RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1100:11294182 with event index number of 1134505

Geocentric closest approach at 2021/06/27 05:56:20 UTC

J2000 position of star is 19:45:08.5 +21:09:07
Equinox of date position of star is 19:46:03.5 +21:12:15
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 46 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 27.4 AU from the Sun and 26.7 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 85 seconds.
The 1-sigma cross-track error in the shadow position is 1259 km.
The sky-plane scale is 19362.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.6 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523700, (2021/06/27 05:56UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:40.0 +38:48:17  0.0 22.92  69
Tarazed        19:47:16.9 +10:40:01  2.7 10.54  37
PPM 109474     19:41:24.7 +20:31:40  6.2  1.28  46
PPM 109744     19:49:14.0 +21:25:51  8.5  0.77  46
PPM 109613     19:45:14.3 +21:23:16  9.6  0.27  47
PPM 109651     19:46:19.9 +21:10:54 11.1  0.06  46
523700         19:46:04.6 +21:12:19 16.8        46
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 24.7 km RECON observability=0.7 and success probability=2.6%
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 05:58:46 -11.7 NT Down 41.2 107.5 Up 05:51:10 - 06:06:21 5132
Kelowna 05:58:47 -12.0 NT Down 41.2 107.1 Up 05:51:12 - 06:06:23 5101
Peachland 05:58:48 -12.0 NT Down 41.0 106.7 Up 05:51:13 - 06:06:24 5098
Summerland 05:58:48 -12.1 AT Down 41.1 106.7 Up 05:51:13 - 06:06:24 5083
Penticton 05:58:48 -12.2 AT Down 41.2 106.7 Up 05:51:13 - 06:06:24 5075
Victoria 05:58:59 -11.8 NT Down 39.1 102.5 Up 05:51:24 - 06:06:35 5069
Oliver 05:58:49 -12.5 AT Down 41.3 106.4 Up 05:51:14 - 06:06:25 5044
Anarchist Mountain Observatory 05:58:49 -12.8 AT Down 41.5 106.5 Up 05:51:14 - 06:06:25 5026
Tonasket 05:58:51 -13.0 AT Down 41.5 106.1 Up 05:51:15 - 06:06:26 5000
Okanogan 05:58:52 -13.3 AT Down 41.5 105.7 Up 05:51:16 - 06:06:27 4974
Brewster 05:58:53 -13.4 AT Down 41.5 105.3 Up 05:51:18 - 06:06:29 4954
Manson/Chelan 05:58:54 -13.5 AT Down 41.3 104.8 Up 05:51:19 - 06:06:30 4943
Wenatchee 05:58:56 -13.9 AT Down 41.3 104.3 Up 05:51:21 - 06:06:32 4905
Ellensburg 05:58:58 -14.1 AT Down 41.3 103.7 Up 05:51:22 - 06:06:33 4873
Yakima 05:58:59 -14.5 AT Down 41.4 103.4 Up 05:51:24 - 06:06:35 4838
Toppenish/White Swan 05:58:59 -14.7 AT Down 41.5 103.3 Up 05:51:24 - 06:06:35 4814
Pasco 05:58:57 -15.3 AT Down 42.4 104.3 Up 05:51:21 - 06:06:32 4776
Goldendale 05:59:02 -15.1 AT Down 41.4 102.5 Up 05:51:26 - 06:06:37 4774
The Dalles 05:59:03 -15.1 AT Down 41.2 102.0 Up 05:51:28 - 06:06:39 4762
PNWRO 05:58:57 -15.6 AT Down 42.6 104.3 Up 05:51:22 - 06:06:33 4749
Maupin 05:59:04 -15.5 AT Down 41.3 101.7 Up 05:51:29 - 06:06:40 4722
Sisters 05:59:08 -16.1 AT Down 41.2 100.6 Up 05:51:32 - 06:06:43 4654
Redmond 05:59:07 -16.3 AT Down 41.5 100.9 Up 05:51:32 - 06:06:43 4642
Bend 05:59:08 -16.4 AT Down 41.4 100.6 Up 05:51:33 - 06:06:44 4626
Oregon Observatory 05:59:09 -16.5 AT Down 41.3 100.3 Up 05:51:33 - 06:06:44 4614
La Pine/Gilchrist 05:59:10 -16.7 AT Down 41.3 100.1 Up 05:51:34 - 06:06:45 4596
North Lake 05:59:09 -17.3 AT Down 41.8 100.2 Up 05:51:34 - 06:06:45 4542
Paisley 05:59:10 -17.9 AT Down 42.2 100.0 Up 05:51:35 - 06:06:46 4483
Klamath Falls 05:59:14 -17.8 AT Down 41.4 98.6 Up 05:51:39 - 06:06:50 4468
Lakeview 05:59:11 -18.4 Dark Up 42.4 99.7 Up 05:51:36 - 06:06:47 4431
Cedarville 05:59:12 -19.0 Dark Up 42.7 99.3 Up 05:51:37 - 06:06:48 4365
Fall River/Burney 05:59:17 -19.0 Dark Up 41.8 97.9 Up 05:51:41 - 06:06:52 4349
Susanville 05:59:17 -19.8 Dark Up 42.5 97.9 Up 05:51:41 - 06:06:52 4271
Greenville 05:59:18 -19.9 Dark Up 42.3 97.4 Up 05:51:42 - 06:06:53 4252
Gimple 05:59:18 -20.0 Dark Up 42.4 97.5 Up 05:51:42 - 06:06:53 4250
Quincy 05:59:18 -20.1 Dark Up 42.3 97.3 Up 05:51:43 - 06:06:54 4233
Portola 05:59:18 -20.4 Dark Up 42.7 97.5 Up 05:51:42 - 06:06:53 4209
Reno 05:59:17 -20.9 Dark Up 43.2 97.7 Up 05:51:41 - 06:06:52 4168
Carson City 05:59:17 -21.2 Dark Up 43.3 97.4 Up 05:51:42 - 06:06:53 4133
Gardnerville 05:59:18 -21.4 Dark Up 43.4 97.2 Up 05:51:42 - 06:06:53 4109
Yerington 05:59:16 -21.6 Dark Up 43.8 97.7 Up 05:51:41 - 06:06:52 4099
Hawthorne 05:59:16 -22.2 Dark Up 44.3 97.6 Up 05:51:41 - 06:06:52 4041
Lee Vining 05:59:19 -22.5 Dark Up 44.0 96.7 Up 05:51:43 - 06:06:54 3998
Tonopah 05:59:14 -23.2 Dark Up 45.5 98.2 Up 05:51:38 - 06:06:49 3962
Dunrhomin 05:58:34 -24.7 Dark Up 53.8 110.9 Up 05:50:58 - 06:06:09 3923
Bishop 05:59:18 -23.3 Dark Up 44.6 96.7 Up 05:51:43 - 06:06:54 3922
Beatty 05:59:15 -24.4 Dark Up 46.0 97.3 Up 05:51:39 - 06:06:50 3837
Indian Springs 05:59:13 -25.1 Dark Up 46.9 97.7 Up 05:51:37 - 06:06:48 3778
CPSLO 05:59:29 -24.2 Dark Up 43.0 93.2 Up 05:51:53 - 06:07:04 3776
Henderson 05:59:12 -25.8 Dark Up 47.5 97.7 Up 05:51:37 - 06:06:48 3709
Patrick 05:59:10 -26.7 Dark Up 48.5 97.8 Up 05:51:35 - 06:06:46 3620
Laughlin/Bullhead City 05:59:13 -26.7 Dark Up 47.9 97.0 Up 05:51:37 - 06:06:48 3611
Wildwood 05:59:26 -26.1 Dark Up 44.8 93.3 Up 05:51:51 - 06:07:02 3603
Kingman/Dolan Springs 05:59:11 -26.9 Dark Up 48.3 97.4 Up 05:51:36 - 06:06:47 3602
Mohave Valley 05:59:13 -27.0 Dark Up 48.0 96.7 Up 05:51:38 - 06:06:49 3584
Lake Havasu City 05:59:13 -27.4 Dark Up 48.2 96.4 Up 05:51:38 - 06:06:49 3537
Idyllwild 05:59:22 -27.2 Dark Up 46.3 94.1 Up 05:51:46 - 06:06:57 3519
Parker 05:59:14 -27.7 Dark Up 48.3 96.1 Up 05:51:38 - 06:06:49 3501
Blythe 05:59:16 -28.1 Dark Up 48.1 95.3 Up 05:51:40 - 06:06:51 3455
Calipatria 05:59:20 -28.2 Dark Up 47.4 94.2 Up 05:51:44 - 06:06:55 3428
George/Scottsdale 05:59:07 -29.0 Dark Up 50.3 97.2 Up 05:51:32 - 06:06:43 3401
Yuma 05:59:18 -28.9 Dark Up 48.1 94.2 Up 05:51:42 - 06:06:53 3362

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 523700, (2021/06/27 05:56UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 22.92  69
Tarazed        19:46:15.6 +10:36:48  2.7 10.54  37
PPM 109474     19:40:28.3 +20:28:36  6.2  1.28  46
PPM 109744     19:48:17.9 +21:22:34  8.5  0.77  46
PPM 109613     19:44:18.3 +21:20:06  9.6  0.27  47
PPM 109651     19:45:23.8 +21:07:42 11.1  0.06  46
523700         19:45:08.5 +21:09:07 16.8        46
Positions are for J2000

Event circumstances last updated at 2021/01/23 20:03:47 UT

Marc W. Buie, Southwest Research Institute

RECON