RECON: TNO occultation with 04VK78

Event between 04VK78 and star GA1120:00743071 with event index number of 231759

Geocentric closest approach at 2019/12/14 11:35:52 UTC

J2000 position of star is 04:41:17.5 +22:19:46
Equinox of date position of star is 04:42:23.8 +22:21:50
Stellar brightness G=16.4, use SENSEUP=128
Star is 39 degrees from the moon. Moon is 94% 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 24.3 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 417 seconds.
The 1-sigma cross-track error in the shadow position is 4534 km.
The sky-plane scale is 24978.4 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, (2019/12/14 11:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.1 +16:32:52  0.8  5.96  41
3Iot Aur       04:58:17.8 +33:11:45  2.7 11.38  35
PPM 093742     04:46:54.9 +23:39:48  6.1  1.65  38
PPM 093707     04:43:24.2 +22:58:45  7.2  0.65  38
PPM 093696     04:42:54.5 +22:39:35  9.5  0.31  39
PPM 093694     04:42:38.6 +22:14:10 11.9  0.14  39
04VK78         04:42:29.2 +22:22:00 16.4        38
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 2.2 sigma about the mid-time.
The median site spacing is 21.0 km RECON observability=1.0 and success probability=9.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 11:32:57 -39.9 Dark Up 32.1 267.5 Up 11:17:57 - 11:47:57 -232
Oroville 11:32:55 -39.9 Dark Up 32.0 267.9 Up 11:17:55 - 11:47:55 -283
Tonasket 11:32:55 -40.0 Dark Up 32.0 268.1 Up 11:17:55 - 11:47:55 -304
Okanogan 11:32:54 -40.1 Dark Up 32.2 268.2 Up 11:17:54 - 11:47:54 -337
Brewster 11:32:54 -40.3 Dark Up 32.3 268.2 Up 11:17:54 - 11:47:54 -366
Manson/Chelan 11:32:54 -40.6 Dark Up 32.6 268.0 Up 11:17:54 - 11:47:54 -393
Entiat 11:32:53 -40.7 Dark Up 32.6 268.1 Up 11:17:53 - 11:47:53 -415
Wenatchee 11:32:53 -40.8 Dark Up 32.7 268.2 Up 11:17:53 - 11:47:53 -440
Ellensburg 11:32:52 -41.0 Dark Up 32.9 268.3 Up 11:17:52 - 11:47:52 -483
Pasco 11:32:48 -40.2 Dark Up 31.9 269.8 Up 11:17:48 - 11:47:48 -520
Yakima 11:32:51 -41.1 Dark Up 32.9 268.6 Up 11:17:51 - 11:47:51 -521
Toppenish/White Swan 11:32:50 -41.0 Dark Up 32.8 268.8 Up 11:17:50 - 11:47:50 -537
PNWRO 11:32:47 -40.0 Dark Up 31.7 270.1 Up 11:17:47 - 11:47:47 -538
George/Umatilla 11:32:47 -40.4 Dark Up 32.1 269.9 Up 11:17:47 - 11:47:47 -556
Goldendale 11:32:49 -41.4 Dark Up 33.1 268.9 Up 11:17:49 - 11:47:49 -598
The Dalles 11:32:49 -41.7 Dark Up 33.3 268.8 Up 11:17:49 - 11:47:49 -627
Maupin 11:32:48 -41.7 Dark Up 33.3 269.1 Up 11:17:48 - 11:47:48 -664
Madras/Culver 11:32:47 -41.8 Dark Up 33.3 269.4 Up 11:17:47 - 11:47:47 -717
Niwot 11:32:17 -30.2 Dark Up 21.2 281.9 Low 11:17:17 - 11:47:17 -719
Redmond 11:32:46 -41.9 Dark Up 33.4 269.6 Up 11:17:46 - 11:47:46 -752
Sisters 11:32:47 -42.1 Dark Up 33.6 269.3 Up 11:17:47 - 11:47:47 -758
Bend 11:32:46 -42.0 Dark Up 33.5 269.7 Up 11:17:46 - 11:47:46 -775
Oregon Observatory 11:32:46 -42.1 Dark Up 33.6 269.7 Up 11:17:46 - 11:47:46 -795
La Pine/Gilchrist 11:32:45 -42.2 Dark Up 33.6 269.8 Up 11:17:45 - 11:47:45 -816
North Lake 11:32:43 -41.8 Dark Up 33.2 270.5 Up 11:17:43 - 11:47:43 -843
Paisley 11:32:42 -41.6 Dark Up 32.9 271.1 Up 11:17:42 - 11:47:42 -888
Chiloquin 11:32:43 -42.6 Dark Up 33.9 270.3 Up 11:17:43 - 11:47:43 -930
Lakeview 11:32:40 -41.5 Dark Up 32.8 271.5 Up 11:17:40 - 11:47:40 -932
Klamath Falls 11:32:42 -42.6 Dark Up 33.8 270.6 Up 11:17:42 - 11:47:42 -962
Tulelake 11:32:41 -42.4 Dark Up 33.6 270.9 Up 11:17:41 - 11:47:41 -981
Cedarville 11:32:38 -41.5 Dark Up 32.6 272.1 Up 11:17:38 - 11:47:38 -991
Fall River/Burney 11:32:39 -42.4 Dark Up 33.5 271.6 Up 11:17:39 - 11:47:39 -1067
Susanville 11:32:36 -41.9 Dark Up 32.9 272.5 Up 11:17:36 - 11:47:36 -1111
Gimple 11:32:36 -42.1 Dark Up 33.1 272.5 Up 11:17:36 - 11:47:36 -1143
Greenville 11:32:36 -42.2 Dark Up 33.1 272.5 Up 11:17:36 - 11:47:36 -1145
Quincy 11:32:36 -42.2 Dark Up 33.1 272.6 Up 11:17:36 - 11:47:36 -1165
Portola 11:32:35 -41.8 Dark Up 32.8 273.0 Up 11:17:35 - 11:47:35 -1165
Reno 11:32:33 -41.3 Dark Up 32.3 273.5 Up 11:17:33 - 11:47:33 -1175
Carson City 11:32:33 -41.3 Dark Up 32.2 273.8 Up 11:17:33 - 11:47:33 -1210
Yerington 11:32:31 -40.8 Dark Up 31.7 274.3 Up 11:17:31 - 11:47:31 -1213
Gardnerville 11:32:32 -41.3 Dark Up 32.2 273.9 Up 11:17:32 - 11:47:32 -1233
Hawthorne 11:32:29 -40.5 Dark Up 31.3 274.9 Up 11:17:29 - 11:47:29 -1245
Tonopah 11:32:26 -39.4 Dark Up 30.1 275.9 Up 11:17:26 - 11:47:26 -1254
Lee Vining 11:32:29 -40.8 Dark Up 31.6 274.9 Up 11:17:29 - 11:47:29 -1313
Bishop 11:32:27 -40.3 Dark Up 31.0 275.7 Up 11:17:27 - 11:47:27 -1354
Beatty 11:32:23 -39.0 Dark Up 29.7 276.8 Low 11:17:23 - 11:47:23 -1356
Indian Springs 11:32:21 -38.1 Dark Up 28.8 277.6 Low 11:17:21 - 11:47:21 -1359
Henderson 11:32:19 -37.5 Dark Up 28.1 278.3 Low 11:17:19 - 11:47:19 -1392
Lone Pine 11:32:25 -40.0 Dark Up 30.7 276.3 Up 11:17:25 - 11:47:25 -1420
Patrick 11:32:16 -36.6 Dark Up 27.2 279.2 Low 11:17:16 - 11:47:16 -1422
DCO 11:32:15 -36.0 Dark Up 26.5 279.7 Low 11:17:15 - 11:47:15 -1432
Searchlight/Boulder City 11:32:18 -37.5 Dark Up 28.0 278.6 Low 11:17:18 - 11:47:18 -1447
Kingman/Dolan Springs 11:32:16 -36.7 Dark Up 27.3 279.2 Low 11:17:16 - 11:47:16 -1450
Laughlin/Bullhead City 11:32:16 -37.2 Dark Up 27.7 278.9 Low 11:17:16 - 11:47:16 -1467
Mohave Valley 11:32:16 -37.1 Dark Up 27.6 279.1 Low 11:17:16 - 11:47:16 -1493
Lake Havasu City 11:32:15 -36.9 Dark Up 27.4 279.4 Low 11:17:15 - 11:47:15 -1526
Parker 11:32:15 -36.8 Dark Up 27.3 279.6 Low 11:17:15 - 11:47:15 -1560
CPSLO 11:32:26 -42.1 Dark Up 32.6 275.7 Up 11:17:26 - 11:47:26 -1619
Blythe 11:32:14 -37.1 Dark Up 27.5 279.7 Low 11:17:14 - 11:47:14 -1621
Idyllwild 11:32:17 -38.8 Dark Up 29.2 278.6 Low 11:17:17 - 11:47:17 -1670
Wildwood 11:32:21 -40.4 Dark Up 30.8 277.5 Up 11:17:21 - 11:47:21 -1686
Calipatria 11:32:14 -37.8 Dark Up 28.1 279.5 Low 11:17:14 - 11:47:14 -1698
Yuma 11:32:12 -37.0 Dark Up 27.3 280.2 Low 11:17:12 - 11:47:12 -1715

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, (2019/12/14 11:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  5.96  41
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.38  35
PPM 093742     04:45:42.5 +23:37:41  6.1  1.65  38
PPM 093707     04:42:12.2 +22:56:33  7.2  0.65  38
PPM 093696     04:41:42.7 +22:37:22  9.5  0.31  39
PPM 093694     04:41:27.0 +22:11:57 11.9  0.14  39
04VK78         04:41:17.5 +22:19:46 16.4        39
Positions are for J2000

Event circumstances last updated at 2018/06/05 18:22:08 UT

Marc W. Buie, Southwest Research Institute

RECON