RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA0860:00573207 with event index number of 2656276

Geocentric closest approach at 2027/12/13 07:31:40 UTC

J2000 position of star is 05:14:41.7 -03:14:29
Equinox of date position of star is 05:15:55.2 -03:12:54
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 30 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=18.8

[RECON map]
Object is 11.2 AU from the Sun and 10.3 AU from the Earth.
Apparent velocity is 37.8 km/sec on the sky relative to the star, or, 18.2 arcsec/hr.
The 1-sigma error in the time of the event is 18 seconds.
The 1-sigma cross-track error in the shadow position is 1678 km.
The sky-plane scale is 7485.3 km/arcsec.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 3.5 sec chord
Diameter=52.4 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2027/12/13 07:32UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:52.9 -08:10:17  0.1  4.96  35
67Bet Eri      05:09:13.5 -05:03:08  2.8  2.51  32
PPM 187787     05:12:43.6 -02:27:30  6.0  1.13  29
PPM 187857     05:16:47.4 -03:20:11  8.0  0.21  30
468861         05:16:05.6 -03:12:41 16.8        30
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 20.1 km RECON observability=1.0 and success probability=13.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 07:31:11 -62.1 Dark Up 35.9 174.5 Up 07:29:13 - 07:33:10 3303
Kelowna 07:31:10 -63.0 Dark Up 36.8 175.5 Up 07:29:12 - 07:33:09 3236
Peachland 07:31:11 -63.0 Dark Up 36.9 175.2 Up 07:29:12 - 07:33:09 3235
Victoria 07:31:18 -63.6 Dark Up 37.8 170.5 Up 07:29:20 - 07:33:17 3229
Summerland 07:31:11 -63.2 Dark Up 37.1 175.3 Up 07:29:12 - 07:33:09 3223
Penticton 07:31:10 -63.3 Dark Up 37.1 175.4 Up 07:29:12 - 07:33:09 3217
Oliver 07:31:11 -63.6 Dark Up 37.5 175.4 Up 07:29:12 - 07:33:09 3195
Anarchist Mountain Observatory 07:31:11 -63.8 Dark Up 37.7 175.6 Up 07:29:12 - 07:33:09 3180
Okanogan 07:31:11 -64.4 Dark Up 38.3 175.3 Up 07:29:13 - 07:33:10 3143
Brewster 07:31:12 -64.7 Dark Up 38.6 175.0 Up 07:29:13 - 07:33:10 3129
Manson/Chelan 07:31:13 -64.8 Dark Up 38.7 174.5 Up 07:29:14 - 07:33:11 3123
Sleaford 07:30:45 -60.4 Dark Up 34.0 191.9 Up 07:28:47 - 07:32:44 3114
Wenatchee 07:31:13 -65.3 Dark Up 39.2 174.3 Up 07:29:15 - 07:33:12 3095
Ellensburg 07:31:14 -65.6 Dark Up 39.6 174.0 Up 07:29:16 - 07:33:13 3072
Yakima 07:31:14 -66.0 Dark Up 40.0 173.9 Up 07:29:16 - 07:33:13 3046
Toppenish/White Swan 07:31:14 -66.2 Dark Up 40.2 174.1 Up 07:29:16 - 07:33:13 3027
The Dalles 07:31:16 -66.9 Dark Up 40.9 173.0 Up 07:29:18 - 07:33:15 2991
PNWRO 07:31:11 -66.8 Dark Up 40.7 176.0 Up 07:29:13 - 07:33:10 2971
Maupin 07:31:17 -67.3 Dark Up 41.4 173.1 Up 07:29:18 - 07:33:15 2960
Sisters 07:31:18 -68.0 Dark Up 42.2 172.4 Up 07:29:20 - 07:33:17 2910
Bend 07:31:18 -68.3 Dark Up 42.5 172.7 Up 07:29:19 - 07:33:16 2888
Oregon Observatory 07:31:18 -68.4 Dark Up 42.6 172.5 Up 07:29:20 - 07:33:17 2879
Chiloquin 07:31:20 -69.6 Dark Up 43.9 171.8 Up 07:29:22 - 07:33:19 2794
Klamath Falls 07:31:20 -69.9 Dark Up 44.2 171.8 Up 07:29:22 - 07:33:19 2767
Cedarville 07:31:17 -71.0 Dark Up 45.1 174.0 Up 07:29:19 - 07:33:16 2680
Fall River/Burney 07:31:20 -71.1 Dark Up 45.4 172.2 Up 07:29:22 - 07:33:19 2672
Greenville 07:31:20 -72.1 Dark Up 46.4 172.7 Up 07:29:21 - 07:33:18 2593
Gimple 07:31:20 -72.1 Dark Up 46.4 172.8 Up 07:29:21 - 07:33:18 2591
Quincy 07:31:20 -72.3 Dark Up 46.6 172.7 Up 07:29:21 - 07:33:18 2578
Portola 07:31:19 -72.5 Dark Up 46.7 173.4 Up 07:29:21 - 07:33:18 2558
Reno 07:31:18 -72.9 Dark Up 47.1 174.3 Up 07:29:19 - 07:33:16 2522
Carson City 07:31:18 -73.3 Dark Up 47.4 174.3 Up 07:29:20 - 07:33:17 2494
Gardnerville 07:31:18 -73.5 Dark Up 47.7 174.3 Up 07:29:20 - 07:33:17 2474
Yerington 07:31:17 -73.6 Dark Up 47.7 175.2 Up 07:29:19 - 07:33:16 2464
Hawthorne 07:31:16 -74.2 Dark Up 48.2 175.9 Up 07:29:18 - 07:33:15 2415
Lee Vining 07:31:17 -74.6 Dark Up 48.7 175.1 Up 07:29:19 - 07:33:16 2382
Bishop 07:31:16 -75.3 Dark Up 49.3 176.2 Up 07:29:18 - 07:33:15 2317
Beatty 07:31:13 -76.1 Dark Up 49.8 178.7 Up 07:29:14 - 07:33:11 2240
Dunrhomin 07:30:46 -71.3 Dark Up 45.4 195.2 Up 07:28:48 - 07:32:45 2231
Nikitin 07:30:46 -71.4 Dark Up 45.6 195.2 Up 07:28:48 - 07:32:45 2216
CU-SBO 07:30:46 -71.5 Dark Up 45.7 195.1 Up 07:28:48 - 07:32:45 2213
Wildwood 07:31:19 -78.4 Dark Up 52.6 175.6 Up 07:29:20 - 07:33:17 2053
Patrick 07:31:07 -77.7 Dark Up 51.3 183.2 Up 07:29:09 - 07:33:06 2045
Laughlin/Bullhead City 07:31:09 -78.0 Dark Up 51.6 182.1 Up 07:29:11 - 07:33:08 2042
Lake Havasu City 07:31:09 -78.6 Dark Up 52.2 182.5 Up 07:29:11 - 07:33:08 1979
Idyllwild 07:31:15 -79.2 Dark Up 53.0 178.7 Up 07:29:17 - 07:33:14 1976
Calipatria 07:31:12 -80.0 Dark Up 53.6 180.6 Up 07:29:14 - 07:33:11 1892
George/Scottsdale 07:31:04 -79.2 Dark Up 52.9 186.6 Up 07:29:05 - 07:33:02 1849
Yuma 07:31:11 -80.4 Dark Up 54.0 182.1 Up 07:29:12 - 07:33:09 1832

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 468861, (2027/12/13 07:32UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1  4.96  35
67Bet Eri      05:07:50.8 -05:05:13  2.8  2.51  32
PPM 187787     05:11:19.3 -02:29:27  6.0  1.13  29
PPM 187857     05:15:23.6 -03:21:57  8.0  0.21  30
468861         05:14:41.7 -03:14:29 16.8        30
Positions are for J2000

Event circumstances last updated at 2024/06/23 21:27:37 UT

Marc W. Buie, Southwest Research Institute

RECON