RECON: TNO occultation with 504555

Event between (504555) 08SO266 and star GA0860:00211619 with event index number of 228456

Geocentric closest approach at 2019/11/28 04:29:31 UTC

J2000 position of star is 02:37:36.9 -02:04:24
Equinox of date position of star is 02:38:34.2 -01:59:33
Stellar brightness G=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 226 seconds.
The 1-sigma cross-track error in the shadow position is 1418 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 4.0 sigma about the mid-time.
The median site spacing is 16.3 km RECON observability=1.0 and success probability=26.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 04:30:13 -42.1 Dark Down 33.9 149.7 Up 04:15:13 - 04:45:13 650
Kelowna 04:30:12 -42.3 Dark Down 33.9 150.1 Up 04:15:12 - 04:45:12 650
Penticton 04:30:13 -42.3 Dark Down 34.2 149.8 Up 04:15:13 - 04:45:13 629
Okanagan Falls 04:30:14 -42.3 Dark Down 34.4 149.7 Up 04:15:14 - 04:45:14 617
Oliver 04:30:14 -42.4 Dark Down 34.5 149.7 Up 04:15:14 - 04:45:14 606
Anarchist Mountain Observatory 04:30:14 -42.6 Dark Down 34.7 149.8 Up 04:15:14 - 04:45:14 593
Oroville 04:30:14 -42.6 Dark Down 34.8 149.7 Up 04:15:14 - 04:45:14 589
Tonasket 04:30:14 -42.6 Dark Down 35.0 149.6 Up 04:15:14 - 04:45:14 575
Okanogan 04:30:16 -42.6 Dark Down 35.2 149.4 Up 04:15:16 - 04:45:16 554
Brewster 04:30:17 -42.6 Dark Down 35.4 149.0 Up 04:15:17 - 04:45:17 539
Manson/Chelan 04:30:18 -42.4 Dark Down 35.4 148.5 Up 04:15:18 - 04:45:18 529
Entiat 04:30:19 -42.4 Dark Down 35.6 148.4 Up 04:15:19 - 04:45:19 515
Wenatchee 04:30:20 -42.5 Dark Down 35.8 148.2 Up 04:15:20 - 04:45:20 500
Ellensburg 04:30:22 -42.4 Dark Down 36.0 147.8 Up 04:15:22 - 04:45:22 475
Yakima 04:30:23 -42.5 Dark Down 36.4 147.6 Up 04:15:23 - 04:45:23 448
Toppenish/White Swan 04:30:23 -42.7 Dark Down 36.6 147.7 Up 04:15:23 - 04:45:23 431
Pasco 04:30:19 -43.6 Dark Down 37.2 149.1 Up 04:15:19 - 04:45:19 410
Goldendale 04:30:25 -42.5 Dark Down 36.9 147.0 Up 04:15:25 - 04:45:25 398
PNWRO 04:30:18 -43.8 Dark Down 37.5 149.3 Up 04:15:18 - 04:45:18 391
George/Umatilla 04:30:20 -43.5 Dark Down 37.4 148.7 Up 04:15:20 - 04:45:20 389
The Dalles 04:30:27 -42.3 Dark Down 37.0 146.5 Up 04:15:27 - 04:45:27 387
Maupin 04:30:28 -42.5 Dark Down 37.4 146.4 Up 04:15:28 - 04:45:28 357
Madras/Culver 04:30:29 -42.6 Dark Down 37.8 146.2 Up 04:15:29 - 04:45:29 319
Sisters 04:30:31 -42.4 Dark Down 37.9 145.5 Up 04:15:31 - 04:45:31 300
Redmond 04:30:30 -42.7 Dark Down 38.1 146.0 Up 04:15:30 - 04:45:30 295
Bend 04:30:31 -42.6 Dark Down 38.2 145.7 Up 04:15:31 - 04:45:31 281
Oregon Observatory 04:30:32 -42.6 Dark Down 38.3 145.5 Up 04:15:32 - 04:45:32 270
La Pine/Gilchrist 04:30:32 -42.6 Dark Down 38.5 145.3 Up 04:15:32 - 04:45:32 256
North Lake 04:30:31 -43.1 Dark Down 39.1 145.8 Up 04:15:31 - 04:45:31 219
Chiloquin 04:30:35 -42.5 Dark Down 39.2 144.4 Up 04:15:35 - 04:45:35 180
Paisley 04:30:31 -43.4 Dark Down 39.7 146.0 Up 04:15:31 - 04:45:31 175
Klamath Falls 04:30:36 -42.6 Dark Down 39.5 144.3 Up 04:15:36 - 04:45:36 154
Lakeview 04:30:32 -43.7 Dark Down 40.2 146.0 Up 04:15:32 - 04:45:32 136
Tulelake 04:30:35 -42.9 Dark Down 39.9 144.6 Up 04:15:35 - 04:45:35 131
Cedarville 04:30:32 -43.9 Dark Down 40.8 145.9 Up 04:15:32 - 04:45:32 85
Fall River/Burney 04:30:37 -43.1 Dark Down 40.7 144.2 Up 04:15:37 - 04:45:37 62
Susanville 04:30:36 -43.8 Dark Down 41.5 144.8 Up 04:15:36 - 04:45:36 7
Greenville 04:30:38 -43.6 Dark Down 41.6 144.3 Up 04:15:38 - 04:45:38 -11
Gimple 04:30:37 -43.6 Dark Down 41.6 144.4 Up 04:15:37 - 04:45:37 -13
Quincy 04:30:38 -43.6 Dark Down 41.8 144.2 Up 04:15:38 - 04:45:38 -27
Portola 04:30:37 -44.0 Dark Down 42.1 144.7 Up 04:15:37 - 04:45:37 -42
Reno 04:30:35 -44.5 Dark Down 42.6 145.3 Up 04:15:35 - 04:45:35 -70
Carson City 04:30:35 -44.6 Dark Down 42.9 145.2 Up 04:15:35 - 04:45:35 -98
Gardnerville 04:30:36 -44.7 Dark Down 43.1 145.1 Up 04:15:36 - 04:45:36 -117
Yerington 04:30:34 -45.1 Dark Down 43.3 145.8 Up 04:15:34 - 04:45:34 -120
Hawthorne 04:30:32 -45.6 Dark Down 43.9 146.2 Up 04:15:32 - 04:45:32 -163
Lee Vining 04:30:35 -45.3 Dark Down 44.2 145.3 Up 04:15:35 - 04:45:35 -202
Niwot 04:29:39 -55.0 Dark Down 46.8 164.8 Up 04:14:39 - 04:44:39 -208
Tonopah 04:30:28 -46.7 Dark Down 44.9 147.8 Up 04:15:28 - 04:45:28 -217
Bishop 04:30:34 -45.9 Dark Down 45.0 145.9 Up 04:15:34 - 04:45:34 -259
Beatty 04:30:28 -47.3 Dark Down 46.1 147.7 Up 04:15:28 - 04:45:28 -316
Lone Pine 04:30:34 -46.3 Dark Down 45.8 145.9 Up 04:15:34 - 04:45:34 -324
Indian Springs 04:30:25 -48.2 Dark Down 46.8 148.9 Up 04:15:25 - 04:45:25 -356
CPSLO 04:30:46 -44.4 Dark Down 45.6 141.9 Up 04:15:46 - 04:45:46 -399
Henderson 04:30:23 -48.8 Dark Down 47.6 149.6 Up 04:15:23 - 04:45:23 -409
Searchlight/Boulder City 04:30:24 -48.9 Dark Down 48.1 149.3 Up 04:15:24 - 04:45:24 -458
Patrick 04:30:20 -49.8 Dark Down 48.6 150.7 Up 04:15:20 - 04:45:20 -476
Laughlin/Bullhead City 04:30:23 -49.3 Dark Down 48.5 149.6 Up 04:15:23 - 04:45:23 -487
Kingman/Dolan Springs 04:30:21 -49.7 Dark Down 48.7 150.4 Up 04:15:21 - 04:45:21 -492
Mohave Valley 04:30:24 -49.3 Dark Down 48.7 149.5 Up 04:15:24 - 04:45:24 -510
DCO 04:30:18 -50.4 Dark Down 49.1 151.5 Up 04:15:18 - 04:45:18 -511
Wildwood 04:30:41 -46.1 Dark Down 47.6 143.7 Up 04:15:41 - 04:45:41 -526
Lake Havasu City 04:30:23 -49.6 Dark Down 49.2 149.6 Up 04:15:23 - 04:45:23 -547
Parker 04:30:24 -49.6 Dark Down 49.5 149.4 Up 04:15:24 - 04:45:24 -577
Idyllwild 04:30:34 -47.7 Dark Down 48.8 145.9 Up 04:15:34 - 04:45:34 -580
Blythe 04:30:26 -49.4 Dark Down 49.8 148.7 Up 04:15:26 - 04:45:26 -618
Calipatria 04:30:30 -48.7 Dark Down 49.8 147.1 Up 04:15:30 - 04:45:30 -648
Yuma 04:30:28 -49.5 Dark Down 50.6 148.1 Up 04:15:28 - 04:45:28 -697

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 2018/10/25 20:35:35 UT

Marc W. Buie, Southwest Research Institute

RECON