RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1380:00666351 with event index number of 2733324

Geocentric closest approach at 2027/10/12 04:26:32 UTC

J2000 position of star is 01:20:26.7 +48:43:05
Equinox of date position of star is 01:21:52.1 +48:50:30
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 64 degrees from the moon. Moon is 89% illuminated.
Apparent brightness V=22.4

[RECON map]
Object is 21.9 AU from the Sun and 21.1 AU from the Earth.
Apparent velocity is 22.0 km/sec on the sky relative to the star, or, 5.2 arcsec/hr.
The 1-sigma error in the time of the event is 133 seconds.
The 1-sigma cross-track error in the shadow position is 1979 km.
The sky-plane scale is 15324.1 km/arcsec.

The object has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 4.7 sec chord
Diameter=41.0 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 601690, (2027/10/12 04:29UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:22.8 +45:22:51  1.3 46.00  57
57Gam1And      02:05:37.0 +42:27:42  2.3  9.92  66
PPM 043804     01:18:03.5 +48:13:41  6.4  0.92  63
PPM 043909     01:23:12.5 +48:13:28  8.0  0.66  64
PPM 043868     01:21:01.2 +49:06:13  9.1  0.30  64
PPM 043886     01:21:53.0 +48:45:23 10.4  0.11  64
601690         01:22:06.9 +48:51:47 16.2        65
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 25.2 km RECON observability=1.0 and success probability=26.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 04:28:58 -29.5 Dark Up 54.0 68.1 Up 04:17:22 - 04:40:34 188
Kamloops 04:28:45 -30.2 Dark Up 56.5 72.3 Up 04:17:09 - 04:40:21 186
Peachland 04:28:48 -31.0 Dark Up 56.6 71.3 Up 04:17:12 - 04:40:24 89
Kelowna 04:28:47 -31.1 Dark Up 56.8 71.6 Up 04:17:11 - 04:40:23 82
Summerland 04:28:48 -31.2 Dark Up 56.6 71.1 Up 04:17:12 - 04:40:24 73
Penticton 04:28:48 -31.3 Dark Up 56.7 71.1 Up 04:17:12 - 04:40:24 62
Oliver 04:28:50 -31.4 Dark Up 56.6 70.6 Up 04:17:14 - 04:40:26 37
Anarchist Mountain Observatory 04:28:50 -31.6 Dark Up 56.6 70.4 Up 04:17:14 - 04:40:26 14
Okanogan 04:28:53 -31.8 Dark Up 56.3 69.4 Up 04:17:17 - 04:40:29 -23
Manson/Chelan 04:28:55 -31.7 Dark Up 55.8 68.5 Up 04:17:19 - 04:40:31 -29
Brewster 04:28:54 -31.8 Dark Up 56.1 68.9 Up 04:17:18 - 04:40:30 -32
Wenatchee 04:28:57 -31.8 Dark Up 55.5 67.8 Up 04:17:21 - 04:40:33 -55
Ellensburg 04:28:59 -31.9 Dark Up 55.2 67.2 Up 04:17:23 - 04:40:35 -74
Yakima 04:29:01 -32.1 Dark Up 55.0 66.6 Up 04:17:25 - 04:40:37 -103
Toppenish/White Swan 04:29:01 -32.3 Dark Up 55.1 66.4 Up 04:17:25 - 04:40:37 -128
The Dalles 04:29:05 -32.1 Dark Up 54.2 65.2 Up 04:17:29 - 04:40:41 -143
Maupin 04:29:06 -32.4 Dark Up 54.1 64.7 Up 04:17:30 - 04:40:42 -180
Sisters 04:29:10 -32.4 Dark Up 53.4 63.5 Up 04:17:34 - 04:40:46 -218
PNWRO 04:29:00 -33.3 Dark Up 55.9 66.4 Up 04:17:24 - 04:40:36 -236
Bend 04:29:11 -32.7 Dark Up 53.5 63.2 Up 04:17:35 - 04:40:47 -251
Oregon Observatory 04:29:12 -32.7 Dark Up 53.3 63.0 Up 04:17:36 - 04:40:48 -256
Chiloquin 04:29:17 -32.9 Dark Up 52.5 61.4 Up 04:17:41 - 04:40:53 -331
Sleaford 04:28:14 -36.6 Dark Up 65.6 82.5 Up 04:16:38 - 04:39:50 -358
Klamath Falls 04:29:18 -33.1 Dark Up 52.4 61.0 Up 04:17:42 - 04:40:54 -362
Fall River/Burney 04:29:21 -33.9 Dark Up 52.0 59.7 Up 04:17:45 - 04:40:57 -473
Cedarville 04:29:17 -34.5 Dark Up 53.1 60.5 Up 04:17:41 - 04:40:53 -508
Greenville 04:29:23 -34.5 Dark Up 51.9 58.8 Up 04:17:47 - 04:40:59 -569
Gimple 04:29:23 -34.6 Dark Up 51.9 58.8 Up 04:17:47 - 04:40:59 -574
Quincy 04:29:24 -34.6 Dark Up 51.8 58.6 Up 04:17:48 - 04:41:00 -585
Portola 04:29:24 -35.0 Dark Up 52.0 58.5 Up 04:17:48 - 04:41:00 -623
Reno 04:29:23 -35.5 Dark Up 52.3 58.3 Up 04:17:47 - 04:40:59 -682
Carson City 04:29:24 -35.7 Dark Up 52.1 57.9 Up 04:17:48 - 04:41:00 -712
Gardnerville 04:29:25 -35.8 Dark Up 52.0 57.7 Up 04:17:49 - 04:41:01 -734
Yerington 04:29:24 -36.2 Dark Up 52.4 57.8 Up 04:17:48 - 04:41:00 -765
Hawthorne 04:29:24 -36.8 Dark Up 52.5 57.3 Up 04:17:48 - 04:41:00 -833
Lee Vining 04:29:27 -36.7 Dark Up 51.9 56.7 Up 04:17:51 - 04:41:03 -848
Bishop 04:29:27 -37.4 Dark Up 52.1 56.1 Up 04:17:51 - 04:41:03 -940
Beatty 04:29:25 -38.8 Dark Up 52.9 55.6 Up 04:17:49 - 04:41:01 -1076
Wildwood 04:29:37 -38.5 Dark Up 50.1 52.8 Up 04:18:01 - 04:41:13 -1189
Idyllwild 04:29:34 -40.1 Dark Up 51.1 52.3 Up 04:17:58 - 04:41:10 -1337
Laughlin/Bullhead City 04:29:25 -41.1 Dark Up 53.3 53.6 Up 04:17:49 - 04:41:01 -1350
Patrick 04:29:22 -41.5 Dark Up 53.9 53.8 Up 04:17:46 - 04:40:58 -1372
Lake Havasu City 04:29:26 -41.6 Dark Up 53.1 52.9 Up 04:17:50 - 04:41:02 -1421
Dunrhomin 04:28:47 -44.8 Dark Up 62.2 59.6 Up 04:17:11 - 04:40:23 -1432
Nikitin 04:28:47 -44.9 Dark Up 62.1 59.3 Up 04:17:11 - 04:40:23 -1447
CU-SBO 04:28:48 -44.9 Dark Up 62.0 59.2 Up 04:17:12 - 04:40:24 -1449
Calipatria 04:29:33 -41.2 Dark Up 51.5 51.6 Up 04:17:57 - 04:41:09 -1461
Yuma 04:29:31 -42.1 Dark Up 51.8 51.1 Up 04:17:55 - 04:41:07 -1552
George/Scottsdale 04:29:22 -43.8 Dark Up 54.2 51.7 Up 04:17:46 - 04:40:58 -1635

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, (2027/10/12 04:29UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 46.00  57
57Gam1And      02:03:54.1 +42:19:46  2.3  9.92  66
PPM 043804     01:16:24.4 +48:04:55  6.4  0.92  63
PPM 043909     01:21:32.5 +48:04:47  8.0  0.66  64
PPM 043868     01:19:21.1 +48:57:30  9.1  0.30  64
PPM 043886     01:20:12.9 +48:36:40 10.4  0.11  64
601690         01:20:26.7 +48:43:05 16.2        64
Positions are for J2000

Event circumstances last updated at 2023/09/03 04:35:01 UT

Marc W. Buie, Southwest Research Institute

RECON