RECON: TNO occultation with 307261

Event between (307261) 02MS4 and star UC4-418-095031 with event index number of 204017

Geocentric closest approach at 2019/07/09 04:16:06 UTC

J2000 position of star is 18:45:19.2 -06:24:13
Equinox of date position of star is 18:46:15.9 -06:23:03
Stellar brightness R=15.8, use SENSEUP=128
Star is 87 degrees from the moon. Moon is 47% illuminated.
TNO apparent brightness V=20.4

[RECON map]
TNO is 46.6 AU from the Sun and 45.6 AU from the Earth.
The TNO is moving 25.1 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 384 seconds.
The 1-sigma cross-track error in the shadow position is 2777 km.
The sky-plane scale is 33085.2 km/arcsec.

The TNO has an absolute magnitude Hv=3.7
Diameter=1096.5 km assuming a 5% albedo -- 43.7 sec chord
Diameter=447.7 km assuming a 30% albedo -- 17.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 307261, (2019/07/09 04:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.4 -26:28:25  0.9 38.04  57
60Bet Oph      17:44:26.3 +04:33:38  2.8 18.94  72
PPM 202138     18:48:31.5 -05:40:58  4.6  0.88  88
PPM 202094     18:45:43.8 -06:30:53  6.8  0.21  87
PPM 202118     18:46:48.2 -06:26:00  8.6  0.12  87
307261         18:46:22.1 -06:22:56 15.8        87
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 43.6 km RECON observability=0.1 and success probability=3.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:17:54 -2.9 CT Up 19.9 126.6 Really Low 04:02:54 - 04:32:54 -3628
Tonasket 04:17:55 -3.0 CT Up 20.0 126.5 Low 04:02:55 - 04:32:55 -3642
Okanogan 04:17:56 -3.2 CT Up 20.2 126.3 Low 04:02:56 - 04:32:56 -3663
Brewster 04:17:57 -3.2 CT Up 20.2 126.0 Low 04:02:57 - 04:32:57 -3680
Manson/Chelan 04:17:58 -3.2 CT Up 20.1 125.6 Low 04:02:58 - 04:32:58 -3693
Entiat 04:17:59 -3.3 CT Up 20.2 125.5 Low 04:02:59 - 04:32:59 -3707
Wenatchee 04:18:00 -3.4 CT Up 20.3 125.3 Low 04:03:00 - 04:33:00 -3723
Ellensburg 04:18:02 -3.5 CT Up 20.4 125.0 Low 04:03:02 - 04:33:02 -3750
Yakima 04:18:03 -3.8 CT Up 20.7 124.9 Low 04:03:03 - 04:33:03 -3776
Toppenish/White Swan 04:18:03 -4.0 CT Up 20.9 125.0 Low 04:03:03 - 04:33:03 -3790
Pasco 04:18:00 -4.8 CT Up 21.7 126.0 Low 04:03:00 - 04:33:00 -3795
PNWRO 04:18:00 -5.1 CT Up 21.9 126.2 Low 04:03:00 - 04:33:00 -3811
George/Umatilla 04:18:02 -4.9 CT Up 21.7 125.8 Low 04:03:02 - 04:33:02 -3817
Goldendale 04:18:05 -4.1 CT Up 21.0 124.4 Low 04:03:05 - 04:33:05 -3826
The Dalles 04:18:07 -4.1 CT Up 20.9 124.1 Low 04:03:07 - 04:33:07 -3842
Maupin 04:18:07 -4.4 CT Up 21.2 124.0 Low 04:03:07 - 04:33:07 -3870
Madras/Culver 04:18:10 -4.7 CT Up 21.5 123.8 Low 04:03:10 - 04:33:10 -3906
Sisters 04:18:11 -4.7 CT Up 21.4 123.3 Low 04:03:11 - 04:33:11 -3929
Redmond 04:18:10 -4.9 CT Up 21.6 123.7 Low 04:03:10 - 04:33:10 -3930
Bend 04:18:11 -5.0 CT Up 21.7 123.5 Low 04:03:11 - 04:33:11 -3945
Oregon Observatory 04:18:12 -5.0 CT Up 21.7 123.3 Low 04:03:12 - 04:33:12 -3957
La Pine/Gilchrist 04:18:13 -5.1 CT Up 21.8 123.2 Low 04:03:13 - 04:33:13 -3971
North Lake 04:18:12 -5.7 CT Up 22.4 123.5 Low 04:03:12 - 04:33:12 -4000
Paisley 04:18:13 -6.3 CT Up 22.9 123.7 Low 04:03:13 - 04:33:13 -4037
Chiloquin 04:18:17 -5.6 CT Up 22.2 122.5 Low 04:03:17 - 04:33:17 -4049
Lakeview 04:18:14 -6.7 CT Up 23.3 123.7 Low 04:03:14 - 04:33:14 -4073
Klamath Falls 04:18:17 -5.8 CT Up 22.4 122.5 Low 04:03:17 - 04:33:17 -4073
Tulelake 04:18:18 -6.2 CT Up 22.7 122.6 Low 04:03:18 - 04:33:18 -4092
Cedarville 04:18:16 -7.2 CT Up 23.8 123.6 Low 04:03:16 - 04:33:16 -4119
Fall River/Burney 04:18:19 -6.8 CT Up 23.3 122.4 Low 04:03:19 - 04:33:19 -4157
Susanville 04:18:19 -7.6 CT Up 24.1 122.8 Low 04:03:19 - 04:33:19 -4201
Niwot 04:17:41 -16.3 AT Up 33.3 136.7 Up 04:02:41 - 04:32:41 -4212
Gimple 04:18:20 -7.7 CT Up 24.1 122.5 Low 04:03:20 - 04:33:20 -4223
Greenville 04:18:21 -7.6 CT Up 24.1 122.4 Low 04:03:21 - 04:33:21 -4223
Quincy 04:18:21 -7.7 CT Up 24.2 122.3 Low 04:03:21 - 04:33:21 -4238
Portola 04:18:20 -8.1 CT Up 24.5 122.7 Low 04:03:20 - 04:33:20 -4246
Reno 04:18:20 -8.7 CT Up 25.1 123.1 Low 04:03:20 - 04:33:20 -4264
Carson City 04:18:20 -8.9 CT Up 25.3 123.0 Low 04:03:20 - 04:33:20 -4291
Yerington 04:18:19 -9.4 CT Up 25.8 123.5 Low 04:03:19 - 04:33:19 -4304
Gardnerville 04:18:21 -9.1 CT Up 25.5 122.9 Low 04:03:21 - 04:33:21 -4309
Hawthorne 04:18:19 -10.0 CT Up 26.4 123.7 Low 04:03:19 - 04:33:19 -4338
Tonopah 04:18:17 -11.2 CT Up 27.6 124.7 Low 04:03:17 - 04:33:17 -4371
Lee Vining 04:18:22 -10.1 CT Up 26.4 123.1 Low 04:03:22 - 04:33:22 -4382
Bishop 04:18:21 -10.9 CT Up 27.2 123.4 Low 04:03:21 - 04:33:21 -4428
Beatty 04:18:18 -12.2 AT Up 28.6 124.6 Low 04:03:18 - 04:33:18 -4461
Indian Springs 04:18:16 -13.1 AT Up 29.5 125.3 Low 04:03:16 - 04:33:16 -4485
Lone Pine 04:18:22 -11.6 CT Up 27.9 123.4 Low 04:03:22 - 04:33:22 -4487
Henderson 04:18:16 -13.8 AT Up 30.2 125.7 Up 04:03:16 - 04:33:16 -4527
Searchlight/Boulder City 04:18:17 -14.3 AT Up 30.6 125.5 Up 04:03:17 - 04:33:17 -4572
Patrick 04:18:14 -14.9 AT Up 31.3 126.4 Up 04:03:14 - 04:33:14 -4575
Kingman/Dolan Springs 04:18:15 -15.0 AT Up 31.3 126.1 Up 04:03:15 - 04:33:15 -4593
Laughlin/Bullhead City 04:18:16 -14.7 AT Up 31.0 125.6 Up 04:03:16 - 04:33:16 -4596
CPSLO 04:18:32 -10.8 CT Up 26.8 120.7 Low 04:03:32 - 04:33:32 -4596
DCO 04:18:13 -15.6 AT Up 32.0 126.8 Up 04:03:13 - 04:33:13 -4599
Mohave Valley 04:18:18 -14.9 AT Up 31.2 125.5 Up 04:03:18 - 04:33:18 -4618
Lake Havasu City 04:18:18 -15.3 AT Up 31.6 125.5 Up 04:03:18 - 04:33:18 -4651
Parker 04:18:18 -15.5 AT Up 31.8 125.4 Up 04:03:18 - 04:33:18 -4679
Wildwood 04:18:29 -12.9 AT Up 28.9 121.8 Low 04:03:29 - 04:33:29 -4690
Idyllwild 04:18:25 -14.3 AT Up 30.4 123.2 Up 04:03:25 - 04:33:25 -4715
Blythe 04:18:20 -15.7 AT Up 31.9 124.9 Up 04:03:20 - 04:33:20 -4723
Calipatria 04:18:23 -15.4 AT Up 31.5 123.8 Up 04:03:23 - 04:33:23 -4765
Yuma 04:18:22 -16.3 AT Up 32.4 124.4 Up 04:03:22 - 04:33:22 -4800

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 307261, (2019/07/09 04:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.04  57
60Bet Oph      17:43:28.3 +04:34:05  2.8 18.94  72
PPM 202138     18:47:28.9 -05:42:19  4.6  0.88  88
PPM 202094     18:44:40.9 -06:32:10  6.8  0.21  87
PPM 202118     18:45:45.3 -06:27:18  8.6  0.12  87
307261         18:45:19.2 -06:24:13 15.8        87
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:09:14 UT

Marc W. Buie, Southwest Research Institute

RECON