RECON: TNO occultation with 450265

Event between (450265) 03WU172 and star UC4-586-035913 with event index number of 125105

Geocentric closest approach at 2017/12/01 07:17:11 UTC

J2000 position of star is 06:55:41.7 +27:06:31
Equinox of date position of star is 06:56:44.4 +27:05:09
Stellar brightness R=14.9
Star is 67 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=21.3

[RECON map]
TNO is 29.3 AU from the Sun and 28.4 AU from the Earth.
The TNO is moving 19.2 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 145 seconds.
The 1-sigma cross-track error in the shadow position is 1301 km.
The sky-plane scale is 20615.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 17.2 sec chord
Diameter=117.7 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2017/12/01 07:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:24.6 +27:58:53  1.1 11.03  78
39 Gem         06:59:53.6 +26:03:21  6.5  1.24  67
PPM 096719     06:55:35.8 +26:30:25  7.9  0.64  66
PPM 096739     06:56:20.8 +27:19:44  8.9  0.27  66
PPM 096753     06:56:51.5 +26:53:32 11.2  0.19  67
450265         06:56:48.7 +27:05:03 14.9        67
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 5.0 sigma about the mid-time.
The median site spacing is 24.7 km RECON observability=1.0 and success probability=12.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:20:01 -62.4 Dark Up 50.5 107.5 Up 07:07:24 - 07:32:38 -1979
Tonasket 07:20:02 -62.6 Dark Up 50.5 107.2 Up 07:07:25 - 07:32:39 -2003
Okanogan 07:20:03 -62.9 Dark Up 50.5 106.7 Up 07:07:26 - 07:32:40 -2035
Brewster 07:20:04 -63.1 Dark Up 50.5 106.2 Up 07:07:27 - 07:32:41 -2060
Manson/Chelan 07:20:06 -63.3 Dark Up 50.3 105.6 Up 07:07:29 - 07:32:43 -2076
Entiat 07:20:06 -63.5 Dark Up 50.3 105.3 Up 07:07:29 - 07:32:43 -2097
Wenatchee 07:20:07 -63.7 Dark Up 50.3 104.9 Up 07:07:30 - 07:32:44 -2122
Ellensburg 07:20:09 -64.1 Dark Up 50.3 104.2 Up 07:07:32 - 07:32:46 -2160
Yakima 07:20:10 -64.5 Dark Up 50.4 103.7 Up 07:07:33 - 07:32:47 -2202
Toppenish/White Swan 07:20:10 -64.7 Dark Up 50.5 103.6 Up 07:07:33 - 07:32:47 -2226
Pasco 07:20:06 -65.0 Dark Up 51.4 104.6 Up 07:07:29 - 07:32:43 -2258
Goldendale 07:20:12 -65.1 Dark Up 50.4 102.6 Up 07:07:35 - 07:32:49 -2277
PNWRO 07:20:06 -65.3 Dark Up 51.6 104.6 Up 07:07:29 - 07:32:43 -2286
George/Umatilla 07:20:07 -65.3 Dark Up 51.4 104.0 Up 07:07:30 - 07:32:44 -2289
The Dalles 07:20:13 -65.3 Dark Up 50.2 102.0 Up 07:07:36 - 07:32:50 -2294
Maupin 07:20:14 -65.7 Dark Up 50.4 101.6 Up 07:07:37 - 07:32:51 -2339
Madras/Culver 07:20:15 -66.2 Dark Up 50.4 100.9 Up 07:07:38 - 07:32:52 -2395
Sisters 07:20:17 -66.4 Dark Up 50.2 100.1 Up 07:07:40 - 07:32:54 -2422
Redmond 07:20:16 -66.5 Dark Up 50.5 100.5 Up 07:07:39 - 07:32:53 -2431
Bend 07:20:17 -66.7 Dark Up 50.4 100.1 Up 07:07:40 - 07:32:54 -2451
Oregon Observatory 07:20:18 -66.8 Dark Up 50.3 99.8 Up 07:07:41 - 07:32:55 -2466
La Pine/Gilchrist 07:20:18 -67.0 Dark Up 50.3 99.5 Up 07:07:41 - 07:32:55 -2487
North Lake 07:20:17 -67.6 Dark Up 50.8 99.5 Up 07:07:40 - 07:32:54 -2542
Chiloquin 07:20:21 -67.9 Dark Up 50.3 97.9 Up 07:07:44 - 07:32:58 -2597
Paisley 07:20:17 -68.2 Dark Up 51.2 99.1 Up 07:07:40 - 07:32:54 -2605
Klamath Falls 07:20:21 -68.3 Dark Up 50.4 97.5 Up 07:07:44 - 07:32:58 -2634
Lakeview 07:20:17 -68.7 Dark Up 51.4 98.6 Up 07:07:40 - 07:32:54 -2661
Tulelake 07:20:21 -68.6 Dark Up 50.6 97.4 Up 07:07:44 - 07:32:58 -2667
Cedarville 07:20:18 -69.4 Dark Up 51.6 97.9 Up 07:07:41 - 07:32:55 -2733
Fall River/Burney 07:20:22 -69.5 Dark Up 50.8 96.4 Up 07:07:45 - 07:32:59 -2764
Susanville 07:20:21 -70.3 Dark Up 51.4 96.2 Up 07:07:44 - 07:32:58 -2843
Greenville 07:20:23 -70.4 Dark Up 51.2 95.6 Up 07:07:46 - 07:33:00 -2867
Quincy 07:20:23 -70.6 Dark Up 51.3 95.4 Up 07:07:46 - 07:33:00 -2888
Portola 07:20:21 -70.9 Dark Up 51.6 95.6 Up 07:07:44 - 07:32:58 -2910
Reno 07:20:20 -71.3 Dark Up 52.1 95.7 Up 07:07:43 - 07:32:57 -2949
Carson City 07:20:20 -71.7 Dark Up 52.2 95.3 Up 07:07:43 - 07:32:57 -2987
Gardnerville 07:20:20 -71.9 Dark Up 52.3 95.0 Up 07:07:43 - 07:32:57 -3014
Yerington 07:20:19 -72.0 Dark Up 52.7 95.5 Up 07:07:42 - 07:32:56 -3018
Niwot 07:19:26 -70.7 Dark Up 62.8 109.7 Up 07:06:49 - 07:32:03 -3055
Hawthorne 07:20:18 -72.6 Dark Up 53.2 95.2 Up 07:07:41 - 07:32:55 -3076
Lee Vining 07:20:20 -73.0 Dark Up 52.8 94.1 Up 07:07:43 - 07:32:57 -3129
Tonopah 07:20:13 -73.3 Dark Up 54.3 95.6 Up 07:07:36 - 07:32:50 -3148
Bishop 07:20:18 -73.7 Dark Up 53.4 93.8 Up 07:07:41 - 07:32:55 -3205
Beatty 07:20:13 -74.6 Dark Up 54.8 94.3 Up 07:07:36 - 07:32:50 -3280
Lone Pine 07:20:18 -74.6 Dark Up 53.7 93.0 Up 07:07:41 - 07:32:55 -3292
Indian Springs 07:20:10 -75.1 Dark Up 55.6 94.6 Up 07:07:33 - 07:32:47 -3330
CPSLO 07:20:29 -74.9 Dark Up 51.7 89.8 Up 07:07:52 - 07:33:06 -3388
Henderson 07:20:08 -75.7 Dark Up 56.2 94.3 Up 07:07:31 - 07:32:45 -3398
Searchlight/Boulder City 07:20:08 -76.2 Dark Up 56.3 93.4 Up 07:07:31 - 07:32:45 -3461
Patrick 07:20:04 -76.4 Dark Up 57.2 94.0 Up 07:07:27 - 07:32:41 -3481
Laughlin/Bullhead City 07:20:07 -76.6 Dark Up 56.6 93.2 Up 07:07:30 - 07:32:44 -3498
Kingman/Dolan Springs 07:20:05 -76.6 Dark Up 57.0 93.6 Up 07:07:28 - 07:32:42 -3503
DCO 07:20:02 -76.7 Dark Up 57.8 94.0 Up 07:07:25 - 07:32:39 -3524
Mohave Valley 07:20:07 -76.8 Dark Up 56.6 92.8 Up 07:07:30 - 07:32:44 -3528
Wildwood 07:20:23 -76.7 Dark Up 53.4 89.3 Up 07:07:46 - 07:33:00 -3554
Lake Havasu City 07:20:07 -77.3 Dark Up 56.8 92.3 Up 07:07:30 - 07:32:44 -3575
Parker 07:20:07 -77.6 Dark Up 56.9 91.8 Up 07:07:30 - 07:32:44 -3614
Idyllwild 07:20:17 -77.6 Dark Up 54.9 89.9 Up 07:07:40 - 07:32:54 -3623
Blythe 07:20:09 -78.1 Dark Up 56.7 90.9 Up 07:07:32 - 07:32:46 -3667
Calipatria 07:20:13 -78.5 Dark Up 55.9 89.6 Up 07:07:36 - 07:32:50 -3707
Yuma 07:20:10 -79.0 Dark Up 56.6 89.4 Up 07:07:33 - 07:32:47 -3767

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 450265, (2017/12/01 07:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.2 +28:01:33  1.1 11.03  78
39 Gem         06:58:47.2 +26:04:53  6.5  1.24  67
PPM 096719     06:54:29.1 +26:31:50  7.9  0.64  66
PPM 096739     06:55:13.6 +27:21:10  8.9  0.27  66
PPM 096753     06:55:44.6 +26:54:59 11.2  0.19  67
450265         06:55:41.7 +27:06:31 14.9        67
Positions are for J2000

Event circumstances last updated at 2016/10/08 16:39:41 UT

Marc W. Buie, Southwest Research Institute

RECON