RECON: TNO occultation with 15AM281

Event between 15AM281 and star UC4-640-045324 with event index number of 161144

Geocentric closest approach at 2018/03/25 06:32:47 UTC

J2000 position of star is 10:04:45.2 +37:50:06
Equinox of date position of star is 10:05:47.3 +37:45:00
Stellar brightness R=16.5, use SENSEUP=128
Star is 45 degrees from the moon. Moon is 57% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 43.7 AU from the Sun and 43.0 AU from the Earth.
The TNO is moving 19.2 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 263 seconds.
The 1-sigma cross-track error in the shadow position is 2389 km.
The sky-plane scale is 31187.3 km/arcsec.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 27.3 sec chord
Diameter=214.3 km assuming a 30% albedo -- 11.1 sec chord
Dynamical classification is 5:2EEE+5:2EII
 
 
 
 
 
 

Star training set for 15AM281, (2018/03/25 06:33UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:20.5 +11:52:39  1.3 25.88  47
Merak          11:02:55.8 +56:17:03  2.4 20.84  58
21 LMi         10:08:30.0 +35:09:18  4.6  2.65  45
PPM 074956     10:04:58.6 +37:55:52  7.2  0.25  45
PPM 074970     10:06:23.3 +37:33:20  9.1  0.22  45
15AM281        10:05:50.3 +37:44:45 16.5        45
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 3.4 sigma about the mid-time.
The median site spacing is 27.8 km RECON observability=1.0 and success probability=1.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:32:01 -35.5 Dark Up 76.7 216.9 Up 06:17:01 - 06:47:01 8595
Tonasket 06:32:01 -35.7 Dark Up 76.9 217.5 Up 06:17:01 - 06:47:01 8570
Okanogan 06:32:02 -36.0 Dark Up 77.2 218.0 Up 06:17:02 - 06:47:02 8533
Brewster 06:32:03 -36.1 Dark Up 77.5 218.1 Up 06:17:03 - 06:47:03 8504
Manson/Chelan 06:32:04 -36.2 Dark Up 77.9 217.6 Up 06:17:04 - 06:47:04 8482
Entiat 06:32:05 -36.4 Dark Up 78.1 218.0 Up 06:17:05 - 06:47:05 8458
Wenatchee 06:32:05 -36.6 Dark Up 78.3 218.4 Up 06:17:05 - 06:47:05 8430
Ellensburg 06:32:05 -36.8 Dark Up 78.7 219.0 Up 06:17:05 - 06:47:05 8385
Yakima 06:32:05 -37.2 Dark Up 79.0 220.2 Up 06:17:05 - 06:47:05 8340
Toppenish/White Swan 06:32:05 -37.4 Dark Up 79.1 221.5 Up 06:17:05 - 06:47:05 8316
Pasco 06:32:00 -38.0 Dark Up 78.6 226.0 Up 06:17:00 - 06:47:00 8301
PNWRO 06:31:59 -38.3 Dark Up 78.7 227.6 Up 06:16:59 - 06:46:59 8273
George/Umatilla 06:32:01 -38.2 Dark Up 79.0 226.6 Up 06:17:01 - 06:47:01 8264
Goldendale 06:32:06 -37.7 Dark Up 79.7 222.0 Up 06:17:06 - 06:47:06 8256
The Dalles 06:32:09 -37.8 Dark Up 80.1 221.6 Up 06:17:09 - 06:47:09 8232
Maupin 06:32:08 -38.2 Dark Up 80.3 223.6 Up 06:17:08 - 06:47:08 8186
Madras/Culver 06:32:08 -38.6 Dark Up 80.7 225.7 Up 06:17:08 - 06:47:08 8126
Sisters 06:32:10 -38.8 Dark Up 81.2 225.6 Up 06:17:10 - 06:47:10 8090
Redmond 06:32:08 -38.9 Dark Up 81.0 227.2 Up 06:17:08 - 06:47:08 8086
Bend 06:32:09 -39.1 Dark Up 81.2 227.7 Up 06:17:09 - 06:47:09 8063
Oregon Observatory 06:32:09 -39.2 Dark Up 81.4 228.0 Up 06:17:09 - 06:47:09 8044
La Pine/Gilchrist 06:32:09 -39.3 Dark Up 81.6 228.8 Up 06:17:09 - 06:47:09 8022
North Lake 06:32:07 -39.9 Dark Up 81.5 233.3 Up 06:17:07 - 06:47:07 7972
Paisley 06:32:06 -40.5 Dark Up 81.6 237.6 Up 06:17:06 - 06:47:06 7910
Chiloquin 06:32:12 -40.1 Dark Up 82.5 233.6 Up 06:17:12 - 06:47:12 7900
Klamath Falls 06:32:11 -40.4 Dark Up 82.6 236.1 Up 06:17:11 - 06:47:11 7862
Lakeview 06:32:05 -41.0 Dark Up 81.8 241.2 Up 06:17:05 - 06:47:05 7853
Tulelake 06:32:10 -40.8 Dark Up 82.6 238.9 Up 06:17:10 - 06:47:10 7831
Cedarville 06:32:05 -41.6 Dark Up 81.9 245.8 Up 06:17:05 - 06:47:05 7780
Fall River/Burney 06:32:10 -41.5 Dark Up 83.0 245.5 Up 06:17:10 - 06:47:10 7730
Niwot 06:31:00 -47.3 Dark Up 71.2 270.8 Up 06:16:00 - 06:46:00 7691
Susanville 06:32:07 -42.4 Dark Up 82.7 252.3 Up 06:17:07 - 06:47:07 7658
Greenville 06:32:08 -42.5 Dark Up 83.0 253.7 Up 06:17:08 - 06:47:08 7628
Gimple 06:32:08 -42.5 Dark Up 82.9 253.9 Up 06:17:08 - 06:47:08 7628
Quincy 06:32:08 -42.6 Dark Up 83.0 255.2 Up 06:17:08 - 06:47:08 7605
Portola 06:32:06 -43.0 Dark Up 82.7 257.2 Up 06:17:06 - 06:47:06 7590
Reno 06:32:04 -43.4 Dark Up 82.3 260.3 Up 06:17:04 - 06:47:04 7559
Carson City 06:32:03 -43.8 Dark Up 82.3 263.0 Up 06:17:03 - 06:47:03 7520
Yerington 06:32:00 -44.2 Dark Up 81.8 265.1 Up 06:17:00 - 06:47:00 7497
Gardnerville 06:32:03 -44.0 Dark Up 82.3 264.8 Up 06:17:03 - 06:47:03 7492
Hawthorne 06:31:58 -44.8 Dark Up 81.5 268.7 Up 06:16:58 - 06:46:58 7445
Tonopah 06:31:51 -45.8 Dark Up 80.4 272.5 Up 06:16:51 - 06:46:51 7393
Lee Vining 06:32:00 -45.1 Dark Up 81.8 272.3 Up 06:17:00 - 06:47:00 7383
Bishop 06:31:57 -45.9 Dark Up 81.2 276.5 Up 06:16:57 - 06:46:57 7316
Beatty 06:31:49 -46.9 Dark Up 79.9 279.1 Up 06:16:49 - 06:46:49 7265
Lone Pine 06:31:55 -46.7 Dark Up 80.8 281.2 Up 06:16:55 - 06:46:55 7231
Indian Springs 06:31:45 -47.6 Dark Up 79.0 280.7 Up 06:16:45 - 06:46:45 7230
Henderson 06:31:43 -48.4 Dark Up 78.3 283.2 Up 06:16:43 - 06:46:43 7172
Searchlight/Boulder City 06:31:41 -48.9 Dark Up 78.1 285.8 Up 06:16:41 - 06:46:41 7109
Patrick 06:31:36 -49.4 Dark Up 77.3 285.6 Up 06:16:36 - 06:46:36 7106
CPSLO 06:32:07 -46.6 Dark Up 82.5 292.2 Up 06:17:07 - 06:47:07 7091
Kingman/Dolan Springs 06:31:37 -49.5 Dark Up 77.4 286.6 Up 06:16:37 - 06:46:37 7081
Laughlin/Bullhead City 06:31:40 -49.3 Dark Up 77.8 287.0 Up 06:16:40 - 06:46:40 7077
DCO 06:31:34 -49.9 Dark Up 76.7 286.6 Up 06:16:34 - 06:46:34 7075
Mohave Valley 06:31:40 -49.5 Dark Up 77.7 288.2 Up 06:16:40 - 06:46:40 7047
Lake Havasu City 06:31:38 -50.0 Dark Up 77.4 289.7 Up 06:16:38 - 06:46:38 7003
Parker 06:31:39 -50.3 Dark Up 77.2 291.2 Up 06:16:39 - 06:46:39 6964
Wildwood 06:31:58 -48.5 Dark Up 80.4 296.2 Up 06:16:58 - 06:46:58 6953
Idyllwild 06:31:49 -49.7 Dark Up 78.9 295.3 Up 06:16:49 - 06:46:49 6914
Blythe 06:31:40 -50.6 Dark Up 77.3 293.6 Up 06:16:40 - 06:46:40 6905
Calipatria 06:31:44 -50.7 Dark Up 77.8 296.5 Up 06:16:44 - 06:46:44 6849
Yuma 06:31:40 -51.4 Dark Up 76.9 297.3 Up 06:16:40 - 06:46:40 6803

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 15AM281, (2018/03/25 06:33UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 25.88  47
Merak          11:01:50.7 +56:22:57  2.4 20.84  58
21 LMi         10:07:25.9 +35:14:41  4.6  2.65  45
PPM 074956     10:03:53.4 +38:01:12  7.2  0.25  45
PPM 074970     10:05:18.3 +37:38:41  9.1  0.22  45
15AM281        10:04:45.2 +37:50:06 16.5        45
Positions are for J2000

Event circumstances last updated at 2017/05/18 18:00:20 UT

Marc W. Buie, Southwest Research Institute

RECON