RECON: TNO occultation with 504555

Event between (504555) 08SO266 and star GA0880:00211235 with event index number of 228443

Geocentric closest approach at 2018/10/04 11:40:45 UTC

J2000 position of star is 02:34:40.2 -01:56:03
Equinox of date position of star is 02:35:36.3 -01:51:16
Stellar brightness G=16.4, use SENSEUP=128
Star is 93 degrees from the moon. Moon is 27% illuminated.
TNO apparent brightness V=21.5

[RECON map]
TNO is 33.6 AU from the Sun and 32.7 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 195 seconds.
The 1-sigma cross-track error in the shadow position is 2845 km.
The sky-plane scale is 23744.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 15.5 sec chord
Diameter=141.6 km assuming a 30% albedo -- 6.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 504555, (2018/10/04 11:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:59.9 +16:32:44  0.8 35.15  59
68Omi Cet      02:20:17.7 -02:53:36  2.0  3.97  97
75 Cet         02:33:06.8 -00:57:11  6.0  1.10  93
PPM 175123     02:31:29.4 -01:35:21  8.2  1.07  94
PPM 175145     02:36:46.8 -01:45:00  9.3  0.31  93
504555         02:35:37.3 -01:51:10 16.4        93
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 4.6 sigma about the mid-time.
The median site spacing is 21.8 km RECON observability=1.0 and success probability=12.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 11:37:38 -23.9 Dark Up 32.7 215.5 Up 11:22:38 - 11:52:38 3990
Oroville 11:37:38 -24.0 Dark Up 33.1 215.9 Up 11:22:38 - 11:52:38 3937
Tonasket 11:37:38 -24.1 Dark Up 33.3 216.0 Up 11:22:38 - 11:52:38 3918
Okanogan 11:37:38 -24.3 Dark Up 33.6 215.9 Up 11:22:38 - 11:52:38 3895
Brewster 11:37:39 -24.6 Dark Up 33.9 215.8 Up 11:22:39 - 11:52:39 3880
Manson/Chelan 11:37:40 -24.9 Dark Up 34.3 215.5 Up 11:22:40 - 11:52:40 3875
Entiat 11:37:40 -25.0 Dark Up 34.5 215.5 Up 11:22:40 - 11:52:40 3859
Wenatchee 11:37:40 -25.2 Dark Up 34.7 215.5 Up 11:22:40 - 11:52:40 3842
Ellensburg 11:37:41 -25.5 Dark Up 35.1 215.4 Up 11:22:41 - 11:52:41 3815
Yakima 11:37:41 -25.6 Dark Up 35.5 215.6 Up 11:22:41 - 11:52:41 3782
Toppenish/White Swan 11:37:41 -25.6 Dark Up 35.6 215.9 Up 11:22:41 - 11:52:41 3758
Goldendale 11:37:42 -26.1 Dark Up 36.2 215.6 Up 11:22:42 - 11:52:42 3726
The Dalles 11:37:43 -26.4 Dark Up 36.5 215.3 Up 11:22:43 - 11:52:43 3720
Pasco 11:37:37 -24.8 Dark Up 35.2 217.3 Up 11:22:37 - 11:52:37 3704
George/Umatilla 11:37:38 -25.1 Dark Up 35.5 217.2 Up 11:22:38 - 11:52:38 3683
Maupin 11:37:43 -26.5 Dark Up 36.8 215.6 Up 11:22:43 - 11:52:43 3681
PNWRO 11:37:37 -24.8 Dark Up 35.3 217.7 Up 11:22:37 - 11:52:37 3675
Madras/Culver 11:37:43 -26.7 Dark Up 37.3 215.8 Up 11:22:43 - 11:52:43 3637
Sisters 11:37:44 -27.1 Dark Up 37.7 215.4 Up 11:22:44 - 11:52:44 3625
Redmond 11:37:43 -26.9 Dark Up 37.6 215.9 Up 11:22:43 - 11:52:43 3608
Bend 11:37:44 -27.1 Dark Up 37.8 215.8 Up 11:22:44 - 11:52:44 3595
Oregon Observatory 11:37:44 -27.2 Dark Up 38.0 215.8 Up 11:22:44 - 11:52:44 3585
La Pine/Gilchrist 11:37:44 -27.3 Dark Up 38.2 215.8 Up 11:22:44 - 11:52:44 3570
North Lake 11:37:43 -27.1 Dark Up 38.3 216.7 Up 11:22:43 - 11:52:43 3511
Chiloquin 11:37:46 -28.0 Dark Up 39.3 215.9 Up 11:22:46 - 11:52:46 3488
Klamath Falls 11:37:46 -28.0 Dark Up 39.5 216.2 Up 11:22:46 - 11:52:46 3455
Paisley 11:37:42 -27.0 Dark Up 38.6 217.4 Up 11:22:42 - 11:52:42 3450
Tulelake 11:37:45 -27.9 Dark Up 39.6 216.7 Up 11:22:45 - 11:52:45 3421
Lakeview 11:37:41 -27.1 Dark Up 38.9 217.8 Up 11:22:41 - 11:52:41 3399
Fall River/Burney 11:37:45 -28.2 Dark Up 40.3 217.2 Up 11:22:45 - 11:52:45 3338
Cedarville 11:37:41 -27.2 Dark Up 39.3 218.4 Up 11:22:41 - 11:52:41 3335
Susanville 11:37:44 -27.9 Dark Up 40.4 218.4 Up 11:22:44 - 11:52:44 3255
Greenville 11:37:44 -28.2 Dark Up 40.8 218.2 Up 11:22:44 - 11:52:44 3242
Gimple 11:37:44 -28.1 Dark Up 40.8 218.3 Up 11:22:44 - 11:52:44 3238
Quincy 11:37:44 -28.3 Dark Up 40.9 218.3 Up 11:22:44 - 11:52:44 3224
Portola 11:37:43 -28.0 Dark Up 40.8 218.9 Up 11:22:43 - 11:52:43 3194
Reno 11:37:41 -27.6 Dark Up 40.7 219.8 Up 11:22:41 - 11:52:41 3145
Carson City 11:37:41 -27.7 Dark Up 41.0 220.0 Up 11:22:41 - 11:52:41 3112
Gardnerville 11:37:41 -27.7 Dark Up 41.1 220.2 Up 11:22:41 - 11:52:41 3089
Yerington 11:37:40 -27.3 Dark Up 40.8 220.9 Up 11:22:40 - 11:52:40 3071
Hawthorne 11:37:38 -27.0 Dark Up 40.9 221.7 Up 11:22:38 - 11:52:38 3008
Lee Vining 11:37:40 -27.6 Dark Up 41.6 221.5 Up 11:22:40 - 11:52:40 2976
Tonopah 11:37:34 -26.1 Dark Up 40.5 223.6 Up 11:22:34 - 11:52:34 2911
Bishop 11:37:38 -27.2 Dark Up 41.6 222.7 Up 11:22:38 - 11:52:38 2893
Lone Pine 11:37:38 -27.1 Dark Up 42.0 223.5 Up 11:22:38 - 11:52:38 2810
CPSLO 11:37:47 -29.5 Dark Up 44.4 221.4 Up 11:22:47 - 11:52:47 2794
Beatty 11:37:34 -26.1 Dark Up 41.1 224.8 Up 11:22:34 - 11:52:34 2787
Indian Springs 11:37:31 -25.3 Dark Up 40.7 226.1 Up 11:22:31 - 11:52:31 2715
Niwot 11:37:03 -16.6 AT Up 32.2 234.4 Up 11:22:03 - 11:52:03 2679
Henderson 11:37:29 -24.9 Dark Up 40.6 227.2 Up 11:22:29 - 11:52:29 2638
Wildwood 11:37:41 -28.2 Dark Up 44.1 224.5 Up 11:22:41 - 11:52:41 2598
Searchlight/Boulder City 11:37:30 -25.0 Dark Up 41.0 227.6 Up 11:22:30 - 11:52:30 2581
Laughlin/Bullhead City 11:37:29 -24.8 Dark Up 41.0 228.2 Up 11:22:29 - 11:52:29 2540
Patrick 11:37:26 -24.2 Dark Up 40.4 228.7 Up 11:22:26 - 11:52:26 2536
Kingman/Dolan Springs 11:37:27 -24.4 Dark Up 40.7 228.7 Up 11:22:27 - 11:52:27 2522
Mohave Valley 11:37:29 -24.8 Dark Up 41.2 228.4 Up 11:22:29 - 11:52:29 2513
Idyllwild 11:37:36 -26.8 Dark Up 43.2 226.9 Up 11:22:36 - 11:52:36 2488
DCO 11:37:25 -23.7 Dark Up 40.2 229.7 Up 11:22:25 - 11:52:25 2479
Lake Havasu City 11:37:28 -24.7 Dark Up 41.3 228.9 Up 11:22:28 - 11:52:28 2465
Parker 11:37:29 -24.8 Dark Up 41.5 229.1 Up 11:22:29 - 11:52:29 2431
Blythe 11:37:30 -25.1 Dark Up 42.0 229.2 Up 11:22:30 - 11:52:30 2392
Calipatria 11:37:33 -26.0 Dark Up 42.9 228.6 Up 11:22:33 - 11:52:33 2382
Yuma 11:37:30 -25.4 Dark Up 42.6 229.8 Up 11:22:30 - 11:52:30 2305

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 504555, (2018/10/04 11:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 35.15  59
68Omi Cet      02:19:20.8 -02:58:44  2.0  3.97  97
75 Cet         02:32:09.4 -01:02:07  6.0  1.10  93
PPM 175123     02:30:32.2 -01:40:18  8.2  1.07  94
PPM 175145     02:35:49.6 -01:49:52  9.3  0.31  93
504555         02:34:40.2 -01:56:03 16.4        93
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:28:43 UT

Marc W. Buie, Southwest Research Institute

RECON