RECON: TNO occultation with 278361

Event between (278361) 07JJ43 and star GA0640:24766638 with event index number of 2752317

Geocentric closest approach at 2029/05/06 11:22:33 UTC

J2000 position of star is 17:58:52.5 -24:15:30
Equinox of date position of star is 18:00:21.4 -24:15:30
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 40% illuminated.
Apparent brightness V=20.6

[RECON map]
Object is 40.4 AU from the Sun and 39.7 AU from the Earth.
Apparent velocity is 16.0 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 753 seconds.
The 1-sigma cross-track error in the shadow position is 4133 km.
The sky-plane scale is 28804.5 km/arcsec.

The object has an absolute magnitude Hv=4.5
Diameter=758.6 km assuming a 5% albedo -- 47.5 sec chord
Diameter=309.7 km assuming a 30% albedo -- 19.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 278361, (2029/05/06 10:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:12.7 -26:29:40  0.9 20.30  79
Nunki          18:57:05.0 -26:15:27  2.0 12.90  46
4 Sgr          18:01:35.1 -23:48:57  4.8  0.49  58
PPM 267646     18:01:59.6 -24:17:02  6.8  0.30  58
PPM 267593     18:00:19.9 -24:25:03  9.9  0.18  58
278361         18:00:40.4 -24:15:30 16.4        58
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 1.2 sigma about the mid-time.
The median site spacing is 21.3 km RECON observability=0.4 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)
Sleaford 11:21:31 -1.1 CT Up 11.8 198.0 Really Low 11:06:31 - 11:36:31 428
Kamloops 11:22:30 -9.1 NT Up 14.9 184.9 Really Low 11:07:30 - 11:37:30 427
Kelowna 11:22:25 -9.2 NT Up 15.7 185.7 Really Low 11:07:25 - 11:37:25 404
Peachland 11:22:27 -9.5 NT Up 15.8 185.4 Really Low 11:07:27 - 11:37:27 400
Summerland 11:22:26 -9.5 NT Up 16.0 185.5 Really Low 11:07:26 - 11:37:26 396
Penticton 11:22:26 -9.5 NT Up 16.0 185.6 Really Low 11:07:26 - 11:37:26 394
Oliver 11:22:26 -9.7 NT Up 16.4 185.6 Really Low 11:07:26 - 11:37:26 383
Anarchist Mountain Observatory 11:22:25 -9.7 NT Up 16.5 185.8 Really Low 11:07:25 - 11:37:25 378
Okanogan 11:22:25 -10.3 NT Up 17.2 185.6 Really Low 11:07:25 - 11:37:25 356
Victoria 11:22:43 -12.0 AT Up 17.2 182.0 Really Low 11:07:43 - 11:37:43 356
Brewster 11:22:26 -10.5 NT Up 17.5 185.5 Really Low 11:07:26 - 11:37:26 347
Manson/Chelan 11:22:27 -10.9 NT Up 17.7 185.1 Really Low 11:07:27 - 11:37:27 340
Wenatchee 11:22:28 -11.3 NT Up 18.2 185.0 Really Low 11:07:28 - 11:37:28 324
Ellensburg 11:22:29 -11.6 NT Up 18.6 184.8 Really Low 11:07:29 - 11:37:29 309
Yakima 11:22:29 -11.9 NT Up 19.0 184.8 Really Low 11:07:29 - 11:37:29 294
Toppenish/White Swan 11:22:28 -12.0 NT Up 19.2 184.9 Really Low 11:07:28 - 11:37:28 286
PNWRO 11:22:21 -11.4 NT Up 19.5 186.4 Really Low 11:07:21 - 11:37:21 274
The Dalles 11:22:31 -12.9 AT Up 20.0 184.2 Low 11:07:31 - 11:37:31 256
Maupin 11:22:31 -13.1 AT Up 20.4 184.3 Low 11:07:31 - 11:37:31 241
Sisters 11:22:33 -13.9 AT Up 21.4 183.9 Low 11:07:33 - 11:37:33 206
Bend 11:22:31 -14.0 AT Up 21.6 184.1 Low 11:07:31 - 11:37:31 196
Oregon Observatory 11:22:32 -14.1 AT Up 21.8 184.0 Low 11:07:32 - 11:37:32 189
Chiloquin 11:22:33 -15.2 AT Up 23.1 183.6 Low 11:07:33 - 11:37:33 133
Klamath Falls 11:22:33 -15.4 AT Up 23.4 183.7 Low 11:07:33 - 11:37:33 118
Cedarville 11:22:24 -15.0 AT Up 24.0 185.3 Low 11:07:24 - 11:37:24 89
Fall River/Burney 11:22:30 -16.0 AT Up 24.6 184.1 Low 11:07:30 - 11:37:30 65
Gimple 11:22:27 -16.2 AT Up 25.5 184.7 Low 11:07:27 - 11:37:27 23
Greenville 11:22:28 -16.3 AT Up 25.5 184.6 Low 11:07:28 - 11:37:28 23
Quincy 11:22:28 -16.4 AT Up 25.7 184.6 Low 11:07:28 - 11:37:28 13
Portola 11:22:25 -16.2 AT Up 25.8 185.1 Low 11:07:25 - 11:37:25 8
Reno 11:22:22 -16.0 AT Up 26.0 185.7 Low 11:07:22 - 11:37:22 -4
Carson City 11:22:21 -16.2 AT Up 26.3 185.8 Low 11:07:21 - 11:37:21 -22
Dunrhomin 11:21:08 -6.4 NT Up 22.9 199.8 Low 11:06:08 - 11:36:08 -23
Yerington 11:22:18 -16.0 AT Up 26.5 186.4 Low 11:07:18 - 11:37:18 -31
Nikitin 11:21:07 -6.5 NT Up 23.0 199.8 Low 11:06:07 - 11:36:07 -31
Gardnerville 11:22:21 -16.3 AT Up 26.6 185.8 Low 11:07:21 - 11:37:21 -34
CU-SBO 11:21:08 -6.6 NT Up 23.1 199.7 Low 11:06:08 - 11:36:08 -34
Hawthorne 11:22:15 -15.9 AT Up 26.9 187.0 Low 11:07:15 - 11:37:15 -54
Lee Vining 11:22:17 -16.6 AT Up 27.5 186.5 Low 11:07:17 - 11:37:17 -83
Bishop 11:22:13 -16.5 AT Up 28.0 187.3 Low 11:07:13 - 11:37:13 -114
Beatty 11:22:04 -15.7 AT Up 28.3 189.0 Low 11:07:04 - 11:37:04 -140
Patrick 11:21:47 -14.7 AT Up 29.4 192.0 Low 11:06:47 - 11:36:47 -227
Laughlin/Bullhead City 11:21:50 -15.3 AT Up 29.7 191.3 Low 11:06:50 - 11:36:50 -240
Lake Havasu City 11:21:48 -15.5 AT Up 30.3 191.6 Up 11:06:48 - 11:36:48 -279
Wildwood 11:22:12 -18.6 Dark Up 31.3 187.3 Up 11:07:12 - 11:37:12 -296
Idyllwild 11:22:01 -17.5 AT Up 31.4 189.3 Up 11:07:01 - 11:37:01 -317
George/Scottsdale 11:21:34 -14.3 AT Up 30.6 194.2 Up 11:06:34 - 11:36:34 -332
Calipatria 11:21:54 -17.1 AT Up 31.9 190.6 Up 11:06:54 - 11:36:54 -356
Yuma 11:21:49 -16.7 AT Up 32.1 191.5 Up 11:06:49 - 11:36:49 -384

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 278361, (2029/05/06 10:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.30  79
Nunki          18:55:15.9 -26:17:49  2.0 12.90  46
4 Sgr          17:59:47.6 -23:48:59  4.8  0.49  58
PPM 267646     18:00:11.6 -24:17:05  6.8  0.30  58
PPM 267593     17:58:31.9 -24:25:02  9.9  0.18  58
278361         17:58:52.5 -24:15:30 16.4        58
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:29:45 UT

Marc W. Buie, Southwest Research Institute

RECON