RECON: TNO occultation with 535994

Event between (535994) 15BH519 and star GA0680:05660970 with event index number of 2257634

Geocentric closest approach at 2027/05/27 07:11:24 UTC

J2000 position of star is 13:26:41.1 -21:12:31
Equinox of date position of star is 13:28:01.1 -21:20:06
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 62% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 38.1 AU from the Sun and 37.3 AU from the Earth.
Apparent velocity is 18.7 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 139 seconds.
The 1-sigma cross-track error in the shadow position is 2661 km.
The sky-plane scale is 27077.4 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 17.7 sec chord
Diameter=135.2 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 535994, (2027/05/27 07:16UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:38.5 -11:18:12  1.0 10.05 118
PPM 261604     13:25:26.3 -21:04:01  6.4  0.70 114
PPM 261643     13:27:25.9 -21:13:23  9.5  0.22 114
535994         13:28:10.6 -21:21:01 15.1       113
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 4.9 km RECON observability=0.5 and success probability=3.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:11:21 -16.6 AT Down 6.9 221.5 Really Low 06:59:16 - 07:23:25 -706
Kamloops 07:11:59 -17.3 AT Down 13.2 209.2 Really Low 06:59:54 - 07:24:03 -865
Kelowna 07:11:53 -18.2 Dark Down 13.7 210.0 Really Low 06:59:49 - 07:23:58 -867
Peachland 07:11:54 -18.3 Dark Down 13.8 209.8 Really Low 06:59:50 - 07:23:59 -873
Penticton 07:11:53 -18.5 Dark Down 14.0 210.0 Really Low 06:59:48 - 07:23:57 -874
Summerland 07:11:54 -18.5 Dark Down 13.9 209.9 Really Low 06:59:49 - 07:23:58 -874
Anarchist Mountain Observatory 07:11:51 -19.1 Dark Down 14.4 210.2 Really Low 06:59:47 - 07:23:56 -880
Oliver 07:11:52 -18.9 Dark Down 14.3 210.0 Really Low 06:59:47 - 07:23:56 -881
Okanogan 07:11:50 -19.7 Dark Down 15.0 210.1 Really Low 06:59:45 - 07:23:54 -897
Brewster 07:11:49 -19.9 Dark Down 15.3 210.0 Really Low 06:59:45 - 07:23:54 -906
Manson/Chelan 07:11:50 -20.1 Dark Down 15.6 209.7 Really Low 06:59:45 - 07:23:54 -916
Wenatchee 07:11:49 -20.5 Dark Down 16.1 209.6 Really Low 06:59:45 - 07:23:54 -929
PNWRO 07:11:40 -22.1 Dark Down 16.8 211.0 Really Low 06:59:36 - 07:23:45 -941
Ellensburg 07:11:49 -20.9 Dark Down 16.5 209.4 Really Low 06:59:44 - 07:23:53 -941
Yakima 07:11:48 -21.3 Dark Down 16.9 209.5 Really Low 06:59:43 - 07:23:52 -952
Victoria 07:12:03 -19.0 Dark Down 16.0 206.7 Really Low 06:59:59 - 07:24:08 -954
Toppenish/White Swan 07:11:46 -21.5 Dark Down 17.0 209.7 Really Low 06:59:42 - 07:23:51 -954
Dunrhomin 07:10:33 -28.4 Dark Up 15.4 223.5 Really Low 06:58:28 - 07:22:37 -961
Nikitin 07:10:32 -28.6 Dark Up 15.5 223.6 Really Low 06:58:28 - 07:22:37 -967
CU-SBO 07:10:32 -28.7 Dark Up 15.6 223.5 Really Low 06:58:28 - 07:22:37 -969
The Dalles 07:11:47 -22.2 Dark Down 17.9 209.1 Really Low 06:59:42 - 07:23:51 -987
Maupin 07:11:45 -22.6 Dark Down 18.3 209.2 Really Low 06:59:41 - 07:23:50 -996
Sisters 07:11:44 -23.4 Dark Down 19.2 208.9 Really Low 06:59:40 - 07:23:49 -1028
Bend 07:11:43 -23.6 Dark Down 19.3 209.2 Really Low 06:59:39 - 07:23:48 -1030
Oregon Observatory 07:11:43 -23.8 Dark Down 19.5 209.1 Really Low 06:59:39 - 07:23:48 -1038
Chiloquin 07:11:41 -25.0 Dark Down 20.8 208.9 Low 06:59:36 - 07:23:45 -1085
Cedarville 07:11:31 -26.3 Dark Down 21.1 210.6 Low 06:59:27 - 07:23:36 -1090
Klamath Falls 07:11:39 -25.4 Dark Down 21.1 209.1 Low 06:59:35 - 07:23:44 -1095
Fall River/Burney 07:11:35 -26.6 Dark Down 22.0 209.6 Low 06:59:30 - 07:23:39 -1128
Gimple 07:11:30 -27.5 Dark Down 22.6 210.3 Low 06:59:25 - 07:23:34 -1150
Greenville 07:11:30 -27.5 Dark Down 22.6 210.2 Low 06:59:25 - 07:23:34 -1152
Reno 07:11:24 -28.3 Dark Down 22.7 211.3 Low 06:59:20 - 07:23:29 -1154
Portola 07:11:27 -27.9 Dark Down 22.7 210.7 Low 06:59:23 - 07:23:32 -1155
Quincy 07:11:29 -27.7 Dark Down 22.8 210.2 Low 06:59:25 - 07:23:34 -1159
Yerington 07:11:20 -28.9 Dark Down 22.9 212.1 Low 06:59:15 - 07:23:24 -1163
Carson City 07:11:23 -28.6 Dark Down 23.0 211.4 Low 06:59:18 - 07:23:27 -1167
Hawthorne 07:11:16 -29.5 Dark Down 23.1 212.6 Low 06:59:12 - 07:23:21 -1172
Gardnerville 07:11:22 -28.9 Dark Down 23.2 211.5 Low 06:59:17 - 07:23:26 -1175
Lee Vining 07:11:17 -29.9 Dark Down 23.8 212.3 Low 06:59:12 - 07:23:21 -1202
Beatty 07:11:04 -31.3 Dark Down 23.6 214.6 Low 06:58:59 - 07:23:08 -1207
Bishop 07:11:12 -30.6 Dark Down 24.0 213.1 Low 06:59:07 - 07:23:16 -1214
Patrick 07:10:47 -33.1 Dark Down 23.5 217.5 Low 06:58:43 - 07:22:52 -1228
Laughlin/Bullhead City 07:10:50 -33.3 Dark Down 24.0 217.0 Low 06:58:45 - 07:22:54 -1249
Lake Havasu City 07:10:47 -34.0 Dark Down 24.5 217.4 Low 06:58:43 - 07:22:52 -1275
George/Scottsdale 07:10:34 -34.9 Dark Down 23.8 219.6 Low 06:58:29 - 07:22:38 -1278
Idyllwild 07:10:54 -34.4 Dark Down 26.2 215.5 Low 06:58:49 - 07:22:58 -1344
Calipatria 07:10:47 -35.2 Dark Down 26.2 216.7 Low 06:58:42 - 07:22:51 -1356
Wildwood 07:11:03 -33.8 Dark Down 26.8 213.7 Low 06:58:58 - 07:23:07 -1360
Yuma 07:10:41 -35.7 Dark Down 26.1 217.6 Low 06:58:37 - 07:22:46 -1363

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 535994, (2027/05/27 07:16UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 10.05 118
PPM 261604     13:23:57.0 -20:55:29  6.4  0.70 114
PPM 261643     13:25:56.4 -21:04:53  9.5  0.22 114
535994         13:26:41.1 -21:12:31 15.1       113
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:28:25 UT

Marc W. Buie, Southwest Research Institute

RECON