RECON: TNO occultation with 129772

Event between (129772) 99HR11 and star UC4-393-059103 with event index number of 190850

Geocentric closest approach at 2019/05/30 07:58:18 UTC

J2000 position of star is 14:20:17.6 -11:25:19
Equinox of date position of star is 14:21:15.6 -11:30:13
Stellar brightness R=16.4, use SENSEUP=128
Star is 162 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 42.2 AU from the Sun and 41.3 AU from the Earth.
The TNO is moving 20.5 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 395 seconds.
The 1-sigma cross-track error in the shadow position is 4498 km.
The sky-plane scale is 29964.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 10.7 sec chord
Diameter=89.3 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 129772, (2019/05/30 07:58UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.1 -11:15:43  1.0 13.51 171
2 Lib          14:24:28.5 -11:48:06  6.2  0.82 162
PPM 228659     14:22:18.9 -11:29:12  8.2  0.24 162
PPM 228638     14:21:10.0 -11:22:37  9.5  0.14 162
129772         14:21:20.3 -11:30:37 16.4       162
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 2.3 sigma about the mid-time.
The median site spacing is 12.0 km RECON observability=1.0 and success probability=4.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:57:49 -19.3 Dark Down 23.2 214.9 Low 07:42:49 - 08:12:49 3500
Tonasket 07:57:48 -19.6 Dark Down 23.4 215.0 Low 07:42:48 - 08:12:48 3490
Okanogan 07:57:47 -19.9 Dark Down 23.7 214.9 Low 07:42:47 - 08:12:47 3474
Brewster 07:57:47 -20.2 Dark Down 24.0 214.8 Low 07:42:47 - 08:12:47 3460
Manson/Chelan 07:57:48 -20.4 Dark Down 24.3 214.5 Low 07:42:48 - 08:12:48 3447
Entiat 07:57:47 -20.6 Dark Down 24.5 214.5 Low 07:42:47 - 08:12:47 3437
Wenatchee 07:57:46 -20.8 Dark Down 24.8 214.4 Low 07:42:46 - 08:12:46 3424
Ellensburg 07:57:46 -21.3 Dark Down 25.2 214.3 Low 07:42:46 - 08:12:46 3403
Yakima 07:57:45 -21.7 Dark Down 25.6 214.4 Low 07:42:45 - 08:12:45 3384
Pasco 07:57:40 -22.0 Dark Down 25.3 215.9 Low 07:42:40 - 08:12:40 3384
Toppenish/White Swan 07:57:44 -21.9 Dark Down 25.7 214.6 Low 07:42:44 - 08:12:44 3376
PNWRO 07:57:38 -22.2 Dark Down 25.4 216.2 Low 07:42:38 - 08:12:38 3374
George/Umatilla 07:57:40 -22.3 Dark Down 25.6 215.8 Low 07:42:40 - 08:12:40 3365
Goldendale 07:57:44 -22.4 Dark Down 26.3 214.4 Low 07:42:44 - 08:12:44 3344
The Dalles 07:57:44 -22.7 Dark Down 26.6 214.1 Low 07:42:44 - 08:12:44 3329
Maupin 07:57:42 -23.1 Dark Down 26.9 214.3 Low 07:42:42 - 08:12:42 3310
Madras/Culver 07:57:41 -23.6 Dark Down 27.4 214.4 Low 07:42:41 - 08:12:41 3282
Redmond 07:57:41 -24.0 Dark Down 27.7 214.4 Low 07:42:41 - 08:12:41 3264
Sisters 07:57:42 -23.9 Dark Down 27.9 214.0 Low 07:42:42 - 08:12:42 3260
Bend 07:57:40 -24.2 Dark Down 28.0 214.4 Low 07:42:40 - 08:12:40 3251
Oregon Observatory 07:57:41 -24.4 Dark Down 28.1 214.3 Low 07:42:41 - 08:12:41 3241
La Pine/Gilchrist 07:57:41 -24.6 Dark Down 28.3 214.3 Low 07:42:41 - 08:12:41 3230
North Lake 07:57:37 -25.0 Dark Down 28.5 215.0 Low 07:42:37 - 08:12:37 3214
Paisley 07:57:35 -25.6 Dark Down 28.8 215.5 Low 07:42:35 - 08:12:35 3189
Niwot 07:56:38 -26.7 Dark Down 22.9 230.5 Low 07:41:38 - 08:11:38 3180
Chiloquin 07:57:38 -25.7 Dark Down 29.4 214.3 Low 07:42:38 - 08:12:38 3166
Lakeview 07:57:33 -26.1 Dark Down 29.1 215.9 Low 07:42:33 - 08:12:33 3164
Klamath Falls 07:57:37 -26.0 Dark Down 29.7 214.5 Low 07:42:37 - 08:12:37 3149
Tulelake 07:57:35 -26.3 Dark Down 29.8 214.8 Low 07:42:35 - 08:12:35 3138
Cedarville 07:57:30 -26.7 Dark Down 29.6 216.3 Low 07:42:30 - 08:12:30 3130
Fall River/Burney 07:57:33 -27.2 Dark Down 30.5 215.2 Up 07:42:33 - 08:12:33 3088
Susanville 07:57:29 -27.8 Dark Down 30.7 216.2 Up 07:42:29 - 08:12:29 3062
Gimple 07:57:30 -28.1 Dark Down 31.0 216.1 Up 07:42:30 - 08:12:30 3043
Greenville 07:57:29 -28.1 Dark Down 31.0 216.0 Up 07:42:29 - 08:12:29 3042
Quincy 07:57:28 -28.3 Dark Down 31.2 216.0 Up 07:42:28 - 08:12:28 3031
Portola 07:57:27 -28.4 Dark Down 31.1 216.6 Up 07:42:27 - 08:12:27 3029
Reno 07:57:23 -28.7 Dark Down 31.0 217.3 Up 07:42:23 - 08:12:23 3022
Carson City 07:57:23 -29.1 Dark Down 31.3 217.5 Up 07:42:23 - 08:12:23 3001
Yerington 07:57:20 -29.3 Dark Down 31.1 218.1 Up 07:42:20 - 08:12:20 2997
Gardnerville 07:57:22 -29.3 Dark Down 31.4 217.6 Up 07:42:22 - 08:12:22 2987
Hawthorne 07:57:16 -29.7 Dark Down 31.2 218.8 Up 07:42:16 - 08:12:16 2976
Tonopah 07:57:10 -30.1 Dark Down 30.9 220.4 Up 07:42:10 - 08:12:10 2964
Lee Vining 07:57:17 -30.3 Dark Down 31.9 218.6 Up 07:42:17 - 08:12:17 2936
Bishop 07:57:13 -30.9 Dark Down 32.0 219.5 Up 07:42:13 - 08:12:13 2908
Beatty 07:57:06 -31.3 Dark Down 31.5 221.3 Up 07:42:06 - 08:12:06 2898
Indian Springs 07:57:00 -31.5 Dark Down 31.2 222.4 Up 07:42:00 - 08:12:00 2889
Lone Pine 07:57:09 -31.6 Dark Down 32.5 220.1 Up 07:42:09 - 08:12:09 2865
Henderson 07:56:57 -32.0 Dark Down 31.2 223.3 Up 07:41:57 - 08:11:57 2863
Patrick 07:56:51 -32.6 Dark Down 31.1 224.6 Up 07:41:51 - 08:11:51 2834
Searchlight/Boulder City 07:56:55 -32.6 Dark Down 31.6 223.6 Up 07:41:55 - 08:11:55 2827
DCO 07:56:48 -32.8 Dark Down 30.9 225.4 Up 07:41:48 - 08:11:48 2822
Kingman/Dolan Springs 07:56:52 -32.8 Dark Down 31.3 224.5 Up 07:41:52 - 08:11:52 2818
Laughlin/Bullhead City 07:56:53 -32.9 Dark Down 31.7 224.0 Up 07:41:53 - 08:11:53 2812
Mohave Valley 07:56:53 -33.1 Dark Down 31.8 224.1 Up 07:41:53 - 08:11:53 2794
Lake Havasu City 07:56:50 -33.5 Dark Down 32.0 224.5 Up 07:41:50 - 08:11:50 2770
CPSLO 07:57:15 -33.0 Dark Down 34.8 218.1 Up 07:42:15 - 08:12:15 2749
Parker 07:56:49 -33.9 Dark Down 32.2 224.7 Up 07:41:49 - 08:11:49 2748
Blythe 07:56:48 -34.4 Dark Down 32.8 224.7 Up 07:41:48 - 08:11:48 2710
Wildwood 07:57:04 -34.2 Dark Down 34.7 220.7 Up 07:42:04 - 08:12:04 2695
Idyllwild 07:56:57 -34.4 Dark Down 33.9 222.6 Up 07:41:57 - 08:11:57 2694
Calipatria 07:56:51 -35.0 Dark Down 33.7 224.0 Up 07:41:51 - 08:11:51 2666
Yuma 07:56:46 -35.3 Dark Down 33.5 225.1 Up 07:41:46 - 08:11:46 2647

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 129772, (2019/05/30 07:58UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 13.51 171
2 Lib          14:23:25.6 -11:42:52  6.2  0.82 162
PPM 228659     14:21:16.1 -11:23:55  8.2  0.24 162
PPM 228638     14:20:07.4 -11:17:19  9.5  0.14 162
129772         14:20:17.6 -11:25:19 16.4       162
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:59:16 UT

Marc W. Buie, Southwest Research Institute

RECON