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 12:04:47 UTC

J2000 position of star is 16:46:01.4 -22:26:32
Equinox of date position of star is 16:47:03.9 -22:28:22
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 -20:26:46  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 12:04:02 -8.2 CT Up 16.4 199.5 Really Low 11:49:02 - 12:19:02 2314
Tonasket 12:04:02 -8.3 CT Up 16.6 199.6 Really Low 11:49:02 - 12:19:02 2306
Okanogan 12:04:02 -8.6 CT Up 16.9 199.5 Really Low 11:49:02 - 12:19:02 2295
Brewster 12:04:02 -8.8 CT Up 17.2 199.3 Really Low 11:49:02 - 12:19:02 2285
Manson/Chelan 12:04:03 -9.1 CT Up 17.5 199.0 Really Low 11:49:03 - 12:19:03 2279
Entiat 12:04:03 -9.3 CT Up 17.7 198.9 Really Low 11:49:03 - 12:19:03 2271
Wenatchee 12:04:03 -9.5 CT Up 18.0 198.9 Really Low 11:49:03 - 12:19:03 2262
Ellensburg 12:04:03 -9.8 CT Up 18.4 198.7 Really Low 11:49:03 - 12:19:03 2247
Yakima 12:04:02 -10.0 CT Up 18.8 198.7 Really Low 11:49:02 - 12:19:02 2231
Toppenish/White Swan 12:04:01 -10.0 CT Up 19.0 198.9 Really Low 11:49:01 - 12:19:01 2223
Pasco 12:03:56 -9.3 CT Up 18.8 200.1 Really Low 11:48:56 - 12:18:56 2216
PNWRO 12:03:54 -9.3 CT Up 19.0 200.3 Really Low 11:48:54 - 12:18:54 2206
George/Umatilla 12:03:56 -9.6 CT Up 19.2 199.9 Really Low 11:48:56 - 12:18:56 2203
Goldendale 12:04:02 -10.6 CT Up 19.6 198.6 Really Low 11:49:02 - 12:19:02 2202
The Dalles 12:04:03 -10.9 CT Up 19.9 198.3 Really Low 11:49:03 - 12:19:03 2193
Maupin 12:04:02 -11.1 CT Up 20.3 198.4 Low 11:49:02 - 12:19:02 2176
Madras/Culver 12:04:01 -11.4 CT Up 20.8 198.4 Low 11:49:01 - 12:19:01 2154
Sisters 12:04:03 -11.8 CT Up 21.2 198.0 Low 11:49:03 - 12:19:03 2141
Redmond 12:04:01 -11.6 CT Up 21.1 198.4 Low 11:49:01 - 12:19:01 2139
Bend 12:04:01 -11.8 CT Up 21.4 198.3 Low 11:49:01 - 12:19:01 2131
Oregon Observatory 12:04:01 -11.9 CT Up 21.6 198.2 Low 11:49:01 - 12:19:01 2124
La Pine/Gilchrist 12:04:01 -12.1 AT Up 21.8 198.2 Low 11:49:01 - 12:19:01 2115
North Lake 12:03:58 -11.9 CT Up 22.1 198.8 Low 11:48:58 - 12:18:58 2095
Paisley 12:03:55 -12.0 CT Up 22.5 199.2 Low 11:48:55 - 12:18:55 2070
Chiloquin 12:04:01 -12.9 AT Up 22.9 198.0 Low 11:49:01 - 12:19:01 2066
Klamath Falls 12:04:00 -13.0 AT Up 23.2 198.1 Low 11:49:00 - 12:19:00 2050
Lakeview 12:03:53 -12.1 AT Up 22.9 199.5 Low 11:48:53 - 12:18:53 2047
Tulelake 12:03:58 -12.9 AT Up 23.4 198.4 Low 11:48:58 - 12:18:58 2037
Cedarville 12:03:51 -12.3 AT Up 23.5 199.7 Low 11:48:51 - 12:18:51 2016
Fall River/Burney 12:03:57 -13.3 AT Up 24.3 198.6 Low 11:48:57 - 12:18:57 1994
Susanville 12:03:52 -13.2 AT Up 24.7 199.4 Low 11:48:52 - 12:18:52 1963
Greenville 12:03:53 -13.5 AT Up 25.0 199.2 Low 11:48:53 - 12:18:53 1950
Gimple 12:03:52 -13.4 AT Up 25.0 199.2 Low 11:48:52 - 12:18:52 1949
Quincy 12:03:53 -13.6 AT Up 25.2 199.2 Low 11:48:53 - 12:18:53 1939
Portola 12:03:50 -13.3 AT Up 25.2 199.7 Low 11:48:50 - 12:18:50 1933
Reno 12:03:47 -13.0 AT Up 25.3 200.3 Low 11:48:47 - 12:18:47 1918
Carson City 12:03:47 -13.2 AT Up 25.6 200.4 Low 11:48:47 - 12:18:47 1900
Yerington 12:03:43 -12.8 AT Up 25.6 201.1 Low 11:48:43 - 12:18:43 1889
Gardnerville 12:03:46 -13.3 AT Up 25.8 200.5 Low 11:48:46 - 12:18:46 1887
Hawthorne 12:03:40 -12.7 AT Up 25.9 201.7 Low 11:48:40 - 12:18:40 1863
Niwot 12:02:43 -2.7 CT Up 19.8 213.6 Really Low 11:47:43 - 12:17:43 1861
Lee Vining 12:03:41 -13.3 AT Up 26.6 201.3 Low 11:48:41 - 12:18:41 1835
Tonopah 12:03:32 -11.9 CT Up 25.9 203.1 Low 11:48:32 - 12:18:32 1835
Bishop 12:03:36 -13.1 AT Up 26.9 202.1 Low 11:48:36 - 12:18:36 1801
Beatty 12:03:28 -12.1 AT Up 26.9 203.7 Low 11:48:28 - 12:18:28 1770
Lone Pine 12:03:33 -13.2 AT Up 27.5 202.5 Low 11:48:33 - 12:18:33 1758
Indian Springs 12:03:22 -11.5 CT Up 26.8 204.8 Low 11:48:22 - 12:18:22 1748
Henderson 12:03:17 -11.2 CT Up 27.1 205.6 Low 11:48:17 - 12:18:17 1714
CPSLO 12:03:44 -15.6 AT Up 29.5 200.3 Low 11:48:44 - 12:18:44 1689
Searchlight/Boulder City 12:03:16 -11.4 CT Up 27.6 205.8 Low 11:48:16 - 12:18:16 1681
Patrick 12:03:10 -10.7 CT Up 27.2 206.8 Low 11:48:10 - 12:18:10 1673
Laughlin/Bullhead City 12:03:14 -11.3 CT Up 27.7 206.2 Low 11:48:14 - 12:18:14 1662
Kingman/Dolan Springs 12:03:11 -10.9 CT Up 27.5 206.7 Low 11:48:11 - 12:18:11 1661
DCO 12:03:06 -10.3 CT Up 27.2 207.5 Low 11:48:06 - 12:18:06 1651
Mohave Valley 12:03:13 -11.4 CT Up 28.0 206.2 Low 11:48:13 - 12:18:13 1646
Lake Havasu City 12:03:11 -11.4 CT Up 28.2 206.6 Low 11:48:11 - 12:18:11 1621
Wildwood 12:03:32 -14.7 AT Up 30.0 202.5 Up 11:48:32 - 12:18:32 1614
Parker 12:03:10 -11.5 CT Up 28.5 206.7 Low 11:48:10 - 12:18:10 1600
Idyllwild 12:03:21 -13.5 AT Up 29.7 204.5 Low 11:48:21 - 12:18:21 1587
Blythe 12:03:10 -11.9 CT Up 29.1 206.5 Low 11:48:10 - 12:18:10 1570
Calipatria 12:03:15 -12.8 AT Up 29.9 205.7 Low 11:48:15 - 12:18:15 1544
Yuma 12:03:09 -12.3 AT Up 30.0 206.7 Low 11:48:09 - 12:18:09 1513

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 2017/05/21 16:37:46 UT

Marc W. Buie, Southwest Research Institute

RECON