RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star GA0940:02621464 with event index number of 1658424

Geocentric closest approach at 2027/01/10 05:21:50 UTC

J2000 position of star is 07:18:39.8 +05:12:59
Equinox of date position of star is 07:19:42.8 +05:10:45
Stellar brightness G=15.8, use SENSEUP=128
Star is 150 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=20.3

[RECON map]
TNO is 32.0 AU from the Sun and 31.0 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 291 seconds.
The 1-sigma cross-track error in the shadow position is 2498 km.
The sky-plane scale is 22492.3 km/arcsec.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 21.3 sec chord
Diameter=214.3 km assuming a 30% albedo -- 8.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 55638, (2027/01/10 05:22UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:38.1 +07:24:35  0.4 20.86 131
Alhena         06:39:16.4 +16:22:26  1.9 15.03 143
PPM 152316     07:18:44.8 +06:37:51  6.4  1.50 150
PPM 152294     07:18:08.7 +05:18:39  8.4  0.51 150
PPM 152381     07:20:43.5 +05:13:49  8.9  0.17 150
55638          07:20:06.0 +05:09:55 15.8       150
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 3.1 sigma about the mid-time.
The median site spacing is 22.8 km RECON observability=1.0 and success probability=12.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 05:23:58 -47.8 Dark Down 34.6 131.1 Up 05:08:58 - 05:38:58 -2211
Kelowna 05:23:59 -47.9 Dark Down 34.8 130.8 Up 05:08:59 - 05:38:59 -2244
Summerland 05:24:00 -47.9 Dark Down 34.9 130.4 Up 05:09:00 - 05:39:00 -2267
Penticton 05:24:00 -48.0 Dark Down 35.0 130.5 Up 05:09:00 - 05:39:00 -2272
Oliver 05:24:00 -48.2 Dark Down 35.2 130.3 Up 05:09:00 - 05:39:00 -2302
Anarchist Mountain Observatory 05:24:00 -48.4 Dark Down 35.4 130.4 Up 05:09:00 - 05:39:00 -2315
Tonasket 05:24:01 -48.4 Dark Down 35.6 130.2 Up 05:09:01 - 05:39:01 -2342
Victoria 05:24:11 -46.1 Dark Down 33.7 126.0 Up 05:09:11 - 05:39:11 -2371
Okanogan 05:24:02 -48.5 Dark Down 35.7 129.9 Up 05:09:02 - 05:39:02 -2372
Brewster 05:24:03 -48.5 Dark Down 35.8 129.5 Up 05:09:03 - 05:39:03 -2396
Manson/Chelan 05:24:04 -48.4 Dark Down 35.8 129.0 Up 05:09:04 - 05:39:04 -2415
Entiat 05:24:05 -48.4 Dark Down 35.9 128.8 Up 05:09:05 - 05:39:05 -2434
Wenatchee 05:24:05 -48.4 Dark Down 36.0 128.6 Up 05:09:05 - 05:39:05 -2457
Ellensburg 05:24:07 -48.5 Dark Down 36.1 128.1 Up 05:09:07 - 05:39:07 -2493
Yakima 05:24:07 -48.6 Dark Down 36.3 127.9 Up 05:09:07 - 05:39:07 -2529
Toppenish/White Swan 05:24:07 -48.8 Dark Down 36.6 127.9 Up 05:09:07 - 05:39:07 -2548
Pasco 05:24:05 -49.7 Dark Down 37.3 129.2 Up 05:09:05 - 05:39:05 -2554
PNWRO 05:24:04 -49.9 Dark Down 37.6 129.2 Up 05:09:04 - 05:39:04 -2574
Goldendale 05:24:09 -48.7 Dark Down 36.7 127.1 Up 05:09:09 - 05:39:09 -2598
The Dalles 05:24:10 -48.6 Dark Down 36.6 126.6 Up 05:09:10 - 05:39:10 -2619
Maupin 05:24:10 -48.8 Dark Down 36.9 126.5 Up 05:09:10 - 05:39:10 -2656
Sisters 05:24:13 -48.8 Dark Down 37.2 125.5 Up 05:09:13 - 05:39:13 -2737
Redmond 05:24:12 -49.0 Dark Down 37.4 125.9 Up 05:09:12 - 05:39:12 -2738
Bend 05:24:13 -49.0 Dark Down 37.5 125.6 Up 05:09:13 - 05:39:13 -2758
Oregon Observatory 05:24:14 -49.0 Dark Down 37.5 125.3 Up 05:09:14 - 05:39:14 -2774
La Pine/Gilchrist 05:24:14 -49.0 Dark Down 37.6 125.2 Up 05:09:14 - 05:39:14 -2793
North Lake 05:24:13 -49.6 Dark Down 38.2 125.5 Up 05:09:13 - 05:39:13 -2830
Paisley 05:24:13 -50.0 Dark Down 38.7 125.5 Up 05:09:13 - 05:39:13 -2880
Lakeview 05:24:13 -50.3 Dark Down 39.1 125.4 Up 05:09:13 - 05:39:13 -2926
Klamath Falls 05:24:17 -49.2 Dark Down 38.2 124.0 Up 05:09:17 - 05:39:17 -2928
Cedarville 05:24:14 -50.6 Dark Down 39.6 125.1 Up 05:09:14 - 05:39:14 -2986
Niwot 05:23:33 -61.4 Dark Down 48.8 141.3 Up 05:08:33 - 05:38:33 -3035
Fall River/Burney 05:24:18 -49.8 Dark Down 39.1 123.6 Up 05:09:18 - 05:39:18 -3037
SwRI 05:23:33 -61.4 Dark Down 48.8 141.1 Up 05:08:33 - 05:38:33 -3046
Susanville 05:24:17 -50.6 Dark Down 39.9 123.9 Up 05:09:17 - 05:39:17 -3093
Gimple 05:24:18 -50.5 Dark Down 40.0 123.5 Up 05:09:18 - 05:39:18 -3120
Greenville 05:24:18 -50.4 Dark Down 39.9 123.4 Up 05:09:18 - 05:39:18 -3120
Quincy 05:24:18 -50.5 Dark Down 40.0 123.2 Up 05:09:18 - 05:39:18 -3140
Portola 05:24:17 -50.8 Dark Down 40.4 123.6 Up 05:09:17 - 05:39:17 -3150
Reno 05:24:16 -51.4 Dark Down 41.0 124.1 Up 05:09:16 - 05:39:16 -3172
Carson City 05:24:16 -51.5 Dark Down 41.2 123.9 Up 05:09:16 - 05:39:16 -3207
Yerington 05:24:15 -52.0 Dark Down 41.7 124.4 Up 05:09:15 - 05:39:15 -3223
Gardnerville 05:24:16 -51.6 Dark Down 41.3 123.7 Up 05:09:16 - 05:39:16 -3230
Hawthorne 05:24:14 -52.5 Dark Down 42.3 124.5 Up 05:09:14 - 05:39:14 -3265
Tonopah 05:24:10 -53.7 Dark Down 43.5 125.6 Up 05:09:10 - 05:39:10 -3303
Lee Vining 05:24:16 -52.3 Dark Down 42.3 123.6 Up 05:09:16 - 05:39:16 -3321
Bishop 05:24:14 -53.0 Dark Down 43.1 123.9 Up 05:09:14 - 05:39:14 -3377
Beatty 05:24:10 -54.4 Dark Down 44.4 125.2 Up 05:09:10 - 05:39:10 -3414
Indian Springs 05:24:08 -55.3 Dark Down 45.3 126.1 Up 05:09:08 - 05:39:08 -3440
Henderson 05:24:06 -55.9 Dark Down 46.1 126.4 Up 05:09:06 - 05:39:06 -3489
Patrick 05:24:03 -57.0 Dark Down 47.2 127.1 Up 05:09:03 - 05:39:03 -3545
Searchlight/Boulder City 05:24:06 -56.1 Dark Down 46.5 126.0 Up 05:09:06 - 05:39:06 -3545
Kingman/Dolan Springs 05:24:04 -56.9 Dark Down 47.2 126.7 Up 05:09:04 - 05:39:04 -3568
DCO 05:24:01 -57.6 Dark Down 47.8 127.6 Up 05:09:01 - 05:39:01 -3571
Laughlin/Bullhead City 05:24:06 -56.5 Dark Down 46.9 126.1 Up 05:09:06 - 05:39:06 -3573
CPSLO 05:24:23 -51.6 Dark Down 42.7 120.1 Up 05:09:23 - 05:39:23 -3590
Mohave Valley 05:24:05 -56.5 Dark Down 47.0 125.9 Up 05:09:05 - 05:39:05 -3600
Lake Havasu City 05:24:05 -56.8 Dark Down 47.4 125.8 Up 05:09:05 - 05:39:05 -3639
Parker 05:24:06 -56.9 Dark Down 47.6 125.5 Up 05:09:06 - 05:39:06 -3674
Wildwood 05:24:19 -53.5 Dark Down 44.7 121.1 Up 05:09:19 - 05:39:19 -3701
George/Scottsdale 05:23:58 -59.0 Dark Down 49.5 127.8 Up 05:08:58 - 05:38:58 -3701
Idyllwild 05:24:13 -55.1 Dark Down 46.2 122.6 Up 05:09:13 - 05:39:13 -3727
Blythe 05:24:07 -56.8 Dark Down 47.7 124.7 Up 05:09:07 - 05:39:07 -3728
Calipatria 05:24:10 -56.1 Dark Down 47.4 123.3 Up 05:09:10 - 05:39:10 -3783
Yuma 05:24:08 -56.9 Dark Down 48.2 123.8 Up 05:09:08 - 05:39:08 -3821

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, (2027/01/10 05:22UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 20.86 131
Alhena         06:37:42.8 +16:23:57  1.9 15.03 143
PPM 152316     07:17:17.8 +06:40:52  6.4  1.50 150
PPM 152294     07:16:42.4 +05:21:39  8.4  0.51 150
PPM 152381     07:19:17.2 +05:16:55  8.9  0.17 150
55638          07:18:39.8 +05:12:59 15.8       150
Positions are for J2000

Event circumstances last updated at 2019/10/04 23:03:30 UT

Marc W. Buie, Southwest Research Institute

RECON