RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03720743 with event index number of 2744257

Geocentric closest approach at 2029/04/24 07:02:01 UTC

J2000 position of star is 06:38:36.7 +40:30:02
Equinox of date position of star is 06:40:18.2 +40:28:39
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 62 degrees from the moon. Moon is 76% illuminated.
Apparent brightness V=23.8

[RECON map]
Object is 27.3 AU from the Sun and 27.7 AU from the Earth.
Apparent velocity is 18.2 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 196 seconds.
The 1-sigma cross-track error in the shadow position is 1766 km.
The sky-plane scale is 20070.8 km/arcsec.

The object has an absolute magnitude Hv=9.2
Diameter=91.2 km assuming a 5% albedo -- 4.8 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2029/04/24 07:02UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:06.6 +27:57:11  1.1 18.53  44
34Bet Aur      06:01:40.8 +44:56:49  1.9  8.44  70
52Psi3Aur      06:40:51.5 +39:52:27  5.2  0.60  61
PPM 049235     06:42:24.8 +40:56:26  7.3  0.57  61
PPM 049217     06:41:11.1 +40:26:34 10.0  0.10  62
8405           06:40:39.8 +40:28:21 16.4        61
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 4.6 sigma about the mid-time.
The median site spacing is 5.8 km RECON observability=0.5 and success probability=3.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Nikitin 07:03:12 -36.9 Dark Up 10.7 314.8 Really Low 06:48:12 - 07:18:12 1853
CU-SBO 07:03:12 -37.0 Dark Up 10.7 314.8 Really Low 06:48:12 - 07:18:12 1852
Dunrhomin 07:03:12 -36.8 Dark Up 10.8 314.8 Really Low 06:48:12 - 07:18:12 1851
Sleaford 07:02:42 -24.9 Dark Up 19.4 312.0 Really Low 06:47:42 - 07:17:42 1739
George/Scottsdale 07:04:22 -43.0 Dark Up 10.0 312.5 Really Low 06:49:22 - 07:19:22 1512
PNWRO 07:03:12 -29.9 Dark Up 22.1 306.0 Low 06:48:12 - 07:18:12 1485
Patrick 07:04:19 -41.1 Dark Up 12.4 311.3 Really Low 06:49:19 - 07:19:19 1471
Toppenish/White Swan 07:03:12 -29.3 Dark Up 23.2 305.1 Low 06:48:12 - 07:18:12 1441
Laughlin/Bullhead City 07:04:22 -41.3 Dark Up 12.6 311.0 Really Low 06:49:22 - 07:19:22 1439
Lake Havasu City 07:04:24 -42.0 Dark Up 12.0 311.2 Really Low 06:49:24 - 07:19:24 1436
Yakima 07:03:12 -29.1 Dark Up 23.4 304.9 Low 06:48:12 - 07:18:12 1430
Ellensburg 07:03:12 -28.7 Dark Up 23.6 304.8 Low 06:48:12 - 07:18:12 1419
Wenatchee 07:03:12 -28.3 Dark Up 23.8 304.7 Low 06:48:12 - 07:18:12 1412
Brewster 07:03:12 -27.7 Dark Up 23.8 304.8 Low 06:48:12 - 07:18:12 1409
Okanogan 07:03:12 -27.5 Dark Up 23.9 304.8 Low 06:48:12 - 07:18:12 1408
Manson/Chelan 07:03:12 -27.9 Dark Up 23.9 304.7 Low 06:48:12 - 07:18:12 1404
Anarchist Mountain Observatory 07:03:12 -26.9 Dark Up 24.1 304.7 Low 06:48:12 - 07:18:12 1403
Oliver 07:03:12 -26.7 Dark Up 24.3 304.5 Low 06:48:12 - 07:18:12 1393
Penticton 07:03:12 -26.4 Dark Up 24.5 304.4 Low 06:48:12 - 07:18:12 1387
Beatty 07:04:19 -39.2 Dark Up 15.1 309.7 Really Low 06:49:19 - 07:19:19 1386
Kelowna 07:03:12 -26.1 Dark Up 24.7 304.3 Low 06:48:12 - 07:18:12 1385
Yuma 07:04:33 -43.7 Dark Up 11.0 311.4 Really Low 06:49:33 - 07:19:33 1384
Summerland 07:03:12 -26.3 Dark Up 24.6 304.3 Low 06:48:12 - 07:18:12 1383
Peachland 07:03:12 -26.2 Dark Up 24.8 304.2 Low 06:48:12 - 07:18:12 1378
Calipatria 07:04:33 -43.1 Dark Up 11.9 310.9 Really Low 06:49:33 - 07:19:33 1359
Kamloops 07:03:12 -25.2 Dark Up 25.6 303.5 Low 06:48:12 - 07:18:12 1347
Hawthorne 07:04:16 -37.3 Dark Up 17.3 308.4 Really Low 06:49:16 - 07:19:16 1338
Bishop 07:04:21 -38.4 Dark Up 16.4 308.8 Really Low 06:49:21 - 07:19:21 1329
Idyllwild 07:04:34 -42.3 Dark Up 13.0 310.3 Really Low 06:49:34 - 07:19:34 1326
Yerington 07:04:15 -36.7 Dark Up 17.9 308.1 Really Low 06:49:15 - 07:19:15 1324
Cedarville 07:04:05 -34.0 Dark Up 20.1 306.9 Low 06:49:05 - 07:19:05 1317
Maupin 07:03:48 -30.3 Dark Up 22.8 305.2 Low 06:48:48 - 07:18:48 1311
Lee Vining 07:04:21 -37.7 Dark Up 17.2 308.3 Really Low 06:49:21 - 07:19:21 1310
The Dalles 07:03:46 -29.9 Dark Up 23.1 305.0 Low 06:48:46 - 07:18:46 1309
Reno 07:04:14 -36.0 Dark Up 18.7 307.6 Really Low 06:49:14 - 07:19:14 1305
Victoria 07:03:12 -26.6 Dark Up 26.1 302.5 Low 06:48:12 - 07:18:12 1302
Carson City 07:04:15 -36.4 Dark Up 18.4 307.7 Really Low 06:49:15 - 07:19:15 1301
Gardnerville 07:04:16 -36.6 Dark Up 18.2 307.8 Really Low 06:49:16 - 07:19:16 1299
Bend 07:03:54 -31.4 Dark Up 22.3 305.5 Low 06:48:54 - 07:18:54 1295
Oregon Observatory 07:03:55 -31.5 Dark Up 22.3 305.4 Low 06:48:55 - 07:18:55 1289
Sisters 07:03:53 -31.1 Dark Up 22.6 305.2 Low 06:48:53 - 07:18:53 1287
Portola 07:04:14 -35.6 Dark Up 19.2 307.2 Really Low 06:49:14 - 07:19:14 1283
Gimple 07:04:13 -35.2 Dark Up 19.7 306.9 Really Low 06:49:13 - 07:19:13 1270
Greenville 07:04:14 -35.2 Dark Up 19.7 306.9 Really Low 06:49:14 - 07:19:14 1267
Quincy 07:04:14 -35.4 Dark Up 19.6 307.0 Really Low 06:49:14 - 07:19:14 1264
Fall River/Burney 07:04:09 -34.2 Dark Up 20.5 306.4 Low 06:49:09 - 07:19:09 1261
Chiloquin 07:04:03 -32.7 Dark Up 21.7 305.7 Low 06:49:03 - 07:19:03 1260
Klamath Falls 07:04:04 -33.0 Dark Up 21.5 305.8 Low 06:49:04 - 07:19:04 1259
Wildwood 07:04:37 -41.6 Dark Up 14.4 309.5 Really Low 06:49:37 - 07:19:37 1254

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 8405, (2029/04/24 07:02UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 18.53  44
34Bet Aur      05:59:31.6 +44:56:51  1.9  8.44  70
52Psi3Aur      06:38:49.2 +39:54:08  5.2  0.60  61
PPM 049235     06:40:21.3 +40:58:11  7.3  0.57  61
PPM 049217     06:39:08.1 +40:28:17 10.0  0.10  62
8405           06:38:36.7 +40:30:02 16.4        62
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:26:40 UT

Marc W. Buie, Southwest Research Institute

RECON