RECON: TNO occultation with 504555

Event between (504555) 08SO266 and star UC4-441-003358 with event index number of 228443

Geocentric closest approach at 2018/10/04 11:36:59 UTC

J2000 position of star is 02:34:40.2 -01:56:04
Equinox of date position of star is 02:35:34.8 -01:51:23
Stellar brightness R=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 175 seconds.
The 1-sigma cross-track error in the shadow position is 2056 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 11:37UT)
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         02:35:37.4 -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 5.1 sigma about the mid-time.
The median site spacing is 20.5 km RECON observability=1.0 and success probability=15.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:33:53 -24.6 Dark Up 33.5 214.8 Up 11:18:53 - 11:48:53 -1690
Tonasket 11:33:53 -24.7 Dark Up 33.7 214.9 Up 11:18:53 - 11:48:53 -1709
Okanogan 11:33:53 -24.9 Dark Up 34.0 214.9 Up 11:18:53 - 11:48:53 -1731
Brewster 11:33:54 -25.1 Dark Up 34.3 214.8 Up 11:18:54 - 11:48:54 -1747
Manson/Chelan 11:33:55 -25.4 Dark Up 34.6 214.5 Up 11:18:55 - 11:48:55 -1751
Entiat 11:33:55 -25.6 Dark Up 34.8 214.5 Up 11:18:55 - 11:48:55 -1767
Wenatchee 11:33:56 -25.7 Dark Up 35.1 214.5 Up 11:18:56 - 11:48:56 -1784
Ellensburg 11:33:56 -26.0 Dark Up 35.5 214.4 Up 11:18:56 - 11:48:56 -1811
Yakima 11:33:56 -26.2 Dark Up 35.8 214.5 Up 11:18:56 - 11:48:56 -1844
Toppenish/White Swan 11:33:56 -26.2 Dark Up 35.9 214.8 Up 11:18:56 - 11:48:56 -1867
Goldendale 11:33:57 -26.7 Dark Up 36.6 214.5 Up 11:18:57 - 11:48:57 -1898
The Dalles 11:33:58 -27.0 Dark Up 36.9 214.2 Up 11:18:58 - 11:48:58 -1904
Pasco 11:33:52 -25.4 Dark Up 35.5 216.3 Up 11:18:52 - 11:48:52 -1921
George/Umatilla 11:33:53 -25.7 Dark Up 35.9 216.2 Up 11:18:53 - 11:48:53 -1942
Maupin 11:33:58 -27.1 Dark Up 37.2 214.5 Up 11:18:58 - 11:48:58 -1943
PNWRO 11:33:52 -25.4 Dark Up 35.6 216.6 Up 11:18:52 - 11:48:52 -1950
Madras/Culver 11:33:58 -27.3 Dark Up 37.7 214.7 Up 11:18:58 - 11:48:58 -1987
Sisters 11:33:59 -27.8 Dark Up 38.1 214.3 Up 11:18:59 - 11:48:59 -1999
Redmond 11:33:59 -27.5 Dark Up 38.0 214.8 Up 11:18:59 - 11:48:59 -2015
Bend 11:33:59 -27.7 Dark Up 38.2 214.8 Up 11:18:59 - 11:48:59 -2028
Oregon Observatory 11:33:59 -27.8 Dark Up 38.4 214.7 Up 11:18:59 - 11:48:59 -2038
La Pine/Gilchrist 11:33:59 -28.0 Dark Up 38.6 214.7 Up 11:18:59 - 11:48:59 -2053
North Lake 11:33:58 -27.7 Dark Up 38.7 215.6 Up 11:18:58 - 11:48:58 -2113
Chiloquin 11:34:01 -28.6 Dark Up 39.7 214.8 Up 11:19:01 - 11:49:01 -2135
Klamath Falls 11:34:01 -28.7 Dark Up 39.9 215.1 Up 11:19:01 - 11:49:01 -2167
Paisley 11:33:57 -27.7 Dark Up 39.0 216.3 Up 11:18:57 - 11:48:57 -2173
Tulelake 11:34:00 -28.6 Dark Up 40.0 215.6 Up 11:19:00 - 11:49:00 -2202
Lakeview 11:33:57 -27.7 Dark Up 39.3 216.7 Up 11:18:57 - 11:48:57 -2224
Fall River/Burney 11:34:00 -28.9 Dark Up 40.7 216.1 Up 11:19:00 - 11:49:00 -2283
Cedarville 11:33:56 -27.8 Dark Up 39.8 217.3 Up 11:18:56 - 11:48:56 -2288
Susanville 11:33:59 -28.6 Dark Up 40.9 217.3 Up 11:18:59 - 11:48:59 -2367
Greenville 11:33:59 -28.9 Dark Up 41.2 217.1 Up 11:18:59 - 11:48:59 -2380
Gimple 11:33:59 -28.8 Dark Up 41.2 217.2 Up 11:18:59 - 11:48:59 -2383
Quincy 11:33:59 -28.9 Dark Up 41.4 217.2 Up 11:18:59 - 11:48:59 -2398
Portola 11:33:58 -28.6 Dark Up 41.3 217.8 Up 11:18:58 - 11:48:58 -2427
Reno 11:33:56 -28.3 Dark Up 41.2 218.7 Up 11:18:56 - 11:48:56 -2476
Carson City 11:33:57 -28.4 Dark Up 41.4 219.0 Up 11:18:57 - 11:48:57 -2509
Gardnerville 11:33:57 -28.4 Dark Up 41.6 219.1 Up 11:18:57 - 11:48:57 -2533
Yerington 11:33:55 -28.0 Dark Up 41.3 219.8 Up 11:18:55 - 11:48:55 -2551
Hawthorne 11:33:54 -27.7 Dark Up 41.4 220.7 Up 11:18:54 - 11:48:54 -2613
Lee Vining 11:33:56 -28.3 Dark Up 42.0 220.4 Up 11:18:56 - 11:48:56 -2645
Tonopah 11:33:50 -26.8 Dark Up 41.0 222.5 Up 11:18:50 - 11:48:50 -2710
Bishop 11:33:54 -27.9 Dark Up 42.1 221.6 Up 11:18:54 - 11:48:54 -2728
Lone Pine 11:33:53 -27.9 Dark Up 42.5 222.5 Up 11:18:53 - 11:48:53 -2811
CPSLO 11:34:02 -30.2 Dark Up 44.9 220.3 Up 11:19:02 - 11:49:02 -2825
Beatty 11:33:49 -26.8 Dark Up 41.6 223.7 Up 11:18:49 - 11:48:49 -2834
Indian Springs 11:33:46 -26.1 Dark Up 41.2 225.1 Up 11:18:46 - 11:48:46 -2907
Niwot 11:33:18 -17.3 AT Up 32.7 233.5 Up 11:18:18 - 11:48:18 -2948
Henderson 11:33:45 -25.6 Dark Up 41.2 226.2 Up 11:18:45 - 11:48:45 -2984
Wildwood 11:33:56 -29.0 Dark Up 44.6 223.5 Up 11:18:56 - 11:48:56 -3022
Searchlight/Boulder City 11:33:45 -25.7 Dark Up 41.6 226.6 Up 11:18:45 - 11:48:45 -3040
Laughlin/Bullhead City 11:33:44 -25.5 Dark Up 41.6 227.2 Up 11:18:44 - 11:48:44 -3082
Patrick 11:33:41 -24.9 Dark Up 41.0 227.8 Up 11:18:41 - 11:48:41 -3086
Kingman/Dolan Springs 11:33:42 -25.1 Dark Up 41.2 227.7 Up 11:18:42 - 11:48:42 -3100
Mohave Valley 11:33:44 -25.6 Dark Up 41.7 227.4 Up 11:18:44 - 11:48:44 -3108
Idyllwild 11:33:51 -27.6 Dark Up 43.8 225.8 Up 11:18:51 - 11:48:51 -3132
DCO 11:33:40 -24.4 Dark Up 40.7 228.7 Up 11:18:40 - 11:48:40 -3142
Lake Havasu City 11:33:44 -25.5 Dark Up 41.9 227.9 Up 11:18:44 - 11:48:44 -3155
Parker 11:33:44 -25.5 Dark Up 42.1 228.2 Up 11:18:44 - 11:48:44 -3190
Blythe 11:33:45 -25.9 Dark Up 42.6 228.2 Up 11:18:45 - 11:48:45 -3228
Calipatria 11:33:48 -26.8 Dark Up 43.5 227.5 Up 11:18:48 - 11:48:48 -3238
Yuma 11:33:45 -26.1 Dark Up 43.2 228.8 Up 11:18:45 - 11:48:45 -3315

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 11:37UT)
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 -01:56:04 16.4        93
Positions are for J2000

Event circumstances last updated at 2017/12/05 18:58:45 UT

Marc W. Buie, Southwest Research Institute

RECON