RECON: TNO occultation with 612524

Event between (612524) 02VD130 and star GA1140:03010200 with event index number of 2814205

Geocentric closest approach at 2025/01/04 11:08:48 UTC

J2000 position of star is 07:33:03.4 +25:36:57
Equinox of date position of star is 07:34:25.2 +25:33:59
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=22.4

[RECON map]
TNO is 32.8 AU from the Sun and 31.8 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 472 seconds.
The 1-sigma cross-track error in the shadow position is 4064 km.
The sky-plane scale is 23076.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=206.1 km assuming a 5% albedo -- 8.5 sec chord
Diameter=84.1 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 2:1E+4:2II
 
 
 
 
 
 

Star training set for 612524, (2025/01/04 11:09UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:50.7 +27:57:49  1.1  3.64 132
69Ups Gem      07:37:27.6 +26:50:17  4.1  1.43 130
PPM 097667     07:34:44.6 +26:03:30  8.5  0.50 129
PPM 097624     07:33:13.2 +25:44:10  9.8  0.35 129
PPM 097669     07:34:51.5 +25:40:26 10.5  0.13 130
612524         07:34:35.0 +25:33:37 15.0       130
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 1.9 sigma about the mid-time.
The median site spacing is 21.9 km RECON observability=1.0 and success probability=11.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:07:09 -36.2 Dark Down 43.1 256.3 Up 10:52:09 - 11:22:09 -1963
Kamloops 11:07:31 -45.2 Dark Down 51.9 243.1 Up 10:52:31 - 11:22:31 -2493
Kelowna 11:07:28 -45.0 Dark Down 51.8 245.0 Up 10:52:28 - 11:22:28 -2535
Peachland 11:07:27 -45.2 Dark Down 52.0 244.8 Up 10:52:27 - 11:22:27 -2553
Summerland 11:07:27 -45.2 Dark Down 52.0 245.1 Up 10:52:27 - 11:22:27 -2563
Penticton 11:07:27 -45.1 Dark Down 52.0 245.3 Up 10:52:27 - 11:22:27 -2565
Oliver 11:07:26 -45.3 Dark Down 52.1 245.7 Up 10:52:26 - 11:22:26 -2595
Anarchist Mountain Observatory 11:07:25 -45.2 Dark Down 52.1 246.1 Up 10:52:25 - 11:22:25 -2603
Tonasket 11:07:24 -45.3 Dark Down 52.3 246.4 Up 10:52:24 - 11:22:24 -2632
Okanogan 11:07:24 -45.6 Dark Down 52.5 246.6 Up 10:52:24 - 11:22:24 -2665
Brewster 11:07:23 -45.8 Dark Down 52.7 246.7 Up 10:52:23 - 11:22:23 -2694
Manson/Chelan 11:07:23 -46.1 Dark Down 53.0 246.6 Up 10:52:23 - 11:22:23 -2722
Victoria 11:07:33 -47.9 Dark Down 54.7 242.1 Up 10:52:33 - 11:22:33 -2761
Wenatchee 11:07:22 -46.3 Dark Down 53.3 247.0 Up 10:52:22 - 11:22:22 -2768
Ellensburg 11:07:22 -46.6 Dark Down 53.6 247.2 Up 10:52:22 - 11:22:22 -2810
PNWRO 11:07:16 -45.8 Dark Down 52.9 250.2 Up 10:52:16 - 11:22:16 -2846
Yakima 11:07:21 -46.7 Dark Down 53.8 247.7 Up 10:52:21 - 11:22:21 -2846
Toppenish/White Swan 11:07:20 -46.7 Dark Down 53.8 248.2 Up 10:52:20 - 11:22:20 -2860
Dunrhomin 11:06:30 -36.8 Dark Down 44.3 268.0 Up 10:51:30 - 11:21:30 -2869
CU-SBO 11:06:29 -36.9 Dark Down 44.4 268.2 Up 10:51:29 - 11:21:29 -2894
Goldendale 11:07:20 -47.1 Dark Down 54.2 248.4 Up 10:52:20 - 11:22:20 -2921
The Dalles 11:07:20 -47.5 Dark Down 54.6 248.3 Up 10:52:20 - 11:22:20 -2952
Maupin 11:07:19 -47.5 Dark Down 54.7 249.0 Up 10:52:19 - 11:22:19 -2986
Sisters 11:07:17 -48.1 Dark Down 55.3 249.6 Up 10:52:17 - 11:22:17 -3080
Bend 11:07:16 -48.0 Dark Down 55.2 250.2 Up 10:52:16 - 11:22:16 -3093
Oregon Observatory 11:07:16 -48.1 Dark Down 55.4 250.3 Up 10:52:16 - 11:22:16 -3112
North Lake 11:07:13 -47.9 Dark Down 55.2 251.7 Up 10:52:13 - 11:22:13 -3153
Lakeview 11:07:09 -47.8 Dark Down 55.1 253.7 Up 10:52:09 - 11:22:09 -3231
Chiloquin 11:07:14 -48.8 Dark Down 56.1 251.7 Up 10:52:14 - 11:22:14 -3245
Klamath Falls 11:07:12 -48.8 Dark Down 56.1 252.3 Up 10:52:12 - 11:22:12 -3274
Cedarville 11:07:07 -47.8 Dark Down 55.2 254.8 Up 10:52:07 - 11:22:07 -3285
Fall River/Burney 11:07:09 -48.8 Dark Down 56.2 254.3 Up 10:52:09 - 11:22:09 -3370
Susanville 11:07:05 -48.4 Dark Down 55.8 255.9 Up 10:52:05 - 11:22:05 -3404
Gimple 11:07:05 -48.6 Dark Down 56.1 256.1 Up 10:52:05 - 11:22:05 -3436
Greenville 11:07:06 -48.7 Dark Down 56.1 256.0 Up 10:52:06 - 11:22:06 -3439
Portola 11:07:04 -48.4 Dark Down 55.8 256.9 Up 10:52:04 - 11:22:04 -3453
Reno 11:07:01 -47.9 Dark Down 55.4 257.9 Up 10:52:01 - 11:22:01 -3456
Quincy 11:07:05 -48.7 Dark Down 56.2 256.3 Up 10:52:05 - 11:22:05 -3458
Yerington 11:06:58 -47.5 Dark Down 55.0 259.2 Up 10:51:58 - 11:21:58 -3485
Carson City 11:07:00 -48.0 Dark Down 55.5 258.4 Up 10:52:00 - 11:22:00 -3489
Tonopah 11:06:51 -46.2 Dark Down 53.7 262.0 Up 10:51:51 - 11:21:51 -3503
Gardnerville 11:07:00 -48.0 Dark Down 55.5 258.8 Up 10:52:00 - 11:22:00 -3510
Hawthorne 11:06:56 -47.2 Dark Down 54.7 260.3 Up 10:51:56 - 11:21:56 -3510
Lee Vining 11:06:55 -47.7 Dark Down 55.2 260.7 Up 10:51:55 - 11:21:55 -3579
Indian Springs 11:06:43 -45.1 Dark Down 52.7 265.1 Up 10:51:43 - 11:21:43 -3586
Beatty 11:06:47 -45.9 Dark Down 53.5 263.9 Up 10:51:47 - 11:21:47 -3595
Bishop 11:06:53 -47.2 Dark Down 54.7 262.1 Up 10:51:53 - 11:21:53 -3610
Henderson 11:06:40 -44.6 Dark Down 52.2 266.3 Up 10:51:40 - 11:21:40 -3610
Patrick 11:06:36 -43.7 Dark Down 51.3 267.7 Up 10:51:36 - 11:21:36 -3627
Kingman/Dolan Springs 11:06:36 -43.9 Dark Down 51.5 267.9 Up 10:51:36 - 11:21:36 -3654
Laughlin/Bullhead City 11:06:37 -44.3 Dark Down 51.9 267.6 Up 10:51:37 - 11:21:37 -3676
Mohave Valley 11:06:36 -44.3 Dark Down 51.9 268.0 Up 10:51:36 - 11:21:36 -3702
George/Scottsdale 11:06:27 -42.1 Dark Down 49.7 271.0 Up 10:51:27 - 11:21:27 -3707
Lake Havasu City 11:06:35 -44.1 Dark Down 51.7 268.6 Up 10:51:35 - 11:21:35 -3730
Parker 11:06:34 -44.1 Dark Down 51.7 269.1 Up 10:51:34 - 11:21:34 -3762
Idyllwild 11:06:39 -46.1 Dark Down 53.7 268.2 Up 10:51:39 - 11:21:39 -3891
Calipatria 11:06:35 -45.1 Dark Down 52.7 269.7 Up 10:51:35 - 11:21:35 -3905
Yuma 11:06:31 -44.4 Dark Down 52.0 270.7 Up 10:51:31 - 11:21:31 -3911
Wildwood 11:06:46 -47.6 Dark Down 55.2 266.6 Up 10:51:46 - 11:21:46 -3927

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 612524, (2025/01/04 11:09UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  3.64 132
69Ups Gem      07:35:55.3 +26:53:42  4.1  1.43 130
PPM 097667     07:33:12.7 +26:06:50  8.5  0.50 129
PPM 097624     07:31:41.4 +25:47:27  9.8  0.35 129
PPM 097669     07:33:19.8 +25:43:46 10.5  0.13 130
612524         07:33:03.4 +25:36:57 15.0       129
Positions are for J2000

Event circumstances last updated at 2022/05/04 00:01:39 UT

Marc W. Buie, Southwest Research Institute

RECON