RECON: TNO occultation with 149349

Event between (149349) 02VA131 and star UC4-536-005733 with event index number of 94638

Geocentric closest approach at 2017/12/11 03:46:59 UTC

J2000 position of star is 03:14:31.4 +17:05:47
Equinox of date position of star is 03:15:30.2 +17:09:37
Stellar brightness R=15.4, use SENSEUP=128
Star is 129 degrees from the moon. Moon is 41% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 36.5 AU from the Sun and 35.6 AU from the Earth.
The TNO is moving 21.5 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 220 seconds.
The 1-sigma cross-track error in the shadow position is 1561 km.
The sky-plane scale is 25836.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 12.2 sec chord
Diameter=107.4 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 

Star training set for 149349, (2017/12/11 03:47UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.1 +16:32:38  0.8 19.48 110
Menkar         03:03:13.2 +04:09:33  2.5 13.35 135
57Del Ari      03:12:39.5 +19:47:36  4.3  2.72 128
PPM 118904     03:13:16.9 +17:22:03  8.5  0.58 129
PPM 118915     03:14:00.8 +17:11:54  8.7  0.37 129
PPM 118949     03:16:06.5 +17:07:54 10.3  0.14 128
149349         03:15:32.1 +17:09:44 15.4       128
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 4.1 sigma about the mid-time.
The median site spacing is 17.8 km RECON observability=1.0 and success probability=10.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 03:47:49 -36.1 Dark Down 49.4 130.7 Up 03:32:49 - 04:02:49 -2293
Tonasket 03:47:50 -36.2 Dark Down 49.6 130.5 Up 03:32:50 - 04:02:50 -2311
Okanogan 03:47:51 -36.1 Dark Down 49.7 130.0 Up 03:32:51 - 04:02:51 -2332
Brewster 03:47:52 -36.0 Dark Down 49.8 129.5 Up 03:32:52 - 04:02:52 -2347
Manson/Chelan 03:47:54 -35.8 Dark Down 49.7 128.9 Up 03:32:54 - 04:02:54 -2352
Entiat 03:47:55 -35.8 Dark Down 49.8 128.6 Up 03:32:55 - 04:02:55 -2367
Wenatchee 03:47:56 -35.7 Dark Down 50.0 128.2 Up 03:32:56 - 04:02:56 -2384
Ellensburg 03:47:58 -35.6 Dark Down 50.1 127.6 Up 03:32:58 - 04:02:58 -2409
Yakima 03:47:59 -35.6 Dark Down 50.3 127.2 Up 03:32:59 - 04:02:59 -2441
Toppenish/White Swan 03:47:59 -35.7 Dark Down 50.6 127.2 Up 03:32:59 - 04:02:59 -2463
Goldendale 03:48:03 -35.5 Dark Down 50.7 126.1 Up 03:33:03 - 04:03:03 -2493
The Dalles 03:48:04 -35.2 Dark Down 50.6 125.5 Up 03:33:04 - 04:03:04 -2500
Pasco 03:47:56 -36.6 Dark Down 51.3 128.6 Up 03:32:56 - 04:02:56 -2510
George/Umatilla 03:47:58 -36.5 Dark Down 51.4 128.1 Up 03:32:58 - 04:02:58 -2530
PNWRO 03:47:56 -36.8 Dark Down 51.6 128.7 Up 03:32:56 - 04:02:56 -2536
Maupin 03:48:05 -35.3 Dark Down 50.9 125.2 Up 03:33:05 - 04:03:05 -2536
Madras/Culver 03:48:07 -35.3 Dark Down 51.2 124.6 Up 03:33:07 - 04:03:07 -2578
Sisters 03:48:10 -35.0 Dark Down 51.1 123.7 Up 03:33:10 - 04:03:10 -2591
Redmond 03:48:08 -35.3 Dark Down 51.4 124.2 Up 03:33:08 - 04:03:08 -2605
Bend 03:48:10 -35.2 Dark Down 51.4 123.8 Up 03:33:10 - 04:03:10 -2618
Oregon Observatory 03:48:10 -35.1 Dark Down 51.4 123.5 Up 03:33:10 - 04:03:10 -2628
La Pine/Gilchrist 03:48:11 -35.1 Dark Down 51.5 123.2 Up 03:33:11 - 04:03:11 -2642
North Lake 03:48:11 -35.5 Dark Down 52.1 123.4 Up 03:33:11 - 04:03:11 -2696
Chiloquin 03:48:16 -34.8 Dark Down 51.9 121.6 Up 03:33:16 - 04:03:16 -2721
Klamath Falls 03:48:17 -34.9 Dark Down 52.1 121.3 Up 03:33:17 - 04:03:17 -2752
Paisley 03:48:11 -35.8 Dark Down 52.6 123.3 Up 03:33:11 - 04:03:11 -2753
Tulelake 03:48:17 -35.1 Dark Down 52.4 121.4 Up 03:33:17 - 04:03:17 -2784
Lakeview 03:48:12 -35.9 Dark Down 53.0 123.0 Up 03:33:12 - 04:03:12 -2801
Cedarville 03:48:14 -36.1 Dark Down 53.5 122.4 Up 03:33:14 - 04:03:14 -2861
Fall River/Burney 03:48:19 -35.2 Dark Down 53.0 120.5 Up 03:33:19 - 04:03:19 -2862
Susanville 03:48:18 -35.7 Dark Down 53.8 120.6 Up 03:33:18 - 04:03:18 -2939
Greenville 03:48:21 -35.5 Dark Down 53.7 119.9 Up 03:33:21 - 04:03:21 -2953
Gimple 03:48:20 -35.6 Dark Down 53.8 120.0 Up 03:33:20 - 04:03:20 -2956
Quincy 03:48:21 -35.5 Dark Down 53.8 119.7 Up 03:33:21 - 04:03:21 -2970
Portola 03:48:20 -35.8 Dark Down 54.2 120.1 Up 03:33:20 - 04:03:20 -2996
Reno 03:48:18 -36.3 Dark Down 54.8 120.5 Up 03:33:18 - 04:03:18 -3040
Carson City 03:48:20 -36.4 Dark Down 55.0 120.1 Up 03:33:20 - 04:03:20 -3072
Gardnerville 03:48:20 -36.4 Dark Down 55.1 119.9 Up 03:33:20 - 04:03:20 -3095
Yerington 03:48:18 -36.8 Dark Down 55.5 120.7 Up 03:33:18 - 04:03:18 -3110
Hawthorne 03:48:17 -37.2 Dark Down 56.1 120.7 Up 03:33:17 - 04:03:17 -3168
Lee Vining 03:48:21 -36.8 Dark Down 56.0 119.4 Up 03:33:21 - 04:03:21 -3201
Tonopah 03:48:14 -38.3 Dark Down 57.3 121.8 Up 03:33:14 - 04:03:14 -3255
Bishop 03:48:20 -37.4 Dark Down 56.8 119.5 Up 03:33:20 - 04:03:20 -3278
Lone Pine 03:48:21 -37.6 Dark Down 57.4 118.9 Up 03:33:21 - 04:03:21 -3357
Beatty 03:48:16 -38.7 Dark Down 58.2 120.9 Up 03:33:16 - 04:03:16 -3374
CPSLO 03:48:32 -35.5 Dark Down 56.2 114.2 Up 03:33:32 - 04:03:32 -3384
Indian Springs 03:48:13 -39.5 Dark Down 59.1 121.8 Up 03:33:13 - 04:03:13 -3440
Niwot 03:47:28 -47.4 Dark Down 62.7 142.7 Up 03:32:28 - 04:02:28 -3448
Henderson 03:48:12 -40.1 Dark Down 59.8 121.9 Up 03:33:12 - 04:03:12 -3511
Wildwood 03:48:29 -37.1 Dark Down 58.2 114.7 Up 03:33:29 - 04:03:29 -3565
Searchlight/Boulder City 03:48:14 -40.1 Dark Down 60.2 121.1 Up 03:33:14 - 04:03:14 -3566
Laughlin/Bullhead City 03:48:13 -40.4 Dark Down 60.6 121.1 Up 03:33:13 - 04:03:13 -3605
Patrick 03:48:10 -41.0 Dark Down 60.9 122.5 Up 03:33:10 - 04:03:10 -3606
Kingman/Dolan Springs 03:48:11 -40.8 Dark Down 60.9 121.9 Up 03:33:11 - 04:03:11 -3620
Mohave Valley 03:48:14 -40.4 Dark Down 60.7 120.7 Up 03:33:14 - 04:03:14 -3631
DCO 03:48:08 -41.5 Dark Down 61.6 123.0 Up 03:33:08 - 04:03:08 -3658
Idyllwild 03:48:24 -38.6 Dark Down 59.8 116.3 Up 03:33:24 - 04:03:24 -3663
Lake Havasu City 03:48:14 -40.6 Dark Down 61.1 120.5 Up 03:33:14 - 04:03:14 -3676
Parker 03:48:14 -40.6 Dark Down 61.3 119.9 Up 03:33:14 - 04:03:14 -3710
Blythe 03:48:17 -40.3 Dark Down 61.4 118.7 Up 03:33:17 - 04:03:17 -3748
Calipatria 03:48:22 -39.5 Dark Down 60.9 116.8 Up 03:33:22 - 04:03:22 -3762
Yuma 03:48:20 -40.2 Dark Down 61.8 117.2 Up 03:33:20 - 04:03:20 -3833

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 149349, (2017/12/11 03:47UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 19.48 110
Menkar         03:02:16.8 +04:05:22  2.5 13.35 135
57Del Ari      03:11:37.9 +19:43:36  4.3  2.72 128
PPM 118904     03:12:16.1 +17:18:03  8.5  0.58 129
PPM 118915     03:13:00.1 +17:07:55  8.7  0.37 129
PPM 118949     03:15:05.8 +17:03:57 10.3  0.14 128
149349         03:14:31.4 +17:05:47 15.4       128
Positions are for J2000

Event circumstances last updated at 2017/05/15 18:03:54 UT

Marc W. Buie, Southwest Research Institute

RECON