RECON: TNO occultation with 04HX78

Event between 04HX78 and star UC4-380-083770 with event index number of 189851

Geocentric closest approach at 2019/06/01 06:36:28 UTC

J2000 position of star is 17:26:48.2 -14:00:56
Equinox of date position of star is 17:27:47.6 -14:01:46
Stellar brightness R=11.4, use SENSEUP=8
Star is 142 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 33.5 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 23.5 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 722 seconds.
The 1-sigma cross-track error in the shadow position is 3640 km.
The sky-plane scale is 23610.9 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.9 km assuming a 5% albedo -- 6.1 sec chord
Diameter=58.7 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04HX78, (2019/06/01 06:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:24  0.9 18.29 153
35Eta Oph      17:11:29.6 -15:44:52  2.6  4.32 146
53Nu Ser       17:21:55.2 -12:51:54  4.0  1.86 143
PPM 233132     17:30:13.5 -14:05:42  8.2  0.57 142
PPM 233094     17:28:30.6 -14:03:02  9.4  0.15 142
04HX78         17:27:54.4 -14:01:51 11.4       142
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 1.2 sigma about the mid-time.
The median site spacing is 15.2 km RECON observability=1.0 and success probability=5.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:38:37 -17.0 AT Down 21.0 146.6 Low 06:23:37 - 06:53:37 5606
Tonasket 06:38:37 -17.2 AT Down 21.2 146.5 Low 06:23:37 - 06:53:37 5592
Okanogan 06:38:39 -17.5 AT Down 21.4 146.3 Low 06:23:39 - 06:53:39 5569
Brewster 06:38:39 -17.7 AT Down 21.5 146.1 Low 06:23:39 - 06:53:39 5548
Manson/Chelan 06:38:41 -17.8 AT Down 21.6 145.7 Low 06:23:41 - 06:53:41 5529
Entiat 06:38:40 -18.0 Dark Down 21.7 145.5 Low 06:23:40 - 06:53:40 5514
Wenatchee 06:38:42 -18.3 Dark Down 21.9 145.4 Low 06:23:42 - 06:53:42 5496
Ellensburg 06:38:42 -18.6 Dark Down 22.2 145.1 Low 06:23:42 - 06:53:42 5466
Pasco 06:38:40 -19.6 Dark Down 23.3 146.3 Low 06:23:40 - 06:53:40 5446
Yakima 06:38:43 -19.0 Dark Down 22.5 145.0 Low 06:23:43 - 06:53:43 5440
PNWRO 06:38:39 -19.9 Dark Down 23.6 146.4 Low 06:23:39 - 06:53:39 5435
Toppenish/White Swan 06:38:43 -19.2 Dark Down 22.7 145.1 Low 06:23:43 - 06:53:43 5429
George/Umatilla 06:38:41 -19.9 Dark Down 23.5 146.0 Low 06:23:41 - 06:53:41 5420
Goldendale 06:38:46 -19.6 Dark Down 23.0 144.6 Low 06:23:46 - 06:53:46 5385
The Dalles 06:38:46 -19.8 Dark Down 23.1 144.2 Low 06:23:46 - 06:53:46 5363
Maupin 06:38:47 -20.2 Dark Down 23.4 144.2 Low 06:23:47 - 06:53:47 5338
Niwot 06:38:03 -27.7 Dark Down 33.4 159.1 Up 06:23:03 - 06:53:03 5310
Madras/Culver 06:38:47 -20.7 Dark Down 23.9 144.0 Low 06:23:47 - 06:53:47 5301
Redmond 06:38:48 -21.0 Dark Down 24.1 143.8 Low 06:23:48 - 06:53:48 5276
Sisters 06:38:50 -20.9 Dark Down 23.9 143.5 Low 06:23:50 - 06:53:50 5269
Bend 06:38:49 -21.2 Dark Down 24.2 143.7 Low 06:23:49 - 06:53:49 5259
Oregon Observatory 06:38:49 -21.3 Dark Down 24.3 143.5 Low 06:23:49 - 06:53:49 5244
La Pine/Gilchrist 06:38:50 -21.5 Dark Down 24.5 143.4 Low 06:23:50 - 06:53:50 5229
North Lake 06:38:49 -22.0 Dark Down 25.1 143.8 Low 06:23:49 - 06:53:49 5212
Paisley 06:38:49 -22.6 Dark Down 25.7 144.0 Low 06:23:49 - 06:53:49 5182
Lakeview 06:38:49 -23.2 Dark Down 26.2 144.1 Low 06:23:49 - 06:53:49 5150
Chiloquin 06:38:53 -22.4 Dark Down 25.2 142.7 Low 06:23:53 - 06:53:53 5145
Klamath Falls 06:38:53 -22.8 Dark Down 25.5 142.7 Low 06:23:53 - 06:53:53 5123
Tulelake 06:38:52 -23.1 Dark Down 25.9 142.9 Low 06:23:52 - 06:53:52 5110
Cedarville 06:38:49 -23.8 Dark Down 26.8 144.0 Low 06:23:49 - 06:53:49 5108
Fall River/Burney 06:38:53 -24.0 Dark Down 26.6 142.7 Low 06:23:53 - 06:53:53 5047
Susanville 06:38:52 -24.7 Dark Down 27.5 143.2 Low 06:23:52 - 06:53:52 5017
Gimple 06:38:53 -24.9 Dark Down 27.6 143.0 Low 06:23:53 - 06:53:53 4992
Greenville 06:38:53 -24.9 Dark Down 27.6 142.9 Low 06:23:53 - 06:53:53 4991
Portola 06:38:52 -25.4 Dark Down 28.0 143.2 Low 06:23:52 - 06:53:52 4977
Quincy 06:38:53 -25.1 Dark Down 27.7 142.8 Low 06:23:53 - 06:53:53 4976
Reno 06:38:50 -25.8 Dark Down 28.5 143.8 Low 06:23:50 - 06:53:50 4972
Carson City 06:38:51 -26.1 Dark Down 28.8 143.7 Low 06:23:51 - 06:53:51 4946
Yerington 06:38:49 -26.5 Dark Down 29.3 144.2 Low 06:23:49 - 06:53:49 4946
Gardnerville 06:38:51 -26.4 Dark Down 29.1 143.7 Low 06:23:51 - 06:53:51 4929
Hawthorne 06:38:48 -27.0 Dark Down 29.9 144.6 Low 06:23:48 - 06:53:48 4923
Tonopah 06:38:44 -27.8 Dark Down 30.9 145.8 Up 06:23:44 - 06:53:44 4919
Lee Vining 06:38:50 -27.5 Dark Down 30.1 143.9 Up 06:23:50 - 06:53:50 4870
Beatty 06:38:44 -29.1 Dark Down 32.1 145.9 Up 06:23:44 - 06:53:44 4842
Bishop 06:38:49 -28.2 Dark Down 31.0 144.4 Up 06:23:49 - 06:53:49 4841
Indian Springs 06:38:41 -29.6 Dark Down 32.8 146.9 Up 06:23:41 - 06:53:41 4840
Henderson 06:38:39 -30.3 Dark Down 33.6 147.4 Up 06:23:39 - 06:53:39 4814
Patrick 06:38:35 -31.1 Dark Down 34.6 148.3 Up 06:23:35 - 06:53:35 4791
Lone Pine 06:38:49 -29.0 Dark Down 31.7 144.5 Up 06:23:49 - 06:53:49 4790
DCO 06:38:34 -31.6 Dark Down 35.1 149.0 Up 06:23:34 - 06:53:34 4783
Searchlight/Boulder City 06:38:39 -30.9 Dark Down 34.1 147.3 Up 06:23:39 - 06:53:39 4772
Kingman/Dolan Springs 06:38:36 -31.3 Dark Down 34.7 148.1 Up 06:23:36 - 06:53:36 4770
Laughlin/Bullhead City 06:38:38 -31.2 Dark Down 34.5 147.5 Up 06:23:38 - 06:53:38 4756
Mohave Valley 06:38:39 -31.5 Dark Down 34.7 147.4 Up 06:23:39 - 06:53:39 4735
Lake Havasu City 06:38:38 -31.9 Dark Down 35.2 147.5 Up 06:23:38 - 06:53:38 4709
Parker 06:38:38 -32.3 Dark Down 35.5 147.4 Up 06:23:38 - 06:53:38 4682
Blythe 06:38:39 -32.7 Dark Down 35.8 146.9 Up 06:23:39 - 06:53:39 4633
CPSLO 06:38:57 -29.5 Dark Down 31.5 141.5 Up 06:23:57 - 06:53:57 4628
Idyllwild 06:38:46 -32.1 Dark Down 34.7 144.8 Up 06:23:46 - 06:53:46 4596
Wildwood 06:38:52 -31.2 Dark Down 33.5 143.0 Up 06:23:52 - 06:53:52 4580
Calipatria 06:38:43 -33.0 Dark Down 35.8 145.7 Up 06:23:43 - 06:53:43 4573
Yuma 06:38:40 -33.6 Dark Down 36.5 146.5 Up 06:23:40 - 06:53:40 4558

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 04HX78, (2019/06/01 06:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.29 153
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.32 146
53Nu Ser       17:20:49.7 -12:50:49  4.0  1.86 143
PPM 233132     17:29:07.3 -14:04:50  8.2  0.57 142
PPM 233094     17:27:24.5 -14:02:07  9.4  0.15 142
04HX78         17:26:48.2 -14:00:56 11.4       142
Positions are for J2000

Event circumstances last updated at 2017/06/02 16:24:16 UT

Marc W. Buie, Southwest Research Institute

RECON