RECON: TNO occultation with 04HX78

Event between 04HX78 and star UC4-380-084178 with event index number of 189845

Geocentric closest approach at 2019/05/18 07:47:15 UTC

J2000 position of star is 17:28:05.9 -14:04:25
Equinox of date position of star is 17:29:07.0 -14:05:14
Stellar brightness R=15.2, use SENSEUP=128
Star is 32 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 33.5 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 21.3 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 811 seconds.
The 1-sigma cross-track error in the shadow position is 3671 km.
The sky-plane scale is 23664.9 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.9 km assuming a 5% albedo -- 6.7 sec chord
Diameter=58.7 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04HX78, (2019/05/18 07:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.9 -26:28:24  0.9 18.47  22
35Eta Oph      17:11:29.4 -15:44:51  2.6  4.59  28
53Nu Ser       17:21:55.1 -12:51:54  4.0  2.15  31
PPM 233132     17:30:13.4 -14:05:42  8.2  0.25  33
PPM 233114     17:29:38.1 -14:09:53  9.4  0.13  32
04HX78         17:29:11.9 -14:05:18 15.2        33
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 1.1 sigma about the mid-time.
The median site spacing is 15.3 km RECON observability=1.0 and success probability=3.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:49:40 -21.5 Dark Up 22.2 150.2 Low 07:34:40 - 08:04:40 7519
Tonasket 07:49:40 -21.8 Dark Up 22.4 150.1 Low 07:34:40 - 08:04:40 7506
Okanogan 07:49:41 -22.1 Dark Up 22.6 149.9 Low 07:34:41 - 08:04:41 7482
Brewster 07:49:42 -22.4 Dark Up 22.8 149.7 Low 07:34:42 - 08:04:42 7461
Manson/Chelan 07:49:43 -22.6 Dark Up 22.9 149.3 Low 07:34:43 - 08:04:43 7440
Entiat 07:49:44 -22.8 Dark Up 23.0 149.2 Low 07:34:44 - 08:04:44 7425
Wenatchee 07:49:45 -23.1 Dark Up 23.2 149.0 Low 07:34:45 - 08:04:45 7406
Ellensburg 07:49:45 -23.5 Dark Up 23.5 148.7 Low 07:34:45 - 08:04:45 7375
Pasco 07:49:42 -24.2 Dark Up 24.6 149.9 Low 07:34:42 - 08:04:42 7360
PNWRO 07:49:42 -24.5 Dark Up 24.9 150.1 Low 07:34:42 - 08:04:42 7350
Yakima 07:49:46 -23.9 Dark Up 23.8 148.6 Low 07:34:46 - 08:04:46 7349
Toppenish/White Swan 07:49:47 -24.1 Dark Up 24.1 148.7 Low 07:34:47 - 08:04:47 7339
George/Umatilla 07:49:43 -24.6 Dark Up 24.8 149.6 Low 07:34:43 - 08:04:43 7334
Goldendale 07:49:48 -24.6 Dark Up 24.4 148.2 Low 07:34:48 - 08:04:48 7293
Niwot 07:49:00 -29.2 Dark Up 34.2 163.2 Up 07:34:00 - 08:04:00 7270
The Dalles 07:49:49 -24.8 Dark Up 24.4 147.8 Low 07:34:49 - 08:04:49 7270
Maupin 07:49:50 -25.3 Dark Up 24.8 147.8 Low 07:34:50 - 08:04:50 7245
Madras/Culver 07:49:51 -25.8 Dark Up 25.3 147.6 Low 07:34:51 - 08:04:51 7208
Redmond 07:49:51 -26.2 Dark Up 25.6 147.5 Low 07:34:51 - 08:04:51 7182
Sisters 07:49:53 -26.1 Dark Up 25.4 147.1 Low 07:34:53 - 08:04:53 7174
Bend 07:49:52 -26.4 Dark Up 25.7 147.3 Low 07:34:52 - 08:04:52 7164
Oregon Observatory 07:49:52 -26.5 Dark Up 25.8 147.1 Low 07:34:52 - 08:04:52 7150
La Pine/Gilchrist 07:49:51 -26.7 Dark Up 25.9 147.0 Low 07:34:51 - 08:04:51 7134
North Lake 07:49:51 -27.2 Dark Up 26.5 147.5 Low 07:34:51 - 08:04:51 7119
Paisley 07:49:50 -27.8 Dark Up 27.1 147.7 Low 07:34:50 - 08:04:50 7089
Lakeview 07:49:51 -28.3 Dark Up 27.7 147.7 Low 07:34:51 - 08:04:51 7058
Chiloquin 07:49:55 -27.8 Dark Up 26.7 146.3 Low 07:34:55 - 08:04:55 7048
Klamath Falls 07:49:55 -28.2 Dark Up 27.0 146.3 Low 07:34:55 - 08:04:55 7026
Cedarville 07:49:51 -28.9 Dark Up 28.3 147.7 Low 07:34:51 - 08:04:51 7016
Tulelake 07:49:54 -28.5 Dark Up 27.4 146.5 Low 07:34:54 - 08:04:54 7014
Fall River/Burney 07:49:55 -29.4 Dark Up 28.2 146.4 Low 07:34:55 - 08:04:55 6951
Susanville 07:49:54 -30.0 Dark Up 29.0 146.9 Low 07:34:54 - 08:04:54 6924
Gimple 07:49:54 -30.3 Dark Up 29.2 146.6 Low 07:34:54 - 08:04:54 6899
Greenville 07:49:54 -30.3 Dark Up 29.1 146.5 Low 07:34:54 - 08:04:54 6897
Portola 07:49:53 -30.6 Dark Up 29.6 146.9 Low 07:34:53 - 08:04:53 6885
Quincy 07:49:54 -30.5 Dark Up 29.3 146.5 Low 07:34:54 - 08:04:54 6882
Reno 07:49:51 -30.9 Dark Up 30.1 147.5 Up 07:34:51 - 08:04:51 6882
Yerington 07:49:50 -31.5 Dark Up 30.8 148.0 Up 07:34:50 - 08:04:50 6858
Carson City 07:49:52 -31.3 Dark Up 30.4 147.4 Up 07:34:52 - 08:04:52 6856
Gardnerville 07:49:52 -31.5 Dark Up 30.6 147.4 Up 07:34:52 - 08:04:52 6839
Tonopah 07:49:44 -32.4 Dark Up 32.4 149.6 Up 07:34:44 - 08:04:44 6838
Hawthorne 07:49:49 -32.0 Dark Up 31.4 148.3 Up 07:34:49 - 08:04:49 6837
Lee Vining 07:49:50 -32.5 Dark Up 31.7 147.7 Up 07:34:50 - 08:04:50 6782
Indian Springs 07:49:39 -33.9 Dark Up 34.3 150.8 Up 07:34:39 - 08:04:39 6765
Beatty 07:49:43 -33.6 Dark Up 33.6 149.7 Up 07:34:43 - 08:04:43 6762
Bishop 07:49:48 -33.1 Dark Up 32.5 148.2 Up 07:34:48 - 08:04:48 6755
Henderson 07:49:36 -34.4 Dark Up 35.0 151.3 Up 07:34:36 - 08:04:36 6742
Patrick 07:49:33 -34.9 Dark Up 36.0 152.3 Up 07:34:33 - 08:04:33 6723
DCO 07:49:31 -35.2 Dark Up 36.5 153.0 Up 07:34:31 - 08:04:31 6717
Lone Pine 07:49:48 -33.9 Dark Up 33.3 148.3 Up 07:34:48 - 08:04:48 6706
Kingman/Dolan Springs 07:49:34 -35.2 Dark Up 36.1 152.0 Up 07:34:34 - 08:04:34 6701
Searchlight/Boulder City 07:49:37 -34.9 Dark Up 35.6 151.2 Up 07:34:37 - 08:04:37 6700
Laughlin/Bullhead City 07:49:36 -35.2 Dark Up 36.0 151.5 Up 07:34:36 - 08:04:36 6686
Mohave Valley 07:49:36 -35.5 Dark Up 36.2 151.4 Up 07:34:36 - 08:04:36 6665
Lake Havasu City 07:49:35 -35.9 Dark Up 36.6 151.5 Up 07:34:35 - 08:04:35 6640
Parker 07:49:35 -36.2 Dark Up 37.0 151.4 Up 07:34:35 - 08:04:35 6613
Blythe 07:49:36 -36.8 Dark Up 37.3 150.9 Up 07:34:36 - 08:04:36 6564
CPSLO 07:49:57 -35.1 Dark Up 33.3 145.2 Up 07:34:57 - 08:04:57 6536
Idyllwild 07:49:44 -36.7 Dark Up 36.3 148.7 Up 07:34:44 - 08:04:44 6517
Calipatria 07:49:40 -37.3 Dark Up 37.4 149.7 Up 07:34:40 - 08:04:40 6500
Wildwood 07:49:51 -36.4 Dark Up 35.2 146.8 Up 07:34:51 - 08:04:51 6495
Yuma 07:49:37 -37.7 Dark Up 38.1 150.5 Up 07:34:37 - 08:04:37 6489

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, (2019/05/18 07:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.47  22
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.59  28
53Nu Ser       17:20:49.7 -12:50:49  4.0  2.15  31
PPM 233132     17:29:07.3 -14:04:50  8.2  0.25  33
PPM 233114     17:28:32.1 -14:09:01  9.4  0.13  32
04HX78         17:28:05.9 -14:04:25 15.2        32
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:57:11 UT

Marc W. Buie, Southwest Research Institute

RECON