RECON: TNO occultation with 500877

Event between (500877) 13JE64 and star GA0700:09516795 with event index number of 2332703

Geocentric closest approach at 2027/07/12 07:14:04 UTC

J2000 position of star is 17:19:20.8 -19:20:37
Equinox of date position of star is 17:20:47.4 -19:22:02
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 43 degrees from the moon. Moon is 66% illuminated.
Apparent brightness V=24.3

[RECON map]
Object is 39.1 AU from the Sun and 38.2 AU from the Earth.
Apparent velocity is 20.6 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 616 seconds.
The 1-sigma cross-track error in the shadow position is 3430 km.
The sky-plane scale is 27727.9 km/arcsec.

The object has an absolute magnitude Hv=8.3
Diameter=138.0 km assuming a 5% albedo -- 6.4 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 500877, (2027/07/12 07:14UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.0 -26:29:26  0.9 13.50  31
35Eta Oph      17:11:57.5 -15:45:25  2.6  4.20  42
PPM 233026     17:26:13.9 -18:28:08  6.4  1.54  44
PPM 232949     17:22:11.5 -19:21:37  6.9  0.29  43
PPM 232906     17:20:27.6 -19:16:43  9.4  0.15  43
500877         17:20:58.2 -19:22:13 17.0        43
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 1.5 sigma about the mid-time.
The median site spacing is 20.0 km RECON observability=0.8 and success probability=8.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 07:13:01 -16.4 AT Up 18.2 197.9 Really Low 06:58:01 - 07:28:01 602
Kelowna 07:12:57 -17.3 AT Up 18.8 198.8 Really Low 06:57:57 - 07:27:57 562
Peachland 07:12:58 -17.4 AT Up 19.0 198.6 Really Low 06:57:58 - 07:27:58 560
Summerland 07:12:58 -17.5 AT Up 19.1 198.7 Really Low 06:57:58 - 07:27:58 553
Penticton 07:12:57 -17.6 AT Up 19.1 198.8 Really Low 06:57:57 - 07:27:57 550
Victoria 07:13:09 -18.0 AT Up 20.8 195.1 Low 06:58:09 - 07:28:09 535
Oliver 07:12:57 -17.9 AT Up 19.5 198.8 Really Low 06:57:57 - 07:27:57 535
Anarchist Mountain Observatory 07:12:56 -18.1 Dark Up 19.6 199.0 Really Low 06:57:56 - 07:27:56 527
Sleaford 07:12:20 -15.9 AT Down 13.2 211.2 Really Low 06:57:20 - 07:27:20 513
Okanogan 07:12:56 -18.7 Dark Up 20.2 198.9 Low 06:57:56 - 07:27:56 500
Brewster 07:12:56 -19.0 Dark Up 20.5 198.7 Low 06:57:56 - 07:27:56 490
Manson/Chelan 07:12:57 -19.1 Dark Up 20.8 198.4 Low 06:57:57 - 07:27:57 483
Wenatchee 07:12:57 -19.5 Dark Up 21.3 198.3 Low 06:57:57 - 07:27:57 463
Ellensburg 07:12:58 -19.9 Dark Up 21.7 198.1 Low 06:57:58 - 07:27:58 447
Yakima 07:12:57 -20.3 Dark Up 22.1 198.1 Low 06:57:57 - 07:27:57 428
Toppenish/White Swan 07:12:56 -20.5 Dark Up 22.3 198.3 Low 06:57:56 - 07:27:56 416
PNWRO 07:12:51 -21.1 Dark Up 22.3 199.8 Low 06:57:51 - 07:27:51 386
The Dalles 07:12:58 -21.2 Dark Up 23.2 197.7 Low 06:57:58 - 07:27:58 385
Maupin 07:12:57 -21.6 Dark Up 23.6 197.8 Low 06:57:57 - 07:27:57 364
Sisters 07:12:58 -22.4 Dark Up 24.5 197.4 Low 06:57:58 - 07:27:58 325
Bend 07:12:57 -22.6 Dark Up 24.7 197.7 Low 06:57:57 - 07:27:57 311
Oregon Observatory 07:12:57 -22.8 Dark Up 24.9 197.6 Low 06:57:57 - 07:27:57 303
Chiloquin 07:12:58 -24.0 Dark Up 26.2 197.4 Low 06:57:58 - 07:27:58 238
Klamath Falls 07:12:57 -24.3 Dark Up 26.6 197.5 Low 06:57:57 - 07:27:57 219
Cedarville 07:12:50 -25.3 Dark Up 26.8 199.2 Low 06:57:50 - 07:27:50 167
Fall River/Burney 07:12:54 -25.5 Dark Up 27.6 198.1 Low 06:57:54 - 07:27:54 150
Greenville 07:12:52 -26.5 Dark Up 28.3 198.7 Low 06:57:52 - 07:27:52 95
Gimple 07:12:51 -26.5 Dark Up 28.3 198.8 Low 06:57:51 - 07:27:51 94
Quincy 07:12:51 -26.7 Dark Up 28.5 198.7 Low 06:57:51 - 07:27:51 83
Portola 07:12:49 -26.9 Dark Up 28.5 199.2 Low 06:57:49 - 07:27:49 72
Reno 07:12:47 -27.3 Dark Up 28.6 199.9 Low 06:57:47 - 07:27:47 51
Carson City 07:12:46 -27.6 Dark Up 29.0 200.0 Low 06:57:46 - 07:27:46 29
Gardnerville 07:12:46 -27.9 Dark Up 29.2 200.1 Low 06:57:46 - 07:27:46 14
Yerington 07:12:44 -27.9 Dark Up 29.0 200.7 Low 06:57:44 - 07:27:44 11
Hawthorne 07:12:41 -28.5 Dark Up 29.3 201.3 Low 06:57:41 - 07:27:41 -22
Lee Vining 07:12:42 -28.9 Dark Up 29.9 201.0 Low 06:57:42 - 07:27:42 -51
Dunrhomin 07:11:54 -27.7 Dark Down 23.0 213.9 Low 06:56:54 - 07:26:54 -92
Bishop 07:12:39 -29.6 Dark Up 30.3 201.8 Up 06:57:39 - 07:27:39 -96
Nikitin 07:11:54 -27.9 Dark Down 23.1 213.9 Low 06:56:54 - 07:26:54 -103
CU-SBO 07:11:54 -28.0 Dark Down 23.2 213.8 Low 06:56:54 - 07:26:54 -106
Beatty 07:12:32 -30.4 Dark Up 30.2 203.6 Up 06:57:32 - 07:27:32 -143
Patrick 07:12:19 -32.2 Dark Up 30.6 206.9 Up 06:57:19 - 07:27:19 -274
Laughlin/Bullhead City 07:12:21 -32.4 Dark Up 31.1 206.2 Up 06:57:21 - 07:27:21 -282
Wildwood 07:12:36 -32.8 Dark Up 33.4 202.4 Up 06:57:36 - 07:27:36 -306
Lake Havasu City 07:12:19 -33.1 Dark Up 31.6 206.6 Up 06:57:19 - 07:27:19 -330
Idyllwild 07:12:28 -33.5 Dark Up 33.1 204.4 Up 06:57:28 - 07:27:28 -351
Calipatria 07:12:23 -34.2 Dark Up 33.2 205.8 Up 06:57:23 - 07:27:23 -408
George/Scottsdale 07:12:09 -34.1 Dark Up 31.3 209.3 Up 06:57:09 - 07:27:09 -415
Yuma 07:12:19 -34.8 Dark Up 33.3 206.8 Up 06:57:19 - 07:27:19 -450

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 500877, (2027/07/12 07:14UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.50  31
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.20  42
PPM 233026     17:24:37.1 -18:26:45  6.4  1.54  44
PPM 232949     17:20:34.1 -19:20:04  6.9  0.29  43
PPM 232906     17:18:50.3 -19:15:06  9.4  0.15  43
500877         17:19:20.8 -19:20:37 17.0        43
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:27:05 UT

Marc W. Buie, Southwest Research Institute

RECON