RECON: TNO occultation with 508869

Event between (508869) 02VT130 and star GA1140:01930749 with event index number of 2695280

Geocentric closest approach at 2029/02/04 08:44:42 UTC

J2000 position of star is 06:09:47.7 +24:27:32
Equinox of date position of star is 06:11:12.9 +24:27:11
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 67% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 43.4 AU from the Sun and 42.7 AU from the Earth.
Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 394 seconds.
The 1-sigma cross-track error in the shadow position is 1585 km.
The sky-plane scale is 30933.7 km/arcsec.

The object has an absolute magnitude Hv=5.8
Diameter=436.5 km assuming a 5% albedo -- 23.0 sec chord
Diameter=178.2 km assuming a 30% albedo -- 9.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 508869, (2029/02/04 08:51UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:44.9 +07:24:36  0.4 17.41 114
Alhena         06:39:23.5 +16:22:19  1.9 10.37 106
3 Gem          06:11:30.1 +23:06:21  5.5  1.35 113
5 Gem          06:13:19.4 +24:24:40  6.7  0.40 113
PPM 095531     06:11:44.1 +24:36:39  9.6  0.16 113
PPM 095526     06:11:36.7 +24:21:05 10.2  0.10 113
508869         06:11:34.9 +24:27:05 15.7       113
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 2.3 sigma about the mid-time.
The median site spacing is 23.8 km RECON observability=1.0 and success probability=6.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:41:17 -50.4 Dark Up 33.2 268.0 Up 08:26:17 - 08:56:17 5138
Kamloops 08:41:40 -55.0 Dark Up 42.2 256.9 Up 08:26:40 - 08:56:40 4670
Kelowna 08:41:35 -55.7 Dark Up 41.9 258.4 Up 08:26:35 - 08:56:35 4620
Peachland 08:41:36 -55.8 Dark Up 42.1 258.3 Up 08:26:36 - 08:56:36 4604
Summerland 08:41:35 -56.0 Dark Up 42.0 258.5 Up 08:26:35 - 08:56:35 4593
Penticton 08:41:34 -56.0 Dark Up 42.0 258.7 Up 08:26:34 - 08:56:34 4590
Oliver 08:41:33 -56.4 Dark Up 42.1 259.0 Up 08:26:33 - 08:56:33 4559
Anarchist Mountain Observatory 08:41:31 -56.5 Dark Up 42.0 259.3 Up 08:26:31 - 08:56:31 4549
Okanogan 08:41:29 -57.2 Dark Up 42.2 259.6 Up 08:26:29 - 08:56:29 4486
Brewster 08:41:29 -57.5 Dark Up 42.4 259.7 Up 08:26:29 - 08:56:29 4457
Manson/Chelan 08:41:30 -57.7 Dark Up 42.7 259.6 Up 08:26:30 - 08:56:30 4430
Victoria 08:41:41 -57.4 Dark Up 44.7 256.2 Up 08:26:41 - 08:56:41 4410
Wenatchee 08:41:28 -58.2 Dark Up 42.9 259.9 Up 08:26:28 - 08:56:28 4383
Ellensburg 08:41:27 -58.7 Dark Up 43.1 260.1 Up 08:26:27 - 08:56:27 4340
Yakima 08:41:26 -59.1 Dark Up 43.2 260.4 Up 08:26:26 - 08:56:26 4303
PNWRO 08:41:20 -59.4 Dark Up 42.2 262.3 Up 08:26:20 - 08:56:20 4292
Toppenish/White Swan 08:41:25 -59.2 Dark Up 43.1 260.8 Up 08:26:25 - 08:56:25 4287
The Dalles 08:41:24 -60.1 Dark Up 43.8 260.8 Up 08:26:24 - 08:56:24 4197
Dunrhomin 08:40:27 -59.5 Dark Up 32.4 276.1 Up 08:25:27 - 08:55:27 4168
Maupin 08:41:23 -60.5 Dark Up 43.8 261.3 Up 08:26:23 - 08:56:23 4161
Nikitin 08:40:26 -59.6 Dark Up 32.4 276.2 Up 08:25:26 - 08:55:26 4151
CU-SBO 08:40:27 -59.7 Dark Up 32.4 276.1 Up 08:25:27 - 08:55:27 4143
Sisters 08:41:21 -61.4 Dark Up 44.3 261.7 Up 08:26:21 - 08:56:21 4067
Bend 08:41:18 -61.6 Dark Up 44.1 262.2 Up 08:26:18 - 08:56:18 4051
Oregon Observatory 08:41:20 -61.8 Dark Up 44.2 262.2 Up 08:26:20 - 08:56:20 4032
Chiloquin 08:41:16 -63.2 Dark Up 44.7 263.2 Up 08:26:16 - 08:56:16 3897
Klamath Falls 08:41:15 -63.5 Dark Up 44.7 263.6 Up 08:26:15 - 08:56:15 3867
Cedarville 08:41:08 -63.9 Dark Up 43.6 265.4 Up 08:26:08 - 08:56:08 3843
Fall River/Burney 08:41:11 -64.6 Dark Up 44.6 265.0 Up 08:26:11 - 08:56:11 3764
Gimple 08:41:06 -65.4 Dark Up 44.2 266.3 Up 08:26:06 - 08:56:06 3691
Greenville 08:41:05 -65.4 Dark Up 44.3 266.2 Up 08:26:05 - 08:56:05 3689
Portola 08:41:04 -65.7 Dark Up 44.0 266.8 Up 08:26:04 - 08:56:04 3670
Quincy 08:41:05 -65.6 Dark Up 44.3 266.4 Up 08:26:05 - 08:56:05 3669
Reno 08:41:00 -65.8 Dark Up 43.5 267.5 Up 08:26:00 - 08:56:00 3663
Carson City 08:41:00 -66.1 Dark Up 43.5 267.9 Up 08:26:00 - 08:56:00 3629
Yerington 08:40:57 -66.2 Dark Up 43.0 268.5 Up 08:25:57 - 08:55:57 3628
Gardnerville 08:40:58 -66.3 Dark Up 43.5 268.1 Up 08:25:58 - 08:55:58 3606
Hawthorne 08:40:54 -66.5 Dark Up 42.6 269.2 Up 08:25:54 - 08:55:54 3598
Lee Vining 08:40:54 -67.1 Dark Up 43.0 269.5 Up 08:25:54 - 08:55:54 3529
Beatty 08:40:43 -67.4 Dark Up 41.2 271.8 Up 08:25:43 - 08:55:43 3495
Bishop 08:40:50 -67.5 Dark Up 42.4 270.4 Up 08:25:50 - 08:55:50 3492
Patrick 08:40:31 -67.6 Dark Up 38.8 274.6 Up 08:25:31 - 08:55:31 3439
Laughlin/Bullhead City 08:40:33 -68.1 Dark Up 39.3 274.4 Up 08:25:33 - 08:55:33 3393
George/Scottsdale 08:40:21 -67.9 Dark Up 37.0 276.9 Up 08:25:21 - 08:55:21 3339
Lake Havasu City 08:40:30 -68.5 Dark Up 39.1 275.1 Up 08:25:30 - 08:55:30 3335
Idyllwild 08:40:34 -70.2 Dark Up 41.0 274.6 Up 08:25:34 - 08:55:34 3186
Wildwood 08:40:41 -70.6 Dark Up 42.5 273.3 Up 08:25:41 - 08:55:41 3163
Calipatria 08:40:29 -70.2 Dark Up 39.9 275.6 Up 08:25:29 - 08:55:29 3162
Yuma 08:40:26 -70.2 Dark Up 39.2 276.4 Up 08:25:26 - 08:55:26 3148

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 508869, (2029/02/04 08:51UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.41 114
Alhena         06:37:42.8 +16:23:56  1.9 10.37 106
3 Gem          06:09:44.0 +23:06:48  5.5  1.35 113
5 Gem          06:11:32.3 +24:25:11  6.7  0.40 113
PPM 095531     06:09:56.9 +24:37:07  9.6  0.16 113
PPM 095526     06:09:49.7 +24:21:32 10.2  0.10 113
508869         06:09:47.7 +24:27:32 15.7       113
Positions are for J2000

Event circumstances last updated at 2023/02/15 03:53:51 UT

Marc W. Buie, Southwest Research Institute

RECON