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 06:30:54.6 +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=69.8%
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 08:34:29 -61.6 Dark Down 55.4 210.6 Up 08:32:28 - 08:36:30 1383
Kelowna 08:34:29 -62.0 Dark Down 55.8 210.7 Up 08:32:28 - 08:36:30 1345
Peachland 08:34:30 -62.1 Dark Down 55.9 210.3 Up 08:32:29 - 08:36:31 1332
Summerland 08:34:29 -62.2 Dark Down 56.0 210.5 Up 08:32:28 - 08:36:30 1319
Penticton 08:34:29 -62.3 Dark Down 56.1 210.8 Up 08:32:28 - 08:36:30 1314
Oliver 08:34:28 -62.6 Dark Down 56.4 211.0 Up 08:32:27 - 08:36:29 1282
Anarchist Mountain Observatory 08:34:27 -62.8 Dark Down 56.4 211.5 Up 08:32:26 - 08:36:28 1269
Tonasket 08:34:27 -63.1 Dark Down 56.7 211.6 Up 08:32:26 - 08:36:28 1239
Okanogan 08:34:27 -63.4 Dark Down 57.1 211.6 Up 08:32:26 - 08:36:28 1206
Brewster 08:34:27 -63.7 Dark Down 57.4 211.5 Up 08:32:26 - 08:36:28 1178
Victoria 08:34:39 -63.8 Dark Down 58.1 205.2 Up 08:32:38 - 08:36:40 1176
Manson/Chelan 08:34:28 -64.0 Dark Down 57.7 211.1 Up 08:32:27 - 08:36:29 1154
Entiat 08:34:28 -64.2 Dark Down 57.9 211.1 Up 08:32:27 - 08:36:29 1132
Wenatchee 08:34:28 -64.5 Dark Down 58.1 211.2 Up 08:32:27 - 08:36:29 1107
Ellensburg 08:34:28 -64.9 Dark Down 58.6 211.2 Up 08:32:27 - 08:36:29 1065
Yakima 08:34:28 -65.3 Dark Down 58.9 211.5 Up 08:32:27 - 08:36:29 1026
Pasco 08:34:23 -65.4 Dark Down 58.7 214.2 Up 08:32:22 - 08:36:24 1012
Toppenish/White Swan 08:34:27 -65.5 Dark Down 59.1 212.0 Up 08:32:26 - 08:36:28 1008
PNWRO 08:34:21 -65.5 Dark Down 58.8 214.8 Up 08:32:20 - 08:36:22 992
Goldendale 08:34:27 -66.1 Dark Down 59.7 211.7 Up 08:32:26 - 08:36:28 950
The Dalles 08:34:28 -66.4 Dark Down 60.0 211.3 Up 08:32:27 - 08:36:29 923
Maupin 08:34:28 -66.8 Dark Down 60.3 211.9 Up 08:32:27 - 08:36:29 884
Redmond 08:34:27 -67.7 Dark Down 61.1 212.5 Up 08:32:26 - 08:36:28 796
Sisters 08:34:28 -67.7 Dark Down 61.3 211.8 Up 08:32:27 - 08:36:29 793
Bend 08:34:27 -67.9 Dark Down 61.4 212.5 Up 08:32:26 - 08:36:28 773
Oregon Observatory 08:34:27 -68.1 Dark Down 61.6 212.4 Up 08:32:26 - 08:36:28 754
La Pine/Gilchrist 08:34:27 -68.3 Dark Down 61.8 212.5 Up 08:32:26 - 08:36:28 734
North Lake 08:34:24 -68.6 Dark Down 61.9 214.1 Up 08:32:23 - 08:36:25 699
Niwot 08:33:27 -64.5 Dark Down 55.4 241.1 Up 08:31:26 - 08:35:28 649
Paisley 08:34:23 -69.0 Dark Down 62.2 215.3 Up 08:32:22 - 08:36:24 649
SwRI 08:33:27 -64.6 Dark Down 55.5 241.1 Up 08:31:26 - 08:35:28 637
Lakeview 08:34:21 -69.5 Dark Down 62.5 216.2 Up 08:32:20 - 08:36:22 602
Klamath Falls 08:34:26 -69.7 Dark Down 63.1 213.5 Up 08:32:25 - 08:36:27 587
Cedarville 08:34:20 -70.1 Dark Down 63.0 217.3 Up 08:32:19 - 08:36:21 539
Fall River/Burney 08:34:24 -70.8 Dark Down 63.9 215.6 Up 08:32:23 - 08:36:25 474
Susanville 08:34:20 -71.2 Dark Down 64.1 217.7 Up 08:32:19 - 08:36:21 421
Gimple 08:34:20 -71.6 Dark Down 64.4 217.7 Up 08:32:19 - 08:36:21 390
Greenville 08:34:21 -71.6 Dark Down 64.4 217.5 Up 08:32:20 - 08:36:22 389
Quincy 08:34:21 -71.8 Dark Down 64.6 217.8 Up 08:32:20 - 08:36:22 369
Portola 08:34:19 -71.8 Dark Down 64.5 218.9 Up 08:32:18 - 08:36:20 363
Reno 08:34:16 -71.8 Dark Down 64.4 220.4 Up 08:32:15 - 08:36:17 345
Carson City 08:34:15 -72.2 Dark Down 64.6 220.9 Up 08:32:14 - 08:36:16 309
Yerington 08:34:13 -72.1 Dark Down 64.4 222.4 Up 08:32:12 - 08:36:14 298
Gardnerville 08:34:15 -72.4 Dark Down 64.8 221.4 Up 08:32:14 - 08:36:16 285
Hawthorne 08:34:10 -72.4 Dark Down 64.5 224.0 Up 08:32:09 - 08:36:11 259
Tonopah 08:34:05 -72.3 Dark Down 64.0 227.1 Up 08:32:04 - 08:36:06 233
Lee Vining 08:34:11 -73.1 Dark Down 65.2 223.9 Up 08:32:10 - 08:36:12 195
Bishop 08:34:08 -73.3 Dark Down 65.2 226.1 Up 08:32:07 - 08:36:09 144
Beatty 08:34:01 -73.0 Dark Down 64.6 229.7 Up 08:32:00 - 08:36:02 122
Indian Springs 08:33:57 -72.8 Dark Down 64.1 232.0 Up 08:31:56 - 08:35:58 106
Henderson 08:33:54 -72.9 Dark Down 64.0 233.9 Up 08:31:53 - 08:35:55 63
Patrick 08:33:49 -72.7 Dark Down 63.6 236.6 Up 08:31:48 - 08:35:50 18
Searchlight/Boulder City 08:33:53 -73.3 Dark Down 64.3 235.0 Up 08:31:52 - 08:35:54 6
DCO 08:33:45 -72.5 Dark Down 63.3 238.2 Up 08:31:44 - 08:35:46 -1
Kingman/Dolan Springs 08:33:49 -73.0 Dark Down 63.9 236.7 Up 08:31:48 - 08:35:50 -8
Laughlin/Bullhead City 08:33:51 -73.3 Dark Down 64.2 236.0 Up 08:31:50 - 08:35:52 -19
Mohave Valley 08:33:50 -73.5 Dark Down 64.4 236.5 Up 08:31:49 - 08:35:51 -47
Lake Havasu City 08:33:49 -73.6 Dark Down 64.4 237.5 Up 08:31:48 - 08:35:50 -84
CPSLO 08:34:14 -76.0 Dark Down 67.9 225.3 Up 08:32:13 - 08:36:15 -102
George/Scottsdale 08:33:39 -72.6 Dark Down 63.1 242.3 Up 08:31:38 - 08:35:40 -120
Parker 08:33:48 -73.9 Dark Down 64.6 238.2 Up 08:31:47 - 08:35:49 -120
Blythe 08:33:49 -74.4 Dark Down 65.1 238.7 Up 08:31:48 - 08:35:50 -180
Wildwood 08:34:05 -76.2 Dark Down 67.5 231.4 Up 08:32:04 - 08:36:06 -197
Idyllwild 08:33:57 -75.5 Dark Down 66.5 235.2 Up 08:31:56 - 08:35:58 -203
Calipatria 08:33:52 -75.3 Dark Down 66.0 238.2 Up 08:31:51 - 08:35:53 -247
Yuma 08:33:48 -75.0 Dark Down 65.6 240.4 Up 08:31:47 - 08:35:49 -277

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 2020/02/24 22:25:09 UT

Marc W. Buie, Southwest Research Institute

RECON