RECON: TNO occultation with 04HC79

Event between 04HC79 and star UC4-338-085449 with event index number of 186503

Geocentric closest approach at 2019/04/22 12:04:48 UTC

J2000 position of star is 16:46:01.4 -22:26:32
Equinox of date position of star is 16:47:05.9 -22:28:26
Stellar brightness R=15.1, use SENSEUP=128
Star is 4 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 39.6 AU from the Sun and 38.8 AU from the Earth.
The TNO is moving 16.9 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 616 seconds.
The 1-sigma cross-track error in the shadow position is 5090 km.
The sky-plane scale is 28133.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=201.4 km assuming a 5% albedo -- 11.9 sec chord
Diameter=82.2 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 04HC79, (2019/04/22 12:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.7 -26:28:24  0.9  5.50   8
23Tau Sco      16:37:05.3 -28:15:16  2.8  6.21   9
PPM 266088     16:54:33.8 -20:26:47  5.7  2.66   3
PPM 265937     16:47:38.8 -22:39:44  8.4  0.21   4
PPM 265936     16:47:36.8 -22:21:02  9.9  0.16   4
04HC79         16:47:10.8 -22:28:34 15.1         4
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 0.0 km RECON observability=0.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 12:04:04 -8.2 CT Up 16.4 199.6 Really Low 11:49:04 - 12:19:04 2314
Tonasket 12:04:03 -8.3 CT Up 16.6 199.6 Really Low 11:49:03 - 12:19:03 2306
Okanogan 12:04:03 -8.6 CT Up 16.9 199.5 Really Low 11:49:03 - 12:19:03 2295
Brewster 12:04:03 -8.8 CT Up 17.2 199.3 Really Low 11:49:03 - 12:19:03 2286
Manson/Chelan 12:04:05 -9.1 CT Up 17.5 199.0 Really Low 11:49:05 - 12:19:05 2279
Entiat 12:04:05 -9.3 CT Up 17.7 198.9 Really Low 11:49:05 - 12:19:05 2271
Wenatchee 12:04:05 -9.5 CT Up 18.0 198.9 Really Low 11:49:05 - 12:19:05 2262
Ellensburg 12:04:05 -9.8 CT Up 18.4 198.7 Really Low 11:49:05 - 12:19:05 2247
Yakima 12:04:04 -10.0 CT Up 18.8 198.7 Really Low 11:49:04 - 12:19:04 2231
Toppenish/White Swan 12:04:03 -10.0 CT Up 19.0 198.9 Really Low 11:49:03 - 12:19:03 2223
Pasco 12:03:57 -9.3 CT Up 18.8 200.1 Really Low 11:48:57 - 12:18:57 2216
PNWRO 12:03:56 -9.3 CT Up 19.0 200.4 Really Low 11:48:56 - 12:18:56 2206
George/Umatilla 12:03:58 -9.6 CT Up 19.2 199.9 Really Low 11:48:58 - 12:18:58 2204
Goldendale 12:04:04 -10.6 CT Up 19.6 198.6 Really Low 11:49:04 - 12:19:04 2202
The Dalles 12:04:05 -10.9 CT Up 19.9 198.3 Really Low 11:49:05 - 12:19:05 2193
Maupin 12:04:03 -11.0 CT Up 20.3 198.4 Low 11:49:03 - 12:19:03 2176
Madras/Culver 12:04:03 -11.3 CT Up 20.8 198.4 Low 11:49:03 - 12:19:03 2154
Sisters 12:04:04 -11.8 CT Up 21.2 198.0 Low 11:49:04 - 12:19:04 2140
Redmond 12:04:02 -11.6 CT Up 21.1 198.4 Low 11:49:02 - 12:19:02 2139
Bend 12:04:03 -11.8 CT Up 21.4 198.3 Low 11:49:03 - 12:19:03 2130
Oregon Observatory 12:04:03 -11.9 CT Up 21.6 198.2 Low 11:49:03 - 12:19:03 2123
La Pine/Gilchrist 12:04:03 -12.1 AT Up 21.8 198.2 Low 11:49:03 - 12:19:03 2114
North Lake 12:03:59 -11.9 CT Up 22.1 198.8 Low 11:48:59 - 12:18:59 2094
Paisley 12:03:57 -12.0 CT Up 22.5 199.2 Low 11:48:57 - 12:18:57 2069
Chiloquin 12:04:03 -12.8 AT Up 22.9 198.0 Low 11:49:03 - 12:19:03 2065
Klamath Falls 12:04:02 -13.0 AT Up 23.2 198.1 Low 11:49:02 - 12:19:02 2049
Lakeview 12:03:55 -12.1 AT Up 22.9 199.5 Low 11:48:55 - 12:18:55 2046
Tulelake 12:04:00 -12.9 AT Up 23.4 198.4 Low 11:49:00 - 12:19:00 2036
Cedarville 12:03:53 -12.3 AT Up 23.5 199.7 Low 11:48:53 - 12:18:53 2015
Fall River/Burney 12:03:58 -13.3 AT Up 24.3 198.6 Low 11:48:58 - 12:18:58 1993
Susanville 12:03:54 -13.1 AT Up 24.7 199.4 Low 11:48:54 - 12:18:54 1962
Greenville 12:03:54 -13.5 AT Up 25.0 199.2 Low 11:48:54 - 12:18:54 1949
Gimple 12:03:54 -13.4 AT Up 25.0 199.3 Low 11:48:54 - 12:18:54 1949
Quincy 12:03:54 -13.6 AT Up 25.2 199.2 Low 11:48:54 - 12:18:54 1939
Portola 12:03:52 -13.3 AT Up 25.2 199.7 Low 11:48:52 - 12:18:52 1932
Reno 12:03:48 -13.0 AT Up 25.3 200.3 Low 11:48:48 - 12:18:48 1918
Carson City 12:03:48 -13.2 AT Up 25.6 200.4 Low 11:48:48 - 12:18:48 1899
Yerington 12:03:44 -12.8 AT Up 25.6 201.1 Low 11:48:44 - 12:18:44 1888
Gardnerville 12:03:47 -13.3 AT Up 25.8 200.5 Low 11:48:47 - 12:18:47 1887
Hawthorne 12:03:41 -12.7 AT Up 25.9 201.7 Low 11:48:41 - 12:18:41 1863
Niwot 12:02:44 -2.7 CT Up 19.8 213.6 Really Low 11:47:44 - 12:17:44 1862
Tonopah 12:03:33 -11.9 CT Up 25.9 203.1 Low 11:48:33 - 12:18:33 1834
Lee Vining 12:03:42 -13.3 AT Up 26.6 201.3 Low 11:48:42 - 12:18:42 1834
Bishop 12:03:38 -13.1 AT Up 26.9 202.1 Low 11:48:38 - 12:18:38 1800
Beatty 12:03:29 -12.1 AT Up 26.9 203.7 Low 11:48:29 - 12:18:29 1770
Lone Pine 12:03:35 -13.2 AT Up 27.5 202.6 Low 11:48:35 - 12:18:35 1758
Indian Springs 12:03:23 -11.5 CT Up 26.8 204.8 Low 11:48:23 - 12:18:23 1748
Henderson 12:03:19 -11.2 CT Up 27.1 205.6 Low 11:48:19 - 12:18:19 1715
CPSLO 12:03:46 -15.6 AT Up 29.5 200.3 Low 11:48:46 - 12:18:46 1689
Searchlight/Boulder City 12:03:18 -11.4 CT Up 27.6 205.8 Low 11:48:18 - 12:18:18 1682
Patrick 12:03:12 -10.7 CT Up 27.2 206.8 Low 11:48:12 - 12:18:12 1673
Laughlin/Bullhead City 12:03:15 -11.3 CT Up 27.7 206.2 Low 11:48:15 - 12:18:15 1663
Kingman/Dolan Springs 12:03:12 -10.9 CT Up 27.5 206.7 Low 11:48:12 - 12:18:12 1662
DCO 12:03:08 -10.3 CT Up 27.2 207.5 Low 11:48:08 - 12:18:08 1652
Mohave Valley 12:03:14 -11.4 CT Up 27.9 206.2 Low 11:48:14 - 12:18:14 1647
Lake Havasu City 12:03:12 -11.4 CT Up 28.2 206.6 Low 11:48:12 - 12:18:12 1622
Wildwood 12:03:33 -14.7 AT Up 30.0 202.5 Up 11:48:33 - 12:18:33 1614
Parker 12:03:12 -11.5 CT Up 28.5 206.7 Low 11:48:12 - 12:18:12 1601
Idyllwild 12:03:23 -13.5 AT Up 29.7 204.5 Low 11:48:23 - 12:18:23 1587
Blythe 12:03:12 -11.9 CT Up 29.1 206.5 Low 11:48:12 - 12:18:12 1571
Calipatria 12:03:16 -12.8 AT Up 29.9 205.7 Low 11:48:16 - 12:18:16 1545
Yuma 12:03:10 -12.3 AT Up 29.9 206.7 Low 11:48:10 - 12:18:10 1514

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 04HC79, (2019/04/22 12:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  5.50   8
23Tau Sco      16:35:53.0 -28:12:58  2.8  6.21   9
PPM 266088     16:53:25.2 -20:24:57  5.7  2.66   3
PPM 265937     16:46:29.2 -22:37:42  8.4  0.21   4
PPM 265936     16:46:27.3 -22:19:01  9.9  0.16   4
04HC79         16:46:01.4 -22:26:32 15.1         4
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:52:10 UT

Marc W. Buie, Southwest Research Institute

RECON