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 12:22:51 UTC

J2000 position of star is 04:41:17.5 +22:19:46
Equinox of date position of star is 04:42:26.1 +22:21:54
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 176 seconds.
The 1-sigma cross-track error in the shadow position is 1426 km.
The sky-plane scale is 24978.5 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 12:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.1 +16:32:52  0.8  5.96  42
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  39
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        39
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 5.1 sigma about the mid-time.
The median site spacing is 21.6 km RECON observability=0.8 and success probability=18.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 12:19:46 -32.2 Dark Up 24.4 276.2 Low 12:04:46 - 12:34:46 -1172
Summerland 12:19:46 -32.5 Dark Up 24.6 276.0 Low 12:04:46 - 12:34:46 -1184
Penticton 12:19:45 -32.4 Dark Up 24.5 276.3 Low 12:04:45 - 12:34:45 -1206
Okanagan Falls 12:19:44 -32.4 Dark Up 24.5 276.3 Low 12:04:44 - 12:34:44 -1223
Oliver 12:19:43 -32.4 Dark Up 24.5 276.4 Low 12:04:43 - 12:34:43 -1236
Anarchist Mountain Observatory 12:19:43 -32.2 Dark Up 24.3 276.7 Low 12:04:43 - 12:34:43 -1246
Oroville 12:19:43 -32.3 Dark Up 24.3 276.6 Low 12:04:43 - 12:34:43 -1254
Tonasket 12:19:42 -32.3 Dark Up 24.3 276.7 Low 12:04:42 - 12:34:42 -1273
Okanogan 12:19:41 -32.4 Dark Up 24.4 276.8 Low 12:04:41 - 12:34:41 -1306
Brewster 12:19:41 -32.5 Dark Up 24.5 276.8 Low 12:04:41 - 12:34:41 -1334
Manson/Chelan 12:19:40 -32.8 Dark Up 24.7 276.6 Low 12:04:40 - 12:34:40 -1361
Entiat 12:19:40 -32.8 Dark Up 24.7 276.6 Low 12:04:40 - 12:34:40 -1382
Wenatchee 12:19:39 -32.9 Dark Up 24.8 276.7 Low 12:04:39 - 12:34:39 -1407
Ellensburg 12:19:38 -33.1 Dark Up 24.9 276.7 Low 12:04:38 - 12:34:38 -1448
Pasco 12:19:35 -32.1 Dark Up 23.8 278.0 Low 12:04:35 - 12:34:35 -1476
Yakima 12:19:37 -33.1 Dark Up 24.8 276.9 Low 12:04:37 - 12:34:37 -1484
PNWRO 12:19:34 -31.9 Dark Up 23.6 278.3 Low 12:04:34 - 12:34:34 -1491
Toppenish/White Swan 12:19:36 -33.0 Dark Up 24.7 277.1 Low 12:04:36 - 12:34:36 -1498
George/Umatilla 12:19:34 -32.2 Dark Up 23.9 278.0 Low 12:04:34 - 12:34:34 -1511
Goldendale 12:19:35 -33.3 Dark Up 24.9 277.1 Low 12:04:35 - 12:34:35 -1558
The Dalles 12:19:35 -33.5 Dark Up 25.2 276.9 Low 12:04:35 - 12:34:35 -1588
Niwot 12:19:12 -21.3 Dark Up 12.6 288.7 Really Low 12:04:12 - 12:34:12 -1596
SwRI 12:19:12 -21.4 Dark Up 12.6 288.7 Really Low 12:04:12 - 12:34:12 -1609
Maupin 12:19:34 -33.5 Dark Up 25.0 277.2 Low 12:04:34 - 12:34:34 -1622
Madras/Culver 12:19:32 -33.5 Dark Up 25.0 277.4 Low 12:04:32 - 12:34:32 -1672
Redmond 12:19:31 -33.5 Dark Up 25.0 277.5 Low 12:04:31 - 12:34:31 -1705
Sisters 12:19:32 -33.8 Dark Up 25.3 277.3 Low 12:04:32 - 12:34:32 -1714
Bend 12:19:31 -33.6 Dark Up 25.1 277.5 Low 12:04:31 - 12:34:31 -1728
Oregon Observatory 12:19:31 -33.7 Dark Up 25.1 277.5 Low 12:04:31 - 12:34:31 -1748
La Pine/Gilchrist 12:19:30 -33.8 Dark Up 25.2 277.6 Low 12:04:30 - 12:34:30 -1768
North Lake 12:19:28 -33.3 Dark Up 24.7 278.2 Low 12:04:28 - 12:34:28 -1791
Paisley 12:19:27 -33.0 Dark Up 24.3 278.6 Low 12:04:27 - 12:34:27 -1831
Lakeview 12:19:25 -32.9 Dark Up 24.1 279.0 Low 12:04:25 - 12:34:25 -1872
Chiloquin 12:19:27 -34.0 Dark Up 25.3 277.9 Low 12:04:27 - 12:34:27 -1879
Klamath Falls 12:19:27 -33.9 Dark Up 25.2 278.1 Low 12:04:27 - 12:34:27 -1908
Tulelake 12:19:25 -33.7 Dark Up 24.9 278.4 Low 12:04:25 - 12:34:25 -1925
Cedarville 12:19:24 -32.7 Dark Up 23.9 279.4 Low 12:04:24 - 12:34:24 -1927
Fall River/Burney 12:19:23 -33.6 Dark Up 24.7 278.8 Low 12:04:23 - 12:34:23 -2007
Susanville 12:19:21 -33.0 Dark Up 24.1 279.6 Low 12:04:21 - 12:34:21 -2044
Gimple 12:19:21 -33.2 Dark Up 24.2 279.6 Low 12:04:21 - 12:34:21 -2076
Greenville 12:19:21 -33.2 Dark Up 24.2 279.5 Low 12:04:21 - 12:34:21 -2078
Portola 12:19:20 -32.8 Dark Up 23.8 279.9 Low 12:04:20 - 12:34:20 -2095
Quincy 12:19:20 -33.2 Dark Up 24.2 279.6 Low 12:04:20 - 12:34:20 -2097
Reno 12:19:18 -32.3 Dark Up 23.3 280.4 Low 12:04:18 - 12:34:18 -2101
Yerington 12:19:16 -31.8 Dark Up 22.7 281.0 Low 12:04:16 - 12:34:16 -2134
Carson City 12:19:18 -32.3 Dark Up 23.2 280.6 Low 12:04:18 - 12:34:18 -2134
Gardnerville 12:19:16 -32.2 Dark Up 23.1 280.7 Low 12:04:16 - 12:34:16 -2156
Hawthorne 12:19:15 -31.3 Dark Up 22.2 281.5 Low 12:04:15 - 12:34:15 -2161
Tonopah 12:19:12 -30.2 Dark Up 21.0 282.5 Low 12:04:12 - 12:34:12 -2162
Lee Vining 12:19:14 -31.6 Dark Up 22.5 281.5 Low 12:04:14 - 12:34:14 -2229
Indian Springs 12:19:08 -28.8 Dark Up 19.5 283.8 Really Low 12:04:08 - 12:34:08 -2254
Beatty 12:19:10 -29.7 Dark Up 20.4 283.1 Low 12:04:10 - 12:34:10 -2257
Bishop 12:19:12 -31.0 Dark Up 21.8 282.1 Low 12:04:12 - 12:34:12 -2264
Henderson 12:19:06 -28.1 Dark Up 18.8 284.4 Really Low 12:04:06 - 12:34:06 -2282
Patrick 12:19:05 -27.1 Dark Up 17.8 285.1 Really Low 12:04:05 - 12:34:05 -2305
DCO 12:19:03 -26.5 Dark Up 17.2 285.6 Really Low 12:04:03 - 12:34:03 -2311
Lone Pine 12:19:10 -30.7 Dark Up 21.4 282.6 Low 12:04:10 - 12:34:10 -2326
Kingman/Dolan Springs 12:19:04 -27.3 Dark Up 17.9 285.1 Really Low 12:04:04 - 12:34:04 -2332
Searchlight/Boulder City 12:19:05 -28.0 Dark Up 18.7 284.6 Really Low 12:04:05 - 12:34:05 -2334
Laughlin/Bullhead City 12:19:04 -27.7 Dark Up 18.3 284.9 Really Low 12:04:04 - 12:34:04 -2351
Mohave Valley 12:19:03 -27.6 Dark Up 18.2 284.9 Really Low 12:04:03 - 12:34:03 -2377
Lake Havasu City 12:19:03 -27.4 Dark Up 17.9 285.2 Really Low 12:04:03 - 12:34:03 -2407
Parker 12:19:02 -27.3 Dark Up 17.8 285.3 Really Low 12:04:02 - 12:34:02 -2439
Blythe 12:19:01 -27.4 Dark Up 17.9 285.3 Really Low 12:04:01 - 12:34:01 -2499
CPSLO 12:19:09 -32.6 Dark Up 23.2 281.7 Low 12:04:09 - 12:34:09 -2530
Idyllwild 12:19:03 -29.2 Dark Up 19.7 284.3 Really Low 12:04:03 - 12:34:03 -2558
Calipatria 12:19:01 -28.1 Dark Up 18.6 285.0 Really Low 12:04:01 - 12:34:01 -2578
Wildwood 12:19:05 -30.8 Dark Up 21.3 283.2 Low 12:04:05 - 12:34:05 -2583
Yuma 12:18:59 -27.3 Dark Up 17.7 285.6 Really Low 12:03:59 - 12:33:59 -2590

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 12:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  5.96  42
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  39
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 2019/01/30 20:43:25 UT

Marc W. Buie, Southwest Research Institute

RECON