RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star GA0940:02383766 with event index number of 2249991

Geocentric closest approach at 2024/11/20 06:54:34 UTC

J2000 position of star is 07:05:40.0 +05:50:34
Equinox of date position of star is 07:06:51.3 +05:48:27
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 23 degrees from the moon. Moon is 77% illuminated.
TNO apparent brightness V=20.4

[RECON map]
TNO is 31.4 AU from the Sun and 30.8 AU from the Earth.
The TNO is moving 15.8 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 206 seconds.
The 1-sigma cross-track error in the shadow position is 1214 km.
The sky-plane scale is 22306.7 km/arcsec.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 33.3 sec chord
Diameter=214.3 km assuming a 30% albedo -- 13.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 55638, (2024/11/20 06:55UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:31.2 +07:24:35  0.4 17.57  34
Alhena         06:39:09.0 +16:22:33  1.9 12.58  21
PPM 151776     07:03:14.9 +05:31:11  6.4  0.97  24
PPM 151918     07:07:18.4 +05:51:00  8.3  0.09  23
55638          07:06:59.8 +05:48:12 16.0        23
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 4.4 sigma about the mid-time.
The median site spacing is 16.9 km RECON observability=1.0 and success probability=21.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:56:43 -57.6 Dark Up 21.5 108.0 Low 06:41:43 - 07:11:43 -684
Kelowna 06:56:46 -58.5 Dark Up 22.3 108.4 Low 06:41:46 - 07:11:46 -738
Peachland 06:56:48 -58.6 Dark Up 22.2 108.1 Low 06:41:48 - 07:11:48 -739
Victoria 06:57:01 -58.7 Dark Up 20.3 104.7 Low 06:42:01 - 07:12:01 -743
Summerland 06:56:48 -58.7 Dark Up 22.3 108.2 Low 06:41:48 - 07:11:48 -748
Penticton 06:56:49 -58.8 Dark Up 22.4 108.2 Low 06:41:49 - 07:11:49 -753
Oliver 06:56:51 -59.2 Dark Up 22.5 108.1 Low 06:41:51 - 07:11:51 -771
Anarchist Mountain Observatory 06:56:51 -59.4 Dark Up 22.7 108.2 Low 06:41:51 - 07:11:51 -782
Tonasket 06:56:53 -59.6 Dark Up 22.7 108.0 Low 06:41:53 - 07:11:53 -798
Okanogan 06:56:56 -59.9 Dark Up 22.7 107.8 Low 06:41:56 - 07:11:56 -813
Brewster 06:56:57 -60.1 Dark Up 22.7 107.5 Low 06:41:57 - 07:11:57 -823
Manson/Chelan 06:57:00 -60.2 Dark Up 22.5 107.1 Low 06:42:00 - 07:12:00 -828
Wenatchee 06:57:03 -60.6 Dark Up 22.6 106.8 Low 06:42:03 - 07:12:03 -851
Ellensburg 06:57:06 -60.9 Dark Up 22.6 106.5 Low 06:42:06 - 07:12:06 -869
Yakima 06:57:08 -61.3 Dark Up 22.7 106.3 Low 06:42:08 - 07:12:08 -891
Toppenish/White Swan 06:57:08 -61.5 Dark Up 22.8 106.4 Low 06:42:08 - 07:12:08 -906
Sleaford 06:55:44 -57.7 Dark Up 29.0 121.4 Low 06:40:44 - 07:10:44 -915
Goldendale 06:57:13 -61.9 Dark Up 22.7 105.8 Low 06:42:13 - 07:12:13 -929
The Dalles 06:57:14 -62.0 Dark Up 22.5 105.4 Low 06:42:14 - 07:12:14 -936
PNWRO 06:57:08 -62.3 Dark Up 23.9 107.4 Low 06:42:08 - 07:12:08 -952
Maupin 06:57:17 -62.4 Dark Up 22.7 105.4 Low 06:42:17 - 07:12:17 -961
Sisters 06:57:23 -63.0 Dark Up 22.6 104.6 Low 06:42:23 - 07:12:23 -1003
Bend 06:57:24 -63.3 Dark Up 22.9 104.7 Low 06:42:24 - 07:12:24 -1021
Oregon Observatory 06:57:25 -63.4 Dark Up 22.8 104.6 Low 06:42:25 - 07:12:25 -1029
North Lake 06:57:28 -64.2 Dark Up 23.4 104.7 Low 06:42:28 - 07:12:28 -1076
Chiloquin 06:57:33 -64.4 Dark Up 22.9 103.7 Low 06:42:33 - 07:12:33 -1100
Klamath Falls 06:57:35 -64.7 Dark Up 23.0 103.7 Low 06:42:35 - 07:12:35 -1123
Lakeview 06:57:32 -65.3 Dark Up 24.1 104.7 Low 06:42:32 - 07:12:32 -1151
Cedarville 06:57:36 -65.9 Dark Up 24.4 104.6 Low 06:42:36 - 07:12:36 -1195
Fall River/Burney 06:57:41 -65.9 Dark Up 23.6 103.5 Low 06:42:41 - 07:12:41 -1203
Susanville 06:57:43 -66.7 Dark Up 24.3 103.8 Low 06:42:43 - 07:12:43 -1257
Greenville 06:57:45 -66.9 Dark Up 24.2 103.4 Low 06:42:45 - 07:12:45 -1269
Gimple 06:57:45 -66.9 Dark Up 24.2 103.5 Low 06:42:45 - 07:12:45 -1271
Quincy 06:57:46 -67.0 Dark Up 24.2 103.3 Low 06:42:46 - 07:12:46 -1283
Portola 06:57:45 -67.3 Dark Up 24.6 103.6 Low 06:42:45 - 07:12:45 -1300
Reno 06:57:46 -67.8 Dark Up 25.1 104.0 Low 06:42:46 - 07:12:46 -1330
Carson City 06:57:48 -68.1 Dark Up 25.3 103.8 Low 06:42:48 - 07:12:48 -1354
Gardnerville 06:57:49 -68.4 Dark Up 25.4 103.8 Low 06:42:49 - 07:12:49 -1371
Yerington 06:57:47 -68.6 Dark Up 25.8 104.2 Low 06:42:47 - 07:12:47 -1379
Hawthorne 06:57:48 -69.2 Dark Up 26.3 104.4 Low 06:42:48 - 07:12:48 -1421
Lee Vining 06:57:53 -69.5 Dark Up 26.1 103.8 Low 06:42:53 - 07:12:53 -1449
Tonopah 06:57:48 -70.1 Dark Up 27.5 105.2 Low 06:42:48 - 07:12:48 -1481
Bishop 06:57:54 -70.3 Dark Up 26.8 104.0 Low 06:42:54 - 07:12:54 -1506
Beatty 06:57:52 -71.3 Dark Up 28.2 104.9 Low 06:42:52 - 07:12:52 -1572
Dunrhomin 06:57:01 -69.4 Dark Up 35.3 115.9 Up 06:42:01 - 07:12:01 -1592
CU-SBO 06:57:03 -69.7 Dark Up 35.4 115.7 Up 06:42:03 - 07:12:03 -1607
Indian Springs 06:57:51 -72.0 Dark Up 29.1 105.5 Low 06:42:51 - 07:12:51 -1618
Henderson 06:57:52 -72.7 Dark Up 29.8 105.7 Low 06:42:52 - 07:12:52 -1672
Wildwood 06:58:11 -73.0 Dark Up 27.4 102.3 Low 06:43:11 - 07:13:11 -1737
Patrick 06:57:52 -73.6 Dark Up 30.8 106.2 Up 06:42:52 - 07:12:52 -1742
Laughlin/Bullhead City 06:57:55 -73.6 Dark Up 30.3 105.5 Up 06:42:55 - 07:12:55 -1745
Kingman/Dolan Springs 06:57:53 -73.7 Dark Up 30.7 105.9 Up 06:42:53 - 07:12:53 -1754
Mohave Valley 06:57:56 -73.9 Dark Up 30.4 105.4 Up 06:42:56 - 07:12:56 -1765
Lake Havasu City 06:57:58 -74.3 Dark Up 30.7 105.3 Up 06:42:58 - 07:12:58 -1800
Idyllwild 06:58:08 -74.1 Dark Up 29.0 103.3 Low 06:43:08 - 07:13:08 -1804
Parker 06:58:00 -74.7 Dark Up 30.8 105.2 Up 06:43:00 - 07:13:00 -1827
Calipatria 06:58:07 -75.1 Dark Up 30.1 103.8 Up 06:43:07 - 07:13:07 -1877
George/Scottsdale 06:57:54 -75.7 Dark Up 32.9 106.6 Up 06:42:54 - 07:12:54 -1915
Yuma 06:58:07 -75.9 Dark Up 31.0 104.1 Up 06:43:07 - 07:13:07 -1930

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 55638, (2024/11/20 06:55UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.57  34
Alhena         06:37:42.8 +16:23:57  1.9 12.58  21
PPM 151776     07:01:55.2 +05:33:25  6.4  0.97  24
PPM 151918     07:05:58.6 +05:53:23  8.3  0.09  23
55638          07:05:40.0 +05:50:34 16.0        23
Positions are for J2000

Event circumstances last updated at 2022/03/30 23:17:55 UT

Marc W. Buie, Southwest Research Institute

RECON