RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1260:03099166 with event index number of 2655308

Geocentric closest approach at 2025/01/07 05:16:08 UTC

J2000 position of star is 07:16:01.8 +37:21:45
Equinox of date position of star is 07:17:40.5 +37:19:03
Stellar brightness G=16.8, 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 53% illuminated.
Apparent brightness V=17.7

[RECON map]
Object is 8.8 AU from the Sun and 7.9 AU from the Earth.
Apparent velocity is 40.2 km/sec on the sky relative to the star, or, 25.4 arcsec/hr.
The 1-sigma error in the time of the event is 8 seconds.
The 1-sigma cross-track error in the shadow position is 401 km.
The sky-plane scale is 5703.5 km/arcsec.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 3.3 sec chord
Diameter=52.4 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2025/01/07 05:16UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:50.7 +27:57:49  1.1 11.18  93
65 Aur         07:23:42.7 +36:42:40  5.1  1.34  86
PPM 072604     07:17:31.0 +36:44:24  8.1  0.58  85
PPM 072621     07:18:29.7 +37:12:06  9.8  0.19  85
468861         07:17:42.8 +37:19:00 16.8        86
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 32.6 km RECON observability=1.0 and success probability=3.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:17:00 -46.5 Dark Up 56.9 96.8 Up 05:15:51 - 05:18:09 2636
Victoria 05:17:17 -45.5 Dark Up 55.1 91.1 Up 05:16:08 - 05:18:26 2547
Peachland 05:17:00 -47.2 Dark Up 57.3 95.9 Up 05:15:51 - 05:18:09 2542
Kelowna 05:17:00 -47.3 Dark Up 57.5 96.3 Up 05:15:51 - 05:18:09 2537
Summerland 05:17:00 -47.3 Dark Up 57.4 95.7 Up 05:15:51 - 05:18:09 2527
Penticton 05:17:00 -47.4 Dark Up 57.5 95.7 Up 05:15:51 - 05:18:09 2517
Oliver 05:17:11 -47.6 Dark Up 57.6 95.2 Up 05:16:02 - 05:18:20 2454
Anarchist Mountain Observatory 05:17:11 -47.8 Dark Up 57.7 95.1 Up 05:16:02 - 05:18:20 2432
Okanogan 05:17:12 -47.9 Dark Up 57.6 93.9 Up 05:16:03 - 05:18:21 2385
Brewster 05:17:13 -47.9 Dark Up 57.5 93.3 Up 05:16:04 - 05:18:22 2369
Manson/Chelan 05:17:14 -47.7 Dark Up 57.3 92.7 Up 05:16:05 - 05:18:23 2365
Wenatchee 05:17:15 -47.8 Dark Up 57.2 91.8 Up 05:16:06 - 05:18:24 2331
Ellensburg 05:17:16 -47.8 Dark Up 57.0 91.0 Up 05:16:07 - 05:18:25 2303
Yakima 05:17:17 -47.9 Dark Up 57.0 90.4 Up 05:16:08 - 05:18:26 2269
Sleaford 05:16:48 -53.2 Dark Up 65.1 114.9 Up 05:15:39 - 05:17:57 2262
Toppenish/White Swan 05:17:17 -48.1 Dark Up 57.1 90.2 Up 05:16:08 - 05:18:26 2243
The Dalles 05:17:19 -47.9 Dark Up 56.6 88.4 Up 05:16:10 - 05:18:28 2207
Maupin 05:17:20 -48.1 Dark Up 56.6 87.9 Up 05:16:11 - 05:18:29 2166
PNWRO 05:17:15 -49.2 Dark Up 58.2 90.7 Up 05:16:06 - 05:18:24 2151
Sisters 05:17:22 -48.0 Dark Up 56.3 86.2 Up 05:16:13 - 05:18:31 2110
Bend 05:17:22 -48.3 Dark Up 56.4 86.0 Up 05:16:13 - 05:18:31 2078
Oregon Observatory 05:17:22 -48.2 Dark Up 56.3 85.7 Up 05:16:13 - 05:18:31 2068
Chiloquin 05:17:25 -48.3 Dark Up 55.9 83.5 Up 05:16:16 - 05:18:34 1970
Klamath Falls 05:17:25 -48.4 Dark Up 55.9 83.1 Up 05:16:16 - 05:18:34 1936
Fall River/Burney 05:17:27 -49.0 Dark Up 56.1 81.5 Up 05:16:18 - 05:18:36 1814
Cedarville 05:17:24 -49.8 Dark Up 57.0 82.9 Up 05:16:15 - 05:18:33 1804
Greenville 05:17:28 -49.5 Dark Up 56.3 80.4 Up 05:16:19 - 05:18:37 1712
Gimple 05:17:28 -49.6 Dark Up 56.3 80.4 Up 05:16:19 - 05:18:37 1708
Quincy 05:17:28 -49.6 Dark Up 56.2 80.1 Up 05:16:19 - 05:18:37 1694
Portola 05:17:28 -50.0 Dark Up 56.6 80.1 Up 05:16:19 - 05:18:37 1661
Reno 05:17:27 -50.5 Dark Up 57.0 80.0 Up 05:16:18 - 05:18:36 1608
Carson City 05:17:28 -50.6 Dark Up 57.0 79.5 Up 05:16:19 - 05:18:37 1574
Gardnerville 05:17:28 -50.7 Dark Up 57.0 79.1 Up 05:16:19 - 05:18:37 1550
Yerington 05:17:27 -51.1 Dark Up 57.4 79.4 Up 05:16:18 - 05:18:36 1528
Hawthorne 05:17:27 -51.7 Dark Up 57.7 78.9 Up 05:16:18 - 05:18:36 1462
Lee Vining 05:17:28 -51.4 Dark Up 57.2 77.9 Up 05:16:19 - 05:18:37 1432
Bishop 05:17:28 -52.1 Dark Up 57.7 77.2 Up 05:16:19 - 05:18:37 1343
Beatty 05:17:26 -53.5 Dark Up 58.8 77.0 Up 05:16:17 - 05:18:35 1227
Dunrhomin 05:17:00 -60.7 Dark Up 68.2 88.6 Up 05:15:51 - 05:18:09 1096
Nikitin 05:17:00 -60.8 Dark Up 68.1 88.1 Up 05:15:51 - 05:18:09 1080
CU-SBO 05:17:00 -60.7 Dark Up 68.1 87.9 Up 05:15:51 - 05:18:09 1077
Wildwood 05:17:33 -52.5 Dark Up 56.7 72.3 Up 05:16:24 - 05:18:42 1046
Laughlin/Bullhead City 05:17:25 -55.5 Dark Up 60.1 74.7 Up 05:16:16 - 05:18:34 966
Patrick 05:17:24 -56.0 Dark Up 60.7 75.3 Up 05:16:15 - 05:18:33 958
Idyllwild 05:17:31 -54.1 Dark Up 58.0 72.0 Up 05:16:22 - 05:18:40 925
Lake Havasu City 05:17:26 -55.9 Dark Up 60.1 73.6 Up 05:16:17 - 05:18:35 890
Calipatria 05:17:29 -55.1 Dark Up 58.8 71.3 Up 05:16:20 - 05:18:38 812
Yuma 05:17:28 -55.9 Dark Up 59.4 70.6 Up 05:16:19 - 05:18:37 730
George/Scottsdale 05:17:23 -58.0 Dark Up 61.9 72.6 Up 05:16:14 - 05:18:32 707

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, (2025/01/07 05:16UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 11.18  93
65 Aur         07:22:02.4 +36:45:38  5.1  1.34  86
PPM 072604     07:15:50.4 +36:47:09  8.1  0.58  85
PPM 072621     07:16:48.8 +37:14:53  9.8  0.19  85
468861         07:16:01.8 +37:21:45 16.8        85
Positions are for J2000

Event circumstances last updated at 2024/06/12 03:42:01 UT

Marc W. Buie, Southwest Research Institute

RECON