RECON: TNO occultation with 427507

Event between (427507) 02DH5 and star GA0900:04973435 with event index number of 2433559

Geocentric closest approach at 2024/05/28 08:50:07 UTC

J2000 position of star is 17:02:58.3 +00:33:42
Equinox of date position of star is 17:04:12.2 +00:31:44
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 58 degrees from the moon. Moon is 75% illuminated.
Apparent brightness V=24.2

[RECON map]
Object is 24.8 AU from the Sun and 23.9 AU from the Earth.
Apparent velocity is 23.9 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 493 seconds.
The 1-sigma cross-track error in the shadow position is 2651 km.
The sky-plane scale is 17300.4 km/arcsec.

The object has an absolute magnitude Hv=10.2
Diameter=57.5 km assuming a 5% albedo -- 2.3 sec chord
Diameter=23.5 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 427507, (2024/05/28 08:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.5 -26:29:02  0.9 28.18  57
60Bet Oph      17:44:40.8 +04:33:32  2.8 10.88  52
PPM 179990     17:06:47.8 -00:55:26  5.4  1.59  57
PPM 179983     17:04:56.5 -00:10:43  7.3  0.73  58
PPM 163420     17:03:17.5 +00:31:37  9.8  0.23  59
427507         17:04:13.1 +00:31:43 14.6        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 1.8 sigma about the mid-time.
The median site spacing is 25.3 km RECON observability=1.0 and success probability=5.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:49:53 -12.6 AT Up 36.5 201.6 Up 08:34:53 - 09:04:53 6182
Kamloops 08:50:31 -16.9 AT Up 39.8 183.8 Up 08:35:31 - 09:05:31 5931
Kelowna 08:50:28 -17.5 AT Up 40.6 185.0 Up 08:35:28 - 09:05:28 5884
Peachland 08:50:29 -17.7 AT Up 40.7 184.6 Up 08:35:29 - 09:05:29 5873
Summerland 08:50:29 -17.8 AT Up 40.9 184.8 Up 08:35:29 - 09:05:29 5863
Penticton 08:50:28 -17.9 AT Up 40.9 184.9 Up 08:35:28 - 09:05:28 5860
Oliver 08:50:28 -18.2 Dark Up 41.3 184.9 Up 08:35:28 - 09:05:28 5835
Anarchist Mountain Observatory 08:50:28 -18.3 Dark Up 41.4 185.2 Up 08:35:28 - 09:05:28 5825
Okanogan 08:50:27 -19.0 Dark Up 42.1 185.0 Up 08:35:27 - 09:05:27 5775
Brewster 08:50:28 -19.3 Dark Up 42.4 184.7 Up 08:35:28 - 09:05:28 5753
Victoria 08:50:39 -19.4 Dark Up 42.0 179.9 Up 08:35:39 - 09:05:39 5742
Manson/Chelan 08:50:29 -19.6 Dark Up 42.6 184.2 Up 08:35:29 - 09:05:29 5733
Wenatchee 08:50:29 -20.0 Dark Up 43.1 184.0 Up 08:35:29 - 09:05:29 5696
Ellensburg 08:50:29 -20.5 Dark Up 43.5 183.8 Up 08:35:29 - 09:05:29 5663
Yakima 08:50:29 -20.9 Dark Up 43.9 183.8 Up 08:35:29 - 09:05:29 5632
Toppenish/White Swan 08:50:29 -21.1 Dark Up 44.1 184.0 Up 08:35:29 - 09:05:29 5617
PNWRO 08:50:24 -21.2 Dark Up 44.4 186.1 Up 08:35:24 - 09:05:24 5608
The Dalles 08:50:30 -21.9 Dark Up 44.9 182.9 Up 08:35:30 - 09:05:30 5548
Maupin 08:50:30 -22.3 Dark Up 45.3 183.1 Up 08:35:30 - 09:05:30 5517
Sisters 08:50:31 -23.3 Dark Up 46.2 182.5 Up 08:35:31 - 09:05:31 5443
Bend 08:50:30 -23.5 Dark Up 46.5 182.8 Up 08:35:30 - 09:05:30 5427
Oregon Observatory 08:50:30 -23.7 Dark Up 46.6 182.7 Up 08:35:30 - 09:05:30 5412
Dunrhomin 08:49:33 -22.9 Dark Up 47.1 206.8 Up 08:34:33 - 09:04:33 5329
Nikitin 08:49:33 -23.1 Dark Up 47.3 206.9 Up 08:34:33 - 09:04:33 5314
CU-SBO 08:49:33 -23.2 Dark Up 47.4 206.8 Up 08:34:33 - 09:04:33 5308
Chiloquin 08:50:31 -25.0 Dark Up 48.0 182.1 Up 08:35:31 - 09:05:31 5301
Klamath Falls 08:50:30 -25.3 Dark Up 48.3 182.2 Up 08:35:30 - 09:05:30 5274
Cedarville 08:50:25 -25.7 Dark Up 48.9 184.7 Up 08:35:25 - 09:05:25 5238
Fall River/Burney 08:50:29 -26.4 Dark Up 49.5 182.9 Up 08:35:29 - 09:05:29 5181
Gimple 08:50:26 -27.2 Dark Up 50.4 183.7 Up 08:35:26 - 09:05:26 5112
Greenville 08:50:26 -27.2 Dark Up 50.4 183.6 Up 08:35:26 - 09:05:26 5112
Quincy 08:50:26 -27.4 Dark Up 50.6 183.6 Up 08:35:26 - 09:05:26 5094
Portola 08:50:24 -27.5 Dark Up 50.7 184.4 Up 08:35:24 - 09:05:24 5090
Reno 08:50:22 -27.6 Dark Up 50.9 185.4 Up 08:35:22 - 09:05:22 5077
Carson City 08:50:21 -28.0 Dark Up 51.2 185.5 Up 08:35:21 - 09:05:21 5047
Yerington 08:50:20 -28.0 Dark Up 51.4 186.5 Up 08:35:20 - 09:05:20 5038
Gardnerville 08:50:21 -28.2 Dark Up 51.5 185.6 Up 08:35:21 - 09:05:21 5026
Hawthorne 08:50:17 -28.4 Dark Up 51.8 187.4 Up 08:35:17 - 09:05:17 5006
Lee Vining 08:50:19 -29.0 Dark Up 52.4 186.7 Up 08:35:19 - 09:05:19 4951
Bishop 08:50:15 -29.4 Dark Up 52.9 188.0 Up 08:35:15 - 09:05:15 4909
Beatty 08:50:09 -29.5 Dark Up 53.2 190.8 Up 08:35:09 - 09:05:09 4891
Patrick 08:49:57 -30.2 Dark Up 54.1 195.9 Up 08:34:57 - 09:04:57 4801
Laughlin/Bullhead City 08:50:00 -30.6 Dark Up 54.5 194.9 Up 08:35:00 - 09:05:00 4769
Lake Havasu City 08:49:58 -31.1 Dark Up 55.1 195.5 Up 08:34:58 - 09:04:58 4712
George/Scottsdale 08:49:49 -31.1 Dark Up 55.2 200.0 Up 08:34:49 - 09:04:49 4678
Wildwood 08:50:14 -32.6 Dark Up 56.2 188.3 Up 08:35:14 - 09:05:14 4615
Idyllwild 08:50:06 -32.5 Dark Up 56.3 191.7 Up 08:35:06 - 09:05:06 4610
Calipatria 08:50:01 -32.8 Dark Up 56.7 194.0 Up 08:35:01 - 09:05:01 4571
Yuma 08:49:58 -32.9 Dark Up 56.9 195.7 Up 08:34:58 - 09:04:58 4545

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 427507, (2024/05/28 08:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 28.18  57
60Bet Oph      17:43:28.3 +04:34:06  2.8 10.88  52
PPM 179990     17:05:32.2 -00:53:32  5.4  1.59  57
PPM 179983     17:03:41.4 -00:08:45  7.3  0.73  58
PPM 163420     17:02:02.7 +00:33:38  9.8  0.23  59
427507         17:02:58.3 +00:33:42 14.6        58
Positions are for J2000

Event circumstances last updated at 2024/02/12 04:24:28 UT

Marc W. Buie, Southwest Research Institute

RECON