RECON: TNO occultation with 523800

Event between (523800) 17KZ31 and star GA1220:03171145 with event index number of 2670077

Geocentric closest approach at 2028/12/29 11:26:12 UTC

J2000 position of star is 07:34:28.4 +33:09:47
Equinox of date position of star is 07:35:55.2 +33:06:45
Stellar brightness G=14.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 40 degrees from the moon. Moon is 94% illuminated.
TNO apparent brightness V=23.6

[RECON map]
TNO is 21.4 AU from the Sun and 20.4 AU from the Earth.
The TNO is moving 35.7 km/sec on the sky relative to the star, or, 8.7 arcsec/hr.
The 1-sigma error in the time of the event is 137 seconds.
The 1-sigma cross-track error in the shadow position is 2623 km.
The sky-plane scale is 14829.6 km/arcsec.

The TNO has an absolute magnitude Hv=10.3
Diameter=52.2 km assuming a 5% albedo -- 1.5 sec chord
Diameter=21.3 km assuming a 30% albedo -- 0.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523800, (2028/12/29 11:26UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:05.5 +27:57:14  1.1  5.64  42
PPM 073009     07:41:45.1 +31:56:26  6.4  1.62  41
PPM 072932     07:36:17.0 +33:03:24  8.1  0.04  40
523800         07:36:20.7 +33:05:52 14.7        40
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 19.4 km RECON observability=1.0 and success probability=14.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:25:09 -33.4 Dark Up 49.5 262.3 Up 11:13:15 - 11:37:03 4359
Kamloops 11:25:24 -42.5 Dark Up 58.6 250.0 Up 11:13:30 - 11:37:18 3716
Kelowna 11:25:21 -42.2 Dark Up 58.3 252.2 Up 11:13:27 - 11:37:15 3681
Peachland 11:25:22 -42.4 Dark Up 58.5 252.1 Up 11:13:28 - 11:37:16 3661
Summerland 11:25:21 -42.4 Dark Up 58.5 252.4 Up 11:13:27 - 11:37:15 3652
Penticton 11:25:20 -42.3 Dark Up 58.5 252.6 Up 11:13:26 - 11:37:14 3651
Oliver 11:25:20 -42.4 Dark Up 58.6 253.2 Up 11:13:26 - 11:37:14 3621
Anarchist Mountain Observatory 11:25:19 -42.3 Dark Up 58.5 253.6 Up 11:13:25 - 11:37:13 3614
Tonasket 11:25:19 -42.4 Dark Up 58.6 254.0 Up 11:13:25 - 11:37:13 3586
Okanogan 11:25:18 -42.6 Dark Up 58.8 254.4 Up 11:13:24 - 11:37:12 3552
Brewster 11:25:18 -42.8 Dark Up 59.0 254.6 Up 11:13:24 - 11:37:12 3521
Dunrhomin 11:24:41 -33.1 Dark Up 49.2 276.7 Up 11:12:47 - 11:36:35 3502
Manson/Chelan 11:25:18 -43.1 Dark Up 59.3 254.6 Up 11:13:24 - 11:37:12 3490
CU-SBO 11:24:41 -33.1 Dark Up 49.2 276.9 Up 11:12:47 - 11:36:35 3477
Wenatchee 11:25:17 -43.3 Dark Up 59.6 255.2 Up 11:13:23 - 11:37:11 3443
Victoria 11:25:24 -45.0 Dark Up 61.2 250.0 Up 11:13:30 - 11:37:18 3425
Ellensburg 11:25:17 -43.6 Dark Up 59.8 255.6 Up 11:13:23 - 11:37:11 3399
PNWRO 11:25:13 -42.7 Dark Up 58.9 258.9 Up 11:13:19 - 11:37:07 3378
Yakima 11:25:16 -43.7 Dark Up 59.9 256.3 Up 11:13:22 - 11:37:10 3364
Toppenish/White Swan 11:25:16 -43.6 Dark Up 59.9 256.8 Up 11:13:22 - 11:37:10 3352
Goldendale 11:25:15 -44.0 Dark Up 60.3 257.3 Up 11:13:21 - 11:37:09 3287
The Dalles 11:25:15 -44.3 Dark Up 60.6 257.4 Up 11:13:21 - 11:37:09 3253
Maupin 11:25:14 -44.3 Dark Up 60.6 258.2 Up 11:13:20 - 11:37:08 3221
Sisters 11:25:13 -44.8 Dark Up 61.1 259.3 Up 11:13:19 - 11:37:07 3124
Bend 11:25:13 -44.7 Dark Up 61.0 259.9 Up 11:13:19 - 11:37:07 3114
Oregon Observatory 11:25:12 -44.8 Dark Up 61.1 260.1 Up 11:13:18 - 11:37:06 3093
North Lake 11:25:10 -44.6 Dark Up 60.8 261.7 Up 11:13:16 - 11:37:04 3058
Lakeview 11:25:07 -44.3 Dark Up 60.5 264.1 Up 11:13:13 - 11:37:01 2987
Chiloquin 11:25:11 -45.4 Dark Up 61.6 262.1 Up 11:13:17 - 11:37:05 2959
Cedarville 11:25:06 -44.3 Dark Up 60.5 265.4 Up 11:13:12 - 11:37:00 2935
Klamath Falls 11:25:10 -45.4 Dark Up 61.6 262.8 Up 11:13:16 - 11:37:04 2931
Fall River/Burney 11:25:07 -45.3 Dark Up 61.4 265.3 Up 11:13:13 - 11:37:01 2841
Susanville 11:25:05 -44.8 Dark Up 60.9 267.0 Up 11:13:11 - 11:36:59 2815
Gimple 11:25:05 -45.0 Dark Up 61.1 267.3 Up 11:13:11 - 11:36:59 2781
Greenville 11:25:05 -45.1 Dark Up 61.2 267.3 Up 11:13:11 - 11:36:59 2777
Reno 11:25:02 -44.3 Dark Up 60.3 269.1 Up 11:13:08 - 11:36:56 2772
Portola 11:25:03 -44.7 Dark Up 60.8 268.2 Up 11:13:09 - 11:36:57 2768
Quincy 11:25:05 -45.1 Dark Up 61.2 267.6 Up 11:13:11 - 11:36:59 2759
Tonopah 11:24:55 -42.4 Dark Up 58.3 273.1 Up 11:13:01 - 11:36:49 2754
Yerington 11:25:00 -43.8 Dark Up 59.8 270.5 Up 11:13:06 - 11:36:54 2751
Carson City 11:25:01 -44.3 Dark Up 60.3 269.7 Up 11:13:07 - 11:36:55 2741
Hawthorne 11:24:58 -43.4 Dark Up 59.4 271.6 Up 11:13:04 - 11:36:52 2732
Gardnerville 11:25:01 -44.3 Dark Up 60.3 270.2 Up 11:13:07 - 11:36:55 2721
Indian Springs 11:24:50 -41.2 Dark Up 57.0 276.2 Up 11:12:56 - 11:36:44 2691
Henderson 11:24:47 -40.6 Dark Up 56.3 277.3 Up 11:12:53 - 11:36:41 2676
Patrick 11:24:44 -39.7 Dark Up 55.4 278.7 Up 11:12:50 - 11:36:38 2674
Beatty 11:24:52 -42.0 Dark Up 57.8 275.2 Up 11:12:58 - 11:36:46 2671
Lee Vining 11:24:58 -43.9 Dark Up 59.8 272.2 Up 11:13:04 - 11:36:52 2660
Kingman/Dolan Springs 11:24:44 -39.9 Dark Up 55.5 279.0 Up 11:12:50 - 11:36:38 2645
Bishop 11:24:55 -43.3 Dark Up 59.2 273.6 Up 11:13:01 - 11:36:49 2638
George/Scottsdale 11:24:38 -38.0 Dark Up 53.5 281.8 Up 11:12:44 - 11:36:32 2622
Laughlin/Bullhead City 11:24:45 -40.3 Dark Up 55.9 278.8 Up 11:12:51 - 11:36:39 2618
Mohave Valley 11:24:45 -40.3 Dark Up 55.9 279.2 Up 11:12:51 - 11:36:39 2594
Lake Havasu City 11:24:43 -40.0 Dark Up 55.6 279.9 Up 11:12:49 - 11:36:37 2570
Parker 11:24:43 -40.0 Dark Up 55.5 280.4 Up 11:12:49 - 11:36:37 2539
Yuma 11:24:41 -40.2 Dark Up 55.5 282.3 Up 11:12:47 - 11:36:35 2392
Calipatria 11:24:43 -41.0 Dark Up 56.3 281.5 Up 11:12:49 - 11:36:37 2387
Idyllwild 11:24:46 -42.0 Dark Up 57.4 280.2 Up 11:12:52 - 11:36:40 2386
Wildwood 11:24:50 -43.5 Dark Up 59.0 279.0 Up 11:12:56 - 11:36:44 2329

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 523800, (2028/12/29 11:26UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  5.64  42
PPM 073009     07:39:54.0 +32:00:34  6.4  1.62  41
PPM 072932     07:34:24.7 +33:07:19  8.1  0.04  40
523800         07:34:28.4 +33:09:47 14.7        40
Positions are for J2000

Event circumstances last updated at 2022/06/02 23:05:39 UT

Marc W. Buie, Southwest Research Institute

RECON