RECON: TNO occultation with 119315

Event between (119315) 01SQ73 and star UC4-655-045769 with event index number of 180694

Geocentric closest approach at 2019/02/19 03:33:56 UTC

J2000 position of star is 06:50:19.1 +40:59:30
Equinox of date position of star is 06:51:34.6 +40:58:10
Stellar brightness R=16.3, use SENSEUP=128
Star is 45 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 19.6 AU from the Sun and 19.0 AU from the Earth.
The TNO is moving 15.0 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 588 seconds.
The 1-sigma cross-track error in the shadow position is 4554 km.
The sky-plane scale is 13788.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 4.8 sec chord
Diameter=29.6 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 119315, (2019/02/19 03:34UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:29.1 +27:58:42  1.1 17.17  30
34Bet Aur      06:00:56.0 +44:56:50  1.9 10.08  55
58Psi7Aur      06:52:07.0 +41:45:25  6.0  0.79  45
PPM 049392     06:52:51.0 +40:50:35  8.3  0.26  45
PPM 049371     06:51:19.8 +40:58:27  8.9  0.06  45
119315         06:51:39.6 +40:58:05 16.3        45
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 1.5 sigma about the mid-time.
The median site spacing is 23.1 km RECON observability=1.0 and success probability=9.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 03:35:02 -22.2 Dark Up 74.2 112.8 Up 03:20:02 - 03:50:02 3866
Tonasket 03:35:02 -22.3 Dark Up 74.3 112.0 Up 03:20:02 - 03:50:02 3845
Okanogan 03:35:04 -22.2 Dark Up 74.3 110.7 Up 03:20:04 - 03:50:04 3821
Brewster 03:35:04 -22.1 Dark Up 74.3 109.5 Up 03:20:04 - 03:50:04 3805
Manson/Chelan 03:35:04 -21.9 Dark Up 74.1 108.2 Up 03:20:04 - 03:50:04 3802
Entiat 03:35:04 -21.9 Dark Up 74.1 107.4 Up 03:20:04 - 03:50:04 3785
Wenatchee 03:35:04 -21.9 Dark Up 74.1 106.4 Up 03:20:04 - 03:50:04 3767
Ellensburg 03:35:04 -21.8 Dark Up 74.1 104.7 Up 03:20:04 - 03:50:04 3741
Yakima 03:35:04 -21.8 Dark Up 74.2 103.3 Up 03:20:04 - 03:50:04 3706
Toppenish/White Swan 03:35:04 -21.9 Dark Up 74.3 102.7 Up 03:20:04 - 03:50:04 3680
Goldendale 03:35:20 -21.7 Dark Up 74.2 100.4 Up 03:20:20 - 03:50:20 3644
The Dalles 03:35:23 -21.5 Dark Up 74.0 99.2 Up 03:20:23 - 03:50:23 3640
Pasco 03:35:04 -22.8 Dark Up 75.2 104.0 Up 03:20:04 - 03:50:04 3612
Maupin 03:35:25 -21.6 Dark Up 74.1 97.9 Up 03:20:25 - 03:50:25 3598
George/Umatilla 03:35:04 -22.7 Dark Up 75.2 102.5 Up 03:20:04 - 03:50:04 3593
PNWRO 03:35:04 -23.0 Dark Up 75.4 103.4 Up 03:20:04 - 03:50:04 3580
Madras/Culver 03:35:27 -21.7 Dark Up 74.2 95.9 Up 03:20:27 - 03:50:27 3550
Sisters 03:35:30 -21.4 Dark Up 73.9 94.4 Up 03:20:30 - 03:50:30 3540
Redmond 03:35:29 -21.7 Dark Up 74.2 94.6 Up 03:20:29 - 03:50:29 3520
Bend 03:35:30 -21.6 Dark Up 74.1 93.8 Up 03:20:30 - 03:50:30 3507
Oregon Observatory 03:35:32 -21.5 Dark Up 74.0 93.0 Up 03:20:32 - 03:50:32 3497
La Pine/Gilchrist 03:35:32 -21.5 Dark Up 74.0 92.3 Up 03:20:32 - 03:50:32 3482
North Lake 03:35:31 -22.0 Dark Up 74.5 91.2 Up 03:20:31 - 03:50:31 3415
Chiloquin 03:35:39 -21.3 Dark Up 73.8 88.2 Up 03:20:39 - 03:50:39 3398
Klamath Falls 03:35:40 -21.4 Dark Up 73.8 87.1 Up 03:20:40 - 03:50:40 3363
Paisley 03:35:32 -22.3 Dark Up 74.7 89.5 Up 03:20:32 - 03:50:32 3349
Tulelake 03:35:40 -21.7 Dark Up 74.0 86.3 Up 03:20:40 - 03:50:40 3325
Lakeview 03:35:33 -22.5 Dark Up 74.9 87.7 Up 03:20:33 - 03:50:33 3294
Fall River/Burney 03:35:43 -21.8 Dark Up 74.0 83.2 Up 03:20:43 - 03:50:43 3238
Cedarville 03:35:36 -22.7 Dark Up 75.0 85.4 Up 03:20:36 - 03:50:36 3226
Susanville 03:35:42 -22.4 Dark Up 74.5 81.2 Up 03:20:42 - 03:50:42 3146
Greenville 03:35:45 -22.2 Dark Up 74.2 80.1 Up 03:20:45 - 03:50:45 3134
Gimple 03:35:45 -22.3 Dark Up 74.3 80.2 Up 03:20:45 - 03:50:45 3130
Quincy 03:35:45 -22.2 Dark Up 74.2 79.4 Up 03:20:45 - 03:50:45 3116
Portola 03:35:44 -22.6 Dark Up 74.5 79.1 Up 03:20:44 - 03:50:44 3082
Reno 03:35:42 -23.1 Dark Up 75.0 78.2 Up 03:20:42 - 03:50:42 3026
Carson City 03:35:44 -23.1 Dark Up 74.9 76.9 Up 03:20:44 - 03:50:44 2992
Gardnerville 03:35:45 -23.2 Dark Up 74.9 76.0 Up 03:20:45 - 03:50:45 2967
Yerington 03:35:41 -23.6 Dark Up 75.3 76.1 Up 03:20:41 - 03:50:41 2944
Hawthorne 03:35:41 -24.1 Dark Up 75.6 74.3 Up 03:20:41 - 03:50:41 2876
Lee Vining 03:35:45 -23.8 Dark Up 75.1 72.3 Up 03:20:45 - 03:50:45 2847
Tonopah 03:35:36 -25.2 Dark Up 76.5 72.1 Up 03:20:36 - 03:50:36 2767
Bishop 03:35:45 -24.4 Dark Up 75.4 69.9 Up 03:20:45 - 03:50:45 2756
CPSLO 03:36:03 -22.7 Dark Up 73.0 64.3 Up 03:21:03 - 03:51:03 2675
Lone Pine 03:35:46 -24.7 Dark Up 75.4 67.0 Up 03:20:46 - 03:50:46 2669
Beatty 03:35:39 -25.7 Dark Up 76.5 67.3 Up 03:20:39 - 03:50:39 2636
Indian Springs 03:35:34 -26.6 Dark Up 77.1 65.2 Up 03:20:34 - 03:50:34 2555
Niwot 03:34:30 -33.9 Dark Up 85.9 75.9 Up 03:19:30 - 03:49:30 2472
Henderson 03:35:33 -27.2 Dark Up 77.4 62.4 Up 03:20:33 - 03:50:33 2472
Wildwood 03:35:58 -24.5 Dark Up 73.9 59.2 Up 03:20:58 - 03:50:58 2460
Searchlight/Boulder City 03:35:34 -27.3 Dark Up 77.1 60.1 Up 03:20:34 - 03:50:34 2415
Laughlin/Bullhead City 03:35:34 -27.6 Dark Up 77.2 58.6 Up 03:20:34 - 03:50:34 2370
Patrick 03:35:30 -28.1 Dark Up 77.8 58.6 Up 03:20:30 - 03:50:30 2361
Kingman/Dolan Springs 03:35:31 -28.0 Dark Up 77.6 57.9 Up 03:20:31 - 03:50:31 2349
Mohave Valley 03:35:35 -27.6 Dark Up 77.1 57.5 Up 03:20:35 - 03:50:35 2344
Idyllwild 03:35:50 -26.0 Dark Up 75.0 56.2 Up 03:20:50 - 03:50:50 2334
DCO 03:35:26 -28.7 Dark Up 78.2 56.3 Up 03:20:26 - 03:50:26 2300
Lake Havasu City 03:35:35 -27.9 Dark Up 77.1 55.7 Up 03:20:35 - 03:50:35 2294
Parker 03:35:36 -27.9 Dark Up 76.9 54.4 Up 03:20:36 - 03:50:36 2259
Blythe 03:35:40 -27.7 Dark Up 76.4 53.1 Up 03:20:40 - 03:50:40 2222
Calipatria 03:35:46 -27.0 Dark Up 75.5 52.8 Up 03:20:46 - 03:50:46 2219
Yuma 03:35:43 -27.8 Dark Up 75.8 50.2 Up 03:20:43 - 03:50:43 2135

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 119315, (2019/02/19 03:34UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 17.17  30
34Bet Aur      05:59:31.6 +44:56:51  1.9 10.08  55
58Psi7Aur      06:50:45.9 +41:46:50  6.0  0.79  45
PPM 049392     06:51:30.6 +40:52:02  8.3  0.26  45
PPM 049371     06:49:59.2 +40:59:51  8.9  0.06  45
119315         06:50:19.1 +40:59:30 16.3        45
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:15:04 UT

Marc W. Buie, Southwest Research Institute

RECON