RECON: TNO occultation with 60558

Event between (60558) Echeclus and star GA1080:00898366 with event index number of 209695

Geocentric closest approach at 2019/08/27 12:08:07 UTC

J2000 position of star is 05:15:01.5 +18:51:05
Equinox of date position of star is 05:16:06.5 +18:52:16
Stellar brightness G=15.7, 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 12:08UT)
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 15.7        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 67.5 km RECON observability=0.2 and success probability=13.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 12:05:08 -10.0 CT Up 44.8 117.6 Up 12:02:55 - 12:07:20 2114
Oroville 12:05:06 -10.2 CT Up 45.2 117.2 Up 12:02:54 - 12:07:19 2057
Tonasket 12:05:06 -10.3 CT Up 45.3 117.0 Up 12:02:53 - 12:07:18 2036
Okanogan 12:05:04 -10.6 CT Up 45.4 116.5 Up 12:02:52 - 12:07:17 2007
Brewster 12:05:02 -10.8 CT Up 45.3 116.1 Up 12:02:50 - 12:07:15 1984
Manson/Chelan 12:05:01 -11.2 CT Up 45.2 115.5 Up 12:02:48 - 12:07:13 1970
Entiat 12:05:00 -11.3 CT Up 45.3 115.2 Up 12:02:47 - 12:07:12 1950
Wenatchee 12:04:58 -11.5 CT Up 45.3 114.9 Up 12:02:46 - 12:07:11 1928
Ellensburg 12:04:57 -11.8 CT Up 45.3 114.3 Up 12:02:44 - 12:07:09 1893
Yakima 12:04:55 -12.0 AT Up 45.5 113.9 Up 12:02:43 - 12:07:08 1855
Toppenish/White Swan 12:04:55 -12.0 AT Up 45.7 113.8 Up 12:02:42 - 12:07:07 1832
Pasco 12:04:59 -11.3 CT Up 46.5 115.0 Up 12:02:47 - 12:07:12 1803
Goldendale 12:04:52 -12.6 AT Up 45.6 112.9 Up 12:02:39 - 12:07:04 1786
PNWRO 12:04:59 -11.3 CT Up 46.8 115.0 Up 12:02:47 - 12:07:12 1776
George/Umatilla 12:04:58 -11.6 CT Up 46.5 114.5 Up 12:02:45 - 12:07:10 1774
The Dalles 12:04:50 -12.9 AT Up 45.5 112.3 Up 12:02:38 - 12:07:03 1770
Maupin 12:04:49 -13.1 AT Up 45.7 112.0 Up 12:02:37 - 12:07:02 1729
Madras/Culver 12:04:47 -13.4 AT Up 45.9 111.4 Up 12:02:35 - 12:07:00 1677
Sisters 12:04:45 -13.8 AT Up 45.7 110.7 Up 12:02:32 - 12:06:57 1652
Redmond 12:04:46 -13.6 AT Up 46.0 111.0 Up 12:02:34 - 12:06:59 1644
Bend 12:04:45 -13.8 AT Up 45.9 110.7 Up 12:02:33 - 12:06:58 1625
Oregon Observatory 12:04:44 -13.9 AT Up 45.9 110.4 Up 12:02:31 - 12:06:56 1611
La Pine/Gilchrist 12:04:43 -14.1 AT Up 45.9 110.1 Up 12:02:31 - 12:06:56 1592
North Lake 12:04:44 -13.9 AT Up 46.5 110.3 Up 12:02:32 - 12:06:57 1540
Chiloquin 12:04:39 -14.9 AT Up 46.0 108.7 Up 12:02:26 - 12:06:51 1490
Paisley 12:04:44 -13.9 AT Up 46.9 110.1 Up 12:02:31 - 12:06:56 1481
Klamath Falls 12:04:38 -15.0 AT Up 46.2 108.4 Up 12:02:26 - 12:06:51 1455
Lakeview 12:04:43 -14.0 AT Up 47.2 109.7 Up 12:02:31 - 12:06:56 1429
Tulelake 12:04:38 -14.9 AT Up 46.5 108.4 Up 12:02:26 - 12:06:51 1424
Cedarville 12:04:42 -14.2 AT Up 47.6 109.2 Up 12:02:30 - 12:06:55 1362
Fall River/Burney 12:04:36 -15.3 AT Up 46.8 107.6 Up 12:02:24 - 12:06:49 1333
Susanville 12:04:37 -15.1 AT Up 47.6 107.6 Up 12:02:25 - 12:06:50 1259
Greenville 12:04:36 -15.4 AT Up 47.4 107.0 Up 12:02:23 - 12:06:48 1237
Gimple 12:04:36 -15.4 AT Up 47.5 107.1 Up 12:02:23 - 12:06:48 1235
Quincy 12:04:35 -15.5 AT Up 47.5 106.8 Up 12:02:22 - 12:06:47 1216
Portola 12:04:37 -15.2 AT Up 47.9 107.1 Up 12:02:24 - 12:06:49 1196
Reno 12:04:38 -14.9 AT Up 48.4 107.4 Up 12:02:26 - 12:06:51 1159
Carson City 12:04:37 -15.1 AT Up 48.6 107.1 Up 12:02:25 - 12:06:50 1123
Gardnerville 12:04:37 -15.1 AT Up 48.7 106.8 Up 12:02:24 - 12:06:49 1098
Yerington 12:04:39 -14.7 AT Up 49.1 107.4 Up 12:02:27 - 12:06:52 1093
Hawthorne 12:04:40 -14.5 AT Up 49.6 107.4 Up 12:02:28 - 12:06:53 1038
Niwot 12:05:42 -4.1 CT Up 58.5 124.5 Up 12:03:29 - 12:07:54 1035
Lee Vining 12:04:37 -15.1 AT Up 49.4 106.3 Up 12:02:24 - 12:06:49 989
Tonopah 12:04:45 -13.7 AT Up 50.8 108.2 Up 12:02:32 - 12:06:57 969
Bishop 12:04:38 -14.9 AT Up 50.1 106.3 Up 12:02:26 - 12:06:51 917
Beatty 12:04:44 -13.9 AT Up 51.5 107.2 Up 12:02:31 - 12:06:56 844
Lone Pine 12:04:38 -15.0 AT Up 50.6 105.7 Up 12:02:26 - 12:06:51 834
Indian Springs 12:04:48 -13.2 AT Up 52.5 107.8 Up 12:02:35 - 12:07:00 795
CPSLO 12:04:24 -17.5 AT Up 48.8 102.0 Up 12:02:12 - 12:06:37 743
Henderson 12:04:50 -12.9 AT Up 53.2 107.8 Up 12:02:38 - 12:07:03 730
Searchlight/Boulder City 12:04:49 -13.1 AT Up 53.4 107.1 Up 12:02:37 - 12:07:02 669
Patrick 12:04:54 -12.3 AT Up 54.2 108.0 Up 12:02:41 - 12:07:06 649
Laughlin/Bullhead City 12:04:50 -12.9 AT Up 53.8 107.0 Up 12:02:38 - 12:07:03 634
Kingman/Dolan Springs 12:04:52 -12.5 AT Up 54.2 107.5 Up 12:02:40 - 12:07:05 628
DCO 12:04:56 -11.8 CT Up 54.9 108.3 Up 12:02:44 - 12:07:09 607
Mohave Valley 12:04:49 -13.0 AT Up 53.8 106.7 Up 12:02:37 - 12:07:02 605
Wildwood 12:04:30 -16.5 AT Up 50.8 102.2 Up 12:02:18 - 12:06:43 583
Lake Havasu City 12:04:50 -13.0 AT Up 54.2 106.4 Up 12:02:37 - 12:07:02 560
Parker 12:04:49 -13.1 AT Up 54.3 105.9 Up 12:02:37 - 12:07:02 522
Idyllwild 12:04:37 -15.1 AT Up 52.4 103.3 Up 12:02:25 - 12:06:50 516
Blythe 12:04:47 -13.5 AT Up 54.2 104.9 Up 12:02:34 - 12:06:59 472
Calipatria 12:04:42 -14.5 AT Up 53.5 103.5 Up 12:02:29 - 12:06:54 434
Yuma 12:04:45 -13.9 AT Up 54.4 103.7 Up 12:02:32 - 12:06:57 375

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 12:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  9.60  43
Alnath         05:26:17.5 +28:36:23  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 15.7        34
Positions are for J2000

Event circumstances last updated at 2018/06/12 07:41:55 UT

Marc W. Buie, Southwest Research Institute

RECON