RECON: TNO occultation with 472271

Event between (472271) 14UM33 and star GA1080:00266585 with event index number of 1057659

Geocentric closest approach at 2021/02/24 03:20:02 UTC

J2000 position of star is 02:34:30.2 +19:21:09
Equinox of date position of star is 02:35:37.2 +19:26:19
Stellar brightness G=14.8, use SENSEUP=128
Star is 73 degrees from the moon. Moon is 88% illuminated.
TNO apparent brightness V=21.2

[RECON map]
TNO is 43.4 AU from the Sun and 43.7 AU from the Earth.
The TNO is moving 16.0 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 377 seconds.
The 1-sigma cross-track error in the shadow position is 1685 km.
The sky-plane scale is 31725.6 km/arcsec.

The TNO has an absolute magnitude Hv=4.7
Diameter=691.9 km assuming a 5% albedo -- 43.2 sec chord
Diameter=282.4 km assuming a 30% albedo -- 17.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 472271, (2021/02/24 03:20UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:08.2 +16:33:01  0.8 28.98  46
Hamal          02:08:22.2 +23:33:41  2.0  7.57  77
26 Ari         02:31:49.8 +19:56:53  6.1  1.04  73
PPM 118332     02:34:47.7 +18:58:20  7.1  0.52  73
PPM 118335     02:35:01.3 +19:35:07 10.2  0.21  73
472271         02:35:41.5 +19:26:39 14.8        72
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 2.4 sigma about the mid-time.
The median site spacing is 25.6 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 03:23:32 -18.9 Dark Up 41.7 247.9 Up 03:08:32 - 03:38:32 3875
Kelowna 03:23:33 -18.8 Dark Up 41.9 248.0 Up 03:08:33 - 03:38:33 3837
Summerland 03:23:33 -18.7 Dark Up 42.1 248.1 Up 03:08:33 - 03:38:33 3810
Penticton 03:23:33 -18.8 Dark Up 42.1 248.2 Up 03:08:33 - 03:38:33 3805
Oliver 03:23:35 -18.9 Dark Up 42.2 248.6 Up 03:08:35 - 03:38:35 3772
Anarchist Mountain Observatory 03:23:37 -19.0 Dark Up 42.1 248.9 Up 03:08:37 - 03:38:37 3759
Tonasket 03:23:36 -19.0 Dark Up 42.3 249.1 Up 03:08:36 - 03:38:36 3728
Okanogan 03:23:38 -19.0 Dark Up 42.5 249.2 Up 03:08:38 - 03:38:38 3695
Brewster 03:23:38 -18.9 Dark Up 42.7 249.3 Up 03:08:38 - 03:38:38 3666
Victoria 03:23:24 -16.4 AT Up 44.8 245.2 Up 03:08:24 - 03:38:24 3665
Manson/Chelan 03:23:37 -18.6 Dark Up 43.0 249.1 Up 03:08:37 - 03:38:37 3642
Entiat 03:23:38 -18.6 Dark Up 43.2 249.2 Up 03:08:38 - 03:38:38 3620
Wenatchee 03:23:38 -18.6 Dark Up 43.3 249.3 Up 03:08:38 - 03:38:38 3595
Ellensburg 03:23:38 -18.5 Dark Up 43.6 249.5 Up 03:08:38 - 03:38:38 3552
Yakima 03:23:40 -18.5 Dark Up 43.7 249.9 Up 03:08:40 - 03:38:40 3513
Pasco 03:23:45 -19.6 Dark Up 42.9 251.5 Up 03:08:45 - 03:38:45 3498
Toppenish/White Swan 03:23:40 -18.7 Dark Up 43.7 250.2 Up 03:08:40 - 03:38:40 3494
PNWRO 03:23:47 -19.8 Dark Up 42.8 252.0 Up 03:08:47 - 03:38:47 3478
Goldendale 03:23:41 -18.4 Dark Up 44.2 250.3 Up 03:08:41 - 03:38:41 3435
The Dalles 03:23:40 -18.2 Dark Up 44.5 250.2 Up 03:08:40 - 03:38:40 3409
Maupin 03:23:42 -18.3 Dark Up 44.6 250.7 Up 03:08:42 - 03:38:42 3369
Redmond 03:23:45 -18.3 Dark Up 44.9 251.4 Up 03:08:45 - 03:38:45 3279
Sisters 03:23:43 -18.0 Dark Up 45.2 251.0 Up 03:08:43 - 03:38:43 3277
Bend 03:23:44 -18.2 Dark Up 45.1 251.5 Up 03:08:44 - 03:38:44 3256
Oregon Observatory 03:23:45 -18.2 Dark Up 45.2 251.6 Up 03:08:45 - 03:38:45 3238
La Pine/Gilchrist 03:23:45 -18.1 Dark Up 45.3 251.7 Up 03:08:45 - 03:38:45 3217
North Lake 03:23:47 -18.6 Dark Up 45.0 252.7 Up 03:08:47 - 03:38:47 3181
Niwot 03:24:49 -30.9 Dark Up 33.8 267.6 Up 03:09:49 - 03:39:49 3135
Paisley 03:23:50 -18.9 Dark Up 44.9 253.5 Up 03:08:50 - 03:38:50 3131
SwRI 03:24:49 -30.8 Dark Up 33.9 267.6 Up 03:09:49 - 03:39:49 3123
Lakeview 03:23:53 -19.1 Dark Up 44.9 254.2 Up 03:08:53 - 03:38:53 3083
Klamath Falls 03:23:48 -18.0 Dark Up 45.9 252.9 Up 03:08:48 - 03:38:48 3068
Cedarville 03:23:55 -19.3 Dark Up 45.0 255.0 Up 03:08:55 - 03:38:55 3019
Fall River/Burney 03:23:52 -18.4 Dark Up 46.0 254.4 Up 03:08:52 - 03:38:52 2954
Susanville 03:23:57 -19.0 Dark Up 45.6 255.7 Up 03:08:57 - 03:38:57 2900
Gimple 03:23:57 -18.9 Dark Up 45.8 255.8 Up 03:08:57 - 03:38:57 2869
Greenville 03:23:55 -18.8 Dark Up 45.9 255.7 Up 03:08:55 - 03:38:55 2868
Quincy 03:23:57 -18.8 Dark Up 45.9 255.9 Up 03:08:57 - 03:38:57 2847
Portola 03:23:59 -19.2 Dark Up 45.6 256.4 Up 03:08:59 - 03:38:59 2841
Reno 03:24:02 -19.7 Dark Up 45.2 257.2 Up 03:09:02 - 03:39:02 2823
Carson City 03:24:02 -19.8 Dark Up 45.2 257.6 Up 03:09:02 - 03:39:02 2787
Yerington 03:24:06 -20.3 Dark Up 44.8 258.3 Up 03:09:06 - 03:39:06 2776
Gardnerville 03:24:04 -19.8 Dark Up 45.2 257.9 Up 03:09:04 - 03:39:04 2762
Hawthorne 03:24:09 -20.8 Dark Up 44.4 259.2 Up 03:09:09 - 03:39:09 2736
Tonopah 03:24:16 -21.9 Dark Up 43.4 260.7 Up 03:09:16 - 03:39:16 2710
Lee Vining 03:24:09 -20.4 Dark Up 44.9 259.4 Up 03:09:09 - 03:39:09 2671
Bishop 03:24:13 -21.0 Dark Up 44.5 260.5 Up 03:09:13 - 03:39:13 2620
Beatty 03:24:20 -22.4 Dark Up 43.2 262.1 Up 03:09:20 - 03:39:20 2599
Indian Springs 03:24:25 -23.3 Dark Up 42.4 263.2 Up 03:09:25 - 03:39:25 2583
Henderson 03:24:29 -23.9 Dark Up 41.9 264.2 Up 03:09:29 - 03:39:29 2540
Patrick 03:24:35 -24.9 Dark Up 41.0 265.5 Up 03:09:35 - 03:39:35 2495
Searchlight/Boulder City 03:24:30 -24.1 Dark Up 41.9 264.7 Up 03:09:30 - 03:39:30 2482
DCO 03:24:38 -25.6 Dark Up 40.4 266.2 Up 03:09:38 - 03:39:38 2476
Kingman/Dolan Springs 03:24:35 -24.8 Dark Up 41.2 265.5 Up 03:09:35 - 03:39:35 2468
Laughlin/Bullhead City 03:24:33 -24.4 Dark Up 41.6 265.2 Up 03:09:33 - 03:39:33 2457
Mohave Valley 03:24:33 -24.4 Dark Up 41.6 265.5 Up 03:09:33 - 03:39:33 2428
Lake Havasu City 03:24:35 -24.7 Dark Up 41.4 266.0 Up 03:09:35 - 03:39:35 2391
CPSLO 03:24:08 -19.3 Dark Up 46.6 260.9 Up 03:09:08 - 03:39:08 2372
George/Scottsdale 03:24:46 -26.8 Dark Up 39.4 268.1 Up 03:09:46 - 03:39:46 2357
Parker 03:24:36 -24.7 Dark Up 41.4 266.3 Up 03:09:36 - 03:39:36 2355
Blythe 03:24:37 -24.5 Dark Up 41.7 266.6 Up 03:09:37 - 03:39:37 2295
Wildwood 03:24:20 -21.1 Dark Up 45.0 263.6 Up 03:09:20 - 03:39:20 2277
Idyllwild 03:24:28 -22.7 Dark Up 43.5 265.2 Up 03:09:28 - 03:39:28 2271
Calipatria 03:24:34 -23.8 Dark Up 42.5 266.5 Up 03:09:34 - 03:39:34 2227
Yuma 03:24:38 -24.6 Dark Up 41.8 267.4 Up 03:09:38 - 03:39:38 2198

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 472271, (2021/02/24 03:20UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 28.98  46
Hamal          02:07:10.7 +23:27:42  2.0  7.57  77
26 Ari         02:30:38.5 +19:51:19  6.1  1.04  73
PPM 118332     02:33:36.6 +18:52:48  7.1  0.52  73
PPM 118335     02:33:50.0 +19:29:36 10.2  0.21  73
472271         02:34:30.2 +19:21:09 14.8        73
Positions are for J2000

Event circumstances last updated at 2019/11/13 21:11:50 UT

Marc W. Buie, Southwest Research Institute

RECON