RECON: TNO occultation with 308460

Event between (308460) 05SC278 and star GA1040:00221090 with event index number of 2185914

Geocentric closest approach at 2024/09/20 10:36:21 UTC

J2000 position of star is 02:19:17.5 +14:09:05
Equinox of date position of star is 02:20:30.2 +14:15:10
Stellar brightness G=14.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 7 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 33.1 AU from the Sun and 32.3 AU from the Earth.
The TNO is moving 17.8 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 175 seconds.
The 1-sigma cross-track error in the shadow position is 1674 km.
The sky-plane scale is 23410.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 11.7 sec chord
Diameter=85.3 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is 5:4E
 
 
 
 
 
 

Star training set for 308460, (2024/09/20 10:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:20.5 +16:33:26  0.8 32.99  40
6Bet Ari       01:56:00.6 +20:55:40  2.6  8.88   7
19 Ari         02:14:24.5 +15:23:40  5.7  1.88   5
PPM 118133     02:21:34.5 +14:24:36  8.5  0.27   7
PPM 118114     02:19:54.8 +14:03:47  9.3  0.27   6
308460         02:20:38.3 +14:15:51 14.4         7
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 5.1 sigma about the mid-time.
The median site spacing is 26.2 km RECON observability=1.0 and success probability=19.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 10:35:03 -28.3 Dark Up 53.4 185.5 Up 10:20:03 - 10:50:03 -1310
Kelowna 10:35:01 -28.4 Dark Up 54.1 187.1 Up 10:20:01 - 10:50:01 -1399
Peachland 10:35:02 -28.6 Dark Up 54.3 186.6 Up 10:20:02 - 10:50:02 -1403
Summerland 10:35:02 -28.7 Dark Up 54.4 186.8 Up 10:20:02 - 10:50:02 -1418
Penticton 10:35:02 -28.7 Dark Up 54.5 187.0 Up 10:20:02 - 10:50:02 -1426
Victoria 10:35:18 -31.2 Dark Up 55.6 180.7 Up 10:20:18 - 10:50:18 -1430
Sleaford 10:34:10 -20.3 Dark Up 49.5 206.9 Up 10:19:10 - 10:49:10 -1449
Oliver 10:35:02 -28.9 Dark Up 54.8 187.1 Up 10:20:02 - 10:50:02 -1457
Anarchist Mountain Observatory 10:35:01 -28.9 Dark Up 55.0 187.4 Up 10:20:01 - 10:50:01 -1476
Tonasket 10:35:02 -29.2 Dark Up 55.3 187.4 Up 10:20:02 - 10:50:02 -1503
Okanogan 10:35:03 -29.5 Dark Up 55.6 187.2 Up 10:20:03 - 10:50:03 -1529
Brewster 10:35:04 -29.7 Dark Up 55.9 186.9 Up 10:20:04 - 10:50:04 -1549
Manson/Chelan 10:35:06 -30.1 Dark Up 56.1 186.3 Up 10:20:06 - 10:50:06 -1560
Wenatchee 10:35:07 -30.5 Dark Up 56.6 186.1 Up 10:20:07 - 10:50:07 -1599
Ellensburg 10:35:09 -30.8 Dark Up 57.0 185.8 Up 10:20:09 - 10:50:09 -1631
Yakima 10:35:09 -31.1 Dark Up 57.4 185.8 Up 10:20:09 - 10:50:09 -1667
Toppenish/White Swan 10:35:10 -31.2 Dark Up 57.7 186.1 Up 10:20:10 - 10:50:10 -1691
Goldendale 10:35:11 -31.8 Dark Up 58.2 185.5 Up 10:20:11 - 10:50:11 -1731
The Dalles 10:35:13 -32.1 Dark Up 58.5 184.8 Up 10:20:13 - 10:50:13 -1743
PNWRO 10:35:04 -30.6 Dark Up 57.9 188.9 Up 10:20:04 - 10:50:04 -1758
Maupin 10:35:13 -32.3 Dark Up 58.9 185.1 Up 10:20:13 - 10:50:13 -1784
Sisters 10:35:17 -33.1 Dark Up 59.8 184.3 Up 10:20:17 - 10:50:17 -1853
Bend 10:35:16 -33.2 Dark Up 60.0 184.8 Up 10:20:16 - 10:50:16 -1881
Oregon Observatory 10:35:17 -33.3 Dark Up 60.2 184.6 Up 10:20:17 - 10:50:17 -1894
North Lake 10:35:16 -33.5 Dark Up 60.8 185.8 Up 10:20:16 - 10:50:16 -1967
Chiloquin 10:35:21 -34.4 Dark Up 61.5 184.0 Up 10:20:21 - 10:50:21 -2007
Klamath Falls 10:35:21 -34.6 Dark Up 61.9 184.2 Up 10:20:21 - 10:50:21 -2041
Lakeview 10:35:15 -33.8 Dark Up 61.8 187.1 Up 10:20:15 - 10:50:15 -2080
Cedarville 10:35:15 -34.1 Dark Up 62.4 187.6 Up 10:20:15 - 10:50:15 -2146
Fall River/Burney 10:35:21 -35.1 Dark Up 63.0 185.2 Up 10:20:21 - 10:50:21 -2162
Susanville 10:35:19 -35.1 Dark Up 63.6 186.9 Up 10:20:19 - 10:50:19 -2241
Greenville 10:35:20 -35.5 Dark Up 63.9 186.3 Up 10:20:20 - 10:50:20 -2260
Gimple 10:35:20 -35.4 Dark Up 63.9 186.5 Up 10:20:20 - 10:50:20 -2262
Quincy 10:35:21 -35.6 Dark Up 64.1 186.4 Up 10:20:21 - 10:50:21 -2280
Portola 10:35:19 -35.4 Dark Up 64.2 187.5 Up 10:20:19 - 10:50:19 -2304
Reno 10:35:16 -35.1 Dark Up 64.4 189.0 Up 10:20:16 - 10:50:16 -2346
Carson City 10:35:17 -35.3 Dark Up 64.7 189.1 Up 10:20:17 - 10:50:17 -2381
Gardnerville 10:35:17 -35.5 Dark Up 65.0 189.3 Up 10:20:17 - 10:50:17 -2406
Yerington 10:35:14 -35.1 Dark Up 64.8 190.6 Up 10:20:14 - 10:50:14 -2416
Hawthorne 10:35:12 -35.0 Dark Up 65.2 192.0 Up 10:20:12 - 10:50:12 -2475
Lee Vining 10:35:15 -35.6 Dark Up 65.8 191.1 Up 10:20:15 - 10:50:15 -2518
Tonopah 10:35:06 -34.4 Dark Up 65.4 195.4 Up 10:20:06 - 10:50:06 -2556
Bishop 10:35:13 -35.5 Dark Up 66.3 193.1 Up 10:20:13 - 10:50:13 -2595
Dunrhomin 10:34:10 -25.3 Dark Up 59.4 216.8 Up 10:19:10 - 10:49:10 -2600
CU-SBO 10:34:11 -25.5 Dark Up 59.6 216.9 Up 10:19:11 - 10:49:11 -2623
Beatty 10:35:06 -34.7 Dark Up 66.4 197.2 Up 10:20:06 - 10:50:06 -2683
Indian Springs 10:35:01 -34.2 Dark Up 66.4 199.9 Up 10:20:01 - 10:50:01 -2742
Henderson 10:34:58 -34.0 Dark Up 66.7 201.9 Up 10:19:58 - 10:49:58 -2813
Patrick 10:34:54 -33.5 Dark Up 67.0 205.1 Up 10:19:54 - 10:49:54 -2903
Laughlin/Bullhead City 10:34:57 -34.1 Dark Up 67.4 203.7 Up 10:19:57 - 10:49:57 -2911
Wildwood 10:35:18 -37.5 Dark Up 69.5 194.6 Up 10:20:18 - 10:50:18 -2917
Kingman/Dolan Springs 10:34:55 -33.8 Dark Up 67.2 204.9 Up 10:19:55 - 10:49:55 -2921
Mohave Valley 10:34:58 -34.3 Dark Up 67.7 204.0 Up 10:19:58 - 10:49:58 -2939
Lake Havasu City 10:34:57 -34.3 Dark Up 68.0 205.0 Up 10:19:57 - 10:49:57 -2986
Idyllwild 10:35:10 -36.3 Dark Up 69.4 199.8 Up 10:20:10 - 10:50:10 -3003
Parker 10:34:58 -34.4 Dark Up 68.3 205.4 Up 10:19:58 - 10:49:58 -3022
Calipatria 10:35:05 -35.8 Dark Up 69.6 203.5 Up 10:20:05 - 10:50:05 -3096
George/Scottsdale 10:34:46 -32.9 Dark Up 67.7 211.6 Up 10:19:46 - 10:49:46 -3125
Yuma 10:35:01 -35.4 Dark Up 69.7 206.3 Up 10:20:01 - 10:50:01 -3163

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 308460, (2024/09/20 10:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 32.99  40
6Bet Ari       01:54:38.5 +20:48:26  2.6  8.88   7
19 Ari         02:13:03.4 +15:16:47  5.7  1.88   5
PPM 118133     02:20:13.6 +14:17:51  8.5  0.27   7
PPM 118114     02:18:34.1 +13:57:00  9.3  0.27   6
308460         02:19:17.5 +14:09:05 14.4         7
Positions are for J2000

Event circumstances last updated at 2022/03/29 23:16:55 UT

Marc W. Buie, Southwest Research Institute

RECON