RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1380:00897296 with event index number of 2733423

Geocentric closest approach at 2028/08/03 09:07:24 UTC

J2000 position of star is 01:50:09.9 +49:38:56
Equinox of date position of star is 01:51:40.0 +49:45:56
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 111 degrees from the moon. Moon is 96% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 22.3 AU from the Sun and 22.3 AU from the Earth.
Apparent velocity is 19.1 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 114 seconds.
The 1-sigma cross-track error in the shadow position is 4018 km.
The sky-plane scale is 16166.7 km/arcsec.

The object has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 5.4 sec chord
Diameter=41.0 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 601690, (2028/08/03 09:06UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:33.9 +16:33:53  0.8 47.01 140
57Gam1And      02:05:40.0 +42:27:56  2.3  7.70 112
Phi Per        01:45:28.2 +50:49:54  4.1  1.47 110
PPM 044500     01:53:22.4 +50:00:36  7.7  0.31 111
PPM 044474     01:51:11.7 +49:34:02  8.7  0.26 111
601690         01:51:58.8 +49:47:23 16.9       111
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 11.1 km RECON observability=1.0 and success probability=10.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Wildwood 09:07:26 -36.2 Dark Up 46.1 51.4 Up 08:57:26 - 09:17:26 4145
Idyllwild 09:07:19 -36.0 Dark Up 47.1 51.1 Up 08:57:19 - 09:17:19 4065
Calipatria 09:07:13 -36.2 Dark Up 47.5 50.6 Up 08:57:13 - 09:17:13 4029
Yuma 09:07:09 -36.2 Dark Up 47.8 50.2 Up 08:57:09 - 09:17:09 3999
Lee Vining 09:07:44 -32.6 Dark Up 48.2 54.7 Up 08:57:44 - 09:17:44 3964
Bishop 09:07:40 -33.0 Dark Up 48.3 54.2 Up 08:57:40 - 09:17:40 3961
Gardnerville 09:07:50 -31.9 Dark Up 48.3 55.5 Up 08:57:50 - 09:17:50 3937
Quincy 09:07:58 -31.2 Dark Up 48.1 56.3 Up 08:57:58 - 09:17:58 3932
Carson City 09:07:52 -31.6 Dark Up 48.4 55.8 Up 08:57:52 - 09:17:52 3925
Greenville 09:07:59 -31.0 Dark Up 48.2 56.5 Up 08:57:59 - 09:17:59 3920
Portola 09:07:56 -31.2 Dark Up 48.4 56.2 Up 08:57:56 - 09:17:56 3919
Gimple 09:07:59 -31.0 Dark Up 48.3 56.5 Up 08:57:59 - 09:17:59 3917
Hawthorne 09:07:45 -32.0 Dark Up 48.8 55.3 Up 08:57:45 - 09:17:45 3908
Yerington 09:07:49 -31.7 Dark Up 48.7 55.7 Up 08:57:49 - 09:17:49 3907
Reno 09:07:53 -31.3 Dark Up 48.6 56.1 Up 08:57:53 - 09:17:53 3905
Beatty 09:07:33 -33.0 Dark Up 49.0 53.9 Up 08:57:33 - 09:17:33 3904
Lake Havasu City 09:07:16 -34.5 Dark Up 49.1 51.8 Up 08:57:16 - 09:17:16 3896
Fall River/Burney 09:08:04 -30.2 Dark Up 48.5 57.3 Up 08:58:04 - 09:18:04 3885
Laughlin/Bullhead City 09:07:19 -34.0 Dark Up 49.4 52.4 Up 08:57:19 - 09:17:19 3877
Klamath Falls 09:08:10 -29.1 Dark Up 48.9 58.3 Up 08:58:10 - 09:18:10 3827
Patrick 09:07:18 -33.5 Dark Up 50.0 52.6 Up 08:57:18 - 09:17:18 3825
Chiloquin 09:08:12 -28.8 Dark Up 49.0 58.6 Up 08:58:12 - 09:18:12 3809
Cedarville 09:08:03 -29.5 Dark Up 49.5 58.0 Up 08:58:03 - 09:18:03 3802
George/Scottsdale 09:07:05 -34.3 Dark Up 50.2 50.9 Up 08:57:05 - 09:17:05 3790
Oregon Observatory 09:08:16 -27.5 Dark Up 50.0 60.1 Up 08:58:16 - 09:18:16 3707
Bend 09:08:17 -27.3 Dark Up 50.1 60.3 Up 08:58:17 - 09:18:17 3690
Sisters 09:08:19 -27.1 Dark Up 50.1 60.5 Up 08:58:19 - 09:18:19 3685
Maupin 09:08:21 -26.1 Dark Up 50.8 61.5 Up 08:58:21 - 09:18:21 3606
The Dalles 09:08:23 -25.8 Dark Up 51.0 62.0 Up 08:58:23 - 09:18:23 3582
Toppenish/White Swan 09:08:24 -24.9 Dark Up 51.8 63.1 Up 08:58:24 - 09:18:24 3498
Yakima 09:08:26 -24.7 Dark Up 51.8 63.3 Up 08:58:26 - 09:18:26 3490
Victoria 09:08:41 -23.3 Dark Up 51.0 64.4 Up 08:58:41 - 09:18:41 3464
Ellensburg 09:08:27 -24.3 Dark Up 52.0 63.7 Up 08:58:27 - 09:18:27 3462
PNWRO 09:08:19 -24.9 Dark Up 52.6 63.1 Up 08:58:19 - 09:18:19 3460
Wenatchee 09:08:28 -23.8 Dark Up 52.3 64.3 Up 08:58:28 - 09:18:28 3425
Manson/Chelan 09:08:30 -23.4 Dark Up 52.6 64.9 Up 08:58:30 - 09:18:30 3385
Brewster 09:08:30 -23.1 Dark Up 52.9 65.3 Up 08:58:30 - 09:18:30 3356
Okanogan 09:08:31 -22.8 Dark Up 53.2 65.7 Up 08:58:31 - 09:18:31 3329
Anarchist Mountain Observatory 09:08:33 -22.1 Dark Up 53.6 66.6 Up 08:58:33 - 09:18:33 3276
Oliver 09:08:34 -22.0 Dark Up 53.5 66.7 Up 08:58:34 - 09:18:34 3272
Penticton 09:08:36 -21.7 Dark Up 53.7 67.2 Up 08:58:36 - 09:18:36 3247
Summerland 09:08:36 -21.6 Dark Up 53.6 67.2 Up 08:58:36 - 09:18:36 3247
Peachland 09:08:37 -21.5 Dark Up 53.6 67.4 Up 08:58:37 - 09:18:37 3240
Kelowna 09:08:36 -21.3 Dark Up 53.9 67.6 Up 08:58:36 - 09:18:36 3220
Kamloops 09:08:42 -20.7 Dark Up 53.6 68.3 Up 08:58:42 - 09:18:42 3197
CU-SBO 09:07:19 -26.2 Dark Up 58.2 57.7 Up 08:57:19 - 09:17:19 3090
Nikitin 09:07:19 -26.1 Dark Up 58.3 57.8 Up 08:57:19 - 09:17:19 3082
Dunrhomin 09:07:19 -26.0 Dark Up 58.4 58.0 Up 08:57:19 - 09:17:19 3071
Sleaford 09:08:18 -16.0 AT Up 62.6 77.4 Up 08:58:18 - 09:18:18 2470

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 601690, (2028/08/03 09:06UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 47.01 140
57Gam1And      02:03:54.1 +42:19:46  2.3  7.70 112
Phi Per        01:43:39.7 +50:41:19  4.1  1.47 110
PPM 044500     01:51:33.1 +49:52:10  7.7  0.31 111
PPM 044474     01:49:23.1 +49:25:34  8.7  0.26 111
601690         01:50:09.9 +49:38:56 16.9       111
Positions are for J2000

Event circumstances last updated at 2023/09/04 01:01:23 UT

Marc W. Buie, Southwest Research Institute

RECON