 - 07:21:46 2527
Lake Havasu City 07:18:23 -70.5 Dark Down 80.6 237.8 Up 07:15:01 - 07:21:44 2454
Wildwood 07:18:41 -69.1 Dark Down 83.5 221.4 Up 07:15:19 - 07:22:02 2402
George/Scottsdale 07:18:12 -71.9 Dark Down 79.1 248.2 Up 07:14:51 - 07:21:34 2378
Idyllwild 07:18:33 -70.3 Dark Down 82.6 233.3 Up 07:15:11 - 07:21:54 2364
Calipatria 07:18:28 -71.3 Dark Down 82.1 241.7 Up 07:15:06 - 07:21:49 2299
Yuma 07:18:24 -72.0 Dark Down 81.7 247.1 Up 07:15:02 - 07:21:45 2254

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 341275, (2025/02/03 07:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  3.32  95
PPM 098327     08:05:37.0 +27:31:49  6.1  2.09  99
PPM 098216     08:00:31.8 +29:12:19  7.9  0.23  98
PPM 098196     07:59:27.0 +28:57:49  9.7  0.17  98
341275         07:59:32.7 +29:08:13 15.6        98
Positions are for J2000

Event circumstances last updated at 2024/03/04 05:30:13 UT

Marc W. Buie, Southwest Research Institute

RECON