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 17:29:05.2 -14:05:12
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 7525
Tonasket 07:49:40 -21.8 Dark Up 22.4 150.1 Low 07:34:40 - 08:04:40 7512
Okanogan 07:49:41 -22.1 Dark Up 22.6 149.9 Low 07:34:41 - 08:04:41 7488
Brewster 07:49:41 -22.4 Dark Up 22.8 149.7 Low 07:34:41 - 08:04:41 7467
Manson/Chelan 07:49:43 -22.6 Dark Up 22.9 149.3 Low 07:34:43 - 08:04:43 7446
Entiat 07:49:43 -22.8 Dark Up 23.0 149.2 Low 07:34:43 - 08:04:43 7431
Wenatchee 07:49:44 -23.1 Dark Up 23.2 149.0 Low 07:34:44 - 08:04:44 7413
Ellensburg 07:49:43 -23.5 Dark Up 23.5 148.7 Low 07:34:43 - 08:04:43 7382
Pasco 07:49:41 -24.2 Dark Up 24.6 149.9 Low 07:34:41 - 08:04:41 7366
PNWRO 07:49:41 -24.5 Dark Up 24.9 150.1 Low 07:34:41 - 08:04:41 7356
Yakima 07:49:46 -23.9 Dark Up 23.8 148.6 Low 07:34:46 - 08:04:46 7355
Toppenish/White Swan 07:49:46 -24.1 Dark Up 24.1 148.7 Low 07:34:46 - 08:04:46 7345
George/Umatilla 07:49:43 -24.6 Dark Up 24.8 149.6 Low 07:34:43 - 08:04:43 7340
Goldendale 07:49:47 -24.6 Dark Up 24.4 148.2 Low 07:34:47 - 08:04:47 7300
Niwot 07:48:59 -29.2 Dark Up 34.2 163.2 Up 07:33:59 - 08:03:59 7278
The Dalles 07:49:48 -24.8 Dark Up 24.4 147.8 Low 07:34:48 - 08:04:48 7276
Maupin 07:49:48 -25.3 Dark Up 24.8 147.8 Low 07:34:48 - 08:04:48 7252
Madras/Culver 07:49:50 -25.8 Dark Up 25.3 147.6 Low 07:34:50 - 08:04:50 7214
Redmond 07:49:50 -26.2 Dark Up 25.6 147.5 Low 07:34:50 - 08:04:50 7189
Sisters 07:49:51 -26.1 Dark Up 25.4 147.1 Low 07:34:51 - 08:04:51 7182
Bend 07:49:50 -26.4 Dark Up 25.7 147.3 Low 07:34:50 - 08:04:50 7172
Oregon Observatory 07:49:51 -26.5 Dark Up 25.8 147.1 Low 07:34:51 - 08:04:51 7157
La Pine/Gilchrist 07:49:51 -26.7 Dark Up 25.9 147.0 Low 07:34:51 - 08:04:51 7141
North Lake 07:49:50 -27.2 Dark Up 26.5 147.4 Low 07:34:50 - 08:04:50 7126
Paisley 07:49:50 -27.8 Dark Up 27.1 147.7 Low 07:34:50 - 08:04:50 7097
Lakeview 07:49:50 -28.3 Dark Up 27.7 147.7 Low 07:34:50 - 08:04:50 7066
Chiloquin 07:49:54 -27.8 Dark Up 26.7 146.3 Low 07:34:54 - 08:04:54 7056
Klamath Falls 07:49:54 -28.2 Dark Up 27.0 146.3 Low 07:34:54 - 08:04:54 7034
Cedarville 07:49:50 -28.9 Dark Up 28.3 147.7 Low 07:34:50 - 08:04:50 7024
Tulelake 07:49:53 -28.5 Dark Up 27.4 146.5 Low 07:34:53 - 08:04:53 7022
Fall River/Burney 07:49:53 -29.4 Dark Up 28.2 146.3 Low 07:34:53 - 08:04:53 6959
Susanville 07:49:52 -30.0 Dark Up 29.0 146.9 Low 07:34:52 - 08:04:52 6932
Gimple 07:49:53 -30.3 Dark Up 29.2 146.6 Low 07:34:53 - 08:04:53 6906
Greenville 07:49:53 -30.3 Dark Up 29.1 146.5 Low 07:34:53 - 08:04:53 6904
Portola 07:49:52 -30.6 Dark Up 29.6 146.9 Low 07:34:52 - 08:04:52 6893
Reno 07:49:50 -30.9 Dark Up 30.1 147.5 Up 07:34:50 - 08:04:50 6890
Quincy 07:49:54 -30.5 Dark Up 29.3 146.5 Low 07:34:54 - 08:04:54 6890
Yerington 07:49:48 -31.5 Dark Up 30.8 148.0 Up 07:34:48 - 08:04:48 6865
Carson City 07:49:50 -31.3 Dark Up 30.4 147.4 Up 07:34:50 - 08:04:50 6864
Gardnerville 07:49:50 -31.5 Dark Up 30.6 147.3 Up 07:34:50 - 08:04:50 6847
Tonopah 07:49:43 -32.4 Dark Up 32.4 149.6 Up 07:34:43 - 08:04:43 6846
Hawthorne 07:49:47 -32.0 Dark Up 31.4 148.3 Up 07:34:47 - 08:04:47 6844
Lee Vining 07:49:50 -32.5 Dark Up 31.7 147.7 Up 07:34:50 - 08:04:50 6790
Indian Springs 07:49:39 -33.9 Dark Up 34.3 150.8 Up 07:34:39 - 08:04:39 6773
Beatty 07:49:42 -33.6 Dark Up 33.6 149.7 Up 07:34:42 - 08:04:42 6770
Bishop 07:49:47 -33.1 Dark Up 32.5 148.2 Up 07:34:47 - 08:04:47 6763
Henderson 07:49:36 -34.4 Dark Up 35.0 151.3 Up 07:34:36 - 08:04:36 6750
Patrick 07:49:33 -34.9 Dark Up 36.0 152.3 Up 07:34:33 - 08:04:33 6730
DCO 07:49:30 -35.2 Dark Up 36.5 153.0 Up 07:34:30 - 08:04:30 6725
Lone Pine 07:49:47 -33.9 Dark Up 33.3 148.3 Up 07:34:47 - 08:04:47 6714
Kingman/Dolan Springs 07:49:33 -35.2 Dark Up 36.1 152.0 Up 07:34:33 - 08:04:33 6708
Searchlight/Boulder City 07:49:36 -34.9 Dark Up 35.6 151.2 Up 07:34:36 - 08:04:36 6707
Laughlin/Bullhead City 07:49:35 -35.2 Dark Up 36.0 151.5 Up 07:34:35 - 08:04:35 6693
Mohave Valley 07:49:35 -35.5 Dark Up 36.2 151.4 Up 07:34:35 - 08:04:35 6672
Lake Havasu City 07:49:34 -35.9 Dark Up 36.6 151.5 Up 07:34:34 - 08:04:34 6647
Parker 07:49:34 -36.2 Dark Up 37.0 151.4 Up 07:34:34 - 08:04:34 6620
Blythe 07:49:36 -36.8 Dark Up 37.3 150.9 Up 07:34:36 - 08:04:36 6571
CPSLO 07:49:56 -35.1 Dark Up 33.3 145.2 Up 07:34:56 - 08:04:56 6543
Idyllwild 07:49:43 -36.7 Dark Up 36.3 148.7 Up 07:34:43 - 08:04:43 6525
Calipatria 07:49:40 -37.3 Dark Up 37.4 149.7 Up 07:34:40 - 08:04:40 6507
Wildwood 07:49:51 -36.4 Dark Up 35.2 146.8 Up 07:34:51 - 08:04:51 6502
Yuma 07:49:37 -37.7 Dark Up 38.1 150.5 Up 07:34:37 - 08:04:37 6496

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 2017/06/01 18:13:42 UT

Marc W. Buie, Southwest Research Institute

RECON