RECON: TNO occultation with 60558

Event between (60558) Echeclus and star UC4-545-013650 with event index number of 209695

Geocentric closest approach at 2019/08/27 12:08:44 UTC

J2000 position of star is 05:15:01.5 +18:51:05
Equinox of date position of star is 05:16:03.7 +18:52:13
Stellar brightness R=15.8, use SENSEUP=128
Star is 34 degrees from the moon. Moon is 12% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 9.0 AU from the Sun and 9.2 AU from the Earth.
The TNO is moving 16.8 km/sec on the sky relative to the star, or, 9.1 arcsec/hr.
The 1-sigma error in the time of the event is 21 seconds.
The 1-sigma cross-track error in the shadow position is 333 km.
The sky-plane scale is 6659.0 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 4.5 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 60558, (2019/08/27 12:09UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.0 +16:32:50  0.8  9.60  43
Alnath         05:27:32.2 +28:37:20  1.6 10.09  31
PPM 120839     05:21:27.9 +19:35:48  6.5  1.44  32
PPM 120767     05:16:53.4 +19:45:02  8.3  0.89  34
PPM 120768     05:16:58.4 +18:39:32  9.0  0.28  34
60558          05:16:10.7 +18:52:21 15.8        34
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 96.8 km RECON observability=0.2 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)
Oroville 12:05:49 -10.1 CT Up 45.3 117.4 Up 12:03:34 - 12:08:05 4419
Tonasket 12:05:49 -10.2 CT Up 45.4 117.2 Up 12:03:34 - 12:08:05 4397
Okanogan 12:05:47 -10.5 CT Up 45.5 116.7 Up 12:03:32 - 12:08:03 4368
Brewster 12:05:46 -10.7 CT Up 45.5 116.3 Up 12:03:30 - 12:08:01 4346
Manson/Chelan 12:05:44 -11.1 CT Up 45.3 115.7 Up 12:03:29 - 12:08:00 4331
Entiat 12:05:43 -11.2 CT Up 45.4 115.4 Up 12:03:28 - 12:07:59 4312
Wenatchee 12:05:42 -11.4 CT Up 45.4 115.1 Up 12:03:26 - 12:07:57 4289
Ellensburg 12:05:40 -11.7 CT Up 45.4 114.4 Up 12:03:24 - 12:07:55 4254
Yakima 12:05:39 -11.9 CT Up 45.6 114.0 Up 12:03:23 - 12:07:54 4216
Toppenish/White Swan 12:05:39 -11.9 CT Up 45.8 114.0 Up 12:03:23 - 12:07:54 4193
Pasco 12:05:43 -11.2 CT Up 46.7 115.2 Up 12:03:27 - 12:07:58 4164
Goldendale 12:05:36 -12.5 AT Up 45.7 113.1 Up 12:03:20 - 12:07:51 4147
PNWRO 12:05:43 -11.2 CT Up 46.9 115.2 Up 12:03:27 - 12:07:58 4138
George/Umatilla 12:05:41 -11.5 CT Up 46.7 114.7 Up 12:03:26 - 12:07:57 4135
The Dalles 12:05:34 -12.8 AT Up 45.6 112.5 Up 12:03:18 - 12:07:49 4131
Maupin 12:05:33 -12.9 AT Up 45.8 112.2 Up 12:03:17 - 12:07:48 4090
Madras/Culver 12:05:31 -13.2 AT Up 46.0 111.6 Up 12:03:15 - 12:07:46 4038
Sisters 12:05:28 -13.7 AT Up 45.8 110.8 Up 12:03:13 - 12:07:44 4013
Redmond 12:05:30 -13.5 AT Up 46.1 111.2 Up 12:03:14 - 12:07:45 4005
Bend 12:05:28 -13.6 AT Up 46.1 110.9 Up 12:03:13 - 12:07:44 3986
Oregon Observatory 12:05:28 -13.8 AT Up 46.0 110.6 Up 12:03:12 - 12:07:43 3972
La Pine/Gilchrist 12:05:27 -14.0 AT Up 46.1 110.3 Up 12:03:12 - 12:07:43 3953
North Lake 12:05:28 -13.8 AT Up 46.6 110.4 Up 12:03:12 - 12:07:43 3902
Chiloquin 12:05:23 -14.7 AT Up 46.2 108.9 Up 12:03:07 - 12:07:38 3850
Paisley 12:05:27 -13.8 AT Up 47.1 110.2 Up 12:03:12 - 12:07:43 3843
Klamath Falls 12:05:22 -14.9 AT Up 46.3 108.6 Up 12:03:06 - 12:07:37 3816
Lakeview 12:05:27 -13.9 AT Up 47.4 109.9 Up 12:03:12 - 12:07:43 3790
Tulelake 12:05:22 -14.8 AT Up 46.6 108.6 Up 12:03:07 - 12:07:38 3785
Cedarville 12:05:26 -14.1 AT Up 47.7 109.4 Up 12:03:10 - 12:07:41 3723
Fall River/Burney 12:05:20 -15.2 AT Up 47.0 107.7 Up 12:03:05 - 12:07:36 3694
Susanville 12:05:21 -15.0 AT Up 47.7 107.8 Up 12:03:05 - 12:07:36 3620
Greenville 12:05:19 -15.3 AT Up 47.6 107.2 Up 12:03:04 - 12:07:35 3597
Gimple 12:05:20 -15.2 AT Up 47.6 107.3 Up 12:03:04 - 12:07:35 3596
Quincy 12:05:19 -15.4 AT Up 47.6 107.0 Up 12:03:03 - 12:07:34 3577
Portola 12:05:20 -15.1 AT Up 48.0 107.3 Up 12:03:05 - 12:07:36 3557
Reno 12:05:22 -14.8 AT Up 48.6 107.6 Up 12:03:06 - 12:07:37 3520
Carson City 12:05:21 -14.9 AT Up 48.7 107.2 Up 12:03:05 - 12:07:36 3484
Gardnerville 12:05:21 -15.0 AT Up 48.8 107.0 Up 12:03:05 - 12:07:36 3458
Yerington 12:05:23 -14.6 AT Up 49.2 107.6 Up 12:03:08 - 12:07:39 3454
Niwot 12:06:25 -4.0 CT Up 58.6 124.7 Up 12:04:10 - 12:08:41 3399
Hawthorne 12:05:24 -14.4 AT Up 49.8 107.6 Up 12:03:08 - 12:07:39 3399
Lee Vining 12:05:21 -15.0 AT Up 49.6 106.5 Up 12:03:05 - 12:07:36 3350
Tonopah 12:05:29 -13.6 AT Up 51.0 108.3 Up 12:03:13 - 12:07:44 3331
Bishop 12:05:22 -14.8 AT Up 50.3 106.4 Up 12:03:07 - 12:07:38 3278
Beatty 12:05:28 -13.7 AT Up 51.7 107.4 Up 12:03:12 - 12:07:43 3205
Lone Pine 12:05:22 -14.8 AT Up 50.7 105.8 Up 12:03:06 - 12:07:37 3194
Indian Springs 12:05:32 -13.1 AT Up 52.6 108.0 Up 12:03:16 - 12:07:47 3156
CPSLO 12:05:08 -17.3 AT Up 49.0 102.2 Up 12:02:53 - 12:07:24 3103
Henderson 12:05:34 -12.8 AT Up 53.3 107.9 Up 12:03:19 - 12:07:50 3091
Searchlight/Boulder City 12:05:33 -12.9 AT Up 53.5 107.3 Up 12:03:18 - 12:07:49 3031
Patrick 12:05:38 -12.1 AT Up 54.4 108.2 Up 12:03:22 - 12:07:53 3010
Laughlin/Bullhead City 12:05:34 -12.8 AT Up 53.9 107.2 Up 12:03:19 - 12:07:50 2995
Kingman/Dolan Springs 12:05:36 -12.4 AT Up 54.3 107.7 Up 12:03:21 - 12:07:52 2990
DCO 12:05:40 -11.7 CT Up 55.0 108.4 Up 12:03:25 - 12:07:56 2969
Mohave Valley 12:05:34 -12.9 AT Up 54.0 106.8 Up 12:03:18 - 12:07:49 2966
Wildwood 12:05:14 -16.3 AT Up 50.9 102.4 Up 12:02:59 - 12:07:30 2944
Lake Havasu City 12:05:34 -12.8 AT Up 54.3 106.5 Up 12:03:18 - 12:07:49 2921
Parker 12:05:33 -13.0 AT Up 54.4 106.1 Up 12:03:18 - 12:07:49 2883
Idyllwild 12:05:22 -15.0 AT Up 52.5 103.5 Up 12:03:06 - 12:07:37 2877
Blythe 12:05:31 -13.4 AT Up 54.3 105.1 Up 12:03:15 - 12:07:46 2833
Calipatria 12:05:26 -14.3 AT Up 53.7 103.6 Up 12:03:10 - 12:07:41 2795
Yuma 12:05:29 -13.8 AT Up 54.5 103.8 Up 12:03:13 - 12:07:44 2736

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, (2019/08/27 12:09UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  9.60  43
Alnath         05:26:17.5 +28:36:24  1.6 10.09  31
PPM 120839     05:20:18.3 +19:34:41  6.5  1.44  32
PPM 120767     05:15:43.8 +19:43:48  8.3  0.89  34
PPM 120768     05:15:49.2 +18:38:18  9.0  0.28  34
60558          05:15:01.5 +18:51:05 15.8        34
Positions are for J2000

Event circumstances last updated at 2017/09/01 17:03:58 UT

Marc W. Buie, Southwest Research Institute

RECON