RECON: TNO occultation with 469707

Event between (469707) 05GB187 and star GA0760:07430834 with event index number of 1684268

Geocentric closest approach at 2027/04/28 08:39:24 UTC

J2000 position of star is 17:27:11.1 -12:44:34
Equinox of date position of star is 17:28:26.5 -12:45:37
Stellar brightness G=12.9, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 42 degrees from the moon. Moon is 55% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 32.8 AU from the Sun and 32.1 AU from the Earth.
The TNO is moving 16.1 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 207 seconds.
The 1-sigma cross-track error in the shadow position is 2134 km.
The sky-plane scale is 23290.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.2
Diameter=214.8 km assuming a 5% albedo -- 13.3 sec chord
Diameter=87.7 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 469707, (2027/04/28 08:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.2 -26:29:25  0.9 19.27  53
35Eta Oph      17:11:56.8 -15:45:24  2.6  5.05  45
53Nu Ser       17:22:21.9 -12:52:20  4.0  1.55  44
PPM 233084     17:28:34.2 -12:32:03  6.6  0.23  42
PPM 233089     17:28:43.4 -12:43:21  9.8  0.04  42
469707         17:28:43.3 -12:45:50 12.9        42
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 4.4 sigma about the mid-time.
The median site spacing is 14.6 km RECON observability=1.0 and success probability=22.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:42:50 -20.2 Dark Down 22.7 157.8 Low 08:27:50 - 08:57:50 439
Kamloops 08:43:40 -24.5 Dark Down 19.6 143.4 Really Low 08:28:40 - 08:58:40 -51
Kelowna 08:43:39 -25.1 Dark Down 20.6 144.1 Low 08:28:39 - 08:58:39 -81
Peachland 08:43:40 -25.3 Dark Down 20.5 143.8 Low 08:28:40 - 08:58:40 -96
Summerland 08:43:40 -25.4 Dark Down 20.7 143.9 Low 08:28:40 - 08:58:40 -104
Penticton 08:43:40 -25.5 Dark Down 20.8 144.0 Low 08:28:40 - 08:58:40 -105
Oliver 08:43:40 -25.8 Dark Down 21.1 143.9 Low 08:28:40 - 08:58:40 -129
Anarchist Mountain Observatory 08:43:40 -26.0 Dark Down 21.3 144.0 Low 08:28:40 - 08:58:40 -135
Tonasket 08:43:40 -26.3 Dark Down 21.5 143.9 Low 08:28:40 - 08:58:40 -159
Okanogan 08:43:41 -26.6 Dark Down 21.7 143.7 Low 08:28:41 - 08:58:41 -187
Brewster 08:43:42 -26.9 Dark Down 21.9 143.4 Low 08:28:42 - 08:58:42 -212
Manson/Chelan 08:43:44 -27.2 Dark Down 21.9 143.0 Low 08:28:44 - 08:58:44 -238
Wenatchee 08:43:45 -27.6 Dark Down 22.2 142.7 Low 08:28:45 - 08:58:45 -276
Victoria 08:43:53 -26.9 Dark Down 20.1 140.1 Low 08:28:53 - 08:58:53 -289
Dunrhomin 08:42:52 -30.4 Dark Up 33.8 156.2 Up 08:27:52 - 08:57:52 -303
Ellensburg 08:43:47 -28.1 Dark Down 22.4 142.4 Low 08:28:47 - 08:58:47 -312
CU-SBO 08:42:52 -30.7 Dark Up 34.0 156.0 Up 08:27:52 - 08:57:52 -324
PNWRO 08:43:43 -28.8 Dark Down 23.9 143.7 Low 08:28:43 - 08:58:43 -333
Yakima 08:43:47 -28.5 Dark Down 22.8 142.3 Low 08:28:47 - 08:58:47 -342
Toppenish/White Swan 08:43:47 -28.7 Dark Down 23.0 142.4 Low 08:28:47 - 08:58:47 -353
Goldendale 08:43:49 -29.3 Dark Down 23.3 141.9 Low 08:28:49 - 08:58:49 -406
The Dalles 08:43:51 -29.5 Dark Down 23.3 141.5 Low 08:28:51 - 08:58:51 -435
Maupin 08:43:51 -29.9 Dark Down 23.6 141.5 Low 08:28:51 - 08:58:51 -462
Sisters 08:43:54 -30.9 Dark Down 24.1 140.8 Low 08:28:54 - 08:58:54 -544
Bend 08:43:53 -31.1 Dark Down 24.4 140.9 Low 08:28:53 - 08:58:53 -554
Oregon Observatory 08:43:54 -31.3 Dark Down 24.5 140.8 Low 08:28:54 - 08:58:54 -571
North Lake 08:43:53 -31.8 Dark Down 25.2 141.1 Low 08:28:53 - 08:58:53 -602
Lakeview 08:43:52 -32.7 Dark Down 26.3 141.3 Low 08:28:52 - 08:58:52 -666
Chiloquin 08:43:57 -32.6 Dark Down 25.3 140.0 Low 08:28:57 - 08:58:57 -686
Klamath Falls 08:43:58 -32.9 Dark Down 25.6 140.0 Low 08:28:58 - 08:58:58 -710
Cedarville 08:43:52 -33.4 Dark Down 26.9 141.3 Low 08:28:52 - 08:58:52 -711
Fall River/Burney 08:43:57 -34.0 Dark Down 26.7 140.0 Low 08:28:57 - 08:58:57 -790
Susanville 08:43:55 -34.5 Dark Down 27.6 140.4 Low 08:28:55 - 08:58:55 -815
Gimple 08:43:56 -34.8 Dark Down 27.7 140.2 Low 08:28:56 - 08:58:56 -845
Greenville 08:43:56 -34.8 Dark Down 27.6 140.1 Low 08:28:56 - 08:58:56 -848
Reno 08:43:53 -35.2 Dark Down 28.6 140.9 Low 08:28:53 - 08:58:53 -857
Portola 08:43:55 -35.1 Dark Down 28.1 140.4 Low 08:28:55 - 08:58:55 -857
Quincy 08:43:57 -35.0 Dark Down 27.8 140.0 Low 08:28:57 - 08:58:57 -864
Yerington 08:43:51 -35.6 Dark Down 29.4 141.4 Low 08:28:51 - 08:58:51 -878
Carson City 08:43:53 -35.6 Dark Down 28.9 140.8 Low 08:28:53 - 08:58:53 -885
Tonopah 08:43:43 -36.1 Dark Down 31.0 142.9 Up 08:28:43 - 08:58:43 -885
Hawthorne 08:43:49 -36.0 Dark Down 30.0 141.7 Low 08:28:49 - 08:58:49 -898
Gardnerville 08:43:53 -35.8 Dark Down 29.1 140.8 Low 08:28:53 - 08:58:53 -903
Indian Springs 08:43:38 -37.1 Dark Down 32.9 143.9 Up 08:28:38 - 08:58:38 -952
Lee Vining 08:43:51 -36.6 Dark Down 30.2 141.1 Up 08:28:51 - 08:58:51 -960
Beatty 08:43:42 -37.1 Dark Down 32.2 142.9 Up 08:28:42 - 08:58:42 -964
Henderson 08:43:35 -37.5 Dark Up 33.7 144.4 Up 08:28:35 - 08:58:35 -971
Patrick 08:43:30 -37.7 Dark Up 34.7 145.3 Up 08:28:30 - 08:58:30 -981
Bishop 08:43:48 -37.0 Dark Down 31.0 141.5 Up 08:28:48 - 08:58:48 -984
Kingman/Dolan Springs 08:43:31 -38.0 Dark Up 34.8 145.0 Up 08:28:31 - 08:58:31 -1006
Laughlin/Bullhead City 08:43:34 -38.2 Dark Up 34.6 144.5 Up 08:28:34 - 08:58:34 -1028
George/Scottsdale 08:43:22 -38.6 Dark Up 37.0 146.7 Up 08:28:22 - 08:58:22 -1048
Mohave Valley 08:43:33 -38.4 Dark Up 34.8 144.4 Up 08:28:33 - 08:58:33 -1050
Lake Havasu City 08:43:33 -38.7 Dark Up 35.3 144.5 Up 08:28:33 - 08:58:33 -1074
Parker 08:43:33 -39.0 Dark Up 35.6 144.3 Up 08:28:33 - 08:58:33 -1102
Idyllwild 08:43:43 -40.1 Dark Up 34.7 141.7 Up 08:28:43 - 08:58:43 -1225
Calipatria 08:43:38 -40.3 Dark Up 35.8 142.6 Up 08:28:38 - 08:58:38 -1234
Yuma 08:43:34 -40.5 Dark Up 36.6 143.4 Up 08:28:34 - 08:58:34 -1237
Wildwood 08:43:51 -40.2 Dark Down 33.4 140.0 Up 08:28:51 - 08:58:51 -1265

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 469707, (2027/04/28 08:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.27  53
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.05  45
53Nu Ser       17:20:49.7 -12:50:49  4.0  1.55  44
PPM 233084     17:27:02.2 -12:30:46  6.6  0.23  42
PPM 233089     17:27:11.3 -12:42:05  9.8  0.04  42
469707         17:27:11.1 -12:44:34 12.9        42
Positions are for J2000

Event circumstances last updated at 2022/05/06 22:42:36 UT

Marc W. Buie, Southwest Research Institute

RECON