RECON: TNO occultation with 85627

Event between (85627) 98HP151 and star GA0640:20508296 with event index number of 2408060

Geocentric closest approach at 2026/07/27 06:42:18 UTC

J2000 position of star is 17:48:49.9 -24:14:32
Equinox of date position of star is 17:50:19.9 -24:14:54
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 11 degrees from the moon. Moon is 95% illuminated.
Apparent brightness V=23.4

[RECON map]
Object is 40.9 AU from the Sun and 40.1 AU from the Earth.
Apparent velocity is 18.7 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 417 seconds.
The 1-sigma cross-track error in the shadow position is 2151 km.
The sky-plane scale is 29049.4 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=199.5 km assuming a 5% albedo -- 11.5 sec chord
Diameter=81.5 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 85627, (2026/07/27 06:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.5 -26:29:19  0.9 18.06  29
35Eta Oph      17:11:54.2 -15:45:21  2.6 12.41  23
PPM 267497     17:56:32.3 -24:53:23  6.4  1.52  10
PPM 267369     17:51:35.0 -24:12:48  7.2  0.26  11
PPM 267347     17:50:47.9 -24:14:45  9.7  0.08  11
85627          17:50:27.6 -24:14:56 14.8        11
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 2.2 sigma about the mid-time.
The median site spacing is 18.7 km RECON observability=0.5 and success probability=11.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:41:22 -17.6 AT Up 13.5 196.6 Really Low 06:26:22 - 06:56:22 243
Kelowna 06:41:18 -18.5 Dark Up 14.1 197.5 Really Low 06:26:18 - 06:56:18 211
Peachland 06:41:19 -18.6 Dark Up 14.2 197.2 Really Low 06:26:19 - 06:56:19 210
Summerland 06:41:18 -18.7 Dark Up 14.4 197.3 Really Low 06:26:18 - 06:56:18 204
Penticton 06:41:18 -18.8 Dark Up 14.4 197.4 Really Low 06:26:18 - 06:56:18 201
Victoria 06:41:31 -18.8 Dark Up 16.1 193.9 Really Low 06:26:31 - 06:56:31 193
Oliver 06:41:17 -19.2 Dark Up 14.7 197.4 Really Low 06:26:17 - 06:56:17 190
Anarchist Mountain Observatory 06:41:16 -19.4 Dark Up 14.9 197.6 Really Low 06:26:16 - 06:56:16 184
Okanogan 06:41:16 -19.9 Dark Up 15.5 197.5 Really Low 06:26:16 - 06:56:16 163
Brewster 06:41:16 -20.1 Dark Up 15.8 197.3 Really Low 06:26:16 - 06:56:16 155
Manson/Chelan 06:41:17 -20.2 Dark Up 16.1 197.0 Really Low 06:26:17 - 06:56:17 151
Sleaford 06:40:36 -18.4 Dark Up 8.7 209.3 Really Low 06:25:36 - 06:55:36 139
Wenatchee 06:41:17 -20.6 Dark Up 16.6 196.9 Really Low 06:26:17 - 06:56:17 135
Ellensburg 06:41:18 -20.9 Dark Up 17.0 196.7 Really Low 06:26:18 - 06:56:18 122
Yakima 06:41:17 -21.3 Dark Up 17.4 196.7 Really Low 06:26:17 - 06:56:17 107
Toppenish/White Swan 06:41:16 -21.6 Dark Up 17.6 196.9 Really Low 06:26:16 - 06:56:16 97
The Dalles 06:41:18 -22.1 Dark Up 18.5 196.2 Really Low 06:26:18 - 06:56:18 73
PNWRO 06:41:10 -22.3 Dark Up 17.6 198.3 Really Low 06:26:10 - 06:56:10 72
Maupin 06:41:18 -22.5 Dark Up 18.9 196.4 Really Low 06:26:18 - 06:56:18 56
Sisters 06:41:18 -23.2 Dark Up 19.8 196.0 Really Low 06:26:18 - 06:56:18 24
Bend 06:41:17 -23.4 Dark Up 20.0 196.3 Really Low 06:26:17 - 06:56:17 13
Oregon Observatory 06:41:17 -23.6 Dark Up 20.2 196.1 Low 06:26:17 - 06:56:17 7
Chiloquin 06:41:18 -24.6 Dark Up 21.5 195.9 Low 06:26:18 - 06:56:18 -47
Klamath Falls 06:41:17 -25.0 Dark Up 21.8 196.0 Low 06:26:17 - 06:56:17 -63
Cedarville 06:41:09 -26.1 Dark Up 22.2 197.6 Low 06:26:09 - 06:56:09 -107
Fall River/Burney 06:41:14 -26.2 Dark Up 22.9 196.5 Low 06:26:14 - 06:56:14 -121
Greenville 06:41:11 -27.1 Dark Up 23.7 197.0 Low 06:26:11 - 06:56:11 -167
Gimple 06:41:11 -27.2 Dark Up 23.7 197.1 Low 06:26:11 - 06:56:11 -168
Quincy 06:41:11 -27.3 Dark Up 23.9 197.1 Low 06:26:11 - 06:56:11 -177
Portola 06:41:09 -27.6 Dark Up 23.9 197.5 Low 06:26:09 - 06:56:09 -187
Reno 06:41:05 -28.0 Dark Up 24.0 198.2 Low 06:26:05 - 06:56:05 -206
Carson City 06:41:05 -28.4 Dark Up 24.3 198.2 Low 06:26:05 - 06:56:05 -224
Gardnerville 06:41:04 -28.6 Dark Up 24.5 198.3 Low 06:26:04 - 06:56:04 -237
Yerington 06:41:02 -28.7 Dark Up 24.4 198.9 Low 06:26:02 - 06:56:02 -239
Hawthorne 06:40:59 -29.3 Dark Up 24.7 199.4 Low 06:25:59 - 06:55:59 -268
Lee Vining 06:41:00 -29.7 Dark Up 25.3 199.1 Low 06:26:00 - 06:56:00 -293
Bishop 06:40:56 -30.5 Dark Up 25.7 199.8 Low 06:25:56 - 06:55:56 -332
Dunrhomin 06:40:07 -30.2 Dark Up 18.7 211.3 Really Low 06:25:07 - 06:55:07 -356
Nikitin 06:40:06 -30.4 Dark Up 18.9 211.3 Really Low 06:25:06 - 06:55:06 -365
CU-SBO 06:40:06 -30.5 Dark Up 19.0 211.2 Really Low 06:25:06 - 06:55:06 -367
Beatty 06:40:49 -31.3 Dark Up 25.7 201.5 Low 06:25:49 - 06:55:49 -374
Patrick 06:40:34 -33.5 Dark Up 26.2 204.4 Low 06:25:34 - 06:55:34 -491
Laughlin/Bullhead City 06:40:37 -33.5 Dark Up 26.6 203.8 Low 06:25:37 - 06:55:37 -497
Wildwood 06:40:54 -33.4 Dark Up 28.8 200.2 Low 06:25:54 - 06:55:54 -515
Lake Havasu City 06:40:35 -34.2 Dark Up 27.1 204.2 Low 06:25:35 - 06:55:35 -540
Idyllwild 06:40:44 -34.3 Dark Up 28.6 202.1 Low 06:25:44 - 06:55:44 -555
Calipatria 06:40:38 -35.2 Dark Up 28.8 203.3 Low 06:25:38 - 06:55:38 -607
George/Scottsdale 06:40:23 -35.6 Dark Up 27.0 206.7 Low 06:25:23 - 06:55:23 -619
Yuma 06:40:34 -35.9 Dark Up 28.9 204.3 Low 06:25:34 - 06:55:34 -645

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 85627, (2026/07/27 06:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.06  29
35Eta Oph      17:10:22.7 -15:43:29  2.6 12.41  23
PPM 267497     17:54:54.1 -24:53:13  6.4  1.52  10
PPM 267369     17:49:57.4 -24:12:26  7.2  0.26  11
PPM 267347     17:49:10.2 -24:14:21  9.7  0.08  11
85627          17:48:49.9 -24:14:32 14.8        11
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:32:11 UT

Marc W. Buie, Southwest Research Institute

RECON