RECON: TNO occultation with 14WS509

Event between 14WS509 and star GA1120:01237799 with event index number of 2683252

Geocentric closest approach at 2028/12/19 05:52:54 UTC

J2000 position of star is 05:31:09.3 +23:15:06
Equinox of date position of star is 05:32:30.0 +23:16:01
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 137 degrees from the moon. Moon is 11% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 42.7 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 535 seconds.
The 1-sigma cross-track error in the shadow position is 2379 km.
The sky-plane scale is 30259.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 13.6 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 14WS509, (2028/12/19 05:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:35.2 +16:33:55  0.8 14.62 124
Alnath         05:28:07.5 +28:37:46  1.6  5.46 136
114 Tau        05:29:22.6 +21:57:33  4.7  1.55 136
PPM 094385     05:29:41.0 +23:18:53  8.4  0.74 136
PPM 094436     05:32:49.9 +23:13:45  9.5  0.05 137
PPM 094438     05:32:51.0 +23:14:14 10.9  0.04 137
14WS509        05:32:54.9 +23:16:17 14.8       138
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 1.7 sigma about the mid-time.
The median site spacing is 28.7 km RECON observability=1.0 and success probability=9.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:54:01 -53.6 Dark Down 55.8 133.6 Up 05:39:01 - 06:09:01 5308
Sleaford 05:53:23 -58.6 Dark Down 59.7 157.7 Up 05:38:23 - 06:08:23 5275
Kelowna 05:54:00 -54.6 Dark Down 56.8 134.0 Up 05:39:00 - 06:09:00 5218
Peachland 05:54:01 -54.5 Dark Down 56.7 133.4 Up 05:39:01 - 06:09:01 5212
Summerland 05:54:01 -54.6 Dark Down 56.9 133.4 Up 05:39:01 - 06:09:01 5196
Penticton 05:54:01 -54.7 Dark Down 57.0 133.5 Up 05:39:01 - 06:09:01 5188
Oliver 05:54:01 -54.9 Dark Down 57.2 133.1 Up 05:39:01 - 06:09:01 5155
Victoria 05:54:12 -53.2 Dark Down 55.7 127.0 Up 05:39:12 - 06:09:12 5153
Anarchist Mountain Observatory 05:54:01 -55.1 Dark Down 57.4 133.2 Up 05:39:01 - 06:09:01 5136
Tonasket 05:54:02 -55.3 Dark Down 57.6 132.7 Up 05:39:02 - 06:09:02 5107
Okanogan 05:54:03 -55.4 Dark Down 57.8 132.1 Up 05:39:03 - 06:09:03 5077
Brewster 05:54:04 -55.4 Dark Down 57.9 131.5 Up 05:39:04 - 06:09:04 5054
Manson/Chelan 05:54:05 -55.3 Dark Down 57.8 130.7 Up 05:39:05 - 06:09:05 5040
Wenatchee 05:54:06 -55.5 Dark Down 58.0 129.9 Up 05:39:06 - 06:09:06 4997
Ellensburg 05:54:07 -55.6 Dark Down 58.2 129.1 Up 05:39:07 - 06:09:07 4960
Yakima 05:54:08 -55.8 Dark Down 58.4 128.5 Up 05:39:08 - 06:09:08 4921
Toppenish/White Swan 05:54:08 -56.0 Dark Down 58.7 128.5 Up 05:39:08 - 06:09:08 4897
Goldendale 05:54:10 -56.1 Dark Down 58.8 127.2 Up 05:39:10 - 06:09:10 4850
PNWRO 05:54:05 -57.1 Dark Down 59.7 130.2 Up 05:39:05 - 06:09:05 4837
The Dalles 05:54:11 -56.0 Dark Down 58.7 126.4 Up 05:39:11 - 06:09:11 4834
Maupin 05:54:12 -56.2 Dark Down 59.0 126.0 Up 05:39:12 - 06:09:12 4791
Sisters 05:54:15 -56.4 Dark Down 59.2 124.1 Up 05:39:15 - 06:09:15 4713
Bend 05:54:14 -56.6 Dark Down 59.5 124.1 Up 05:39:14 - 06:09:14 4685
Oregon Observatory 05:54:15 -56.6 Dark Down 59.5 123.7 Up 05:39:15 - 06:09:15 4670
North Lake 05:54:14 -57.3 Dark Down 60.2 123.5 Up 05:39:14 - 06:09:14 4597
Chiloquin 05:54:18 -57.0 Dark Down 60.0 121.3 Up 05:39:18 - 06:09:18 4546
Klamath Falls 05:54:18 -57.2 Dark Down 60.2 120.9 Up 05:39:18 - 06:09:18 4511
Lakeview 05:54:14 -58.1 Dark Down 61.1 122.7 Up 05:39:14 - 06:09:14 4482
Cedarville 05:54:15 -58.5 Dark Down 61.6 122.0 Up 05:39:15 - 06:09:15 4412
Fall River/Burney 05:54:18 -57.9 Dark Down 61.1 119.6 Up 05:39:18 - 06:09:18 4385
Susanville 05:54:18 -58.7 Dark Down 61.9 119.6 Up 05:39:18 - 06:09:18 4308
Greenville 05:54:19 -58.6 Dark Down 61.8 118.7 Up 05:39:19 - 06:09:19 4285
Gimple 05:54:18 -58.6 Dark Down 61.9 118.8 Up 05:39:18 - 06:09:18 4283
Quincy 05:54:19 -58.6 Dark Down 61.9 118.4 Up 05:39:19 - 06:09:19 4264
Portola 05:54:18 -59.0 Dark Down 62.3 118.8 Up 05:39:18 - 06:09:18 4243
Reno 05:54:16 -59.6 Dark Down 62.9 119.2 Up 05:39:16 - 06:09:16 4204
Carson City 05:54:17 -59.7 Dark Down 63.0 118.6 Up 05:39:17 - 06:09:17 4167
Gardnerville 05:54:17 -59.9 Dark Down 63.2 118.3 Up 05:39:17 - 06:09:17 4141
Yerington 05:54:15 -60.3 Dark Down 63.6 119.2 Up 05:39:15 - 06:09:15 4135
Hawthorne 05:54:14 -60.8 Dark Down 64.2 119.1 Up 05:39:14 - 06:09:14 4078
Dunrhomin 05:53:30 -68.4 Dark Down 70.5 147.5 Up 05:38:30 - 06:08:30 4075
CU-SBO 05:53:31 -68.5 Dark Down 70.7 146.9 Up 05:38:31 - 06:08:31 4050
Lee Vining 05:54:16 -60.7 Dark Down 64.1 117.4 Up 05:39:16 - 06:09:16 4028
Tonopah 05:54:11 -62.0 Dark Down 65.3 120.2 Up 05:39:11 - 06:09:11 4006
Bishop 05:54:15 -61.4 Dark Down 64.9 117.3 Up 05:39:15 - 06:09:15 3953
Beatty 05:54:10 -62.8 Dark Down 66.2 118.7 Up 05:39:10 - 06:09:10 3877
Indian Springs 05:54:07 -63.7 Dark Down 67.1 119.6 Up 05:39:07 - 06:09:07 3825
Henderson 05:54:05 -64.4 Dark Down 67.9 119.6 Up 05:39:05 - 06:09:05 3757
Patrick 05:54:02 -65.5 Dark Down 69.0 120.0 Up 05:39:02 - 06:09:02 3673
Laughlin/Bullhead City 05:54:05 -65.1 Dark Down 68.6 118.3 Up 05:39:05 - 06:09:05 3658
Kingman/Dolan Springs 05:54:03 -65.4 Dark Down 68.9 119.2 Up 05:39:03 - 06:09:03 3653
Mohave Valley 05:54:05 -65.2 Dark Down 68.7 117.7 Up 05:39:05 - 06:09:05 3629
Wildwood 05:54:20 -62.3 Dark Down 66.1 110.5 Up 05:39:20 - 06:09:20 3613
Lake Havasu City 05:54:05 -65.5 Dark Down 69.1 117.1 Up 05:39:05 - 06:09:05 3583
Parker 05:54:05 -65.6 Dark Down 69.3 116.4 Up 05:39:05 - 06:09:05 3545
Idyllwild 05:54:14 -63.9 Dark Down 67.6 112.0 Up 05:39:14 - 06:09:14 3542
George/Scottsdale 05:53:57 -67.7 Dark Down 71.2 119.3 Up 05:38:57 - 06:08:57 3462
Calipatria 05:54:10 -65.0 Dark Down 68.8 112.2 Up 05:39:10 - 06:09:10 3457
Yuma 05:54:08 -65.8 Dark Down 69.6 112.4 Up 05:39:08 - 06:09:08 3395

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 14WS509, (2028/12/19 05:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 14.62 124
Alnath         05:26:17.6 +28:36:23  1.6  5.46 136
114 Tau        05:27:38.1 +21:56:13  4.7  1.55 136
PPM 094385     05:27:55.4 +23:17:34  8.4  0.74 136
PPM 094436     05:31:04.4 +23:12:34  9.5  0.05 137
PPM 094438     05:31:05.4 +23:13:03 10.9  0.04 137
14WS509        05:31:09.3 +23:15:06 14.8       137
Positions are for J2000

Event circumstances last updated at 2022/02/22 01:28:33 UT

Marc W. Buie, Southwest Research Institute

RECON