RECON: TNO occultation with 04VK78

Event between 04VK78 and star GA1120:00892321 with event index number of 1079797

Geocentric closest approach at 2021/11/22 12:17:29 UTC

J2000 position of star is 04:59:43.3 +22:55:56
Equinox of date position of star is 05:00:53.7 +22:57:37
Stellar brightness G=14.1, use SENSEUP=64
Star is 18 degrees from the moon. Moon is 91% illuminated.
TNO apparent brightness V=23.6

[RECON map]
TNO is 35.9 AU from the Sun and 35.0 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 653 seconds.
The 1-sigma cross-track error in the shadow position is 4449 km.
The sky-plane scale is 25358.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.2 km assuming a 5% albedo -- 6.1 sec chord
Diameter=58.5 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 04VK78, (2021/11/22 12:17UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.8 +16:33:06  0.8  8.52  26
Alnath         05:27:40.7 +28:37:26  1.6  8.24  12
PPM 094053     05:06:57.1 +23:05:22  6.5  1.37  17
PPM 093909     04:57:55.3 +23:19:41  8.5  0.80  19
PPM 093943     05:00:54.9 +23:06:15  9.6  0.14  18
04VK78         05:01:02.6 +22:57:49 14.1        18
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 1.4 sigma about the mid-time.
The median site spacing is 21.8 km RECON observability=1.0 and success probability=4.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 12:15:00 -29.5 Dark Up 42.1 255.1 Up 12:00:00 - 12:30:00 9155
Summerland 12:15:00 -29.7 Dark Up 42.3 255.1 Up 12:00:00 - 12:30:00 9123
Penticton 12:15:00 -29.6 Dark Up 42.3 255.3 Up 12:00:00 - 12:30:00 9118
Okanagan Falls 12:15:00 -29.7 Dark Up 42.3 255.4 Up 12:00:00 - 12:30:00 9100
Oliver 12:14:59 -29.7 Dark Up 42.4 255.6 Up 11:59:59 - 12:29:59 9085
Anarchist Mountain Observatory 12:14:58 -29.5 Dark Up 42.3 255.9 Up 11:59:58 - 12:29:58 9073
Oroville 12:14:58 -29.6 Dark Up 42.4 255.9 Up 11:59:58 - 12:29:58 9064
Tonasket 12:14:58 -29.6 Dark Up 42.4 256.1 Up 11:59:58 - 12:29:58 9043
Okanogan 12:14:57 -29.7 Dark Up 42.6 256.2 Up 11:59:57 - 12:29:57 9008
Brewster 12:14:57 -29.9 Dark Up 42.8 256.3 Up 11:59:57 - 12:29:57 8979
Manson/Chelan 12:14:57 -30.1 Dark Up 43.1 256.2 Up 11:59:57 - 12:29:57 8953
Entiat 12:14:57 -30.2 Dark Up 43.2 256.3 Up 11:59:57 - 12:29:57 8930
Wenatchee 12:14:57 -30.3 Dark Up 43.3 256.5 Up 11:59:57 - 12:29:57 8904
Ellensburg 12:14:56 -30.4 Dark Up 43.6 256.6 Up 11:59:56 - 12:29:56 8861
Yakima 12:14:55 -30.5 Dark Up 43.7 257.0 Up 11:59:55 - 12:29:55 8821
Pasco 12:14:51 -29.5 Dark Up 42.8 258.5 Up 11:59:51 - 12:29:51 8815
Toppenish/White Swan 12:14:55 -30.4 Dark Up 43.6 257.3 Up 11:59:55 - 12:29:55 8804
PNWRO 12:14:50 -29.3 Dark Up 42.7 258.9 Up 11:59:50 - 12:29:50 8796
George/Umatilla 12:14:51 -29.7 Dark Up 43.0 258.7 Up 11:59:51 - 12:29:51 8779
Goldendale 12:14:55 -30.7 Dark Up 44.0 257.5 Up 11:59:55 - 12:29:55 8743
The Dalles 12:14:54 -30.9 Dark Up 44.3 257.4 Up 11:59:54 - 12:29:54 8714
Maupin 12:14:53 -30.9 Dark Up 44.3 257.9 Up 11:59:53 - 12:29:53 8675
Madras/Culver 12:14:53 -30.9 Dark Up 44.5 258.4 Up 11:59:53 - 12:29:53 8621
Redmond 12:14:52 -31.0 Dark Up 44.6 258.7 Up 11:59:52 - 12:29:52 8585
Sisters 12:14:53 -31.3 Dark Up 44.9 258.3 Up 11:59:53 - 12:29:53 8580
Bend 12:14:51 -31.1 Dark Up 44.7 258.7 Up 11:59:51 - 12:29:51 8561
Oregon Observatory 12:14:51 -31.2 Dark Up 44.8 258.8 Up 11:59:51 - 12:29:51 8542
Niwot 12:14:10 -18.9 Dark Up 33.2 273.3 Up 11:59:10 - 12:29:10 8538
SwRI 12:14:10 -19.0 Dark Up 33.2 273.3 Up 11:59:10 - 12:29:10 8526
La Pine/Gilchrist 12:14:51 -31.2 Dark Up 44.9 259.0 Up 11:59:51 - 12:29:51 8520
North Lake 12:14:49 -30.8 Dark Up 44.6 259.9 Up 11:59:49 - 12:29:49 8488
Paisley 12:14:47 -30.5 Dark Up 44.4 260.7 Up 11:59:47 - 12:29:47 8441
Chiloquin 12:14:49 -31.5 Dark Up 45.4 259.8 Up 11:59:49 - 12:29:49 8403
Lakeview 12:14:46 -30.4 Dark Up 44.4 261.3 Up 11:59:46 - 12:29:46 8394
Klamath Falls 12:14:49 -31.5 Dark Up 45.4 260.2 Up 11:59:49 - 12:29:49 8370
Tulelake 12:14:48 -31.2 Dark Up 45.2 260.7 Up 11:59:48 - 12:29:48 8349
Cedarville 12:14:44 -30.3 Dark Up 44.3 262.1 Up 11:59:44 - 12:29:44 8332
Fall River/Burney 12:14:45 -31.2 Dark Up 45.3 261.6 Up 11:59:45 - 12:29:45 8259
Susanville 12:14:42 -30.6 Dark Up 44.8 262.8 Up 11:59:42 - 12:29:42 8210
Gimple 12:14:42 -30.8 Dark Up 45.0 262.9 Up 11:59:42 - 12:29:42 8178
Greenville 12:14:43 -30.8 Dark Up 45.1 262.9 Up 11:59:43 - 12:29:43 8176
Quincy 12:14:42 -30.8 Dark Up 45.1 263.1 Up 11:59:42 - 12:29:42 8156
Portola 12:14:41 -30.5 Dark Up 44.8 263.5 Up 11:59:41 - 12:29:41 8153
Reno 12:14:39 -30.0 Dark Up 44.3 264.3 Up 11:59:39 - 12:29:39 8139
Carson City 12:14:39 -29.9 Dark Up 44.3 264.6 Up 11:59:39 - 12:29:39 8103
Yerington 12:14:37 -29.4 Dark Up 43.9 265.2 Up 11:59:37 - 12:29:37 8096
Gardnerville 12:14:37 -29.9 Dark Up 44.3 264.9 Up 11:59:37 - 12:29:37 8079
Hawthorne 12:14:34 -29.0 Dark Up 43.5 266.0 Up 11:59:34 - 12:29:34 8060
Tonopah 12:14:30 -27.9 Dark Up 42.4 267.4 Up 11:59:30 - 12:29:30 8043
Lee Vining 12:14:35 -29.3 Dark Up 43.9 266.3 Up 11:59:35 - 12:29:35 7992
Bishop 12:14:31 -28.7 Dark Up 43.4 267.3 Up 11:59:31 - 12:29:31 7947
Beatty 12:14:27 -27.4 Dark Up 42.1 268.7 Up 11:59:27 - 12:29:27 7936
Indian Springs 12:14:24 -26.5 Dark Up 41.3 269.7 Up 11:59:24 - 12:29:24 7927
Henderson 12:14:20 -25.9 Dark Up 40.7 270.5 Up 11:59:20 - 12:29:20 7889
Lone Pine 12:14:29 -28.4 Dark Up 43.2 268.2 Up 11:59:29 - 12:29:29 7876
Patrick 12:14:17 -24.9 Dark Up 39.8 271.7 Up 11:59:17 - 12:29:17 7851
DCO 12:14:15 -24.3 Dark Up 39.2 272.3 Up 11:59:15 - 12:29:15 7838
Searchlight/Boulder City 12:14:20 -25.8 Dark Up 40.7 271.1 Up 11:59:20 - 12:29:20 7831
Kingman/Dolan Springs 12:14:17 -25.1 Dark Up 40.0 271.8 Up 11:59:17 - 12:29:17 7824
Laughlin/Bullhead City 12:14:18 -25.5 Dark Up 40.4 271.5 Up 11:59:18 - 12:29:18 7809
Mohave Valley 12:14:19 -25.4 Dark Up 40.4 271.8 Up 11:59:19 - 12:29:19 7781
Lake Havasu City 12:14:16 -25.2 Dark Up 40.2 272.2 Up 11:59:16 - 12:29:16 7746
Parker 12:14:16 -25.1 Dark Up 40.1 272.5 Up 11:59:16 - 12:29:16 7711
CPSLO 12:14:34 -30.4 Dark Up 45.3 267.9 Up 11:59:34 - 12:29:34 7686
Blythe 12:14:15 -25.3 Dark Up 40.3 272.8 Up 11:59:15 - 12:29:15 7650
Idyllwild 12:14:21 -27.0 Dark Up 42.1 271.6 Up 11:59:21 - 12:29:21 7611
Wildwood 12:14:27 -28.6 Dark Up 43.6 270.3 Up 11:59:27 - 12:29:27 7605
Calipatria 12:14:17 -26.0 Dark Up 41.1 272.8 Up 11:59:17 - 12:29:17 7576
Yuma 12:14:14 -25.2 Dark Up 40.3 273.6 Up 11:59:14 - 12:29:14 7553

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, (2021/11/22 12:17UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  8.52  26
Alnath         05:26:17.5 +28:36:23  1.6  8.24  12
PPM 094053     05:05:37.7 +23:03:40  6.5  1.37  17
PPM 093909     04:56:35.8 +23:17:43  8.5  0.80  19
PPM 093943     04:59:35.5 +23:04:22  9.6  0.14  18
04VK78         04:59:43.3 +22:55:56 14.1        18
Positions are for J2000

Event circumstances last updated at 2019/06/08 02:40:13 UT

Marc W. Buie, Southwest Research Institute

RECON