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 03:14:47 UTC

J2000 position of star is 02:34:30.2 +19:21:09
Equinox of date position of star is 02:35:41.2 +19:26:38
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
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 125 seconds.
The 1-sigma cross-track error in the shadow position is 1590 km.
The sky-plane scale is 31725.8 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 03:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:08.2 +16:33:00  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 5.0 sigma about the mid-time.
The median site spacing is 26.4 km RECON observability=1.0 and success probability=9.8%
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 03:18:13 -18.0 Dark Up 42.5 246.6 Up 03:07:16 - 03:29:10 4248
Kelowna 03:18:14 -18.0 AT Up 42.7 246.7 Up 03:07:17 - 03:29:11 4210
Peachland 03:18:13 -17.8 AT Up 42.9 246.5 Up 03:07:16 - 03:29:10 4196
Summerland 03:18:14 -17.9 AT Up 42.9 246.8 Up 03:07:17 - 03:29:11 4183
Penticton 03:18:14 -18.0 AT Up 42.9 246.9 Up 03:07:17 - 03:29:11 4178
Oliver 03:18:16 -18.0 Dark Up 43.0 247.2 Up 03:07:19 - 03:29:13 4145
Anarchist Mountain Observatory 03:18:17 -18.2 Dark Up 43.0 247.6 Up 03:07:20 - 03:29:14 4131
Tonasket 03:18:18 -18.1 Dark Up 43.1 247.8 Up 03:07:21 - 03:29:15 4101
Okanogan 03:18:18 -18.1 Dark Up 43.3 247.9 Up 03:07:21 - 03:29:15 4067
Victoria 03:18:04 -15.5 AT Up 45.6 243.8 Up 03:07:07 - 03:29:01 4040
Brewster 03:18:18 -18.0 AT Up 43.6 248.0 Up 03:07:21 - 03:29:15 4039
Manson/Chelan 03:18:17 -17.8 AT Up 43.9 247.8 Up 03:07:20 - 03:29:14 4015
Wenatchee 03:18:18 -17.7 AT Up 44.2 248.0 Up 03:07:21 - 03:29:15 3967
Ellensburg 03:18:19 -17.6 AT Up 44.4 248.2 Up 03:07:22 - 03:29:16 3925
Yakima 03:18:20 -17.6 AT Up 44.6 248.6 Up 03:07:23 - 03:29:17 3886
Pasco 03:18:26 -18.6 Dark Up 43.8 250.3 Up 03:07:29 - 03:29:23 3870
Toppenish/White Swan 03:18:22 -17.7 AT Up 44.6 248.9 Up 03:07:25 - 03:29:19 3866
PNWRO 03:18:28 -18.8 Dark Up 43.7 250.7 Up 03:07:31 - 03:29:25 3849
Goldendale 03:18:21 -17.5 AT Up 45.0 249.0 Up 03:07:24 - 03:29:18 3808
The Dalles 03:18:21 -17.3 AT Up 45.4 248.9 Up 03:07:24 - 03:29:18 3781
Maupin 03:18:23 -17.4 AT Up 45.4 249.4 Up 03:07:26 - 03:29:20 3742
Redmond 03:18:25 -17.4 AT Up 45.8 250.2 Up 03:07:28 - 03:29:22 3652
Sisters 03:18:23 -17.1 AT Up 46.1 249.8 Up 03:07:26 - 03:29:20 3649
Bend 03:18:24 -17.3 AT Up 46.0 250.3 Up 03:07:27 - 03:29:21 3629
Oregon Observatory 03:18:25 -17.2 AT Up 46.1 250.3 Up 03:07:28 - 03:29:22 3610
La Pine/Gilchrist 03:18:25 -17.2 AT Up 46.2 250.5 Up 03:07:28 - 03:29:22 3589
North Lake 03:18:28 -17.6 AT Up 46.0 251.5 Up 03:07:31 - 03:29:25 3553
Dunrhomin 03:19:30 -29.9 Dark Up 34.8 266.6 Up 03:08:33 - 03:30:27 3511
Paisley 03:18:31 -17.9 AT Up 45.9 252.3 Up 03:07:34 - 03:29:28 3502
Lakeview 03:18:33 -18.1 Dark Up 45.9 253.0 Up 03:07:36 - 03:29:30 3454
Klamath Falls 03:18:27 -17.0 AT Up 46.9 251.7 Up 03:07:30 - 03:29:24 3440
Cedarville 03:18:35 -18.3 Dark Up 45.9 253.8 Up 03:07:38 - 03:29:32 3390
Fall River/Burney 03:18:32 -17.4 AT Up 47.0 253.2 Up 03:07:35 - 03:29:29 3325
Susanville 03:18:37 -18.0 Dark Up 46.6 254.5 Up 03:07:40 - 03:29:34 3271
Gimple 03:18:36 -17.9 AT Up 46.8 254.6 Up 03:07:39 - 03:29:33 3240
Greenville 03:18:36 -17.8 AT Up 46.9 254.6 Up 03:07:39 - 03:29:33 3239
Quincy 03:18:36 -17.8 AT Up 46.9 254.8 Up 03:07:39 - 03:29:33 3218
Portola 03:18:38 -18.2 Dark Up 46.6 255.3 Up 03:07:41 - 03:29:35 3212
Reno 03:18:42 -18.7 Dark Up 46.2 256.1 Up 03:07:45 - 03:29:39 3193
Carson City 03:18:43 -18.8 Dark Up 46.2 256.5 Up 03:07:46 - 03:29:40 3157
Yerington 03:18:46 -19.3 Dark Up 45.8 257.3 Up 03:07:49 - 03:29:43 3146
Gardnerville 03:18:43 -18.8 Dark Up 46.2 256.8 Up 03:07:46 - 03:29:40 3132
Hawthorne 03:18:49 -19.7 Dark Up 45.5 258.2 Up 03:07:52 - 03:29:46 3105
Tonopah 03:18:56 -20.9 Dark Up 44.4 259.7 Up 03:07:59 - 03:29:53 3079
Lee Vining 03:18:48 -19.4 Dark Up 46.0 258.3 Up 03:07:51 - 03:29:45 3041
Bishop 03:18:52 -20.0 Dark Up 45.5 259.5 Up 03:07:55 - 03:29:49 2989
Beatty 03:19:00 -21.3 Dark Up 44.3 261.2 Up 03:08:03 - 03:29:57 2966
Indian Springs 03:19:05 -22.3 Dark Up 43.4 262.3 Up 03:08:08 - 03:30:02 2950
Henderson 03:19:09 -22.9 Dark Up 42.9 263.3 Up 03:08:12 - 03:30:06 2906
Patrick 03:19:15 -23.9 Dark Up 42.1 264.6 Up 03:08:18 - 03:30:12 2860
Kingman/Dolan Springs 03:19:15 -23.7 Dark Up 42.3 264.7 Up 03:08:18 - 03:30:12 2834
Laughlin/Bullhead City 03:19:13 -23.3 Dark Up 42.7 264.4 Up 03:08:16 - 03:30:10 2822
Mohave Valley 03:19:13 -23.3 Dark Up 42.7 264.6 Up 03:08:16 - 03:30:10 2794
Lake Havasu City 03:19:15 -23.6 Dark Up 42.5 265.1 Up 03:08:18 - 03:30:12 2757
CPSLO 03:18:48 -18.2 Dark Up 47.7 259.9 Up 03:07:51 - 03:29:45 2742
Parker 03:19:17 -23.6 Dark Up 42.5 265.5 Up 03:08:20 - 03:30:14 2720
George/Scottsdale 03:19:27 -25.7 Dark Up 40.5 267.4 Up 03:08:30 - 03:30:24 2720
Blythe 03:19:16 -23.4 Dark Up 42.8 265.8 Up 03:08:19 - 03:30:13 2660
Wildwood 03:18:59 -20.0 Dark Up 46.1 262.7 Up 03:08:02 - 03:29:56 2645
Idyllwild 03:19:08 -21.6 Dark Up 44.6 264.3 Up 03:08:11 - 03:30:05 2637
Calipatria 03:19:14 -22.7 Dark Up 43.6 265.7 Up 03:08:17 - 03:30:11 2593
Yuma 03:19:18 -23.5 Dark Up 42.9 266.6 Up 03:08:21 - 03:30:15 2563

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 03:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 28.98  46
Hamal          02:07:10.7 +23:27:42  2.0  7.57  77
26 Ari         02:30:38.5 +19:51:18  6.1  1.04  73
PPM 118332     02:33:36.7 +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        72
Positions are for J2000

Event circumstances last updated at 2021/01/22 20:43:48 UT

Marc W. Buie, Southwest Research Institute

RECON