RECON: TNO occultation with 04VK78

Event between 04VK78 and star UC4-562-011582 with event index number of 222816

Geocentric closest approach at 2019/11/24 09:31:55 UTC

J2000 position of star is 04:43:19.7 +22:23:23
Equinox of date position of star is 04:44:24.5 +22:25:20
Stellar brightness R=14.8, use SENSEUP=128
Star is 140 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=23.7

[RECON map]
TNO is 35.4 AU from the Sun and 34.4 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 526 seconds.
The 1-sigma cross-track error in the shadow position is 5480 km.
The sky-plane scale is 24967.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.2
Diameter=140.0 km assuming a 5% albedo -- 5.8 sec chord
Diameter=57.1 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 04VK78, (2019/11/24 09:32UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.9 +16:32:52  0.8  6.13 142
3Iot Aur       04:58:17.5 +33:11:45  2.7 11.19 133
PPM 093742     04:46:54.7 +23:39:47  6.1  1.35 139
PPM 093726     04:45:05.8 +22:58:49  7.0  0.57 139
PPM 093696     04:42:54.3 +22:39:34  9.5  0.44 140
PPM 093716     04:43:55.6 +22:38:30 10.6  0.26 140
04VK78         04:44:31.3 +22:25:33 14.8       139
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 1.7 sigma about the mid-time.
The median site spacing is 25.3 km RECON observability=1.0 and success probability=8.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:30:55 -54.5 Dark Down 60.7 210.4 Up 09:15:55 - 09:45:55 -396
Tonasket 09:30:55 -54.7 Dark Down 60.9 210.6 Up 09:15:55 - 09:45:55 -420
Okanogan 09:30:55 -55.0 Dark Down 61.3 210.7 Up 09:15:55 - 09:45:55 -453
Brewster 09:30:56 -55.2 Dark Down 61.6 210.6 Up 09:15:56 - 09:45:56 -481
Manson/Chelan 09:30:57 -55.6 Dark Down 61.9 210.1 Up 09:15:57 - 09:45:57 -501
Entiat 09:30:57 -55.7 Dark Down 62.1 210.2 Up 09:15:57 - 09:45:57 -523
Wenatchee 09:30:57 -56.0 Dark Down 62.4 210.2 Up 09:15:57 - 09:45:57 -549
Ellensburg 09:30:58 -56.4 Dark Down 62.8 210.2 Up 09:15:58 - 09:45:58 -591
Yakima 09:30:58 -56.6 Dark Down 63.1 210.6 Up 09:15:58 - 09:45:58 -632
Toppenish/White Swan 09:30:57 -56.7 Dark Down 63.3 211.1 Up 09:15:57 - 09:45:57 -654
Pasco 09:30:53 -56.1 Dark Down 62.9 213.6 Up 09:15:53 - 09:45:53 -669
PNWRO 09:30:52 -56.2 Dark Down 63.0 214.3 Up 09:15:52 - 09:45:52 -695
George/Umatilla 09:30:54 -56.5 Dark Down 63.3 213.6 Up 09:15:54 - 09:45:54 -703
Goldendale 09:30:58 -57.3 Dark Down 63.9 210.9 Up 09:15:58 - 09:45:58 -710
The Dalles 09:30:59 -57.6 Dark Down 64.2 210.4 Up 09:15:59 - 09:45:59 -732
Maupin 09:30:59 -57.9 Dark Down 64.5 211.1 Up 09:15:59 - 09:45:59 -776
Madras/Culver 09:30:59 -58.2 Dark Down 65.0 211.6 Up 09:15:59 - 09:45:59 -832
Sisters 09:31:00 -58.7 Dark Down 65.5 211.1 Up 09:16:00 - 09:46:00 -866
Redmond 09:30:59 -58.5 Dark Down 65.3 211.9 Up 09:15:59 - 09:45:59 -869
Bend 09:30:59 -58.7 Dark Down 65.6 211.9 Up 09:15:59 - 09:45:59 -891
Oregon Observatory 09:31:00 -58.9 Dark Down 65.8 211.8 Up 09:16:00 - 09:46:00 -909
La Pine/Gilchrist 09:31:00 -59.1 Dark Down 66.0 211.9 Up 09:16:00 - 09:46:00 -930
North Lake 09:30:58 -59.0 Dark Down 66.1 213.7 Up 09:15:58 - 09:45:58 -977
Paisley 09:30:57 -59.2 Dark Down 66.4 215.1 Up 09:15:57 - 09:45:57 -1035
Chiloquin 09:31:01 -60.0 Dark Down 67.1 212.6 Up 09:16:01 - 09:46:01 -1045
Klamath Falls 09:31:01 -60.2 Dark Down 67.3 213.2 Up 09:16:01 - 09:46:01 -1081
Lakeview 09:30:56 -59.4 Dark Down 66.7 216.2 Up 09:15:56 - 09:45:56 -1089
Tulelake 09:30:59 -60.2 Dark Down 67.4 214.2 Up 09:15:59 - 09:45:59 -1111
Cedarville 09:30:55 -59.6 Dark Down 67.2 217.5 Up 09:15:55 - 09:45:55 -1159
Fall River/Burney 09:30:59 -60.7 Dark Down 68.1 215.6 Up 09:15:59 - 09:45:59 -1207
Niwot 09:30:06 -50.2 Dark Down 59.4 243.6 Up 09:15:06 - 09:45:06 -1275
Susanville 09:30:56 -60.6 Dark Down 68.3 218.1 Up 09:15:56 - 09:45:56 -1275
Greenville 09:30:58 -60.9 Dark Down 68.6 217.9 Up 09:15:58 - 09:45:58 -1304
Gimple 09:30:57 -60.9 Dark Down 68.6 218.1 Up 09:15:57 - 09:45:57 -1304
Quincy 09:30:57 -61.0 Dark Down 68.8 218.3 Up 09:15:57 - 09:45:57 -1326
Portola 09:30:56 -60.8 Dark Down 68.7 219.5 Up 09:15:56 - 09:45:56 -1340
Reno 09:30:54 -60.5 Dark Down 68.6 221.3 Up 09:15:54 - 09:45:54 -1370
Carson City 09:30:53 -60.7 Dark Down 68.8 222.0 Up 09:15:53 - 09:45:53 -1408
Yerington 09:30:51 -60.4 Dark Down 68.6 223.6 Up 09:15:51 - 09:45:51 -1430
Gardnerville 09:30:53 -60.8 Dark Down 69.0 222.5 Up 09:15:53 - 09:45:53 -1434
Hawthorne 09:30:49 -60.3 Dark Down 68.7 225.5 Up 09:15:49 - 09:45:49 -1480
Tonopah 09:30:44 -59.5 Dark Down 68.2 229.1 Up 09:15:44 - 09:45:44 -1532
Lee Vining 09:30:51 -60.9 Dark Down 69.3 225.6 Up 09:15:51 - 09:45:51 -1540
Bishop 09:30:48 -60.7 Dark Down 69.3 228.2 Up 09:15:48 - 09:45:48 -1606
Beatty 09:30:42 -59.7 Dark Down 68.6 232.2 Up 09:15:42 - 09:45:42 -1656
Lone Pine 09:30:47 -60.8 Dark Down 69.6 230.4 Up 09:15:47 - 09:45:47 -1688
Indian Springs 09:30:38 -59.1 Dark Down 68.2 234.8 Up 09:15:38 - 09:45:38 -1691
Henderson 09:30:36 -58.8 Dark Down 68.0 237.1 Up 09:15:36 - 09:45:36 -1749
Searchlight/Boulder City 09:30:35 -58.9 Dark Down 68.3 238.4 Up 09:15:35 - 09:45:35 -1811
Patrick 09:30:32 -58.2 Dark Down 67.6 240.2 Up 09:15:32 - 09:45:32 -1815
CPSLO 09:30:56 -63.2 Dark Down 72.1 227.8 Up 09:15:56 - 09:45:56 -1824
Kingman/Dolan Springs 09:30:32 -58.4 Dark Down 67.8 240.4 Up 09:15:32 - 09:45:32 -1840
Laughlin/Bullhead City 09:30:34 -58.8 Dark Down 68.2 239.6 Up 09:15:34 - 09:45:34 -1843
DCO 09:30:29 -57.7 Dark Down 67.2 241.9 Up 09:15:29 - 09:45:29 -1847
Mohave Valley 09:30:34 -58.9 Dark Down 68.3 240.2 Up 09:15:34 - 09:45:34 -1872
Lake Havasu City 09:30:33 -58.8 Dark Down 68.3 241.5 Up 09:15:33 - 09:45:33 -1916
Parker 09:30:33 -58.9 Dark Down 68.5 242.3 Up 09:15:33 - 09:45:33 -1954
Wildwood 09:30:48 -62.2 Dark Down 71.5 235.0 Up 09:15:48 - 09:45:48 -1960
Idyllwild 09:30:41 -60.9 Dark Down 70.4 239.3 Up 09:15:41 - 09:45:41 -2000
Blythe 09:30:34 -59.3 Dark Down 68.9 243.0 Up 09:15:34 - 09:45:34 -2011
Calipatria 09:30:37 -60.2 Dark Down 69.8 242.8 Up 09:15:37 - 09:45:37 -2066
Yuma 09:30:34 -59.6 Dark Down 69.4 245.2 Up 09:15:34 - 09:45:34 -2113

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 04VK78, (2019/11/24 09:32UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  6.13 142
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.19 133
PPM 093742     04:45:42.5 +23:37:41  6.1  1.35 139
PPM 093726     04:43:54.0 +22:56:40  7.0  0.57 139
PPM 093696     04:41:42.7 +22:37:22  9.5  0.44 140
PPM 093716     04:42:44.0 +22:36:19 10.6  0.26 140
04VK78         04:43:19.7 +22:23:23 14.8       140
Positions are for J2000

Event circumstances last updated at 2018/01/09 17:48:45 UT

Marc W. Buie, Southwest Research Institute

RECON