RECON: TNO occultation with 20YR3

Event between 20YR3 and star GA1160:00687119 with event index number of 2179479

Geocentric closest approach at 2024/11/26 03:28:17 UTC

J2000 position of star is 04:09:16.0 +27:01:24
Equinox of date position of star is 04:10:37.9 +27:04:49
Stellar brightness G=13.4, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 122 degrees from the moon. Moon is 22% illuminated.
TNO apparent brightness V=21.4

[RECON map]
TNO is 16.5 AU from the Sun and 15.6 AU from the Earth.
The TNO is moving 40.3 km/sec on the sky relative to the star, or, 12.9 arcsec/hr.
The 1-sigma error in the time of the event is 93 seconds.
The 1-sigma cross-track error in the shadow position is 3601 km.
The sky-plane scale is 11280.3 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.9 km assuming a 5% albedo -- 2.1 sec chord
Diameter=34.3 km assuming a 30% albedo -- 0.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 20YR3, (2024/11/26 03:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.1 +16:33:27  0.8 12.19 118
44Zet Per      03:55:42.2 +31:57:20  2.8  5.87 124
44 Tau         04:12:21.2 +26:32:38  5.4  0.65 122
PPM 093246     04:07:35.5 +26:16:38  7.9  1.08 123
PPM 093287     04:10:39.1 +27:10:49  9.3  0.10 122
20YR3          04:10:47.7 +27:05:14 13.4       122
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 5.0 sigma about the mid-time.
The median site spacing is 20.2 km RECON observability=1.0 and success probability=7.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:29:26 -31.9 Dark Down 36.3 90.4 Up 03:21:14 - 03:37:39 5788
Victoria 03:29:26 -30.1 Dark Down 34.3 86.6 Up 03:21:14 - 03:37:39 5773
Peachland 03:29:26 -32.4 Dark Down 36.7 90.2 Up 03:21:13 - 03:37:38 5711
Kelowna 03:29:26 -32.6 Dark Down 36.9 90.5 Up 03:21:14 - 03:37:39 5707
Summerland 03:29:26 -32.5 Dark Down 36.8 90.2 Up 03:21:14 - 03:37:39 5698
Penticton 03:29:26 -32.6 Dark Down 36.8 90.2 Up 03:21:14 - 03:37:39 5690
Oliver 03:29:26 -32.6 Dark Down 36.8 89.9 Up 03:21:14 - 03:37:39 5669
Anarchist Mountain Observatory 03:29:26 -32.7 Dark Down 37.0 89.9 Up 03:21:14 - 03:37:39 5652
Tonasket 03:29:26 -32.7 Dark Down 36.9 89.7 Up 03:21:14 - 03:37:39 5635
Okanogan 03:29:26 -32.6 Dark Down 36.8 89.3 Up 03:21:14 - 03:37:39 5621
Manson/Chelan 03:29:26 -32.3 Dark Down 36.4 88.5 Up 03:21:14 - 03:37:39 5613
Brewster 03:29:26 -32.5 Dark Down 36.7 88.9 Up 03:21:14 - 03:37:39 5612
Wenatchee 03:29:26 -32.2 Dark Down 36.3 88.0 Up 03:21:14 - 03:37:39 5592
Ellensburg 03:29:26 -32.1 Dark Down 36.1 87.6 Up 03:21:14 - 03:37:39 5576
Yakima 03:29:26 -32.1 Dark Down 36.1 87.3 Up 03:21:14 - 03:37:39 5553
Toppenish/White Swan 03:29:26 -32.2 Dark Down 36.2 87.2 Up 03:21:14 - 03:37:39 5533
The Dalles 03:29:26 -31.7 Dark Down 35.6 86.1 Up 03:21:14 - 03:37:39 5520
Goldendale 03:29:26 -31.9 Dark Down 35.9 86.5 Up 03:21:14 - 03:37:39 5518
Maupin 03:29:26 -31.8 Dark Down 35.7 85.9 Up 03:21:14 - 03:37:39 5491
PNWRO 03:29:26 -33.3 Dark Down 37.2 88.0 Up 03:21:14 - 03:37:39 5451
Sisters 03:29:42 -31.5 Dark Down 35.3 85.0 Up 03:21:29 - 03:37:54 5426
Bend 03:29:42 -31.7 Dark Down 35.4 85.0 Up 03:21:30 - 03:37:55 5399
Oregon Observatory 03:29:42 -31.6 Dark Down 35.3 84.8 Up 03:21:30 - 03:37:55 5393
Sleaford 03:29:13 -40.4 Dark Down 45.0 103.8 Up 03:21:00 - 03:37:25 5385
North Lake 03:29:44 -32.0 Dark Down 35.7 84.7 Up 03:21:31 - 03:37:56 5327
Chiloquin 03:29:46 -31.3 Dark Down 34.9 83.6 Up 03:21:33 - 03:37:58 5319
Klamath Falls 03:29:46 -31.4 Dark Down 34.9 83.4 Up 03:21:34 - 03:37:59 5292
Lakeview 03:29:45 -32.4 Dark Down 36.0 84.3 Up 03:21:33 - 03:37:58 5231
Fall River/Burney 03:29:48 -31.6 Dark Down 35.1 82.8 Up 03:21:36 - 03:38:01 5193
Cedarville 03:29:46 -32.5 Dark Down 36.0 83.9 Up 03:21:34 - 03:37:59 5177
Susanville 03:29:49 -32.2 Dark Down 35.6 82.8 Up 03:21:36 - 03:38:01 5116
Greenville 03:29:50 -31.9 Dark Down 35.3 82.5 Up 03:21:38 - 03:38:03 5109
Gimple 03:29:50 -32.0 Dark Down 35.4 82.5 Up 03:21:38 - 03:38:03 5105
Quincy 03:29:50 -31.9 Dark Down 35.3 82.3 Up 03:21:38 - 03:38:03 5094
Portola 03:29:50 -32.3 Dark Down 35.6 82.5 Up 03:21:38 - 03:38:03 5065
Reno 03:29:51 -32.8 Dark Down 36.1 82.7 Up 03:21:38 - 03:38:03 5017
Carson City 03:29:51 -32.8 Dark Down 36.1 82.4 Up 03:21:39 - 03:38:04 4990
Gardnerville 03:29:52 -32.8 Dark Down 36.1 82.3 Up 03:21:39 - 03:38:04 4969
Yerington 03:29:51 -33.3 Dark Down 36.5 82.7 Up 03:21:39 - 03:38:04 4948
Hawthorne 03:29:52 -33.7 Dark Down 36.9 82.6 Up 03:21:39 - 03:38:04 4890
Lee Vining 03:29:53 -33.3 Dark Down 36.4 81.9 Up 03:21:41 - 03:38:06 4869
Tonopah 03:29:51 -34.8 Dark Down 37.9 83.0 Up 03:21:39 - 03:38:04 4793
Bishop 03:29:54 -33.9 Dark Down 36.9 81.9 Up 03:21:41 - 03:38:06 4791
Beatty 03:29:53 -35.2 Dark Down 38.1 82.4 Up 03:21:41 - 03:38:06 4683
Indian Springs 03:29:53 -36.0 Dark Down 39.0 82.7 Up 03:21:40 - 03:38:05 4609
Wildwood 03:30:00 -33.6 Dark Down 36.2 79.4 Up 03:21:48 - 03:38:13 4542
Henderson 03:29:54 -36.6 Dark Down 39.5 82.6 Up 03:21:41 - 03:38:06 4535
Dunrhomin 03:29:26 -43.9 Dark Down 47.3 92.2 Up 03:21:14 - 03:37:39 4474
CU-SBO 03:29:26 -43.8 Dark Down 47.2 91.9 Up 03:21:14 - 03:37:39 4460
Laughlin/Bullhead City 03:29:55 -36.9 Dark Down 39.7 82.1 Up 03:21:42 - 03:38:07 4446
Patrick 03:29:54 -37.5 Dark Down 40.3 82.6 Up 03:21:41 - 03:38:06 4435
Idyllwild 03:29:59 -35.1 Dark Down 37.7 80.0 Up 03:21:47 - 03:38:12 4427
Kingman/Dolan Springs 03:29:54 -37.3 Dark Down 40.1 82.4 Up 03:21:42 - 03:38:07 4425
Mohave Valley 03:29:55 -36.9 Dark Down 39.6 81.9 Up 03:21:43 - 03:38:08 4424
Lake Havasu City 03:29:56 -37.1 Dark Down 39.8 81.7 Up 03:21:43 - 03:38:08 4380
Parker 03:29:56 -37.1 Dark Down 39.8 81.4 Up 03:21:44 - 03:38:09 4349
Calipatria 03:29:59 -36.1 Dark Down 38.6 80.0 Up 03:21:47 - 03:38:12 4322
Yuma 03:29:59 -36.8 Dark Down 39.3 80.1 Up 03:21:47 - 03:38:12 4245
George/Scottsdale 03:29:55 -39.1 Dark Down 41.7 82.1 Up 03:21:42 - 03:38:07 4203

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 20YR3, (2024/11/26 03:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 12.19 118
44Zet Per      03:54:07.9 +31:53:01  2.8  5.87 124
44 Tau         04:10:49.8 +26:28:51  5.4  0.65 122
PPM 093246     04:06:04.5 +26:12:42  7.9  1.08 123
PPM 093287     04:09:07.4 +27:06:58  9.3  0.10 122
20YR3          04:09:16.0 +27:01:24 13.4       122
Positions are for J2000

Event circumstances last updated at 2022/03/30 23:19:01 UT

Marc W. Buie, Southwest Research Institute

RECON