RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1100:11454084 with event index number of 1134494

Geocentric closest approach at 2021/06/16 09:35:00 UTC

J2000 position of star is 19:46:19.8 +21:07:44
Equinox of date position of star is 19:47:14.8 +21:10:54
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 126 degrees from the moon. Moon is 32% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 27.4 AU from the Sun and 26.8 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 93 seconds.
The 1-sigma cross-track error in the shadow position is 1330 km.
The sky-plane scale is 19410.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 11.6 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523700, (2021/06/16 09:35UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:39.9 +38:48:17  0.0 23.10 104
Tarazed        19:47:16.8 +10:40:01  2.7 10.52 132
PPM 109474     19:41:24.6 +20:31:40  6.2  1.52 125
PPM 109744     19:49:13.9 +21:25:50  8.5  0.52 126
PPM 109685     19:47:15.6 +20:58:49  8.8  0.20 126
523700         19:47:15.8 +21:10:57 16.3       126
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 29.0 km RECON observability=0.9 and success probability=25.0%
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 09:35:54 -13.3 AT Down 60.4 166.6 Up 09:27:38 - 09:44:10 -422
Kelowna 09:35:54 -13.7 AT Down 60.7 166.2 Up 09:27:38 - 09:44:10 -461
Peachland 09:35:55 -13.8 AT Down 60.8 165.6 Up 09:27:39 - 09:44:11 -475
Summerland 09:35:55 -13.9 AT Down 60.9 165.7 Up 09:27:39 - 09:44:11 -488
Penticton 09:35:55 -14.0 AT Down 61.0 165.9 Up 09:27:39 - 09:44:11 -494
Oliver 09:35:54 -14.3 AT Down 61.4 165.7 Up 09:27:38 - 09:44:10 -529
Anarchist Mountain Observatory 09:35:54 -14.4 AT Down 61.6 166.0 Up 09:27:38 - 09:44:10 -543
Tonasket 09:35:54 -14.7 AT Down 61.8 165.7 Up 09:27:38 - 09:44:10 -575
Okanogan 09:35:54 -15.1 AT Down 62.1 165.3 Up 09:27:38 - 09:44:10 -609
Victoria 09:36:08 -15.8 AT Down 61.2 158.1 Up 09:27:52 - 09:44:24 -626
Brewster 09:35:55 -15.4 AT Down 62.4 164.8 Up 09:27:39 - 09:44:11 -638
Manson/Chelan 09:35:56 -15.7 AT Down 62.5 163.9 Up 09:27:40 - 09:44:12 -662
Wenatchee 09:35:57 -16.1 AT Down 62.9 163.3 Up 09:27:41 - 09:44:13 -711
Ellensburg 09:35:57 -16.6 AT Down 63.3 162.7 Up 09:27:41 - 09:44:13 -755
Yakima 09:35:57 -17.0 AT Down 63.7 162.4 Up 09:27:41 - 09:44:13 -796
Toppenish/White Swan 09:35:57 -17.1 AT Down 63.9 162.6 Up 09:27:41 - 09:44:13 -816
Pasco 09:35:52 -16.9 AT Down 64.3 165.1 Up 09:27:36 - 09:44:08 -816
PNWRO 09:35:51 -17.1 AT Down 64.5 165.5 Up 09:27:35 - 09:44:07 -839
Goldendale 09:35:58 -17.7 AT Down 64.3 161.4 Up 09:27:42 - 09:44:14 -876
The Dalles 09:35:59 -18.0 Dark Down 64.5 160.5 Up 09:27:43 - 09:44:15 -902
Maupin 09:35:59 -18.4 Dark Down 64.9 160.4 Up 09:27:43 - 09:44:15 -943
Redmond 09:35:59 -19.3 Dark Down 65.7 159.5 Up 09:27:43 - 09:44:15 -1037
Sisters 09:36:01 -19.3 Dark Down 65.6 158.7 Up 09:27:45 - 09:44:17 -1038
Bend 09:36:00 -19.5 Dark Down 65.9 159.0 Up 09:27:44 - 09:44:16 -1060
Oregon Observatory 09:36:00 -19.7 Dark Down 66.0 158.6 Up 09:27:44 - 09:44:16 -1079
La Pine/Gilchrist 09:36:00 -19.9 Dark Down 66.2 158.3 Up 09:27:44 - 09:44:16 -1100
North Lake 09:35:58 -20.1 Dark Down 66.7 159.3 Up 09:27:42 - 09:44:14 -1139
Paisley 09:35:56 -20.6 Dark Down 67.4 159.6 Up 09:27:40 - 09:44:12 -1193
Dunrhomin 09:34:51 -17.0 AT Down 70.0 199.0 Up 09:26:35 - 09:43:07 -1229
Lakeview 09:35:55 -21.0 Dark Down 67.9 159.6 Up 09:27:39 - 09:44:11 -1244
Klamath Falls 09:36:01 -21.3 Dark Down 67.4 156.4 Up 09:27:45 - 09:44:17 -1253
Cedarville 09:35:54 -21.5 Dark Down 68.5 159.5 Up 09:27:38 - 09:44:10 -1310
Fall River/Burney 09:35:59 -22.3 Dark Down 68.6 156.1 Up 09:27:43 - 09:44:15 -1373
Susanville 09:35:56 -22.7 Dark Down 69.4 157.2 Up 09:27:40 - 09:44:12 -1431
Gimple 09:35:57 -23.0 Dark Down 69.6 156.4 Up 09:27:41 - 09:44:13 -1463
Greenville 09:35:57 -23.0 Dark Down 69.6 156.2 Up 09:27:41 - 09:44:13 -1463
Quincy 09:35:57 -23.2 Dark Down 69.8 156.0 Up 09:27:41 - 09:44:13 -1485
Portola 09:35:55 -23.2 Dark Down 70.1 157.1 Up 09:27:39 - 09:44:11 -1493
Reno 09:35:52 -23.2 Dark Down 70.5 158.5 Up 09:27:36 - 09:44:08 -1514
Carson City 09:35:52 -23.6 Dark Down 70.8 158.1 Up 09:27:36 - 09:44:08 -1552
Yerington 09:35:48 -23.5 Dark Down 71.2 159.6 Up 09:27:32 - 09:44:04 -1565
Gardnerville 09:35:51 -23.8 Dark Down 71.1 158.0 Up 09:27:35 - 09:44:07 -1577
Hawthorne 09:35:46 -23.8 Dark Down 71.8 160.6 Up 09:27:30 - 09:44:02 -1608
Tonopah 09:35:40 -23.7 Dark Down 72.5 164.3 Up 09:27:24 - 09:43:56 -1641
Lee Vining 09:35:48 -24.5 Dark Down 72.2 158.6 Up 09:27:32 - 09:44:04 -1673
Bishop 09:35:44 -24.8 Dark Down 72.9 160.1 Up 09:27:28 - 09:44:00 -1729
Beatty 09:35:37 -24.6 Dark Down 73.7 164.7 Up 09:27:21 - 09:43:53 -1758
Indian Springs 09:35:32 -24.5 Dark Down 74.3 167.9 Up 09:27:16 - 09:43:48 -1778
Henderson 09:35:29 -24.7 Dark Down 74.9 169.9 Up 09:27:13 - 09:43:45 -1826
Patrick 09:35:24 -24.8 Dark Down 75.6 173.5 Up 09:27:08 - 09:43:40 -1876
Kingman/Dolan Springs 09:35:25 -25.1 Dark Down 75.8 172.7 Up 09:27:09 - 09:43:41 -1903
Laughlin/Bullhead City 09:35:27 -25.3 Dark Down 75.8 170.8 Up 09:27:11 - 09:43:43 -1913
Mohave Valley 09:35:26 -25.5 Dark Down 76.1 170.6 Up 09:27:10 - 09:43:42 -1942
CPSLO 09:35:53 -27.4 Dark Down 74.0 150.3 Up 09:27:37 - 09:44:09 -1974
Lake Havasu City 09:35:25 -25.8 Dark Down 76.5 171.3 Up 09:27:09 - 09:43:41 -1981
Parker 09:35:24 -26.1 Dark Down 76.9 171.2 Up 09:27:08 - 09:43:40 -2018
George/Scottsdale 09:35:13 -25.4 Dark Down 77.4 181.1 Up 09:26:57 - 09:43:29 -2026
Blythe 09:35:25 -26.7 Dark Down 77.3 169.6 Up 09:27:09 - 09:43:41 -2079
Wildwood 09:35:44 -27.8 Dark Down 75.9 154.9 Up 09:27:28 - 09:44:00 -2081
Idyllwild 09:35:35 -27.4 Dark Down 76.8 161.3 Up 09:27:19 - 09:43:51 -2095
Calipatria 09:35:29 -27.5 Dark Down 77.6 165.2 Up 09:27:13 - 09:43:45 -2145
Yuma 09:35:25 -27.5 Dark Down 78.2 168.6 Up 09:27:09 - 09:43:41 -2178

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, (2021/06/16 09:35UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 23.10 104
Tarazed        19:46:15.6 +10:36:48  2.7 10.52 132
PPM 109474     19:40:28.3 +20:28:36  6.2  1.52 125
PPM 109744     19:48:17.9 +21:22:34  8.5  0.52 126
PPM 109685     19:46:19.4 +20:55:36  8.8  0.20 126
523700         19:46:19.8 +21:07:44 16.3       126
Positions are for J2000

Event circumstances last updated at 2021/01/22 21:04:19 UT

Marc W. Buie, Southwest Research Institute

RECON