RECON: TNO occultation with 131697

Event between (131697) 01XH255 and star UC4-536-049276 with event index number of 80144

Geocentric closest approach at 2017/05/10 05:02:38 UTC

J2000 position of star is 09:05:54.3 +17:00:48
Equinox of date position of star is 09:06:49.5 +16:56:48
Stellar brightness R=16.6
Star is 88 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=23.6

[RECON map]
TNO is 33.1 AU from the Sun and 33.1 AU from the Earth.
The TNO is moving 7.8 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 772 seconds.
The 1-sigma cross-track error in the shadow position is 2795 km.
The sky-plane scale is 24039.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 17.7 sec chord
Diameter=56.4 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is 5:4E
 
 
 
 
 
 

Star training set for 131697, (2017/05/10 05:03UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:17.7 +11:52:54  1.3 15.93  72
63Omi2Cnc      08:58:33.2 +15:30:49  5.8  2.46  90
PPM 126110     09:07:13.8 +17:02:29  8.1  0.13  88
131697         09:06:52.6 +16:56:35 16.6        88
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 1.2 sigma about the mid-time.
The median site spacing is 12.7 km RECON observability=0.9 and success probability=7.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:06:01 -13.7 AT Up 39.4 248.5 Up 04:51:01 - 05:21:01 3082
Tonasket 05:06:06 -13.8 AT Up 39.5 248.7 Up 04:51:06 - 05:21:06 3068
Okanogan 05:06:10 -14.0 AT Up 39.7 248.9 Up 04:51:10 - 05:21:10 3044
Niwot 05:08:53 -27.0 Dark Up 30.8 266.8 Up 04:53:53 - 05:23:53 3044
Brewster 05:06:12 -14.2 AT Up 39.9 248.9 Up 04:51:12 - 05:21:12 3021
Manson/Chelan 05:06:13 -14.2 AT Up 40.2 248.7 Up 04:51:13 - 05:21:13 2997
Entiat 05:06:16 -14.3 AT Up 40.3 248.8 Up 04:51:16 - 05:21:16 2981
Wenatchee 05:06:17 -14.4 AT Up 40.4 248.9 Up 04:51:17 - 05:21:17 2963
Pasco 05:06:38 -15.9 AT Up 40.0 251.1 Up 04:51:38 - 05:21:38 2934
Ellensburg 05:06:21 -14.7 AT Up 40.7 249.1 Up 04:51:21 - 05:21:21 2931
PNWRO 05:06:43 -16.2 AT Up 39.9 251.5 Up 04:51:43 - 05:21:43 2927
George/Umatilla 05:06:39 -16.0 AT Up 40.3 251.1 Up 04:51:39 - 05:21:39 2905
Yakima 05:06:25 -15.0 AT Up 40.9 249.4 Up 04:51:25 - 05:21:25 2905
Toppenish/White Swan 05:06:29 -15.2 AT Up 40.8 249.8 Up 04:51:29 - 05:21:29 2898
Goldendale 05:06:32 -15.4 AT Up 41.3 249.8 Up 04:51:32 - 05:21:32 2849
The Dalles 05:06:34 -15.4 AT Up 41.6 249.7 Up 04:51:34 - 05:21:34 2822
Maupin 05:06:39 -15.8 AT Up 41.7 250.1 Up 04:51:39 - 05:21:39 2799
Madras/Culver 05:06:45 -16.2 AT Up 41.9 250.6 Up 04:51:45 - 05:21:45 2763
Redmond 05:06:48 -16.4 AT Up 42.0 250.9 Up 04:51:48 - 05:21:48 2738
Sisters 05:06:46 -16.2 AT Up 42.3 250.5 Up 04:51:46 - 05:21:46 2726
Bend 05:06:50 -16.5 AT Up 42.2 250.9 Up 04:51:50 - 05:21:50 2720
Oregon Observatory 05:06:51 -16.6 AT Up 42.3 251.0 Up 04:51:51 - 05:21:51 2704
La Pine/Gilchrist 05:06:51 -16.7 AT Up 42.4 251.1 Up 04:51:51 - 05:21:51 2688
North Lake 05:07:01 -17.3 AT Up 42.1 252.0 Up 04:52:01 - 05:22:01 2682
Paisley 05:07:08 -17.9 AT Up 42.0 252.8 Up 04:52:08 - 05:22:08 2658
Lakeview 05:07:15 -18.4 Dark Up 42.0 253.5 Up 04:52:15 - 05:22:15 2632
Chiloquin 05:07:04 -17.3 AT Up 43.0 251.8 Up 04:52:04 - 05:22:04 2602
Cedarville 05:07:26 -19.0 Dark Up 42.0 254.2 Up 04:52:26 - 05:22:26 2594
Klamath Falls 05:07:07 -17.6 AT Up 43.0 252.2 Up 04:52:07 - 05:22:07 2581
Tulelake 05:07:14 -18.0 AT Up 42.9 252.7 Up 04:52:14 - 05:22:14 2574
Fall River/Burney 05:07:23 -18.7 Dark Up 43.0 253.6 Up 04:52:23 - 05:22:23 2515
Susanville 05:07:35 -19.6 Dark Up 42.6 254.8 Up 04:52:35 - 05:22:35 2500
Reno 05:07:48 -20.7 Dark Up 42.2 256.3 Up 04:52:48 - 05:22:48 2472
Greenville 05:07:34 -19.6 Dark Up 42.9 254.8 Up 04:52:34 - 05:22:34 2470
Tonopah 05:08:21 -23.2 Dark Up 40.4 259.7 Up 04:53:21 - 05:23:21 2468
Portola 05:07:41 -20.1 Dark Up 42.6 255.6 Up 04:52:41 - 05:22:41 2466
Yerington 05:07:57 -21.4 Dark Up 41.8 257.4 Up 04:52:57 - 05:22:57 2458
Quincy 05:07:38 -19.8 Dark Up 43.0 255.0 Up 04:52:38 - 05:22:38 2456
Carson City 05:07:51 -21.0 Dark Up 42.2 256.7 Up 04:52:51 - 05:22:51 2448
Hawthorne 05:08:08 -22.1 Dark Up 41.4 258.2 Up 04:53:08 - 05:23:08 2446
Gardnerville 05:07:56 -21.2 Dark Up 42.2 257.0 Up 04:52:56 - 05:22:56 2432
Indian Springs 05:08:46 -25.2 Dark Up 39.3 262.1 Up 04:53:46 - 05:23:46 2423
DCO 05:09:16 -27.7 Dark Up 37.4 265.0 Up 04:54:16 - 05:24:16 2417
Henderson 05:08:55 -26.0 Dark Up 38.8 263.0 Up 04:53:55 - 05:23:55 2412
Patrick 05:09:09 -27.1 Dark Up 37.9 264.3 Up 04:54:09 - 05:24:09 2411
Beatty 05:08:36 -24.4 Dark Up 40.2 261.1 Up 04:53:36 - 05:23:36 2404
Kingman/Dolan Springs 05:09:10 -27.1 Dark Up 38.1 264.4 Up 04:54:10 - 05:24:10 2388
Lee Vining 05:08:11 -22.3 Dark Up 41.9 258.4 Up 04:53:11 - 05:23:11 2388
Searchlight/Boulder City 05:09:03 -26.5 Dark Up 38.8 263.6 Up 04:54:03 - 05:24:03 2374
Bishop 05:08:21 -23.1 Dark Up 41.4 259.5 Up 04:53:21 - 05:23:21 2373
Laughlin/Bullhead City 05:09:07 -26.9 Dark Up 38.6 264.0 Up 04:54:07 - 05:24:07 2365
Mohave Valley 05:09:10 -27.1 Dark Up 38.6 264.3 Up 04:54:10 - 05:24:10 2346
Lone Pine 05:08:31 -23.9 Dark Up 41.3 260.4 Up 04:53:31 - 05:23:31 2331
Lake Havasu City 05:09:17 -27.6 Dark Up 38.4 264.8 Up 04:54:17 - 05:24:17 2327
Parker 05:09:18 -27.9 Dark Up 38.4 265.1 Up 04:54:18 - 05:24:18 2302
Blythe 05:09:24 -28.1 Dark Up 38.7 265.3 Up 04:54:24 - 05:24:24 2252
Yuma 05:09:34 -28.8 Dark Up 38.7 266.0 Up 04:54:34 - 05:24:34 2181
Calipatria 05:09:24 -28.0 Dark Up 39.5 265.1 Up 04:54:24 - 05:24:24 2177
Idyllwild 05:09:10 -26.8 Dark Up 40.4 263.9 Up 04:54:10 - 05:24:10 2175
CPSLO 05:08:29 -23.4 Dark Up 43.6 259.7 Up 04:53:29 - 05:23:29 2132
Wildwood 05:08:53 -25.5 Dark Up 42.0 262.3 Up 04:53:53 - 05:23:53 2125

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 131697, (2017/05/10 05:03UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 15.93  72
63Omi2Cnc      08:57:35.2 +15:34:53  5.8  2.46  90
PPM 126110     09:06:15.6 +17:06:42  8.1  0.13  88
131697         09:05:54.3 +17:00:48 16.6        88
Positions are for J2000

Event circumstances last updated at 2016/06/09 18:39:20 UT

Marc W. Buie, Southwest Research Institute

RECON