RECON: TNO occultation with 60558

Event between (60558) Echeclus and star GA1080:00831598 with event index number of 225280

Geocentric closest approach at 2019/11/29 10:50:25 UTC

J2000 position of star is 05:07:38.5 +18:03:21
Equinox of date position of star is 05:08:43.1 +18:04:44
Stellar brightness G=14.2, use SENSEUP=64
Star is 155 degrees from the moon. Moon is 9% illuminated.
TNO apparent brightness V=19.1

[RECON map]
TNO is 9.2 AU from the Sun and 8.2 AU from the Earth.
The TNO is moving 20.4 km/sec on the sky relative to the star, or, 12.3 arcsec/hr.
The 1-sigma error in the time of the event is 15 seconds.
The 1-sigma cross-track error in the shadow position is 299 km.
The sky-plane scale is 5980.3 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.7 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 60558, (2019/11/29 10:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.9 +16:32:52  0.8  7.73 147
Alnath         05:27:33.1 +28:37:21  1.6 11.38 160
104 Tau        05:08:37.7 +18:40:13  5.6  0.59 155
PPM 120566     05:05:59.8 +18:16:48  7.7  0.70 154
PPM 120607     05:07:51.3 +17:45:24  9.4  0.39 154
PPM 120641     05:09:57.7 +18:18:32 10.4  0.36 155
60558          05:08:48.2 +18:04:51 14.2       155
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 25.3 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 10:48:02 -44.6 Dark Down 48.6 232.6 Up 10:46:16 - 10:49:48 5290
Oroville 10:48:00 -44.8 Dark Down 48.9 233.3 Up 10:46:14 - 10:49:46 5233
Tonasket 10:48:00 -44.8 Dark Down 49.0 233.5 Up 10:46:14 - 10:49:46 5211
Okanogan 10:48:00 -45.1 Dark Down 49.3 233.7 Up 10:46:14 - 10:49:46 5178
Brewster 10:48:00 -45.3 Dark Down 49.6 233.7 Up 10:46:14 - 10:49:46 5150
Manson/Chelan 10:48:01 -45.6 Dark Down 49.9 233.4 Up 10:46:15 - 10:49:47 5128
Entiat 10:48:00 -45.7 Dark Down 50.1 233.6 Up 10:46:14 - 10:49:46 5106
Wenatchee 10:48:00 -45.8 Dark Down 50.3 233.7 Up 10:46:14 - 10:49:46 5081
Ellensburg 10:48:00 -46.1 Dark Down 50.6 233.8 Up 10:46:14 - 10:49:46 5040
Yakima 10:48:00 -46.3 Dark Down 50.9 234.2 Up 10:46:14 - 10:49:46 5000
Toppenish/White Swan 10:47:59 -46.2 Dark Down 50.9 234.6 Up 10:46:13 - 10:49:45 4979
Pasco 10:47:55 -45.5 Dark Down 50.3 236.2 Up 10:46:09 - 10:49:41 4975
PNWRO 10:47:54 -45.4 Dark Down 50.3 236.8 Up 10:46:08 - 10:49:40 4952
George/Umatilla 10:47:55 -45.7 Dark Down 50.6 236.3 Up 10:46:09 - 10:49:41 4940
Goldendale 10:48:00 -46.7 Dark Down 51.5 234.7 Up 10:46:14 - 10:49:46 4923
The Dalles 10:48:00 -47.0 Dark Down 51.8 234.4 Up 10:46:14 - 10:49:46 4899
Maupin 10:48:00 -47.1 Dark Down 52.0 235.0 Up 10:46:14 - 10:49:46 4858
Madras/Culver 10:47:59 -47.3 Dark Down 52.3 235.5 Up 10:46:13 - 10:49:45 4803
Sisters 10:48:00 -47.7 Dark Down 52.8 235.3 Up 10:46:14 - 10:49:46 4767
Redmond 10:47:59 -47.4 Dark Down 52.6 235.9 Up 10:46:13 - 10:49:45 4767
Bend 10:47:59 -47.6 Dark Down 52.8 235.9 Up 10:46:13 - 10:49:45 4745
Oregon Observatory 10:47:59 -47.7 Dark Down 52.9 235.9 Up 10:46:13 - 10:49:45 4727
La Pine/Gilchrist 10:47:59 -47.8 Dark Down 53.1 236.1 Up 10:46:13 - 10:49:45 4706
North Lake 10:47:56 -47.6 Dark Down 53.0 237.3 Up 10:46:10 - 10:49:42 4665
Paisley 10:47:54 -47.5 Dark Down 53.0 238.3 Up 10:46:08 - 10:49:40 4611
Chiloquin 10:47:59 -48.4 Dark Down 53.9 236.9 Up 10:46:13 - 10:49:45 4591
Lakeview 10:47:53 -47.5 Dark Down 53.2 239.1 Up 10:46:07 - 10:49:39 4561
Klamath Falls 10:47:58 -48.5 Dark Down 54.1 237.4 Up 10:46:12 - 10:49:44 4557
Tulelake 10:47:56 -48.3 Dark Down 54.0 238.1 Up 10:46:10 - 10:49:42 4531
Cedarville 10:47:51 -47.5 Dark Down 53.4 240.1 Up 10:46:05 - 10:49:37 4495
Niwot 10:47:01 -36.6 Dark Down 43.5 256.0 Up 10:45:15 - 10:48:47 4491
Fall River/Burney 10:47:55 -48.5 Dark Down 54.4 239.2 Up 10:46:09 - 10:49:41 4439
Susanville 10:47:51 -48.1 Dark Down 54.3 240.9 Up 10:46:05 - 10:49:37 4378
Gimple 10:47:52 -48.3 Dark Down 54.6 241.0 Up 10:46:06 - 10:49:38 4348
Greenville 10:47:52 -48.4 Dark Down 54.6 240.9 Up 10:46:06 - 10:49:38 4348
Quincy 10:47:52 -48.4 Dark Down 54.7 241.1 Up 10:46:06 - 10:49:38 4327
Portola 10:47:50 -48.1 Dark Down 54.4 241.8 Up 10:46:04 - 10:49:36 4317
Reno 10:47:47 -47.7 Dark Down 54.1 242.9 Up 10:46:01 - 10:49:33 4293
Carson City 10:47:47 -47.8 Dark Down 54.3 243.3 Up 10:46:01 - 10:49:33 4256
Yerington 10:47:45 -47.3 Dark Down 53.9 244.3 Up 10:45:59 - 10:49:31 4240
Gardnerville 10:47:46 -47.8 Dark Down 54.4 243.7 Up 10:46:00 - 10:49:32 4231
Hawthorne 10:47:42 -47.0 Dark Down 53.8 245.4 Up 10:45:56 - 10:49:28 4195
Tonopah 10:47:36 -46.0 Dark Down 53.0 247.4 Up 10:45:50 - 10:49:22 4157
Lee Vining 10:47:43 -47.5 Dark Down 54.3 245.6 Up 10:45:57 - 10:49:29 4133
Bishop 10:47:39 -47.0 Dark Down 54.1 247.1 Up 10:45:53 - 10:49:25 4075
Beatty 10:47:33 -45.8 Dark Down 53.1 249.3 Up 10:45:47 - 10:49:19 4039
Indian Springs 10:47:29 -45.0 Dark Down 52.4 250.7 Up 10:45:43 - 10:49:15 4014
Lone Pine 10:47:37 -46.8 Dark Down 54.1 248.4 Up 10:45:51 - 10:49:23 3998
Henderson 10:47:25 -44.5 Dark Down 52.0 252.0 Up 10:45:39 - 10:49:11 3964
Patrick 10:47:21 -43.6 Dark Down 51.3 253.7 Up 10:45:35 - 10:49:07 3908
Searchlight/Boulder City 10:47:24 -44.5 Dark Down 52.1 252.8 Up 10:45:38 - 10:49:10 3904
Kingman/Dolan Springs 10:47:21 -43.8 Dark Down 51.6 253.8 Up 10:45:35 - 10:49:07 3883
DCO 10:47:18 -43.1 Dark Down 50.9 254.7 Up 10:45:32 - 10:49:04 3882
Laughlin/Bullhead City 10:47:23 -44.2 Dark Down 52.0 253.4 Up 10:45:37 - 10:49:09 3875
Mohave Valley 10:47:23 -44.2 Dark Down 52.0 253.8 Up 10:45:37 - 10:49:09 3847
CPSLO 10:47:46 -49.1 Dark Down 56.5 247.5 Up 10:46:00 - 10:49:32 3843
Lake Havasu City 10:47:21 -44.0 Dark Down 52.0 254.5 Up 10:45:35 - 10:49:07 3807
Parker 10:47:20 -44.0 Dark Down 52.0 254.9 Up 10:45:34 - 10:49:06 3769
Wildwood 10:47:36 -47.6 Dark Down 55.4 251.2 Up 10:45:50 - 10:49:22 3728
Blythe 10:47:21 -44.3 Dark Down 52.4 255.3 Up 10:45:35 - 10:49:07 3711
Idyllwild 10:47:29 -46.0 Dark Down 54.0 253.4 Up 10:45:43 - 10:49:15 3705
Calipatria 10:47:24 -45.1 Dark Down 53.3 255.2 Up 10:45:38 - 10:49:10 3650
Yuma 10:47:20 -44.4 Dark Down 52.7 256.5 Up 10:45:34 - 10:49:06 3612

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, (2019/11/29 10:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  7.73 147
Alnath         05:26:17.5 +28:36:23  1.6 11.38 160
104 Tau        05:07:27.7 +18:38:43  5.6  0.59 155
PPM 120566     05:04:50.0 +18:15:14  7.7  0.70 154
PPM 120607     05:06:41.8 +17:43:53  9.4  0.39 154
PPM 120641     05:08:47.9 +18:17:04 10.4  0.36 155
60558          05:07:38.5 +18:03:21 14.2       155
Positions are for J2000

Event circumstances last updated at 2018/06/12 07:51:47 UT

Marc W. Buie, Southwest Research Institute

RECON