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 08:35:12 UTC

J2000 position of star is 06:29:43.6 +18:39:07
Equinox of date position of star is 06:30:54.3 +18:38:14
Stellar brightness G=9.9, use SENSEUP=2
Star is 122 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=20.4

[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=10.0
Diameter=75.9 km assuming a 5% albedo -- 2.7 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.1 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 21.9 km RECON observability=1.0 and success probability=71.2%
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 08:34:29 -61.6 Dark Down 55.4 210.6 Up 08:32:28 - 08:36:30 1360
Peachland 08:34:29 -62.1 Dark Down 55.9 210.3 Up 08:32:28 - 08:36:30 1308
Summerland 08:34:29 -62.2 Dark Down 56.0 210.5 Up 08:32:28 - 08:36:30 1296
Penticton 08:34:28 -62.3 Dark Down 56.1 210.8 Up 08:32:27 - 08:36:29 1291
Oliver 08:34:28 -62.6 Dark Down 56.4 211.0 Up 08:32:27 - 08:36:29 1258
Anarchist Mountain Observatory 08:34:27 -62.8 Dark Down 56.4 211.5 Up 08:32:26 - 08:36:28 1245
Tonasket 08:34:27 -63.1 Dark Down 56.7 211.6 Up 08:32:26 - 08:36:28 1216
Okanogan 08:34:27 -63.4 Dark Down 57.1 211.6 Up 08:32:26 - 08:36:28 1182
Brewster 08:34:27 -63.7 Dark Down 57.4 211.5 Up 08:32:26 - 08:36:28 1154
Victoria 08:34:39 -63.8 Dark Down 58.1 205.2 Up 08:32:38 - 08:36:40 1152
Manson/Chelan 08:34:28 -64.0 Dark Down 57.7 211.1 Up 08:32:27 - 08:36:29 1130
Entiat 08:34:28 -64.2 Dark Down 57.9 211.1 Up 08:32:27 - 08:36:29 1109
Wenatchee 08:34:28 -64.5 Dark Down 58.1 211.2 Up 08:32:27 - 08:36:29 1084
Ellensburg 08:34:28 -64.9 Dark Down 58.6 211.2 Up 08:32:27 - 08:36:29 1042
Yakima 08:34:28 -65.3 Dark Down 58.9 211.5 Up 08:32:27 - 08:36:29 1003
Pasco 08:34:22 -65.4 Dark Down 58.7 214.2 Up 08:32:21 - 08:36:23 989
Toppenish/White Swan 08:34:27 -65.5 Dark Down 59.1 212.0 Up 08:32:26 - 08:36:28 984
PNWRO 08:34:21 -65.5 Dark Down 58.8 214.8 Up 08:32:20 - 08:36:22 969
Goldendale 08:34:27 -66.1 Dark Down 59.7 211.7 Up 08:32:26 - 08:36:28 926
The Dalles 08:34:28 -66.4 Dark Down 60.0 211.3 Up 08:32:27 - 08:36:29 900
Maupin 08:34:27 -66.8 Dark Down 60.3 211.9 Up 08:32:26 - 08:36:28 861
Redmond 08:34:27 -67.7 Dark Down 61.1 212.5 Up 08:32:26 - 08:36:28 772
Sisters 08:34:28 -67.7 Dark Down 61.3 211.8 Up 08:32:27 - 08:36:29 770
Bend 08:34:27 -67.9 Dark Down 61.4 212.5 Up 08:32:26 - 08:36:28 750
Oregon Observatory 08:34:27 -68.1 Dark Down 61.6 212.4 Up 08:32:26 - 08:36:28 731
La Pine/Gilchrist 08:34:27 -68.3 Dark Down 61.8 212.5 Up 08:32:26 - 08:36:28 710
North Lake 08:34:24 -68.6 Dark Down 61.9 214.1 Up 08:32:23 - 08:36:25 676
Niwot 08:33:26 -64.5 Dark Down 55.4 241.1 Up 08:31:25 - 08:35:27 626
Paisley 08:34:22 -69.0 Dark Down 62.2 215.3 Up 08:32:21 - 08:36:23 626
SwRI 08:33:27 -64.6 Dark Down 55.5 241.1 Up 08:31:26 - 08:35:28 614
Lakeview 08:34:21 -69.5 Dark Down 62.5 216.2 Up 08:32:20 - 08:36:22 578
Klamath Falls 08:34:26 -69.7 Dark Down 63.1 213.5 Up 08:32:25 - 08:36:27 563
Cedarville 08:34:20 -70.1 Dark Down 63.0 217.3 Up 08:32:19 - 08:36:21 516
Fall River/Burney 08:34:23 -70.8 Dark Down 63.9 215.6 Up 08:32:22 - 08:36:24 451
Susanville 08:34:20 -71.2 Dark Down 64.1 217.7 Up 08:32:19 - 08:36:21 398
Gimple 08:34:20 -71.6 Dark Down 64.4 217.7 Up 08:32:19 - 08:36:21 367
Greenville 08:34:21 -71.6 Dark Down 64.4 217.5 Up 08:32:20 - 08:36:22 366
Quincy 08:34:20 -71.8 Dark Down 64.6 217.8 Up 08:32:19 - 08:36:21 345
Portola 08:34:19 -71.8 Dark Down 64.5 218.9 Up 08:32:18 - 08:36:20 339
Reno 08:34:16 -71.8 Dark Down 64.4 220.4 Up 08:32:15 - 08:36:17 322
Carson City 08:34:15 -72.2 Dark Down 64.6 220.9 Up 08:32:14 - 08:36:16 286
Yerington 08:34:13 -72.1 Dark Down 64.4 222.4 Up 08:32:12 - 08:36:14 275
Gardnerville 08:34:15 -72.4 Dark Down 64.8 221.4 Up 08:32:14 - 08:36:16 262
Hawthorne 08:34:10 -72.4 Dark Down 64.5 224.0 Up 08:32:09 - 08:36:11 236
Tonopah 08:34:04 -72.3 Dark Down 64.0 227.1 Up 08:32:03 - 08:36:05 210
Lee Vining 08:34:11 -73.1 Dark Down 65.2 223.9 Up 08:32:10 - 08:36:12 171
Bishop 08:34:08 -73.3 Dark Down 65.2 226.1 Up 08:32:07 - 08:36:09 121
Beatty 08:34:01 -73.0 Dark Down 64.6 229.7 Up 08:32:00 - 08:36:02 99
Indian Springs 08:33:57 -72.8 Dark Down 64.1 232.0 Up 08:31:56 - 08:35:58 83
Henderson 08:33:53 -72.9 Dark Down 64.0 233.9 Up 08:31:52 - 08:35:54 40
Patrick 08:33:48 -72.7 Dark Down 63.6 236.6 Up 08:31:47 - 08:35:49 -5
Searchlight/Boulder City 08:33:52 -73.3 Dark Down 64.3 235.0 Up 08:31:51 - 08:35:53 -18
DCO 08:33:45 -72.5 Dark Down 63.3 238.2 Up 08:31:44 - 08:35:46 -24
Kingman/Dolan Springs 08:33:49 -73.0 Dark Down 63.9 236.7 Up 08:31:48 - 08:35:50 -31
Laughlin/Bullhead City 08:33:51 -73.3 Dark Down 64.2 236.0 Up 08:31:50 - 08:35:52 -43
Mohave Valley 08:33:50 -73.5 Dark Down 64.4 236.5 Up 08:31:49 - 08:35:51 -71
Lake Havasu City 08:33:49 -73.6 Dark Down 64.4 237.5 Up 08:31:48 - 08:35:50 -107
CPSLO 08:34:14 -76.0 Dark Down 67.9 225.3 Up 08:32:13 - 08:36:15 -125
George/Scottsdale 08:33:38 -72.6 Dark Down 63.1 242.3 Up 08:31:37 - 08:35:39 -143
Parker 08:33:48 -73.9 Dark Down 64.6 238.2 Up 08:31:47 - 08:35:49 -143
Blythe 08:33:49 -74.4 Dark Down 65.1 238.7 Up 08:31:48 - 08:35:50 -203
Wildwood 08:34:05 -76.2 Dark Down 67.5 231.4 Up 08:32:04 - 08:36:06 -220
Idyllwild 08:33:57 -75.5 Dark Down 66.5 235.2 Up 08:31:56 - 08:35:58 -227
Calipatria 08:33:52 -75.3 Dark Down 66.0 238.2 Up 08:31:51 - 08:35:53 -270
Yuma 08:33:47 -75.0 Dark Down 65.6 240.4 Up 08:31:46 - 08:35:48 -300

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 2020/01/30 21:04:02 UT

Marc W. Buie, Southwest Research Institute

RECON