RECON: TNO occultation with 13GF138

Event between 13GF138 and star UC4-372-067954 with event index number of 119947

Geocentric closest approach at 2018/05/24 08:28:25 UTC

J2000 position of star is 14:47:48.7 -15:43:09
Equinox of date position of star is 14:48:48.4 -15:47:35
Stellar brightness R=14.5, use SENSEUP=128
Star is 44 degrees from the moon. Moon is 73% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 44.2 AU from the Sun and 43.3 AU from the Earth.
The TNO is moving 23.5 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 236 seconds.
The 1-sigma cross-track error in the shadow position is 3754 km.
The sky-plane scale is 31378.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=206.1 km assuming a 5% albedo -- 8.8 sec chord
Diameter=84.1 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 13GF138, (2018/05/24 08:28UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:09.9 -11:15:24  1.0 20.59  24
27Bet Lib      15:18:00.0 -09:26:59  2.6  9.53  48
5 Lib          14:46:58.8 -15:32:10  6.5  0.52  43
PPM 229284     14:48:01.7 -15:44:17  9.5  0.20  43
13GF138        14:48:49.9 -15:47:42 14.5        44
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 3.8 sigma about the mid-time.
The median site spacing is 10.5 km RECON observability=1.0 and success probability=4.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:28:17 -19.9 Dark Up 20.9 208.5 Low 08:13:17 - 08:43:17 4118
Tonasket 08:28:15 -20.1 Dark Up 21.1 208.5 Low 08:13:15 - 08:43:15 4109
Okanogan 08:28:16 -20.5 Dark Up 21.4 208.4 Low 08:13:16 - 08:43:16 4095
Brewster 08:28:16 -20.7 Dark Up 21.7 208.3 Low 08:13:16 - 08:43:16 4083
Manson/Chelan 08:28:17 -21.0 Dark Up 22.0 208.0 Low 08:13:17 - 08:43:17 4071
Entiat 08:28:16 -21.2 Dark Up 22.2 207.9 Low 08:13:16 - 08:43:16 4062
Wenatchee 08:28:17 -21.5 Dark Up 22.5 207.9 Low 08:13:17 - 08:43:17 4051
Ellensburg 08:28:15 -21.9 Dark Up 22.9 207.8 Low 08:13:15 - 08:43:15 4032
Pasco 08:28:11 -22.5 Dark Up 23.1 209.3 Low 08:13:11 - 08:43:11 4017
Yakima 08:28:15 -22.3 Dark Up 23.3 207.8 Low 08:13:15 - 08:43:15 4015
PNWRO 08:28:09 -22.7 Dark Up 23.3 209.6 Low 08:13:09 - 08:43:09 4009
Toppenish/White Swan 08:28:14 -22.5 Dark Up 23.4 208.0 Low 08:13:14 - 08:43:14 4008
George/Umatilla 08:28:10 -22.9 Dark Up 23.5 209.1 Low 08:13:10 - 08:43:10 4000
Goldendale 08:28:15 -23.1 Dark Up 24.1 207.7 Low 08:13:15 - 08:43:15 3980
The Dalles 08:28:15 -23.3 Dark Up 24.4 207.4 Low 08:13:15 - 08:43:15 3966
Maupin 08:28:14 -23.8 Dark Up 24.7 207.6 Low 08:13:14 - 08:43:14 3949
Madras/Culver 08:28:13 -24.3 Dark Up 25.2 207.7 Low 08:13:13 - 08:43:13 3924
Redmond 08:28:12 -24.7 Dark Up 25.6 207.7 Low 08:13:12 - 08:43:12 3908
Sisters 08:28:13 -24.7 Dark Up 25.7 207.3 Low 08:13:13 - 08:43:13 3904
Bend 08:28:12 -24.9 Dark Up 25.8 207.6 Low 08:13:12 - 08:43:12 3896
Oregon Observatory 08:28:12 -25.1 Dark Up 26.0 207.5 Low 08:13:12 - 08:43:12 3887
La Pine/Gilchrist 08:28:12 -25.3 Dark Up 26.2 207.5 Low 08:13:12 - 08:43:12 3877
North Lake 08:28:09 -25.7 Dark Up 26.4 208.2 Low 08:13:09 - 08:43:09 3864
Paisley 08:28:07 -26.2 Dark Up 26.7 208.7 Low 08:13:07 - 08:43:07 3842
Niwot 08:27:16 -25.6 Dark Up 22.1 223.6 Low 08:12:16 - 08:42:16 3840
Lakeview 08:28:05 -26.7 Dark Up 27.1 209.0 Low 08:13:05 - 08:43:05 3819
Chiloquin 08:28:11 -26.4 Dark Up 27.3 207.4 Low 08:13:11 - 08:43:11 3819
Klamath Falls 08:28:10 -26.7 Dark Up 27.6 207.5 Low 08:13:10 - 08:43:10 3804
Tulelake 08:28:07 -27.0 Dark Up 27.7 207.9 Low 08:13:07 - 08:43:07 3794
Cedarville 08:28:04 -27.3 Dark Up 27.6 209.3 Low 08:13:04 - 08:43:04 3789
Fall River/Burney 08:28:06 -27.9 Dark Up 28.5 208.2 Low 08:13:06 - 08:43:06 3750
Susanville 08:28:03 -28.4 Dark Up 28.8 209.1 Low 08:13:03 - 08:43:03 3727
Gimple 08:28:03 -28.7 Dark Up 29.1 209.0 Low 08:13:03 - 08:43:03 3710
Greenville 08:28:03 -28.7 Dark Up 29.1 208.9 Low 08:13:03 - 08:43:03 3709
Quincy 08:28:02 -28.9 Dark Up 29.3 208.9 Low 08:13:02 - 08:43:02 3698
Portola 08:28:01 -29.0 Dark Up 29.2 209.5 Low 08:13:01 - 08:43:01 3698
Reno 08:27:58 -29.2 Dark Up 29.2 210.2 Low 08:12:58 - 08:42:58 3691
Carson City 08:27:57 -29.6 Dark Up 29.5 210.3 Low 08:12:57 - 08:42:57 3673
Yerington 08:27:55 -29.7 Dark Up 29.4 211.0 Low 08:12:55 - 08:42:55 3670
Gardnerville 08:27:57 -29.8 Dark Up 29.7 210.4 Low 08:12:57 - 08:42:57 3660
Hawthorne 08:27:52 -30.1 Dark Up 29.6 211.6 Low 08:12:52 - 08:42:52 3651
Tonopah 08:27:46 -30.3 Dark Up 29.4 213.2 Low 08:12:46 - 08:42:46 3641
Lee Vining 08:27:53 -30.7 Dark Up 30.3 211.3 Up 08:12:53 - 08:42:53 3614
Bishop 08:27:49 -31.2 Dark Up 30.5 212.2 Up 08:12:49 - 08:42:49 3589
Beatty 08:27:42 -31.4 Dark Up 30.2 214.0 Up 08:12:42 - 08:42:42 3581
Indian Springs 08:27:38 -31.5 Dark Up 30.0 215.1 Low 08:12:38 - 08:42:38 3574
Henderson 08:27:35 -31.9 Dark Up 30.1 216.0 Up 08:12:35 - 08:42:35 3551
Lone Pine 08:27:46 -31.9 Dark Up 31.0 212.8 Up 08:12:46 - 08:42:46 3550
Patrick 08:27:30 -32.3 Dark Up 30.1 217.2 Up 08:12:30 - 08:42:30 3525
Searchlight/Boulder City 08:27:33 -32.5 Dark Up 30.6 216.2 Up 08:12:33 - 08:42:33 3517
DCO 08:27:27 -32.4 Dark Up 30.0 218.0 Low 08:12:27 - 08:42:27 3513
Kingman/Dolan Springs 08:27:30 -32.6 Dark Up 30.4 217.1 Up 08:12:30 - 08:42:30 3510
Laughlin/Bullhead City 08:27:31 -32.7 Dark Up 30.6 216.6 Up 08:12:31 - 08:42:31 3503
Mohave Valley 08:27:31 -32.9 Dark Up 30.8 216.8 Up 08:12:31 - 08:42:31 3487
Lake Havasu City 08:27:29 -33.3 Dark Up 31.0 217.1 Up 08:12:29 - 08:42:29 3465
Parker 08:27:28 -33.6 Dark Up 31.3 217.3 Up 08:12:28 - 08:42:28 3444
CPSLO 08:27:52 -33.5 Dark Up 33.2 210.6 Up 08:12:52 - 08:42:52 3440
Blythe 08:27:28 -34.2 Dark Up 31.9 217.2 Up 08:12:28 - 08:42:28 3409
Idyllwild 08:27:35 -34.5 Dark Up 32.8 215.1 Up 08:12:35 - 08:42:35 3393
Wildwood 08:27:43 -34.4 Dark Up 33.4 213.1 Up 08:12:43 - 08:42:43 3393
Calipatria 08:27:30 -34.9 Dark Up 32.7 216.5 Up 08:12:30 - 08:42:30 3368
Yuma 08:27:27 -35.1 Dark Up 32.6 217.5 Up 08:12:27 - 08:42:27 3351

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 13GF138, (2018/05/24 08:28UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 20.59  24
27Bet Lib      15:17:00.3 -09:22:59  2.6  9.53  48
5 Lib          14:45:57.7 -15:27:34  6.5  0.52  43
PPM 229284     14:47:00.5 -15:39:42  9.5  0.20  43
13GF138        14:47:48.7 -15:43:09 14.5        44
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:34:22 UT

Marc W. Buie, Southwest Research Institute

RECON