RECON: TNO occultation with 04VK78

Event between 04VK78 and star GA1120:00757551 with event index number of 222816

Geocentric closest approach at 2019/11/24 09:32:53 UTC

J2000 position of star is 04:43:19.7 +22:23:23
Equinox of date position of star is 04:44:26.0 +22:25:23
Stellar brightness G=14.7, use SENSEUP=128
Star is 140 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=23.6

[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 5485 km.
The sky-plane scale is 24967.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.2 km assuming a 5% albedo -- 5.9 sec chord
Diameter=58.5 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 04VK78, (2019/11/24 09:33UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.9 +16:32:52  0.8  6.13 143
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 14.7       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 25.6 km RECON observability=1.0 and success probability=9.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 09:31:53 -54.0 Dark Down 60.2 210.1 Up 09:16:53 - 09:46:53 -188
Oroville 09:31:52 -54.4 Dark Down 60.7 210.8 Up 09:16:52 - 09:46:52 -248
Tonasket 09:31:52 -54.5 Dark Down 60.9 211.1 Up 09:16:52 - 09:46:52 -271
Okanogan 09:31:53 -54.8 Dark Down 61.2 211.1 Up 09:16:53 - 09:46:53 -305
Brewster 09:31:53 -55.1 Dark Down 61.5 211.0 Up 09:16:53 - 09:46:53 -332
Manson/Chelan 09:31:54 -55.4 Dark Down 61.8 210.5 Up 09:16:54 - 09:46:54 -353
Entiat 09:31:54 -55.6 Dark Down 62.0 210.6 Up 09:16:54 - 09:46:54 -375
Wenatchee 09:31:55 -55.9 Dark Down 62.3 210.7 Up 09:16:55 - 09:46:55 -400
Ellensburg 09:31:55 -56.2 Dark Down 62.7 210.7 Up 09:16:55 - 09:46:55 -442
Yakima 09:31:55 -56.5 Dark Down 63.1 211.1 Up 09:16:55 - 09:46:55 -484
Toppenish/White Swan 09:31:54 -56.6 Dark Down 63.2 211.6 Up 09:16:54 - 09:46:54 -506
Pasco 09:31:51 -56.0 Dark Down 62.8 214.1 Up 09:16:51 - 09:46:51 -520
PNWRO 09:31:50 -56.0 Dark Down 62.9 214.8 Up 09:16:50 - 09:46:50 -546
George/Umatilla 09:31:51 -56.3 Dark Down 63.2 214.0 Up 09:16:51 - 09:46:51 -554
Goldendale 09:31:56 -57.2 Dark Down 63.8 211.4 Up 09:16:56 - 09:46:56 -562
The Dalles 09:31:57 -57.5 Dark Down 64.1 210.9 Up 09:16:57 - 09:46:57 -584
Maupin 09:31:56 -57.7 Dark Down 64.5 211.6 Up 09:16:56 - 09:46:56 -628
Madras/Culver 09:31:56 -58.1 Dark Down 64.9 212.1 Up 09:16:56 - 09:46:56 -684
Sisters 09:31:58 -58.6 Dark Down 65.4 211.6 Up 09:16:58 - 09:46:58 -718
Redmond 09:31:56 -58.4 Dark Down 65.3 212.4 Up 09:16:56 - 09:46:56 -721
Bend 09:31:57 -58.6 Dark Down 65.5 212.4 Up 09:16:57 - 09:46:57 -743
Oregon Observatory 09:31:57 -58.8 Dark Down 65.7 212.3 Up 09:16:57 - 09:46:57 -761
La Pine/Gilchrist 09:31:57 -58.9 Dark Down 65.9 212.4 Up 09:16:57 - 09:46:57 -782
North Lake 09:31:55 -58.9 Dark Down 66.0 214.2 Up 09:16:55 - 09:46:55 -829
Paisley 09:31:54 -59.0 Dark Down 66.3 215.6 Up 09:16:54 - 09:46:54 -887
Chiloquin 09:31:58 -59.9 Dark Down 67.0 213.1 Up 09:16:58 - 09:46:58 -897
Klamath Falls 09:31:58 -60.0 Dark Down 67.2 213.7 Up 09:16:58 - 09:46:58 -933
Lakeview 09:31:53 -59.2 Dark Down 66.6 216.7 Up 09:16:53 - 09:46:53 -941
Tulelake 09:31:57 -60.0 Dark Down 67.3 214.7 Up 09:16:57 - 09:46:57 -962
Cedarville 09:31:52 -59.5 Dark Down 67.1 218.0 Up 09:16:52 - 09:46:52 -1010
Fall River/Burney 09:31:56 -60.5 Dark Down 68.0 216.1 Up 09:16:56 - 09:46:56 -1059
Niwot 09:31:04 -50.1 Dark Down 59.2 243.9 Up 09:16:04 - 09:46:04 -1124
Susanville 09:31:54 -60.4 Dark Down 68.2 218.7 Up 09:16:54 - 09:46:54 -1127
Greenville 09:31:55 -60.8 Dark Down 68.5 218.5 Up 09:16:55 - 09:46:55 -1156
Gimple 09:31:54 -60.7 Dark Down 68.5 218.7 Up 09:16:54 - 09:46:54 -1156
Quincy 09:31:55 -60.9 Dark Down 68.7 218.8 Up 09:16:55 - 09:46:55 -1177
Portola 09:31:53 -60.7 Dark Down 68.6 220.0 Up 09:16:53 - 09:46:53 -1192
Reno 09:31:51 -60.4 Dark Down 68.4 221.8 Up 09:16:51 - 09:46:51 -1221
Carson City 09:31:51 -60.6 Dark Down 68.7 222.5 Up 09:16:51 - 09:46:51 -1260
Yerington 09:31:48 -60.2 Dark Down 68.5 224.1 Up 09:16:48 - 09:46:48 -1281
Gardnerville 09:31:50 -60.7 Dark Down 68.8 223.0 Up 09:16:50 - 09:46:50 -1286
Hawthorne 09:31:46 -60.1 Dark Down 68.5 226.0 Up 09:16:46 - 09:46:46 -1332
Tonopah 09:31:41 -59.4 Dark Down 68.0 229.6 Up 09:16:41 - 09:46:41 -1383
Lee Vining 09:31:48 -60.7 Dark Down 69.2 226.1 Up 09:16:48 - 09:46:48 -1392
Bishop 09:31:45 -60.5 Dark Down 69.2 228.7 Up 09:16:45 - 09:46:45 -1457
Beatty 09:31:40 -59.6 Dark Down 68.5 232.7 Up 09:16:40 - 09:46:40 -1508
Lone Pine 09:31:44 -60.6 Dark Down 69.5 230.9 Up 09:16:44 - 09:46:44 -1539
Indian Springs 09:31:36 -58.9 Dark Down 68.0 235.2 Up 09:16:36 - 09:46:36 -1542
Henderson 09:31:33 -58.6 Dark Down 67.8 237.5 Up 09:16:33 - 09:46:33 -1600
Searchlight/Boulder City 09:31:33 -58.7 Dark Down 68.1 238.8 Up 09:16:33 - 09:46:33 -1662
Patrick 09:31:29 -58.0 Dark Down 67.4 240.6 Up 09:16:29 - 09:46:29 -1666
CPSLO 09:31:53 -63.0 Dark Down 71.9 228.3 Up 09:16:53 - 09:46:53 -1676
Kingman/Dolan Springs 09:31:30 -58.2 Dark Down 67.6 240.7 Up 09:16:30 - 09:46:30 -1690
Laughlin/Bullhead City 09:31:31 -58.6 Dark Down 68.0 240.0 Up 09:16:31 - 09:46:31 -1693
DCO 09:31:27 -57.5 Dark Down 67.0 242.3 Up 09:16:27 - 09:46:27 -1698
Mohave Valley 09:31:31 -58.7 Dark Down 68.1 240.6 Up 09:16:31 - 09:46:31 -1723
Lake Havasu City 09:31:30 -58.6 Dark Down 68.2 241.8 Up 09:16:30 - 09:46:30 -1766
Parker 09:31:30 -58.7 Dark Down 68.3 242.7 Up 09:16:30 - 09:46:30 -1805
Wildwood 09:31:45 -62.0 Dark Down 71.3 235.5 Up 09:16:45 - 09:46:45 -1811
Idyllwild 09:31:39 -60.7 Dark Down 70.2 239.8 Up 09:16:39 - 09:46:39 -1851
Blythe 09:31:31 -59.1 Dark Down 68.8 243.4 Up 09:16:31 - 09:46:31 -1862
Calipatria 09:31:34 -60.0 Dark Down 69.7 243.1 Up 09:16:34 - 09:46:34 -1917
Yuma 09:31:31 -59.4 Dark Down 69.2 245.5 Up 09:16:31 - 09:46:31 -1963

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 09:33UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  6.13 143
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 14.7       140
Positions are for J2000

Event circumstances last updated at 2018/06/05 18:21:08 UT

Marc W. Buie, Southwest Research Institute

RECON