RECON: TNO occultation with 470083

Event between (470083) 06SG369 and star GA1080:00975585 with event index number of 2218832

Geocentric closest approach at 2027/12/31 04:05:30 UTC

J2000 position of star is 05:22:19.6 +18:19:26
Equinox of date position of star is 05:23:44.5 +18:20:44
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 125 degrees from the moon. Moon is 10% illuminated.
Apparent brightness V=22.9

[RECON map]
Object is 33.3 AU from the Sun and 32.4 AU from the Earth.
Apparent velocity is 23.3 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 140 seconds.
The 1-sigma cross-track error in the shadow position is 1549 km.
The sky-plane scale is 23485.3 km/arcsec.

The object has an absolute magnitude Hv=7.7
Diameter=178.7 km assuming a 5% albedo -- 7.5 sec chord
Diameter=72.9 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 470083, (2027/12/31 04:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:31.8 +16:33:49  0.8 11.21 114
Alnath         05:28:03.8 +28:37:43  1.6 10.32 126
111 Tau        05:26:03.5 +17:24:25  5.5  1.07 126
PPM 120901     05:25:09.2 +18:37:30  8.4  0.39 125
PPM 120880     05:23:55.8 +18:14:14  9.7  0.11 125
470083         05:23:57.9 +18:20:56 15.1       126
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 32.0 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 04:07:27 -37.0 Dark Down 44.9 121.1 Up 03:55:17 - 04:19:36 10403
Sleaford 04:06:48 -45.2 Dark Down 50.8 139.8 Up 03:54:38 - 04:18:57 10382
Kelowna 04:07:26 -37.7 Dark Down 45.8 121.4 Up 03:55:17 - 04:19:36 10319
Peachland 04:07:28 -37.6 Dark Down 45.7 120.9 Up 03:55:18 - 04:19:37 10313
Summerland 04:07:28 -37.6 Dark Down 45.8 120.9 Up 03:55:18 - 04:19:37 10298
Penticton 04:07:27 -37.7 Dark Down 45.9 121.0 Up 03:55:17 - 04:19:36 10291
Oliver 04:07:28 -37.8 Dark Down 46.1 120.7 Up 03:55:19 - 04:19:38 10259
Victoria 04:07:39 -35.3 Dark Down 44.2 116.0 Up 03:55:29 - 04:19:48 10251
Anarchist Mountain Observatory 04:07:28 -37.9 Dark Down 46.3 120.7 Up 03:55:19 - 04:19:38 10241
Okanogan 04:07:30 -37.9 Dark Down 46.5 119.9 Up 03:55:21 - 04:19:40 10184
Brewster 04:07:31 -37.8 Dark Down 46.5 119.4 Up 03:55:21 - 04:19:40 10162
Manson/Chelan 04:07:31 -37.5 Dark Down 46.4 118.9 Up 03:55:22 - 04:19:41 10148
Wenatchee 04:07:33 -37.5 Dark Down 46.6 118.2 Up 03:55:24 - 04:19:43 10106
Ellensburg 04:07:35 -37.4 Dark Down 46.6 117.6 Up 03:55:25 - 04:19:44 10071
Yakima 04:07:36 -37.4 Dark Down 46.8 117.2 Up 03:55:27 - 04:19:46 10033
Toppenish/White Swan 04:07:37 -37.5 Dark Down 47.0 117.2 Up 03:55:27 - 04:19:46 10011
PNWRO 04:07:33 -38.6 Dark Down 48.1 118.4 Up 03:55:24 - 04:19:43 9956
The Dalles 04:07:40 -37.1 Dark Down 46.9 115.6 Up 03:55:30 - 04:19:49 9949
Maupin 04:07:40 -37.2 Dark Down 47.1 115.3 Up 03:55:31 - 04:19:50 9908
Sisters 04:07:44 -36.9 Dark Down 47.2 114.0 Up 03:55:34 - 04:19:53 9832
Bend 04:07:43 -37.1 Dark Down 47.4 114.0 Up 03:55:34 - 04:19:53 9805
Oregon Observatory 04:07:44 -37.0 Dark Down 47.4 113.7 Up 03:55:35 - 04:19:54 9791
Chiloquin 04:07:48 -36.7 Dark Down 47.7 112.0 Up 03:55:39 - 04:19:58 9670
Klamath Falls 04:07:49 -36.8 Dark Down 47.9 111.7 Up 03:55:39 - 04:19:58 9636
Cedarville 04:07:46 -38.0 Dark Down 49.2 112.6 Up 03:55:36 - 04:19:55 9544
Fall River/Burney 04:07:50 -37.1 Dark Down 48.6 110.9 Up 03:55:40 - 04:19:59 9515
Greenville 04:07:50 -37.5 Dark Down 49.2 110.3 Up 03:55:41 - 04:20:00 9419
Gimple 04:07:50 -37.5 Dark Down 49.3 110.4 Up 03:55:41 - 04:20:00 9417
Quincy 04:07:51 -37.5 Dark Down 49.3 110.1 Up 03:55:41 - 04:20:00 9398
Portola 04:07:50 -37.8 Dark Down 49.7 110.4 Up 03:55:40 - 04:19:59 9379
Reno 04:07:48 -38.3 Dark Down 50.2 110.7 Up 03:55:39 - 04:19:58 9342
Carson City 04:07:49 -38.3 Dark Down 50.4 110.4 Up 03:55:39 - 04:19:58 9306
Gardnerville 04:07:49 -38.4 Dark Down 50.5 110.1 Up 03:55:40 - 04:19:59 9281
Yerington 04:07:48 -38.8 Dark Down 50.9 110.8 Up 03:55:38 - 04:19:57 9277
Dunrhomin 04:07:02 -49.3 Dark Down 59.5 128.8 Up 03:54:52 - 04:19:11 9233
Hawthorne 04:07:47 -39.2 Dark Down 51.4 110.7 Up 03:55:37 - 04:19:56 9222
Nikitin 04:07:02 -49.3 Dark Down 59.6 128.5 Up 03:54:52 - 04:19:11 9214
CU-SBO 04:07:02 -49.3 Dark Down 59.6 128.3 Up 03:54:52 - 04:19:11 9208
Lee Vining 04:07:49 -38.9 Dark Down 51.3 109.6 Up 03:55:40 - 04:19:59 9173
Bishop 04:07:48 -39.4 Dark Down 52.0 109.6 Up 03:55:38 - 04:19:57 9101
Beatty 04:07:44 -40.7 Dark Down 53.4 110.6 Up 03:55:34 - 04:19:53 9029
Patrick 04:07:37 -43.0 Dark Down 56.1 111.5 Up 03:55:27 - 04:19:46 8835
Laughlin/Bullhead City 04:07:39 -42.5 Dark Down 55.6 110.4 Up 03:55:29 - 04:19:48 8819
Wildwood 04:07:54 -39.2 Dark Down 52.8 105.4 Up 03:55:44 - 04:20:03 8768
Lake Havasu City 04:07:39 -42.7 Dark Down 56.1 109.7 Up 03:55:30 - 04:19:49 8745
Idyllwild 04:07:49 -40.7 Dark Down 54.4 106.5 Up 03:55:39 - 04:19:58 8702
George/Scottsdale 04:07:33 -44.7 Dark Down 58.2 111.1 Up 03:55:23 - 04:19:42 8631
Calipatria 04:07:45 -41.6 Dark Down 55.6 106.7 Up 03:55:36 - 04:19:55 8620
Yuma 04:07:42 -42.4 Dark Down 56.4 106.9 Up 03:55:33 - 04:19:52 8561

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 470083, (2027/12/31 04:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 11.21 114
Alnath         05:26:17.6 +28:36:23  1.6 10.32 126
111 Tau        05:24:25.8 +17:23:01  5.5  1.07 126
PPM 120901     05:23:30.6 +18:36:03  8.4  0.39 125
PPM 120880     05:22:17.5 +18:12:44  9.7  0.11 125
470083         05:22:19.6 +18:19:26 15.1       125
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:35:47 UT

Marc W. Buie, Southwest Research Institute

RECON