RECON: TNO occultation with 504555

Event between (504555) 08SO266 and star UC4-440-003286 with event index number of 228456

Geocentric closest approach at 2019/11/28 04:30:00 UTC

J2000 position of star is 02:37:36.9 -02:04:24
Equinox of date position of star is 02:38:31.5 -01:59:47
Stellar brightness R=13.2, use SENSEUP=32
Star is 129 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 33.9 AU from the Sun and 33.0 AU from the Earth.
The TNO is moving 21.2 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 201 seconds.
The 1-sigma cross-track error in the shadow position is 1366 km.
The sky-plane scale is 23969.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 16.3 sec chord
Diameter=141.6 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 504555, (2019/11/28 04:30UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.9 +16:32:52  0.8 34.61 164
68Omi Cet      02:20:21.2 -02:53:17  2.0  4.65 125
81 Cet         02:38:42.1 -03:18:40  5.6  1.32 129
PPM 184872     02:40:20.3 -01:59:17  8.2  0.43 130
PPM 184825     02:37:55.8 -01:59:23  9.6  0.17 129
504555         02:38:37.5 -01:59:16 13.2       129
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 4.5 sigma about the mid-time.
The median site spacing is 18.0 km RECON observability=1.0 and success probability=25.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:30:43 -42.6 Dark Down 34.8 149.9 Up 04:15:43 - 04:45:43 211
Tonasket 04:30:44 -42.7 Dark Down 35.0 149.8 Up 04:15:44 - 04:45:44 196
Okanogan 04:30:45 -42.7 Dark Down 35.2 149.5 Up 04:15:45 - 04:45:45 176
Brewster 04:30:46 -42.7 Dark Down 35.4 149.2 Up 04:15:46 - 04:45:46 161
Manson/Chelan 04:30:48 -42.5 Dark Down 35.5 148.7 Up 04:15:48 - 04:45:48 151
Entiat 04:30:48 -42.5 Dark Down 35.6 148.5 Up 04:15:48 - 04:45:48 137
Wenatchee 04:30:49 -42.5 Dark Down 35.8 148.3 Up 04:15:49 - 04:45:49 122
Ellensburg 04:30:51 -42.5 Dark Down 36.1 147.9 Up 04:15:51 - 04:45:51 96
Yakima 04:30:52 -42.6 Dark Down 36.4 147.7 Up 04:15:52 - 04:45:52 69
Toppenish/White Swan 04:30:52 -42.8 Dark Down 36.7 147.8 Up 04:15:52 - 04:45:52 53
Pasco 04:30:48 -43.6 Dark Down 37.2 149.3 Up 04:15:48 - 04:45:48 32
Goldendale 04:30:54 -42.6 Dark Down 37.0 147.1 Up 04:15:54 - 04:45:54 20
PNWRO 04:30:48 -43.9 Dark Down 37.5 149.4 Up 04:15:48 - 04:45:48 13
George/Umatilla 04:30:49 -43.6 Dark Down 37.4 148.9 Up 04:15:49 - 04:45:49 12
The Dalles 04:30:56 -42.4 Dark Down 37.0 146.6 Up 04:15:56 - 04:45:56 10
Maupin 04:30:57 -42.6 Dark Down 37.4 146.6 Up 04:15:57 - 04:45:57 -22
Madras/Culver 04:30:58 -42.7 Dark Down 37.9 146.3 Up 04:15:58 - 04:45:58 -59
Sisters 04:31:00 -42.5 Dark Down 38.0 145.6 Up 04:16:00 - 04:46:00 -78
Redmond 04:30:59 -42.7 Dark Down 38.1 146.1 Up 04:15:59 - 04:45:59 -84
Bend 04:31:00 -42.7 Dark Down 38.3 145.8 Up 04:16:00 - 04:46:00 -97
Oregon Observatory 04:31:01 -42.6 Dark Down 38.4 145.6 Up 04:16:01 - 04:46:01 -108
La Pine/Gilchrist 04:31:01 -42.6 Dark Down 38.5 145.5 Up 04:16:01 - 04:46:01 -122
North Lake 04:31:00 -43.2 Dark Down 39.1 146.0 Up 04:16:00 - 04:46:00 -160
Chiloquin 04:31:05 -42.6 Dark Down 39.3 144.5 Up 04:16:05 - 04:46:05 -198
Paisley 04:31:00 -43.5 Dark Down 39.7 146.1 Up 04:16:00 - 04:46:00 -204
Klamath Falls 04:31:05 -42.7 Dark Down 39.6 144.5 Up 04:16:05 - 04:46:05 -224
Lakeview 04:31:01 -43.8 Dark Down 40.2 146.1 Up 04:16:01 - 04:46:01 -243
Tulelake 04:31:05 -43.0 Dark Down 39.9 144.7 Up 04:16:05 - 04:46:05 -247
Cedarville 04:31:01 -44.0 Dark Down 40.8 146.0 Up 04:16:01 - 04:46:01 -293
Fall River/Burney 04:31:06 -43.2 Dark Down 40.7 144.4 Up 04:16:06 - 04:46:06 -316
Susanville 04:31:05 -43.9 Dark Down 41.6 144.9 Up 04:16:05 - 04:46:05 -372
Greenville 04:31:07 -43.7 Dark Down 41.7 144.4 Up 04:16:07 - 04:46:07 -389
Gimple 04:31:06 -43.7 Dark Down 41.7 144.5 Up 04:16:06 - 04:46:06 -391
Quincy 04:31:07 -43.7 Dark Down 41.8 144.3 Up 04:16:07 - 04:46:07 -405
Portola 04:31:06 -44.1 Dark Down 42.1 144.8 Up 04:16:06 - 04:46:06 -420
Reno 04:31:04 -44.6 Dark Down 42.6 145.5 Up 04:16:04 - 04:46:04 -448
Carson City 04:31:04 -44.7 Dark Down 42.9 145.3 Up 04:16:04 - 04:46:04 -476
Gardnerville 04:31:05 -44.8 Dark Down 43.2 145.2 Up 04:16:05 - 04:46:05 -496
Yerington 04:31:03 -45.2 Dark Down 43.4 146.0 Up 04:16:03 - 04:46:03 -499
Hawthorne 04:31:01 -45.7 Dark Down 44.0 146.4 Up 04:16:01 - 04:46:01 -542
Lee Vining 04:31:04 -45.4 Dark Down 44.2 145.5 Up 04:16:04 - 04:46:04 -580
Niwot 04:30:08 -55.1 Dark Down 46.8 165.0 Up 04:15:08 - 04:45:08 -586
Tonopah 04:30:57 -46.8 Dark Down 45.0 147.9 Up 04:15:57 - 04:45:57 -596
Bishop 04:31:03 -46.0 Dark Down 45.1 146.1 Up 04:16:03 - 04:46:03 -637
Beatty 04:30:57 -47.4 Dark Down 46.2 147.9 Up 04:15:57 - 04:45:57 -694
Lone Pine 04:31:03 -46.4 Dark Down 45.8 146.1 Up 04:16:03 - 04:46:03 -703
Indian Springs 04:30:54 -48.3 Dark Down 46.9 149.1 Up 04:15:54 - 04:45:54 -735
CPSLO 04:31:10 -44.5 Dark Down 45.7 142.0 Up 04:16:10 - 04:46:10 -787
Henderson 04:30:52 -48.9 Dark Down 47.6 149.7 Up 04:15:52 - 04:45:52 -788
Searchlight/Boulder City 04:30:53 -49.0 Dark Down 48.1 149.5 Up 04:15:53 - 04:45:53 -836
Patrick 04:30:49 -49.9 Dark Down 48.6 150.9 Up 04:15:49 - 04:45:49 -854
Laughlin/Bullhead City 04:30:52 -49.4 Dark Down 48.5 149.8 Up 04:15:52 - 04:45:52 -865
Kingman/Dolan Springs 04:30:50 -49.8 Dark Down 48.7 150.5 Up 04:15:50 - 04:45:50 -870
Mohave Valley 04:30:53 -49.4 Dark Down 48.8 149.7 Up 04:15:53 - 04:45:53 -888
DCO 04:30:46 -50.5 Dark Down 49.2 151.7 Up 04:15:46 - 04:45:46 -889
Wildwood 04:31:10 -46.2 Dark Down 47.7 143.9 Up 04:16:10 - 04:46:10 -904
Lake Havasu City 04:30:52 -49.7 Dark Down 49.2 149.8 Up 04:15:52 - 04:45:52 -925
Parker 04:30:53 -49.7 Dark Down 49.5 149.6 Up 04:15:53 - 04:45:53 -956
Idyllwild 04:31:03 -47.8 Dark Down 48.8 146.1 Up 04:16:03 - 04:46:03 -959
Blythe 04:30:55 -49.5 Dark Down 49.9 148.9 Up 04:15:55 - 04:45:55 -997
Calipatria 04:30:59 -48.8 Dark Down 49.9 147.3 Up 04:15:59 - 04:45:59 -1027
Yuma 04:30:57 -49.6 Dark Down 50.6 148.3 Up 04:15:57 - 04:45:57 -1076

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, (2019/11/28 04:30UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 34.61 164
68Omi Cet      02:19:20.8 -02:58:44  2.0  4.65 125
81 Cet         02:37:41.9 -03:23:48  5.6  1.32 129
PPM 184872     02:39:19.6 -02:04:23  8.2  0.43 130
PPM 184825     02:36:55.2 -02:04:31  9.6  0.17 129
504555         02:37:36.9 -02:04:24 13.2       129
Positions are for J2000

Event circumstances last updated at 2017/12/07 17:08:07 UT

Marc W. Buie, Southwest Research Institute

RECON