RECON: TNO occultation with 04VK78

Event between 04VK78 and star UC4-562-011381 with event index number of 231759

Geocentric closest approach at 2019/12/14 11:34:16 UTC

J2000 position of star is 04:41:17.6 +22:19:47
Equinox of date position of star is 04:42:22.3 +22:21:47
Stellar brightness R=15.9, use SENSEUP=128
Star is 39 degrees from the moon. Moon is 94% 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 24.3 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 414 seconds.
The 1-sigma cross-track error in the shadow position is 4712 km.
The sky-plane scale is 24978.3 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, (2019/12/14 11:34UT)
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 15.9        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 20.9 km RECON observability=1.0 and success probability=7.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:31:19 -40.2 Dark Up 32.3 267.6 Up 11:16:19 - 11:46:19 4172
Tonasket 11:31:18 -40.2 Dark Up 32.3 267.8 Up 11:16:18 - 11:46:18 4152
Okanogan 11:31:18 -40.4 Dark Up 32.4 267.9 Up 11:16:18 - 11:46:18 4118
Brewster 11:31:17 -40.6 Dark Up 32.6 267.9 Up 11:16:17 - 11:46:17 4089
Manson/Chelan 11:31:17 -40.9 Dark Up 32.8 267.7 Up 11:16:17 - 11:46:17 4062
Entiat 11:31:17 -40.9 Dark Up 32.9 267.8 Up 11:16:17 - 11:46:17 4040
Wenatchee 11:31:16 -41.1 Dark Up 33.0 267.9 Up 11:16:16 - 11:46:16 4015
Ellensburg 11:31:16 -41.3 Dark Up 33.1 268.0 Up 11:16:16 - 11:46:16 3972
Pasco 11:31:12 -40.4 Dark Up 32.2 269.5 Up 11:16:12 - 11:46:12 3935
Yakima 11:31:14 -41.4 Dark Up 33.2 268.3 Up 11:16:14 - 11:46:14 3934
Toppenish/White Swan 11:31:14 -41.3 Dark Up 33.0 268.5 Up 11:16:14 - 11:46:14 3918
PNWRO 11:31:11 -40.3 Dark Up 32.0 269.9 Up 11:16:11 - 11:46:11 3917
George/Umatilla 11:31:11 -40.6 Dark Up 32.3 269.6 Up 11:16:11 - 11:46:11 3899
Goldendale 11:31:13 -41.7 Dark Up 33.4 268.6 Up 11:16:13 - 11:46:13 3857
The Dalles 11:31:13 -42.0 Dark Up 33.6 268.5 Up 11:16:13 - 11:46:13 3828
Maupin 11:31:12 -41.9 Dark Up 33.6 268.8 Up 11:16:12 - 11:46:12 3791
Madras/Culver 11:31:10 -42.1 Dark Up 33.6 269.1 Up 11:16:10 - 11:46:10 3738
Niwot 11:30:40 -30.5 Dark Up 21.5 281.6 Low 11:15:40 - 11:45:40 3733
Redmond 11:31:10 -42.2 Dark Up 33.6 269.3 Up 11:16:10 - 11:46:10 3703
Sisters 11:31:11 -42.4 Dark Up 33.9 269.0 Up 11:16:11 - 11:46:11 3696
Bend 11:31:10 -42.3 Dark Up 33.7 269.4 Up 11:16:10 - 11:46:10 3680
Oregon Observatory 11:31:09 -42.4 Dark Up 33.8 269.4 Up 11:16:09 - 11:46:09 3660
La Pine/Gilchrist 11:31:09 -42.5 Dark Up 33.9 269.5 Up 11:16:09 - 11:46:09 3639
North Lake 11:31:07 -42.1 Dark Up 33.5 270.2 Up 11:16:07 - 11:46:07 3611
Paisley 11:31:05 -41.9 Dark Up 33.2 270.8 Up 11:16:05 - 11:46:05 3567
Chiloquin 11:31:07 -42.9 Dark Up 34.2 270.0 Up 11:16:07 - 11:46:07 3524
Lakeview 11:31:04 -41.8 Dark Up 33.1 271.3 Up 11:16:04 - 11:46:04 3523
Klamath Falls 11:31:06 -42.9 Dark Up 34.1 270.3 Up 11:16:06 - 11:46:06 3493
Tulelake 11:31:05 -42.7 Dark Up 33.9 270.7 Up 11:16:05 - 11:46:05 3474
Cedarville 11:31:02 -41.8 Dark Up 32.9 271.8 Up 11:16:02 - 11:46:02 3463
Fall River/Burney 11:31:03 -42.7 Dark Up 33.8 271.3 Up 11:16:03 - 11:46:03 3387
Susanville 11:31:00 -42.2 Dark Up 33.2 272.2 Up 11:16:00 - 11:46:00 3343
Gimple 11:31:00 -42.4 Dark Up 33.4 272.3 Up 11:16:00 - 11:46:00 3311
Greenville 11:31:00 -42.5 Dark Up 33.5 272.2 Up 11:16:00 - 11:46:00 3309
Quincy 11:31:00 -42.5 Dark Up 33.4 272.3 Up 11:16:00 - 11:46:00 3290
Portola 11:30:59 -42.1 Dark Up 33.1 272.7 Up 11:15:59 - 11:45:59 3289
Reno 11:30:57 -41.6 Dark Up 32.6 273.3 Up 11:15:57 - 11:45:57 3279
Carson City 11:30:56 -41.6 Dark Up 32.5 273.5 Up 11:15:56 - 11:45:56 3244
Yerington 11:30:55 -41.2 Dark Up 32.0 274.0 Up 11:15:55 - 11:45:55 3241
Gardnerville 11:30:56 -41.6 Dark Up 32.5 273.7 Up 11:15:56 - 11:45:56 3221
Hawthorne 11:30:53 -40.8 Dark Up 31.6 274.6 Up 11:15:53 - 11:45:53 3208
Tonopah 11:30:50 -39.7 Dark Up 30.5 275.7 Up 11:15:50 - 11:45:50 3199
Lee Vining 11:30:52 -41.2 Dark Up 31.9 274.7 Up 11:15:52 - 11:45:52 3140
Bishop 11:30:50 -40.6 Dark Up 31.3 275.5 Up 11:15:50 - 11:45:50 3100
Beatty 11:30:46 -39.3 Dark Up 30.0 276.6 Low 11:15:46 - 11:45:46 3097
Indian Springs 11:30:44 -38.4 Dark Up 29.1 277.4 Low 11:15:44 - 11:45:44 3094
Henderson 11:30:42 -37.9 Dark Up 28.5 278.0 Low 11:15:42 - 11:45:42 3061
Lone Pine 11:30:48 -40.3 Dark Up 31.0 276.1 Up 11:15:48 - 11:45:48 3033
Patrick 11:30:40 -36.9 Dark Up 27.5 279.0 Low 11:15:40 - 11:45:40 3030
DCO 11:30:38 -36.3 Dark Up 26.9 279.5 Low 11:15:38 - 11:45:38 3020
Searchlight/Boulder City 11:30:41 -37.8 Dark Up 28.3 278.4 Low 11:15:41 - 11:45:41 3006
Kingman/Dolan Springs 11:30:39 -37.1 Dark Up 27.6 279.0 Low 11:15:39 - 11:45:39 3003
Laughlin/Bullhead City 11:30:40 -37.5 Dark Up 28.0 278.7 Low 11:15:40 - 11:45:40 2986
Mohave Valley 11:30:40 -37.5 Dark Up 28.0 278.9 Low 11:15:40 - 11:45:40 2959
Lake Havasu City 11:30:38 -37.2 Dark Up 27.7 279.2 Low 11:15:38 - 11:45:38 2926
Parker 11:30:37 -37.2 Dark Up 27.6 279.4 Low 11:15:37 - 11:45:37 2892
CPSLO 11:30:50 -42.4 Dark Up 32.9 275.5 Up 11:15:50 - 11:45:50 2835
Blythe 11:30:37 -37.4 Dark Up 27.8 279.5 Low 11:15:37 - 11:45:37 2831
Idyllwild 11:30:40 -39.1 Dark Up 29.5 278.4 Low 11:15:40 - 11:45:40 2782
Wildwood 11:30:44 -40.7 Dark Up 31.1 277.3 Up 11:15:44 - 11:45:44 2767
Calipatria 11:30:38 -38.1 Dark Up 28.5 279.3 Low 11:15:38 - 11:45:38 2755
Yuma 11:30:36 -37.3 Dark Up 27.7 280.0 Low 11:15:36 - 11:45:36 2737

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 11:34UT)
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         04:41:17.6 +22:19:47 15.9        39
Positions are for J2000

Event circumstances last updated at 2018/01/09 17:49:32 UT

Marc W. Buie, Southwest Research Institute

RECON