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 05:16:04.7 +18:52:14
Stellar brightness R=15.8, use SENSEUP=128
Star is 34 degrees from the moon. Moon is 12% illuminated.
TNO apparent brightness V=19.6

[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=9.6
Diameter=72.4 km assuming a 5% albedo -- 4.3 sec chord
Diameter=29.6 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 12:05:50 -10.1 CT Up 45.3 117.4 Up 12:03:34 - 12:08:05 4372
Tonasket 12:05:49 -10.2 CT Up 45.4 117.2 Up 12:03:34 - 12:08:05 4350
Okanogan 12:05:48 -10.5 CT Up 45.5 116.7 Up 12:03:32 - 12:08:03 4321
Brewster 12:05:46 -10.7 CT Up 45.5 116.3 Up 12:03:31 - 12:08:02 4299
Manson/Chelan 12:05:44 -11.1 CT Up 45.3 115.7 Up 12:03:29 - 12:08:00 4284
Entiat 12:05:43 -11.2 CT Up 45.4 115.4 Up 12:03:28 - 12:07:59 4265
Wenatchee 12:05:42 -11.4 CT Up 45.4 115.1 Up 12:03:26 - 12:07:57 4242
Ellensburg 12:05:40 -11.7 CT Up 45.4 114.4 Up 12:03:25 - 12:07:56 4207
Yakima 12:05:39 -11.9 CT Up 45.6 114.0 Up 12:03:23 - 12:07:54 4169
Toppenish/White Swan 12:05:39 -11.9 CT Up 45.8 114.0 Up 12:03:23 - 12:07:54 4146
Pasco 12:05:43 -11.2 CT Up 46.7 115.2 Up 12:03:27 - 12:07:58 4117
Goldendale 12:05:36 -12.5 AT Up 45.7 113.1 Up 12:03:20 - 12:07:51 4100
PNWRO 12:05:43 -11.2 CT Up 46.9 115.2 Up 12:03:27 - 12:07:58 4090
George/Umatilla 12:05:41 -11.5 CT Up 46.7 114.7 Up 12:03:26 - 12:07:57 4088
The Dalles 12:05:34 -12.8 AT Up 45.6 112.5 Up 12:03:19 - 12:07:50 4084
Maupin 12:05:33 -12.9 AT Up 45.8 112.2 Up 12:03:18 - 12:07:49 4043
Madras/Culver 12:05:31 -13.2 AT Up 46.0 111.6 Up 12:03:15 - 12:07:46 3991
Sisters 12:05:29 -13.7 AT Up 45.8 110.8 Up 12:03:13 - 12:07:44 3966
Redmond 12:05:30 -13.5 AT Up 46.1 111.2 Up 12:03:14 - 12:07:45 3958
Bend 12:05:29 -13.6 AT Up 46.1 110.9 Up 12:03:13 - 12:07:44 3939
Oregon Observatory 12:05:28 -13.8 AT Up 46.0 110.6 Up 12:03:12 - 12:07:43 3925
La Pine/Gilchrist 12:05:27 -14.0 AT Up 46.0 110.3 Up 12:03:11 - 12:07:42 3906
North Lake 12:05:28 -13.8 AT Up 46.6 110.4 Up 12:03:12 - 12:07:43 3855
Chiloquin 12:05:23 -14.7 AT Up 46.2 108.9 Up 12:03:07 - 12:07:38 3804
Paisley 12:05:27 -13.8 AT Up 47.1 110.2 Up 12:03:12 - 12:07:43 3796
Klamath Falls 12:05:22 -14.9 AT Up 46.3 108.6 Up 12:03:06 - 12:07:37 3769
Lakeview 12:05:27 -13.9 AT Up 47.4 109.9 Up 12:03:12 - 12:07:43 3743
Tulelake 12:05:22 -14.8 AT Up 46.6 108.6 Up 12:03:07 - 12:07:38 3738
Cedarville 12:05:26 -14.1 AT Up 47.7 109.4 Up 12:03:10 - 12:07:41 3676
Fall River/Burney 12:05:20 -15.2 AT Up 47.0 107.7 Up 12:03:05 - 12:07:36 3647
Susanville 12:05:21 -15.0 AT Up 47.7 107.8 Up 12:03:05 - 12:07:36 3573
Greenville 12:05:19 -15.3 AT Up 47.6 107.2 Up 12:03:04 - 12:07:35 3550
Gimple 12:05:20 -15.2 AT Up 47.6 107.3 Up 12:03:04 - 12:07:35 3549
Quincy 12:05:19 -15.4 AT Up 47.6 107.0 Up 12:03:03 - 12:07:34 3530
Portola 12:05:20 -15.1 AT Up 48.0 107.3 Up 12:03:05 - 12:07:36 3510
Reno 12:05:22 -14.8 AT Up 48.6 107.6 Up 12:03:06 - 12:07:37 3473
Carson City 12:05:21 -14.9 AT Up 48.7 107.2 Up 12:03:06 - 12:07:37 3437
Gardnerville 12:05:21 -15.0 AT Up 48.8 107.0 Up 12:03:05 - 12:07:36 3412
Yerington 12:05:23 -14.6 AT Up 49.2 107.6 Up 12:03:08 - 12:07:39 3407
Hawthorne 12:05:24 -14.4 AT Up 49.8 107.6 Up 12:03:08 - 12:07:39 3352
Niwot 12:06:25 -4.0 CT Up 58.6 124.7 Up 12:04:10 - 12:08:41 3350
Lee Vining 12:05:21 -15.0 AT Up 49.6 106.5 Up 12:03:05 - 12:07:36 3303
Tonopah 12:05:29 -13.6 AT Up 51.0 108.3 Up 12:03:13 - 12:07:44 3284
Bishop 12:05:22 -14.8 AT Up 50.3 106.4 Up 12:03:07 - 12:07:38 3231
Beatty 12:05:28 -13.7 AT Up 51.7 107.4 Up 12:03:12 - 12:07:43 3159
Lone Pine 12:05:22 -14.8 AT Up 50.7 105.8 Up 12:03:06 - 12:07:37 3148
Indian Springs 12:05:32 -13.1 AT Up 52.6 108.0 Up 12:03:16 - 12:07:47 3109
CPSLO 12:05:08 -17.3 AT Up 49.0 102.2 Up 12:02:53 - 12:07:24 3057
Henderson 12:05:34 -12.8 AT Up 53.3 107.9 Up 12:03:18 - 12:07:49 3044
Searchlight/Boulder City 12:05:33 -12.9 AT Up 53.5 107.3 Up 12:03:17 - 12:07:48 2984
Patrick 12:05:37 -12.1 AT Up 54.4 108.2 Up 12:03:22 - 12:07:53 2963
Laughlin/Bullhead City 12:05:34 -12.8 AT Up 53.9 107.2 Up 12:03:18 - 12:07:49 2948
Kingman/Dolan Springs 12:05:36 -12.4 AT Up 54.3 107.7 Up 12:03:21 - 12:07:52 2943
DCO 12:05:40 -11.7 CT Up 55.0 108.4 Up 12:03:25 - 12:07:56 2922
Mohave Valley 12:05:33 -12.9 AT Up 54.0 106.8 Up 12:03:18 - 12:07:49 2919
Wildwood 12:05:14 -16.3 AT Up 50.9 102.4 Up 12:02:58 - 12:07:29 2897
Lake Havasu City 12:05:34 -12.8 AT Up 54.3 106.5 Up 12:03:18 - 12:07:49 2874
Parker 12:05:33 -13.0 AT Up 54.4 106.1 Up 12:03:18 - 12:07:49 2837
Idyllwild 12:05:21 -15.0 AT Up 52.5 103.5 Up 12:03:06 - 12:07:37 2830
Blythe 12:05:31 -13.4 AT Up 54.3 105.1 Up 12:03:15 - 12:07:46 2786
Calipatria 12:05:25 -14.3 AT Up 53.7 103.6 Up 12:03:10 - 12:07:41 2748
Yuma 12:05:29 -13.8 AT Up 54.5 103.8 Up 12:03:13 - 12:07:44 2689

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 2017/12/06 19:14:20 UT

Marc W. Buie, Southwest Research Institute

RECON