RECON: TNO occultation with 04HN79

Event between 04HN79 and star UC4-347-071136 with event index number of 107932

Geocentric closest approach at 2017/04/22 06:14:50 UTC

J2000 position of star is 15:02:27.0 -20:38:38
Equinox of date position of star is 15:03:26.5 -20:42:40
Stellar brightness R=14.9, use SENSEUP=128
Star is 107 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 35.8 AU from the Sun and 34.8 AU from the Earth.
The TNO is moving 22.9 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 225 seconds.
The 1-sigma cross-track error in the shadow position is 4886 km.
The sky-plane scale is 25248.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 04HN79, (2017/04/22 06:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:28.3 -26:28:08  0.9 20.72  86
27Bet Lib      15:17:56.4 -09:26:45  2.6 11.79 106
PPM 229408     14:52:49.8 -18:25:32  6.2  3.39 110
PPM 263825     15:08:17.0 -20:17:19  8.4  1.21 106
PPM 263685     15:02:41.8 -20:48:31  9.6  0.20 107
04HN79         15:03:26.5 -20:42:40 14.9       106
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 4.0 sigma about the mid-time.
The median site spacing is 12.1 km RECON observability=0.4 and success probability=4.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:17:37 -25.0 Dark Down 11.8 142.0 Really Low 06:02:37 - 06:32:37 2561
Tonasket 06:17:37 -25.2 Dark Down 12.0 141.9 Really Low 06:02:37 - 06:32:37 2548
Okanogan 06:17:38 -25.5 Dark Down 12.2 141.8 Really Low 06:02:38 - 06:32:38 2525
Brewster 06:17:39 -25.7 Dark Down 12.3 141.6 Really Low 06:02:39 - 06:32:39 2504
Manson/Chelan 06:17:40 -25.7 Dark Down 12.3 141.2 Really Low 06:02:40 - 06:32:40 2481
Entiat 06:17:41 -25.9 Dark Down 12.5 141.1 Really Low 06:02:41 - 06:32:41 2466
Niwot 06:17:10 -36.7 Dark Down 24.6 153.2 Low 06:02:10 - 06:32:10 2451
Wenatchee 06:17:41 -26.1 Dark Down 12.6 141.0 Really Low 06:02:41 - 06:32:41 2449
Ellensburg 06:17:43 -26.4 Dark Down 12.8 140.8 Really Low 06:02:43 - 06:32:43 2418
Pasco 06:17:41 -27.5 Dark Down 14.0 141.9 Really Low 06:02:41 - 06:32:41 2415
PNWRO 06:17:41 -27.8 Dark Down 14.3 142.0 Really Low 06:02:41 - 06:32:41 2407
Yakima 06:17:44 -26.8 Dark Down 13.1 140.7 Really Low 06:02:44 - 06:32:44 2393
George/Umatilla 06:17:42 -27.8 Dark Down 14.2 141.6 Really Low 06:02:42 - 06:32:42 2389
Toppenish/White Swan 06:17:44 -27.0 Dark Down 13.4 140.8 Really Low 06:02:44 - 06:32:44 2385
Goldendale 06:17:45 -27.4 Dark Down 13.6 140.4 Really Low 06:02:45 - 06:32:45 2339
The Dalles 06:17:47 -27.4 Dark Down 13.6 140.0 Really Low 06:02:47 - 06:32:47 2314
Maupin 06:17:47 -27.8 Dark Down 14.0 140.0 Really Low 06:02:47 - 06:32:47 2292
Madras/Culver 06:17:49 -28.3 Dark Down 14.4 139.9 Really Low 06:02:49 - 06:32:49 2257
Redmond 06:17:49 -28.6 Dark Down 14.7 139.8 Really Low 06:02:49 - 06:32:49 2233
Sisters 06:17:50 -28.4 Dark Down 14.5 139.5 Really Low 06:02:50 - 06:32:50 2222
Bend 06:17:50 -28.7 Dark Down 14.8 139.7 Really Low 06:02:50 - 06:32:50 2215
Oregon Observatory 06:17:50 -28.8 Dark Down 14.8 139.5 Really Low 06:02:50 - 06:32:50 2200
La Pine/Gilchrist 06:17:50 -29.0 Dark Down 15.0 139.4 Really Low 06:02:50 - 06:32:50 2185
North Lake 06:17:50 -29.6 Dark Down 15.6 139.9 Really Low 06:02:50 - 06:32:50 2176
Paisley 06:17:49 -30.2 Dark Down 16.2 140.1 Really Low 06:02:49 - 06:32:49 2151
Lakeview 06:17:50 -30.7 Dark Down 16.7 140.1 Really Low 06:02:50 - 06:32:50 2124
Chiloquin 06:17:53 -29.8 Dark Down 15.6 139.0 Really Low 06:02:53 - 06:32:53 2101
Cedarville 06:17:51 -31.3 Dark Down 17.2 140.2 Really Low 06:02:51 - 06:32:51 2086
Klamath Falls 06:17:54 -30.1 Dark Down 15.9 139.0 Really Low 06:02:54 - 06:32:54 2081
Tulelake 06:17:53 -30.5 Dark Down 16.3 139.2 Really Low 06:02:53 - 06:32:53 2073
Fall River/Burney 06:17:54 -31.3 Dark Down 17.0 139.1 Really Low 06:02:54 - 06:32:54 2014
Susanville 06:17:54 -32.1 Dark Down 17.9 139.5 Really Low 06:02:54 - 06:32:54 1995
Gimple 06:17:54 -32.3 Dark Down 18.0 139.3 Really Low 06:02:54 - 06:32:54 1969
Greenville 06:17:55 -32.3 Dark Down 17.9 139.2 Really Low 06:02:55 - 06:32:55 1966
Reno 06:17:52 -33.2 Dark Down 18.9 140.1 Really Low 06:02:52 - 06:32:52 1963
Portola 06:17:54 -32.7 Dark Down 18.4 139.6 Really Low 06:02:54 - 06:32:54 1960
Quincy 06:17:55 -32.4 Dark Down 18.1 139.2 Really Low 06:02:55 - 06:32:55 1952
Yerington 06:17:52 -33.9 Dark Down 19.7 140.5 Really Low 06:02:52 - 06:32:52 1946
Tonopah 06:17:48 -35.5 Dark Down 21.4 141.9 Low 06:02:48 - 06:32:48 1945
Carson City 06:17:53 -33.5 Dark Down 19.2 140.0 Really Low 06:02:53 - 06:32:53 1938
Hawthorne 06:17:51 -34.5 Dark Down 20.3 140.8 Low 06:02:51 - 06:32:51 1931
Gardnerville 06:17:53 -33.8 Dark Down 19.4 140.0 Really Low 06:02:53 - 06:32:53 1923
Indian Springs 06:17:45 -37.3 Dark Down 23.3 142.9 Low 06:02:45 - 06:32:45 1890
Beatty 06:17:48 -36.7 Dark Down 22.5 142.0 Low 06:02:48 - 06:32:48 1877
Lee Vining 06:17:52 -34.9 Dark Down 20.5 140.3 Low 06:02:52 - 06:32:52 1875
Henderson 06:17:44 -38.1 Dark Down 24.0 143.3 Low 06:02:44 - 06:32:44 1875
DCO 06:17:39 -39.5 Dark Down 25.7 144.7 Low 06:02:39 - 06:32:39 1868
Patrick 06:17:41 -39.0 Dark Down 25.1 144.1 Low 06:02:41 - 06:32:41 1867
Bishop 06:17:52 -35.7 Dark Down 21.3 140.7 Low 06:02:52 - 06:32:52 1856
Kingman/Dolan Springs 06:17:42 -39.2 Dark Down 25.2 143.9 Low 06:02:42 - 06:32:42 1845
Searchlight/Boulder City 06:17:45 -38.6 Dark Down 24.5 143.2 Low 06:02:45 - 06:32:45 1836
Laughlin/Bullhead City 06:17:44 -39.0 Dark Down 24.9 143.4 Low 06:02:44 - 06:32:44 1825
Lone Pine 06:17:52 -36.5 Dark Down 22.1 140.8 Low 06:02:52 - 06:32:52 1813
Mohave Valley 06:17:44 -39.2 Dark Down 25.2 143.4 Low 06:02:44 - 06:32:44 1805
Lake Havasu City 06:17:44 -39.7 Dark Down 25.6 143.5 Low 06:02:44 - 06:32:44 1785
Parker 06:17:44 -40.0 Dark Down 25.9 143.4 Low 06:02:44 - 06:32:44 1760
Blythe 06:17:45 -40.4 Dark Down 26.2 143.0 Low 06:02:45 - 06:32:45 1711
Idyllwild 06:17:51 -39.5 Dark Down 25.0 141.2 Low 06:02:51 - 06:32:51 1648
Calipatria 06:17:48 -40.5 Dark Down 26.1 142.0 Low 06:02:48 - 06:32:48 1642
Yuma 06:17:46 -41.2 Dark Down 26.9 142.7 Low 06:02:46 - 06:32:46 1640
CPSLO 06:18:00 -36.5 Dark Down 21.7 138.4 Low 06:03:00 - 06:33:00 1628
Wildwood 06:17:56 -38.4 Dark Down 23.7 139.7 Low 06:02:56 - 06:32:56 1609

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 04HN79, (2017/04/22 06:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 20.72  86
27Bet Lib      15:17:00.3 -09:22:59  2.6 11.79 106
PPM 229408     14:51:51.3 -18:21:19  6.2  3.39 110
PPM 263825     15:07:17.5 -20:13:22  8.4  1.21 106
PPM 263685     15:01:42.3 -20:44:29  9.6  0.20 107
04HN79         15:02:27.0 -20:38:38 14.9       107
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:03:02 UT

Marc W. Buie, Southwest Research Institute

RECON