RECON: TNO occultation with 60620

Event between (60620) 00FD8 and star GA0860:04493243 with event index number of 2248844

Geocentric closest approach at 2027/05/16 09:00:04 UTC

J2000 position of star is 15:16:27.6 -03:38:22
Equinox of date position of star is 15:17:37.7 -03:43:14
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 45 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 35.3 AU from the Sun and 34.4 AU from the Earth.
The TNO is moving 24.0 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 191 seconds.
The 1-sigma cross-track error in the shadow position is 1934 km.
The sky-plane scale is 24917.9 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=281.8 km assuming a 5% albedo -- 11.7 sec chord
Diameter=115.1 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is 7:4EEE
 
 
 
 
 
 

Star training set for 60620, (2027/05/16 08:59UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:55.1 +19:02:39  0.0 27.28  39
27Bet Lib      15:18:29.1 -09:28:56  2.6  5.75  45
PPM 198488     15:22:34.6 -05:55:19  5.4  2.48  46
PPM 198377     15:15:54.4 -03:27:54  7.7  0.57  45
PPM 198439     15:19:29.0 -03:32:06  9.4  0.45  46
PPM 198423     15:18:25.7 -04:04:51 10.1  0.37  45
60620          15:17:53.5 -03:44:20 14.8        46
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 4.7 sigma about the mid-time.
The median site spacing is 18.9 km RECON observability=1.0 and success probability=7.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:59:40 -14.2 AT Up 27.4 218.6 Low 08:44:40 - 09:14:40 4363
Kamloops 09:00:12 -18.9 Dark Up 33.2 203.4 Up 08:45:12 - 09:15:12 4063
Kelowna 09:00:08 -19.5 Dark Up 33.7 204.6 Up 08:45:08 - 09:15:08 4034
Peachland 09:00:08 -19.7 Dark Up 33.9 204.3 Up 08:45:08 - 09:15:08 4023
Summerland 09:00:08 -19.8 Dark Up 34.0 204.4 Up 08:45:08 - 09:15:08 4016
Penticton 09:00:08 -19.9 Dark Up 34.0 204.6 Up 08:45:08 - 09:15:08 4014
Oliver 09:00:07 -20.2 Dark Up 34.3 204.7 Up 08:45:07 - 09:15:07 3994
Anarchist Mountain Observatory 09:00:06 -20.3 Dark Up 34.4 205.0 Up 08:45:06 - 09:15:06 3989
Tonasket 09:00:06 -20.6 Dark Up 34.7 205.0 Up 08:45:06 - 09:15:06 3969
Okanogan 09:00:06 -21.0 Dark Up 35.1 204.9 Up 08:45:06 - 09:15:06 3947
Brewster 09:00:06 -21.3 Dark Up 35.4 204.7 Up 08:45:06 - 09:15:06 3928
Manson/Chelan 09:00:06 -21.6 Dark Up 35.7 204.4 Up 08:45:06 - 09:15:06 3909
Victoria 09:00:23 -21.5 Dark Up 35.9 200.4 Up 08:45:23 - 09:15:23 3888
Wenatchee 09:00:06 -22.0 Dark Up 36.2 204.3 Up 08:45:06 - 09:15:06 3877
Ellensburg 09:00:06 -22.5 Dark Up 36.6 204.2 Up 08:45:06 - 09:15:06 3849
Yakima 09:00:05 -22.9 Dark Up 37.0 204.3 Up 08:45:05 - 09:15:05 3823
PNWRO 08:59:59 -23.1 Dark Up 37.0 206.4 Up 08:44:59 - 09:14:59 3820
Toppenish/White Swan 09:00:04 -23.1 Dark Up 37.1 204.5 Up 08:45:04 - 09:15:04 3813
Goldendale 09:00:04 -23.7 Dark Up 37.8 204.2 Up 08:45:04 - 09:15:04 3771
The Dalles 09:00:05 -23.9 Dark Up 38.1 203.8 Up 08:45:05 - 09:15:05 3750
Maupin 09:00:04 -24.3 Dark Up 38.4 204.1 Up 08:45:04 - 09:15:04 3726
Dunrhomin 08:59:07 -24.2 Dark Up 36.0 224.1 Up 08:44:07 - 09:14:07 3705
CU-SBO 08:59:07 -24.5 Dark Up 36.2 224.1 Up 08:44:07 - 09:14:07 3686
Sisters 09:00:04 -25.3 Dark Up 39.4 203.8 Up 08:45:04 - 09:15:04 3660
Bend 09:00:03 -25.5 Dark Up 39.5 204.1 Up 08:45:03 - 09:15:03 3650
Oregon Observatory 09:00:03 -25.6 Dark Up 39.7 204.0 Up 08:45:03 - 09:15:03 3636
North Lake 09:00:00 -26.2 Dark Up 40.1 204.9 Up 08:45:00 - 09:15:00 3605
Lakeview 08:59:56 -27.1 Dark Up 40.9 206.0 Up 08:44:56 - 09:14:56 3546
Chiloquin 09:00:02 -27.0 Dark Up 41.0 204.0 Up 08:45:02 - 09:15:02 3540
Klamath Falls 09:00:01 -27.3 Dark Up 41.3 204.2 Up 08:45:01 - 09:15:01 3519
Cedarville 08:59:55 -27.7 Dark Up 41.5 206.5 Up 08:44:55 - 09:14:55 3505
Fall River/Burney 08:59:57 -28.4 Dark Up 42.3 205.1 Up 08:44:57 - 09:14:57 3446
Susanville 08:59:54 -28.8 Dark Up 42.6 206.3 Up 08:44:54 - 09:14:54 3418
Gimple 08:59:54 -29.1 Dark Up 42.9 206.1 Up 08:44:54 - 09:14:54 3393
Greenville 08:59:54 -29.2 Dark Up 43.0 206.0 Up 08:44:54 - 09:14:54 3392
Portola 08:59:52 -29.4 Dark Up 43.1 206.8 Up 08:44:52 - 09:14:52 3379
Quincy 08:59:54 -29.4 Dark Up 43.1 206.1 Up 08:44:54 - 09:14:54 3378
Reno 08:59:49 -29.5 Dark Up 43.1 207.7 Up 08:44:49 - 09:14:49 3374
Carson City 08:59:49 -29.8 Dark Up 43.4 207.9 Up 08:44:49 - 09:14:49 3349
Yerington 08:59:46 -29.9 Dark Up 43.4 208.8 Up 08:44:46 - 09:14:46 3348
Gardnerville 08:59:48 -30.0 Dark Up 43.6 208.0 Up 08:44:48 - 09:14:48 3332
Hawthorne 08:59:44 -30.2 Dark Up 43.6 209.6 Up 08:44:44 - 09:14:44 3326
Tonopah 08:59:38 -30.2 Dark Up 43.4 211.6 Up 08:44:38 - 09:14:38 3323
Lee Vining 08:59:44 -30.8 Dark Up 44.2 209.3 Up 08:44:44 - 09:14:44 3275
Beatty 08:59:34 -31.2 Dark Up 44.2 212.8 Up 08:44:34 - 09:14:34 3247
Bishop 08:59:41 -31.2 Dark Up 44.5 210.5 Up 08:44:41 - 09:14:41 3246
Indian Springs 08:59:30 -31.2 Dark Up 44.0 214.3 Up 08:44:30 - 09:14:30 3246
Henderson 08:59:27 -31.5 Dark Up 44.1 215.4 Up 08:44:27 - 09:14:27 3220
Patrick 08:59:22 -31.7 Dark Up 44.1 217.1 Up 08:44:22 - 09:14:22 3197
Kingman/Dolan Springs 08:59:22 -32.0 Dark Up 44.4 217.0 Up 08:44:22 - 09:14:22 3177
Laughlin/Bullhead City 08:59:24 -32.1 Dark Up 44.6 216.4 Up 08:44:24 - 09:14:24 3163
Mohave Valley 08:59:23 -32.4 Dark Up 44.9 216.5 Up 08:44:23 - 09:14:23 3143
Lake Havasu City 08:59:22 -32.7 Dark Up 45.1 217.1 Up 08:44:22 - 09:14:22 3118
George/Scottsdale 08:59:12 -32.5 Dark Up 44.4 220.5 Up 08:44:12 - 09:14:12 3110
Parker 08:59:21 -33.0 Dark Up 45.3 217.3 Up 08:44:21 - 09:14:21 3091
Idyllwild 08:59:28 -34.1 Dark Up 46.8 214.6 Up 08:44:28 - 09:14:28 3008
Wildwood 08:59:35 -34.4 Dark Up 47.4 211.9 Up 08:44:35 - 09:14:35 2993
Calipatria 08:59:23 -34.3 Dark Up 46.8 216.4 Up 08:44:23 - 09:14:23 2985
Yuma 08:59:19 -34.4 Dark Up 46.7 217.8 Up 08:44:19 - 09:14:19 2971

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 60620, (2027/05/16 08:59UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.0 +19:10:14  0.0 27.28  39
27Bet Lib      15:17:00.3 -09:22:59  2.6  5.75  45
PPM 198488     15:21:07.5 -05:49:30  5.4  2.48  46
PPM 198377     15:14:28.6 -03:21:53  7.7  0.57  45
PPM 198439     15:18:03.1 -03:26:11  9.4  0.45  46
PPM 198423     15:16:59.6 -03:58:54 10.1  0.37  45
60620          15:16:27.6 -03:38:22 14.8        45
Positions are for J2000

Event circumstances last updated at 2022/05/07 22:16:29 UT

Marc W. Buie, Southwest Research Institute

RECON