RECON: TNO occultation with 310071

Event between (310071) 10KR59 and star GA0560:14319500 with event index number of 2188600

Geocentric closest approach at 2027/06/25 06:19:09 UTC

J2000 position of star is 16:59:12.5 -33:39:44
Equinox of date position of star is 17:00:47.7 -33:41:50
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 85 degrees from the moon. Moon is 69% illuminated.
Apparent brightness V=21.5

[RECON map]
Object is 23.6 AU from the Sun and 22.7 AU from the Earth.
Apparent velocity is 22.7 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 76 seconds.
The 1-sigma cross-track error in the shadow position is 1052 km.
The sky-plane scale is 16434.5 km/arcsec.

The object has an absolute magnitude Hv=7.8
Diameter=163.7 km assuming a 5% albedo -- 7.2 sec chord
Diameter=66.8 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 310071, (2027/06/25 06:19UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.8 -26:29:26  0.9  9.68  92
26Eps Sco      16:51:57.2 -34:20:24  2.3  1.98  87
27 Sco         16:58:58.9 -33:18:02  5.2  0.58  85
PPM 295741     17:00:50.4 -33:34:01  8.0  0.14  85
PPM 295747     17:01:04.6 -33:40:35  9.5  0.03  85
310071         17:01:00.7 -33:42:06 16.2        85
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 10.3 km RECON observability=0.2 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)
Sleaford 06:19:15 -13.8 AT Up 4.0 186.1 Really Low 06:12:26 - 06:26:04 7341
Kamloops 06:19:58 -12.5 AT Down 5.4 174.2 Really Low 06:13:09 - 06:26:47 7227
Kelowna 06:19:56 -13.4 AT Down 6.3 174.9 Really Low 06:13:07 - 06:26:45 7226
Peachland 06:19:57 -13.5 AT Down 6.4 174.6 Really Low 06:13:08 - 06:26:46 7221
Penticton 06:19:57 -13.7 AT Down 6.6 174.8 Really Low 06:13:08 - 06:26:46 7221
Summerland 06:19:56 -13.6 AT Down 6.5 174.7 Really Low 06:13:07 - 06:26:45 7220
Anarchist Mountain Observatory 06:19:56 -14.2 AT Down 7.2 175.0 Really Low 06:13:07 - 06:26:45 7216
Oliver 06:19:57 -14.0 AT Down 7.0 174.8 Really Low 06:13:08 - 06:26:46 7215
Okanogan 06:19:57 -14.8 AT Down 7.8 174.8 Really Low 06:13:08 - 06:26:46 7202
Brewster 06:19:58 -15.0 AT Down 8.0 174.6 Really Low 06:13:09 - 06:26:47 7195
Manson/Chelan 06:19:59 -15.0 AT Down 8.2 174.3 Really Low 06:13:10 - 06:26:48 7187
Wenatchee 06:20:00 -15.4 AT Down 8.7 174.1 Really Low 06:13:11 - 06:26:49 7176
PNWRO 06:19:55 -17.1 AT Down 10.2 175.3 Really Low 06:13:06 - 06:26:44 7167
Ellensburg 06:20:00 -15.7 AT Down 9.1 174.0 Really Low 06:13:11 - 06:26:49 7166
Yakima 06:20:00 -16.1 AT Down 9.5 173.9 Really Low 06:13:11 - 06:26:49 7158
Toppenish/White Swan 06:20:00 -16.4 AT Down 9.7 174.1 Really Low 06:13:11 - 06:26:49 7155
Victoria 06:20:08 -13.5 AT Down 7.3 171.6 Really Low 06:13:19 - 06:26:57 7155
The Dalles 06:20:03 -16.8 AT Down 10.4 173.4 Really Low 06:13:14 - 06:26:52 7128
Dunrhomin 06:19:07 -25.5 Dark Up 15.7 186.9 Really Low 06:12:18 - 06:25:56 7121
Maupin 06:20:03 -17.2 AT Down 10.9 173.5 Really Low 06:13:14 - 06:26:52 7121
Nikitin 06:19:07 -25.7 Dark Up 15.9 186.9 Really Low 06:12:18 - 06:25:56 7116
CU-SBO 06:19:07 -25.8 Dark Up 16.0 186.8 Really Low 06:12:18 - 06:25:56 7113
Sisters 06:20:05 -17.9 AT Down 11.7 173.0 Really Low 06:13:16 - 06:26:54 7093
Bend 06:20:04 -18.2 Dark Down 11.9 173.3 Really Low 06:13:15 - 06:26:53 7091
Oregon Observatory 06:20:05 -18.3 Dark Down 12.1 173.1 Really Low 06:13:16 - 06:26:54 7085
Chiloquin 06:20:07 -19.3 Dark Down 13.4 172.8 Really Low 06:13:18 - 06:26:56 7044
Cedarville 06:20:01 -20.8 Dark Down 14.5 174.2 Really Low 06:13:12 - 06:26:50 7039
Klamath Falls 06:20:06 -19.7 Dark Down 13.7 172.8 Really Low 06:13:17 - 06:26:55 7036
Fall River/Burney 06:20:05 -20.9 Dark Down 14.9 173.1 Really Low 06:13:16 - 06:26:54 7006
Gimple 06:20:04 -21.8 Dark Down 15.9 173.5 Really Low 06:13:15 - 06:26:53 6986
Greenville 06:20:04 -21.8 Dark Down 15.9 173.5 Really Low 06:13:15 - 06:26:53 6985
Reno 06:20:00 -22.7 Dark Down 16.5 174.4 Really Low 06:13:11 - 06:26:49 6982
Portola 06:20:03 -22.3 Dark Down 16.2 173.9 Really Low 06:13:14 - 06:26:52 6981
Quincy 06:20:04 -22.0 Dark Down 16.1 173.5 Really Low 06:13:15 - 06:26:53 6978
Yerington 06:19:58 -23.4 Dark Down 17.1 174.9 Really Low 06:13:09 - 06:26:47 6972
Carson City 06:20:00 -23.1 Dark Down 16.9 174.4 Really Low 06:13:11 - 06:26:49 6970
Hawthorne 06:19:56 -24.0 Dark Down 17.6 175.4 Really Low 06:13:07 - 06:26:45 6963
Gardnerville 06:20:00 -23.3 Dark Down 17.2 174.4 Really Low 06:13:11 - 06:26:49 6962
Lee Vining 06:19:58 -24.4 Dark Down 18.2 175.0 Really Low 06:13:09 - 06:26:47 6938
Beatty 06:19:49 -26.1 Dark Down 19.4 177.0 Really Low 06:13:00 - 06:26:38 6928
Bishop 06:19:55 -25.2 Dark Down 18.8 175.6 Really Low 06:13:06 - 06:26:44 6925
Patrick 06:19:38 -28.3 Dark Down 20.9 179.5 Low 06:12:49 - 06:26:27 6902
Laughlin/Bullhead City 06:19:41 -28.4 Dark Down 21.2 178.9 Low 06:12:52 - 06:26:30 6885
Lake Havasu City 06:19:39 -29.1 Dark Down 21.8 179.1 Low 06:12:50 - 06:26:28 6860
George/Scottsdale 06:19:30 -30.5 Dark Up 22.6 181.3 Low 06:12:41 - 06:26:19 6850
Idyllwild 06:19:49 -29.0 Dark Down 22.5 176.9 Low 06:13:00 - 06:26:38 6802
Wildwood 06:19:56 -28.1 Dark Down 22.1 175.3 Low 06:13:07 - 06:26:45 6792
Calipatria 06:19:44 -30.0 Dark Down 23.2 178.0 Low 06:12:55 - 06:26:33 6788
Yuma 06:19:41 -30.6 Dark Down 23.6 178.8 Low 06:12:52 - 06:26:30 6779

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 310071, (2027/06/25 06:19UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.68  92
26Eps Sco      16:50:08.8 -34:17:41  2.3  1.98  87
27 Sco         16:57:11.2 -33:15:35  5.2  0.58  85
PPM 295741     16:59:02.4 -33:31:38  8.0  0.14  85
PPM 295747     16:59:16.5 -33:38:13  9.5  0.03  85
310071         16:59:12.5 -33:39:44 16.2        85
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:27:35 UT

Marc W. Buie, Southwest Research Institute

RECON