RECON: TNO occultation with 60558

Event between (60558) Echeclus and star GA1080:02075765 with event index number of 1116603

Geocentric closest approach at 2022/01/06 08:35:08 UTC

J2000 position of star is 06:29:43.6 +18:39:07
Equinox of date position of star is 06:30:58.5 +18:38:11
Stellar brightness G=9.9, use SENSEUP=2 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 122 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=19.6

[RECON map]
TNO is 11.1 AU from the Sun and 10.2 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 10.8 arcsec/hr.
The 1-sigma error in the time of the event is 18 seconds.
The 1-sigma cross-track error in the shadow position is 369 km.
The sky-plane scale is 7372.4 km/arcsec.

The TNO has an absolute magnitude Hv=9.2
Diameter=88.3 km assuming a 5% albedo -- 4.0 sec chord
Diameter=36.1 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 60558, (2022/01/06 08:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:21.9 +07:24:34  0.4 14.04 111
Alhena         06:38:59.0 +16:22:43  1.9  2.95 123
18Nu Gem       06:30:16.2 +20:11:46  4.1  1.57 121
PPM 122525     06:29:35.3 +18:27:11  8.5  0.39 121
PPM 122589     06:32:02.6 +18:33:34 10.1  0.25 122
60558          06:31:01.1 +18:38:09  9.9       122
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 25.8 km RECON observability=1.0 and success probability=63.0%
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 08:34:25 -61.6 Dark Down 55.4 210.6 Up 08:32:25 - 08:36:25 1483
Kelowna 08:34:25 -62.0 Dark Down 55.8 210.6 Up 08:32:25 - 08:36:25 1446
Peachland 08:34:25 -62.1 Dark Down 55.9 210.2 Up 08:32:25 - 08:36:25 1432
Summerland 08:34:25 -62.2 Dark Down 56.0 210.5 Up 08:32:25 - 08:36:25 1419
Penticton 08:34:24 -62.3 Dark Down 56.1 210.7 Up 08:32:24 - 08:36:24 1415
Oliver 08:34:24 -62.6 Dark Down 56.4 211.0 Up 08:32:24 - 08:36:24 1382
Anarchist Mountain Observatory 08:34:23 -62.8 Dark Down 56.5 211.4 Up 08:32:23 - 08:36:23 1369
Tonasket 08:34:23 -63.1 Dark Down 56.7 211.6 Up 08:32:23 - 08:36:23 1339
Okanogan 08:34:23 -63.4 Dark Down 57.1 211.6 Up 08:32:23 - 08:36:23 1306
Brewster 08:34:23 -63.7 Dark Down 57.4 211.5 Up 08:32:23 - 08:36:23 1278
Victoria 08:34:35 -63.8 Dark Down 58.1 205.2 Up 08:32:35 - 08:36:35 1276
Manson/Chelan 08:34:24 -64.0 Dark Down 57.7 211.1 Up 08:32:24 - 08:36:24 1254
Wenatchee 08:34:24 -64.5 Dark Down 58.2 211.2 Up 08:32:24 - 08:36:24 1207
Ellensburg 08:34:24 -64.9 Dark Down 58.6 211.1 Up 08:32:24 - 08:36:24 1166
Yakima 08:34:23 -65.3 Dark Down 58.9 211.5 Up 08:32:23 - 08:36:23 1127
Pasco 08:34:18 -65.4 Dark Down 58.7 214.2 Up 08:32:18 - 08:36:18 1113
Toppenish/White Swan 08:34:22 -65.5 Dark Down 59.1 211.9 Up 08:32:22 - 08:36:22 1108
PNWRO 08:34:17 -65.5 Dark Down 58.8 214.8 Up 08:32:17 - 08:36:17 1092
Goldendale 08:34:23 -66.1 Dark Down 59.7 211.7 Up 08:32:23 - 08:36:23 1050
The Dalles 08:34:24 -66.4 Dark Down 60.0 211.3 Up 08:32:24 - 08:36:24 1024
Maupin 08:34:23 -66.8 Dark Down 60.3 211.8 Up 08:32:23 - 08:36:23 985
Redmond 08:34:22 -67.7 Dark Down 61.1 212.5 Up 08:32:22 - 08:36:22 896
Sisters 08:34:24 -67.7 Dark Down 61.3 211.8 Up 08:32:24 - 08:36:24 893
Bend 08:34:23 -67.9 Dark Down 61.4 212.5 Up 08:32:23 - 08:36:23 873
Oregon Observatory 08:34:23 -68.1 Dark Down 61.6 212.4 Up 08:32:23 - 08:36:23 855
La Pine/Gilchrist 08:34:23 -68.3 Dark Down 61.8 212.5 Up 08:32:23 - 08:36:23 834
North Lake 08:34:20 -68.6 Dark Down 61.9 214.0 Up 08:32:20 - 08:36:20 799
Dunrhomin 08:33:23 -64.4 Dark Down 55.3 240.9 Up 08:31:23 - 08:35:23 763
Paisley 08:34:18 -69.1 Dark Down 62.2 215.3 Up 08:32:18 - 08:36:18 750
Chiloquin 08:34:23 -69.4 Dark Down 62.8 213.0 Up 08:32:23 - 08:36:23 720
Lakeview 08:34:17 -69.5 Dark Down 62.5 216.2 Up 08:32:17 - 08:36:17 702
Klamath Falls 08:34:22 -69.8 Dark Down 63.1 213.5 Up 08:32:22 - 08:36:22 687
Cedarville 08:34:16 -70.1 Dark Down 63.0 217.2 Up 08:32:16 - 08:36:16 639
Fall River/Burney 08:34:19 -70.8 Dark Down 63.9 215.6 Up 08:32:19 - 08:36:19 574
Susanville 08:34:16 -71.2 Dark Down 64.1 217.7 Up 08:32:16 - 08:36:16 521
Gimple 08:34:16 -71.6 Dark Down 64.4 217.7 Up 08:32:16 - 08:36:16 490
Greenville 08:34:17 -71.6 Dark Down 64.4 217.5 Up 08:32:17 - 08:36:17 489
Quincy 08:34:16 -71.8 Dark Down 64.6 217.8 Up 08:32:16 - 08:36:16 469
Portola 08:34:14 -71.8 Dark Down 64.5 218.8 Up 08:32:14 - 08:36:14 463
Reno 08:34:12 -71.8 Dark Down 64.4 220.4 Up 08:32:12 - 08:36:12 445
Carson City 08:34:11 -72.2 Dark Down 64.6 220.9 Up 08:32:11 - 08:36:11 409
Yerington 08:34:09 -72.2 Dark Down 64.4 222.3 Up 08:32:09 - 08:36:09 399
Gardnerville 08:34:11 -72.4 Dark Down 64.8 221.3 Up 08:32:11 - 08:36:11 385
Hawthorne 08:34:06 -72.4 Dark Down 64.5 223.9 Up 08:32:06 - 08:36:06 359
Tonopah 08:34:00 -72.3 Dark Down 64.1 227.1 Up 08:32:00 - 08:36:00 334
Lee Vining 08:34:07 -73.1 Dark Down 65.2 223.9 Up 08:32:07 - 08:36:07 295
Bishop 08:34:04 -73.3 Dark Down 65.2 226.1 Up 08:32:04 - 08:36:04 245
Beatty 08:33:57 -73.1 Dark Down 64.6 229.6 Up 08:31:57 - 08:35:57 223
Indian Springs 08:33:53 -72.8 Dark Down 64.1 231.9 Up 08:31:53 - 08:35:53 207
Henderson 08:33:49 -72.9 Dark Down 64.0 233.9 Up 08:31:49 - 08:35:49 164
Patrick 08:33:44 -72.7 Dark Down 63.6 236.6 Up 08:31:44 - 08:35:44 119
Kingman/Dolan Springs 08:33:45 -73.0 Dark Down 63.9 236.7 Up 08:31:45 - 08:35:45 92
Laughlin/Bullhead City 08:33:47 -73.3 Dark Down 64.2 236.0 Up 08:31:47 - 08:35:47 81
Mohave Valley 08:33:46 -73.5 Dark Down 64.4 236.4 Up 08:31:46 - 08:35:46 53
Lake Havasu City 08:33:45 -73.6 Dark Down 64.4 237.5 Up 08:31:45 - 08:35:45 16
CPSLO 08:34:10 -76.0 Dark Down 67.9 225.3 Up 08:32:10 - 08:36:10 -2
George/Scottsdale 08:33:34 -72.6 Dark Down 63.1 242.3 Up 08:31:34 - 08:35:34 -20
Parker 08:33:44 -73.9 Dark Down 64.6 238.2 Up 08:31:44 - 08:35:44 -20
Blythe 08:33:44 -74.4 Dark Down 65.1 238.7 Up 08:31:44 - 08:35:44 -79
Wildwood 08:34:00 -76.2 Dark Down 67.5 231.3 Up 08:32:00 - 08:36:00 -96
Idyllwild 08:33:53 -75.5 Dark Down 66.5 235.2 Up 08:31:53 - 08:35:53 -103
Calipatria 08:33:47 -75.3 Dark Down 66.0 238.2 Up 08:31:47 - 08:35:47 -147
Yuma 08:33:43 -75.0 Dark Down 65.6 240.4 Up 08:31:43 - 08:35:43 -176

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 60558, (2022/01/06 08:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.04 111
Alhena         06:37:42.8 +16:23:57  1.9  2.95 123
18Nu Gem       06:28:57.8 +20:12:43  4.1  1.57 121
PPM 122525     06:28:17.8 +18:28:07  8.5  0.39 121
PPM 122589     06:30:45.1 +18:34:34 10.1  0.25 122
60558          06:29:43.6 +18:39:07  9.9       121
Positions are for J2000

Event circumstances last updated at 2021/04/10 00:51:53 UT

Marc W. Buie, Southwest Research Institute

RECON