RECON: TNO occultation with 517717

Event between (517717) 15KZ120 and star GA1440:02740820 with event index number of 2627992

Geocentric closest approach at 2024/12/22 11:34:49 UTC

J2000 position of star is 03:32:37.6 +54:32:32
Equinox of date position of star is 03:34:20.4 +54:37:00
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 107 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 13.6 AU from the Sun and 12.8 AU from the Earth.
The TNO is moving 30.7 km/sec on the sky relative to the star, or, 11.9 arcsec/hr.
The 1-sigma error in the time of the event is 87 seconds.
The 1-sigma cross-track error in the shadow position is 2389 km.
The sky-plane scale is 9292.8 km/arcsec.

The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 1.8 sec chord
Diameter=23.5 km assuming a 30% albedo -- 0.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 517717, (2024/12/22 11:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:50.6 +27:57:50  1.1 52.13  63
Mirphak        03:26:07.2 +49:56:53  1.8  4.85 110
PPM 028555     03:35:34.2 +55:03:27  5.9  0.46 107
PPM 028543     03:34:39.3 +54:20:17  8.4  0.29 107
PPM 028537     03:34:17.3 +54:34:27  9.0  0.06 107
517717         03:34:32.1 +54:37:30 15.6       107
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 17.7 km RECON observability=1.0 and success probability=23.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:31:55 -32.1 Dark Up 33.2 318.1 Up 11:24:12 - 11:39:39 1788
Kamloops 11:32:11 -41.1 Dark Up 38.6 312.1 Up 11:24:27 - 11:39:54 1032
Kelowna 11:32:09 -40.7 Dark Up 37.6 313.0 Up 11:24:25 - 11:39:52 994
Peachland 11:32:09 -41.0 Dark Up 37.7 312.9 Up 11:24:26 - 11:39:53 972
Summerland 11:32:09 -40.9 Dark Up 37.5 313.0 Up 11:24:25 - 11:39:52 962
Penticton 11:32:09 -40.9 Dark Up 37.4 313.1 Up 11:24:25 - 11:39:52 961
Dunrhomin 11:31:43 -31.2 Dark Up 23.8 322.5 Low 11:23:59 - 11:39:26 929
Oliver 11:32:08 -40.9 Dark Up 37.2 313.3 Up 11:24:25 - 11:39:52 929
Anarchist Mountain Observatory 11:32:08 -40.9 Dark Up 37.0 313.5 Up 11:24:24 - 11:39:51 921
CU-SBO 11:31:43 -31.3 Dark Up 23.6 322.5 Low 11:23:59 - 11:39:26 905
Tonasket 11:32:08 -41.0 Dark Up 36.8 313.6 Up 11:24:24 - 11:39:51 891
Okanogan 11:32:08 -41.1 Dark Up 36.6 313.7 Up 11:24:24 - 11:39:51 854
Brewster 11:32:08 -41.3 Dark Up 36.5 313.8 Up 11:24:24 - 11:39:51 822
Manson/Chelan 11:32:08 -41.6 Dark Up 36.6 313.8 Up 11:24:25 - 11:39:52 788
Wenatchee 11:32:08 -41.8 Dark Up 36.3 314.0 Up 11:24:25 - 11:39:52 738
Victoria 11:32:14 -43.6 Dark Up 38.6 312.1 Up 11:24:30 - 11:39:57 718
Ellensburg 11:32:08 -42.0 Dark Up 36.1 314.1 Up 11:24:25 - 11:39:52 692
PNWRO 11:32:05 -41.1 Dark Up 34.6 315.2 Up 11:24:21 - 11:39:48 674
Yakima 11:32:08 -42.1 Dark Up 35.9 314.3 Up 11:24:24 - 11:39:51 655
Toppenish/White Swan 11:32:07 -42.0 Dark Up 35.6 314.5 Up 11:24:24 - 11:39:51 643
Goldendale 11:32:08 -42.4 Dark Up 35.5 314.6 Up 11:24:24 - 11:39:51 575
The Dalles 11:32:08 -42.7 Dark Up 35.5 314.6 Up 11:24:25 - 11:39:52 540
Maupin 11:32:08 -42.7 Dark Up 35.1 314.8 Up 11:24:24 - 11:39:51 507
Sisters 11:32:08 -43.2 Dark Up 34.8 315.1 Up 11:24:25 - 11:39:52 407
Bend 11:32:07 -43.0 Dark Up 34.5 315.3 Up 11:24:24 - 11:39:51 397
Oregon Observatory 11:32:08 -43.1 Dark Up 34.4 315.3 Up 11:24:24 - 11:39:51 376
North Lake 11:32:06 -42.8 Dark Up 33.7 315.8 Up 11:24:23 - 11:39:50 343
Lakeview 11:32:05 -42.6 Dark Up 32.6 316.5 Up 11:24:22 - 11:39:49 275
Chiloquin 11:32:08 -43.6 Dark Up 33.7 315.8 Up 11:24:24 - 11:39:51 241
Cedarville 11:32:04 -42.5 Dark Up 32.1 316.8 Up 11:24:21 - 11:39:48 226
Klamath Falls 11:32:07 -43.6 Dark Up 33.4 316.0 Up 11:24:24 - 11:39:51 215
Fall River/Burney 11:32:06 -43.5 Dark Up 32.3 316.6 Up 11:24:23 - 11:39:50 128
Susanville 11:32:05 -43.0 Dark Up 31.5 317.1 Up 11:24:21 - 11:39:48 107
Tonopah 11:31:58 -40.4 Dark Up 28.0 319.1 Low 11:24:15 - 11:39:42 76
Gimple 11:32:05 -43.1 Dark Up 31.4 317.2 Up 11:24:22 - 11:39:49 74
Reno 11:32:03 -42.4 Dark Up 30.4 317.7 Up 11:24:20 - 11:39:47 72
Greenville 11:32:05 -43.2 Dark Up 31.5 317.2 Up 11:24:22 - 11:39:49 70
Portola 11:32:04 -42.9 Dark Up 31.0 317.4 Up 11:24:21 - 11:39:48 64
Yerington 11:32:02 -41.9 Dark Up 29.7 318.1 Low 11:24:18 - 11:39:45 56
Quincy 11:32:05 -43.2 Dark Up 31.3 317.2 Up 11:24:22 - 11:39:49 53
Patrick 11:31:52 -37.7 Dark Up 24.2 320.9 Low 11:24:09 - 11:39:36 44
Hawthorne 11:32:01 -41.5 Dark Up 29.1 318.5 Low 11:24:17 - 11:39:44 43
Carson City 11:32:03 -42.4 Dark Up 30.2 317.9 Up 11:24:19 - 11:39:46 42
Indian Springs 11:31:55 -39.2 Dark Up 26.1 320.0 Low 11:24:12 - 11:39:39 36
Henderson 11:31:54 -38.6 Dark Up 25.3 320.4 Low 11:24:11 - 11:39:38 32
George/Scottsdale 11:31:49 -35.9 Dark Up 21.9 321.9 Low 11:24:05 - 11:39:32 31
Gardnerville 11:32:03 -42.4 Dark Up 29.9 318.0 Low 11:24:19 - 11:39:46 24
Kingman/Dolan Springs 11:31:53 -37.8 Dark Up 24.2 320.9 Low 11:24:09 - 11:39:36 16
Beatty 11:31:57 -40.0 Dark Up 26.9 319.6 Low 11:24:14 - 11:39:41 5
Laughlin/Bullhead City 11:31:53 -38.2 Dark Up 24.4 320.8 Low 11:24:10 - 11:39:37 -15
Lee Vining 11:32:01 -41.9 Dark Up 28.9 318.5 Low 11:24:18 - 11:39:45 -28
Mohave Valley 11:31:53 -38.2 Dark Up 24.2 320.8 Low 11:24:10 - 11:39:37 -36
Bishop 11:32:00 -41.3 Dark Up 28.1 319.0 Low 11:24:17 - 11:39:44 -42
Lake Havasu City 11:31:53 -38.0 Dark Up 23.8 321.0 Low 11:24:09 - 11:39:36 -53
Parker 11:31:53 -37.9 Dark Up 23.5 321.1 Low 11:24:09 - 11:39:36 -79
Yuma 11:31:53 -38.1 Dark Up 22.5 321.4 Low 11:24:10 - 11:39:37 -210
Calipatria 11:31:55 -38.8 Dark Up 23.3 321.1 Low 11:24:11 - 11:39:38 -228
Idyllwild 11:31:57 -39.9 Dark Up 24.4 320.6 Low 11:24:13 - 11:39:40 -247
Wildwood 11:32:00 -41.4 Dark Up 25.7 320.0 Low 11:24:16 - 11:39:43 -319

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 517717, (2024/12/22 11:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 52.13  63
Mirphak        03:24:19.4 +49:51:40  1.8  4.85 110
PPM 028555     03:33:39.0 +54:58:30  5.9  0.46 107
PPM 028543     03:32:45.2 +54:15:18  8.4  0.29 107
PPM 028537     03:32:22.9 +54:29:28  9.0  0.06 107
517717         03:32:37.6 +54:32:32 15.6       107
Positions are for J2000

Event circumstances last updated at 2022/06/07 22:24:09 UT

Marc W. Buie, Southwest Research Institute

RECON