RECON: TNO occultation with 310071

Event between (310071) 10KR59 and star GA0560:16423811 with event index number of 2188496

Geocentric closest approach at 2027/05/22 10:17:43 UTC

J2000 position of star is 17:04:48.5 -33:41:42
Equinox of date position of star is 17:06:23.8 -33:43:36
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 9 degrees from the moon. Moon is 96% illuminated.
Apparent brightness V=21.5

[RECON map]
Object is 23.6 AU from the Sun and 22.6 AU from the Earth.
Apparent velocity is 22.8 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 78 seconds.
The 1-sigma cross-track error in the shadow position is 1060 km.
The sky-plane scale is 16391.4 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, (2027/05/22 10:17UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.5 -26:29:25  0.9 10.55  14
26Eps Sco      16:51:56.8 -34:20:24  2.3  3.10  11
PPM 295869     17:06:37.7 -34:09:32  4.7  0.43   9
PPM 295878     17:07:08.7 -33:48:08  7.6  0.13   9
310071         17:06:36.4 -33:43:50 16.6         8
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 0.0 km RECON observability=0.0 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)
Victoria 10:16:45 -15.5 AT Up 6.8 192.0 Really Low 10:09:45 - 10:23:45 8059
Kamloops 10:16:38 -12.7 AT Up 4.2 194.5 Really Low 10:09:38 - 10:23:38 8050
Peachland 10:16:35 -13.2 AT Up 5.0 195.0 Really Low 10:09:35 - 10:23:35 8027
Kelowna 10:16:34 -13.0 AT Up 4.9 195.2 Really Low 10:09:34 - 10:23:34 8024
Summerland 10:16:34 -13.3 AT Up 5.2 195.0 Really Low 10:09:34 - 10:23:34 8023
Penticton 10:16:34 -13.3 AT Up 5.2 195.1 Really Low 10:09:34 - 10:23:34 8020
Oliver 10:16:33 -13.6 AT Up 5.6 195.1 Really Low 10:09:33 - 10:23:33 8014
Anarchist Mountain Observatory 10:16:33 -13.7 AT Up 5.7 195.3 Really Low 10:09:33 - 10:23:33 8009
Manson/Chelan 10:16:34 -14.9 AT Up 6.9 194.7 Really Low 10:09:34 - 10:23:34 8000
Okanogan 10:16:33 -14.3 AT Up 6.3 195.1 Really Low 10:09:33 - 10:23:33 8000
Brewster 10:16:33 -14.6 AT Up 6.6 195.0 Really Low 10:09:33 - 10:23:33 7998
Wenatchee 10:16:34 -15.4 AT Up 7.4 194.6 Really Low 10:09:34 - 10:23:34 7993
Ellensburg 10:16:35 -15.8 AT Up 7.8 194.4 Really Low 10:09:35 - 10:23:35 7988
Yakima 10:16:34 -16.2 AT Up 8.2 194.4 Really Low 10:09:34 - 10:23:34 7980
Toppenish/White Swan 10:16:33 -16.3 AT Up 8.4 194.5 Really Low 10:09:33 - 10:23:33 7972
The Dalles 10:16:35 -17.2 AT Up 9.3 193.9 Really Low 10:09:35 - 10:23:35 7967
Maupin 10:16:35 -17.5 AT Up 9.7 194.0 Really Low 10:09:35 - 10:23:35 7956
Sisters 10:16:35 -18.5 Dark Up 10.6 193.7 Really Low 10:09:35 - 10:23:35 7942
PNWRO 10:16:28 -16.0 AT Up 8.5 195.8 Really Low 10:09:28 - 10:23:28 7939
Bend 10:16:34 -18.6 Dark Up 10.8 193.9 Really Low 10:09:34 - 10:23:34 7932
Oregon Observatory 10:16:34 -18.8 Dark Up 11.0 193.8 Really Low 10:09:34 - 10:23:34 7930
Chiloquin 10:16:34 -20.0 Dark Up 12.4 193.5 Really Low 10:09:34 - 10:23:34 7900
Klamath Falls 10:16:34 -20.3 Dark Up 12.7 193.6 Really Low 10:09:34 - 10:23:34 7889
Fall River/Burney 10:16:32 -21.1 Dark Up 13.8 194.0 Really Low 10:09:32 - 10:23:32 7846
Cedarville 10:16:28 -20.2 Dark Up 13.1 194.9 Really Low 10:09:28 - 10:23:28 7840
Greenville 10:16:30 -21.7 Dark Up 14.6 194.4 Really Low 10:09:30 - 10:23:30 7809
Gimple 10:16:29 -21.7 Dark Up 14.5 194.4 Really Low 10:09:29 - 10:23:29 7807
Quincy 10:16:29 -21.9 Dark Up 14.8 194.4 Really Low 10:09:29 - 10:23:29 7802
Sleaford 10:16:00 -6.0 CT Up -0.2 205.9 Not Up 10:09:00 - 10:23:00 7800
Portola 10:16:27 -21.8 Dark Up 14.8 194.8 Really Low 10:09:27 - 10:23:27 7790
Reno 10:16:25 -21.7 Dark Up 14.9 195.3 Really Low 10:09:25 - 10:23:25 7769
Carson City 10:16:25 -22.0 Dark Up 15.3 195.4 Really Low 10:09:25 - 10:23:25 7756
Gardnerville 10:16:24 -22.1 Dark Up 15.5 195.4 Really Low 10:09:24 - 10:23:24 7746
Yerington 10:16:22 -21.8 Dark Up 15.3 195.9 Really Low 10:09:22 - 10:23:22 7737
Hawthorne 10:16:20 -22.0 Dark Up 15.6 196.4 Really Low 10:09:20 - 10:23:20 7709
Lee Vining 10:16:21 -22.7 Dark Up 16.3 196.0 Really Low 10:09:21 - 10:23:21 7699
Bishop 10:16:18 -22.8 Dark Up 16.7 196.7 Really Low 10:09:18 - 10:23:18 7661
Beatty 10:16:12 -22.4 Dark Up 16.8 198.1 Really Low 10:09:12 - 10:23:12 7608
Wildwood 10:16:17 -25.5 Dark Up 19.9 196.8 Really Low 10:09:17 - 10:23:17 7527
Laughlin/Bullhead City 10:16:03 -22.6 Dark Up 17.8 200.0 Really Low 10:09:03 - 10:23:03 7485
Patrick 10:16:01 -22.0 Dark Up 17.4 200.6 Really Low 10:09:01 - 10:23:01 7480
Idyllwild 10:16:09 -24.8 Dark Up 19.8 198.4 Really Low 10:09:09 - 10:23:09 7472
Lake Havasu City 10:16:02 -23.0 Dark Up 18.4 200.3 Really Low 10:09:02 - 10:23:02 7449
Dunrhomin 10:15:38 -13.8 AT Up 10.2 206.9 Really Low 10:08:38 - 10:22:38 7449
Nikitin 10:15:38 -14.0 AT Up 10.4 206.9 Really Low 10:08:38 - 10:22:38 7443
CU-SBO 10:15:38 -14.0 AT Up 10.5 206.9 Really Low 10:08:38 - 10:22:38 7443
Calipatria 10:16:04 -24.6 Dark Up 20.0 199.5 Low 10:09:04 - 10:23:04 7415
Yuma 10:16:01 -24.5 Dark Up 20.2 200.3 Low 10:09:01 - 10:23:01 7373
George/Scottsdale 10:15:52 -22.2 Dark Up 18.4 202.4 Really Low 10:08:52 - 10:22:52 7352

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, (2027/05/22 10:17UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.55  14
26Eps Sco      16:50:08.8 -34:17:41  2.3  3.10  11
PPM 295869     17:04:49.3 -34:07:23  4.7  0.43   9
PPM 295878     17:05:20.7 -33:46:00  7.6  0.13   9
310071         17:04:48.5 -33:41:42 16.6         9
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:22:43 UT

Marc W. Buie, Southwest Research Institute

RECON