RECON: TNO occultation with 03YN179

Event between 03YN179 and star UC4-574-024435 with event index number of 104278

Geocentric closest approach at 2018/02/05 02:10:38 UTC

J2000 position of star is 06:09:35.4 +24:41:23
Equinox of date position of star is 06:10:39.2 +24:41:08
Stellar brightness R=15.6, use SENSEUP=128
Star is 104 degrees from the moon. Moon is 75% illuminated.
TNO apparent brightness V=23.7

[RECON map]
TNO is 44.5 AU from the Sun and 43.7 AU from the Earth.
The TNO is moving 17.6 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 1139 seconds.
The 1-sigma cross-track error in the shadow position is 5729 km.
The sky-plane scale is 31719.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=234.4 km assuming a 5% albedo -- 13.4 sec chord
Diameter=95.7 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03YN179, (2018/02/05 02:11UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:09.1 +07:24:32  0.4 17.62 108
Alnath         05:27:26.2 +28:37:16  1.6 10.43 113
3 Gem          06:10:50.0 +23:06:32  5.5  1.58 104
5 Gem          06:12:38.9 +24:24:53  6.7  0.52 103
PPM 095531     06:11:03.6 +24:36:50  9.6  0.11 104
03YN179        06:10:42.1 +24:41:07 15.6       103
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 0.8 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 02:13:23 -12.3 AT Down 48.5 109.8 Up 01:58:23 - 02:28:23 1404
Tonasket 02:13:24 -12.2 AT Down 48.6 109.5 Up 01:58:24 - 02:28:24 1382
Okanogan 02:13:25 -12.1 AT Down 48.6 109.0 Up 01:58:25 - 02:28:25 1354
Brewster 02:13:27 -11.9 CT Down 48.6 108.6 Up 01:58:27 - 02:28:27 1333
Manson/Chelan 02:13:29 -11.6 CT Down 48.4 108.0 Up 01:58:29 - 02:28:29 1321
Entiat 02:13:29 -11.5 CT Down 48.5 107.7 Up 01:58:29 - 02:28:29 1303
Wenatchee 02:13:31 -11.4 CT Down 48.5 107.3 Up 01:58:31 - 02:28:31 1281
Ellensburg 02:13:33 -11.2 CT Down 48.5 106.7 Up 01:58:33 - 02:28:33 1247
Yakima 02:13:34 -11.1 CT Down 48.6 106.2 Up 01:58:34 - 02:28:34 1209
Toppenish/White Swan 02:13:34 -11.2 CT Down 48.7 106.1 Up 01:58:34 - 02:28:34 1185
Pasco 02:13:30 -12.0 CT Down 49.6 107.2 Up 01:58:30 - 02:28:30 1146
Goldendale 02:13:37 -10.8 CT Down 48.6 105.1 Up 01:58:37 - 02:28:37 1142
The Dalles 02:13:39 -10.5 CT Down 48.4 104.6 Up 01:58:39 - 02:28:39 1129
George/Umatilla 02:13:32 -11.8 CT Down 49.6 106.6 Up 01:58:32 - 02:28:32 1119
PNWRO 02:13:30 -12.1 AT Down 49.8 107.1 Up 01:58:30 - 02:28:30 1118
Maupin 02:13:40 -10.5 CT Down 48.6 104.2 Up 01:58:40 - 02:28:40 1087
Madras/Culver 02:13:42 -10.3 CT Down 48.7 103.6 Up 01:58:42 - 02:28:42 1036
Sisters 02:13:44 -9.9 CT Down 48.5 102.8 Up 01:58:44 - 02:28:44 1015
Redmond 02:13:43 -10.2 CT Down 48.8 103.1 Up 01:58:43 - 02:28:43 1003
Bend 02:13:44 -10.1 CT Down 48.7 102.8 Up 01:58:44 - 02:28:44 986
Oregon Observatory 02:13:45 -9.9 CT Down 48.7 102.5 Up 01:58:45 - 02:28:45 973
La Pine/Gilchrist 02:13:46 -9.9 CT Down 48.7 102.2 Up 01:58:46 - 02:28:46 954
North Lake 02:13:45 -10.2 CT Down 49.2 102.2 Up 01:58:45 - 02:28:45 898
Chiloquin 02:13:51 -9.4 CT Down 48.6 100.7 Up 01:58:51 - 02:28:51 856
Paisley 02:13:46 -10.3 CT Down 49.6 101.9 Up 01:58:46 - 02:28:46 837
Klamath Falls 02:13:51 -9.4 CT Down 48.8 100.4 Up 01:58:51 - 02:28:51 820
Tulelake 02:13:51 -9.5 CT Down 49.0 100.3 Up 01:58:51 - 02:28:51 787
Lakeview 02:13:47 -10.4 CT Down 49.8 101.5 Up 01:58:47 - 02:28:47 783
Cedarville 02:13:48 -10.4 CT Down 50.1 100.9 Up 01:58:48 - 02:28:48 714
Fall River/Burney 02:13:54 -9.4 CT Down 49.3 99.3 Up 01:58:54 - 02:28:54 696
Susanville 02:13:53 -9.8 CT Down 49.9 99.2 Up 01:58:53 - 02:28:53 616
Greenville 02:13:55 -9.5 CT Down 49.7 98.6 Up 01:58:55 - 02:28:55 596
Gimple 02:13:55 -9.6 CT Down 49.8 98.7 Up 01:58:55 - 02:28:55 594
Quincy 02:13:55 -9.5 CT Down 49.8 98.4 Up 01:58:55 - 02:28:55 576
Portola 02:13:54 -9.8 CT Down 50.2 98.6 Up 01:58:54 - 02:28:54 552
Reno 02:13:52 -10.2 CT Down 50.7 98.8 Up 01:58:52 - 02:28:52 509
Carson City 02:13:53 -10.2 CT Down 50.8 98.4 Up 01:58:53 - 02:28:53 473
Gardnerville 02:13:54 -10.1 CT Down 50.8 98.1 Up 01:58:54 - 02:28:54 447
Yerington 02:13:51 -10.6 CT Down 51.3 98.6 Up 01:58:51 - 02:28:51 438
Hawthorne 02:13:51 -10.9 CT Down 51.7 98.5 Up 01:58:51 - 02:28:51 379
Lee Vining 02:13:54 -10.4 CT Down 51.5 97.4 Up 01:58:54 - 02:28:54 334
Tonopah 02:13:47 -11.9 CT Down 52.9 99.0 Up 01:58:47 - 02:28:47 298
Niwot 02:12:54 -21.2 Dark Down 61.2 113.4 Up 01:57:54 - 02:27:54 266
Bishop 02:13:53 -10.9 CT Down 52.1 97.2 Up 01:58:53 - 02:28:53 255
Lone Pine 02:13:54 -11.0 CT Down 52.5 96.5 Up 01:58:54 - 02:28:54 170
Beatty 02:13:48 -12.0 AT Down 53.4 97.8 Up 01:58:48 - 02:28:48 169
Indian Springs 02:13:44 -12.8 AT Down 54.3 98.1 Up 01:58:44 - 02:28:44 111
CPSLO 02:14:06 -8.7 CT Down 50.5 93.1 Up 01:59:06 - 02:29:06 103
Henderson 02:13:43 -13.2 AT Down 54.9 97.9 Up 01:58:43 - 02:28:43 40
Searchlight/Boulder City 02:13:44 -13.2 AT Down 55.1 97.1 Up 01:58:44 - 02:28:44 -23
Patrick 02:13:40 -14.0 AT Down 55.9 97.8 Up 01:58:40 - 02:28:40 -51
Laughlin/Bullhead City 02:13:43 -13.4 AT Down 55.4 97.0 Up 01:58:43 - 02:28:43 -61
Kingman/Dolan Springs 02:13:41 -13.8 AT Down 55.8 97.4 Up 01:58:41 - 02:28:41 -70
Wildwood 02:14:01 -10.0 CT Down 52.2 92.9 Up 01:59:01 - 02:29:01 -75
Mohave Valley 02:13:44 -13.4 AT Down 55.4 96.6 Up 01:58:44 - 02:28:44 -90
DCO 02:13:37 -14.5 AT Down 56.5 97.9 Up 01:58:37 - 02:28:37 -99
Lake Havasu City 02:13:44 -13.5 AT Down 55.7 96.2 Up 01:58:44 - 02:28:44 -137
Idyllwild 02:13:55 -11.5 CT Down 53.8 93.6 Up 01:58:55 - 02:28:55 -158
Parker 02:13:44 -13.5 AT Down 55.7 95.7 Up 01:58:44 - 02:28:44 -174
Blythe 02:13:46 -13.1 AT Down 55.5 94.7 Up 01:58:46 - 02:28:46 -221
Calipatria 02:13:51 -12.3 AT Down 54.8 93.4 Up 01:58:51 - 02:28:51 -251
Yuma 02:13:48 -12.9 AT Down 55.6 93.4 Up 01:58:48 - 02:28:48 -317

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 03YN179, (2018/02/05 02:11UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.62 108
Alnath         05:26:17.5 +28:36:24  1.6 10.43 113
3 Gem          06:09:44.0 +23:06:48  5.5  1.58 104
5 Gem          06:11:32.3 +24:25:12  6.7  0.52 103
PPM 095531     06:09:56.9 +24:37:07  9.6  0.11 104
03YN179        06:09:35.4 +24:41:23 15.6       104
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:17:45 UT

Marc W. Buie, Southwest Research Institute

RECON