RECON: TNO occultation with 120347

Event between (120347) Salacia and star UC4-561-142104 with event index number of 170315

Geocentric closest approach at 2018/12/27 04:18:47 UTC

J2000 position of star is 23:24:24.9 +22:06:10
Equinox of date position of star is 23:25:15.8 +22:11:46
Stellar brightness R=16.0, use SENSEUP=128
Star is 144 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=20.6

[RECON map]
TNO is 44.8 AU from the Sun and 44.9 AU from the Earth.
The TNO is moving 13.5 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 369 seconds.
The 1-sigma cross-track error in the shadow position is 3854 km.
The sky-plane scale is 32554.8 km/arcsec.

The TNO has an absolute magnitude Hv=3.9
Diameter=1000.0 km assuming a 5% albedo -- 74.0 sec chord
Diameter=408.3 km assuming a 30% albedo -- 30.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 120347, (2018/12/27 04:19UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:04.8 +45:20:56  1.3 40.42 117
Scheat         23:04:41.8 +28:11:10  2.4  7.59 139
68Ups Peg      23:26:19.8 +23:30:32  4.4  1.32 142
PPM 115444     23:25:15.5 +21:31:02  7.9  0.69 144
PPM 115432     23:24:29.3 +21:54:27  9.9  0.36 144
PPM 115452     23:25:28.3 +22:19:33 10.7  0.12 144
120347         23:25:21.7 +22:12:26 16.0       144
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 2.4 sigma about the mid-time.
The median site spacing is 5.3 km RECON observability=1.0 and success probability=7.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 04:20:59 -52.4 Dark Down 33.1 272.2 Up 04:05:59 - 04:35:59 1620
Oroville 04:19:28 -40.3 Dark Down 42.5 254.1 Up 04:04:28 - 04:34:28 1248
Tonasket 04:19:30 -40.3 Dark Down 42.5 254.3 Up 04:04:30 - 04:34:30 1240
Okanogan 04:19:32 -40.3 Dark Down 42.7 254.4 Up 04:04:32 - 04:34:32 1223
Brewster 04:19:34 -40.2 Dark Down 42.9 254.5 Up 04:04:34 - 04:34:34 1205
Manson/Chelan 04:19:35 -40.0 Dark Down 43.2 254.4 Up 04:04:35 - 04:34:35 1180
PNWRO 04:19:52 -41.2 Dark Down 42.8 257.3 Up 04:04:52 - 04:34:52 1175
Pasco 04:19:50 -41.0 Dark Down 42.9 256.8 Up 04:04:50 - 04:34:50 1173
Entiat 04:19:37 -40.0 Dark Down 43.3 254.5 Up 04:04:37 - 04:34:37 1170
Wenatchee 04:19:38 -40.0 Dark Down 43.4 254.7 Up 04:04:38 - 04:34:38 1156
George/Umatilla 04:19:52 -40.9 Dark Down 43.1 256.9 Up 04:04:52 - 04:34:52 1150
Ellensburg 04:19:41 -39.9 Dark Down 43.7 254.9 Up 04:04:41 - 04:34:41 1132
Toppenish/White Swan 04:19:47 -40.1 Dark Down 43.7 255.6 Up 04:04:47 - 04:34:47 1117
Yakima 04:19:45 -39.9 Dark Down 43.8 255.2 Up 04:04:45 - 04:34:45 1116
Goldendale 04:19:49 -39.9 Dark Down 44.1 255.7 Up 04:04:49 - 04:34:49 1076
The Dalles 04:19:51 -39.7 Dark Down 44.4 255.6 Up 04:04:51 - 04:34:51 1049
Maupin 04:19:55 -39.8 Dark Down 44.5 256.1 Up 04:04:55 - 04:34:55 1039
DCO 04:21:26 -46.9 Dark Down 39.2 271.1 Up 04:06:26 - 04:36:26 1029
Madras/Culver 04:19:56 -39.8 Dark Down 44.6 256.6 Up 04:04:56 - 04:34:56 1017
Cedarville 04:19:56 -40.8 Dark Down 44.6 260.4 Up 04:04:56 - 04:34:56 1012
Portola 04:19:56 -40.6 Dark Down 45.0 261.9 Up 04:04:56 - 04:34:56 1007
Patrick 04:21:23 -46.3 Dark Down 39.8 270.5 Up 04:06:23 - 04:36:23 1005
Lakeview 04:19:56 -40.6 Dark Down 44.6 259.6 Up 04:04:56 - 04:34:56 1004
Redmond 04:19:56 -39.8 Dark Down 44.7 256.9 Up 04:04:56 - 04:34:56 1002
Paisley 04:19:56 -40.4 Dark Down 44.6 259.0 Up 04:04:56 - 04:34:56 999
North Lake 04:19:56 -40.1 Dark Down 44.8 258.1 Up 04:04:56 - 04:34:56 989
Bend 04:19:56 -39.7 Dark Down 44.9 257.0 Up 04:04:56 - 04:34:56 988
Susanville 04:19:56 -40.5 Dark Down 45.1 261.1 Up 04:04:56 - 04:34:56 987
Kingman/Dolan Springs 04:21:24 -46.2 Dark Down 40.0 270.6 Up 04:06:24 - 04:36:24 984
Sisters 04:19:56 -39.5 Dark Down 45.0 256.6 Up 04:04:56 - 04:34:56 982
Gimple 04:19:56 -40.3 Dark Down 45.3 261.2 Up 04:04:56 - 04:34:56 978
Oregon Observatory 04:19:56 -39.6 Dark Down 45.0 257.1 Up 04:04:56 - 04:34:56 976
Quincy 04:19:56 -40.2 Dark Down 45.4 261.4 Up 04:04:56 - 04:34:56 976
Henderson 04:21:16 -45.4 Dark Down 40.8 269.3 Up 04:06:16 - 04:36:16 973
Greenville 04:19:56 -40.2 Dark Down 45.4 261.2 Up 04:04:56 - 04:34:56 972
La Pine/Gilchrist 04:19:56 -39.6 Dark Down 45.1 257.2 Up 04:04:56 - 04:34:56 967
Indian Springs 04:21:11 -44.8 Dark Down 41.3 268.4 Up 04:06:11 - 04:36:11 960
Laughlin/Bullhead City 04:21:24 -45.7 Dark Down 40.4 270.3 Up 04:06:24 - 04:36:24 955
Searchlight/Boulder City 04:21:21 -45.4 Dark Down 40.7 269.8 Up 04:06:21 - 04:36:21 951
Tonopah 04:20:57 -43.4 Dark Down 42.5 266.0 Up 04:05:57 - 04:35:57 945
Mohave Valley 04:21:25 -45.8 Dark Down 40.4 270.5 Up 04:06:25 - 04:36:25 943
Fall River/Burney 04:19:56 -39.9 Dark Down 45.5 259.9 Up 04:04:56 - 04:34:56 938
Lake Havasu City 04:21:29 -46.0 Dark Down 40.2 271.0 Up 04:06:29 - 04:36:29 937
Tulelake 04:19:56 -39.8 Dark Down 45.4 258.9 Up 04:04:56 - 04:34:56 937
Parker 04:21:32 -46.0 Dark Down 40.1 271.3 Up 04:06:32 - 04:36:32 922
Chiloquin 04:19:56 -39.4 Dark Down 45.6 258.0 Up 04:04:56 - 04:34:56 922
Klamath Falls 04:19:56 -39.5 Dark Down 45.6 258.4 Up 04:04:56 - 04:34:56 922
Beatty 04:21:06 -43.9 Dark Down 42.2 267.4 Up 04:06:06 - 04:36:06 917
Hawthorne 04:20:50 -42.3 Dark Down 43.6 264.6 Up 04:05:50 - 04:35:50 890
Yerington 04:20:46 -41.8 Dark Down 44.0 263.8 Up 04:05:46 - 04:35:46 883
Blythe 04:21:35 -45.8 Dark Down 40.3 271.6 Up 04:06:35 - 04:36:35 881
Reno 04:20:38 -41.3 Dark Down 44.4 262.7 Up 04:05:38 - 04:35:38 872
Carson City 04:20:42 -41.3 Dark Down 44.5 263.1 Up 04:05:42 - 04:35:42 857
Bishop 04:21:00 -42.5 Dark Down 43.5 265.9 Up 04:06:00 - 04:36:00 850
Gardnerville 04:20:45 -41.4 Dark Down 44.4 263.4 Up 04:05:45 - 04:35:45 849
Lee Vining 04:20:53 -41.9 Dark Down 44.0 264.8 Up 04:05:53 - 04:35:53 839
Yuma 04:21:42 -45.8 Dark Down 40.3 272.4 Up 04:06:42 - 04:36:42 833
Lone Pine 04:21:06 -42.8 Dark Down 43.2 266.8 Up 04:06:06 - 04:36:06 833
Calipatria 04:21:36 -45.0 Dark Down 41.1 271.5 Up 04:06:36 - 04:36:36 805
Idyllwild 04:21:30 -44.0 Dark Down 42.1 270.3 Up 04:06:30 - 04:36:30 770
Wildwood 04:21:23 -42.4 Dark Down 43.7 268.9 Up 04:06:23 - 04:36:23 681
CPSLO 04:21:10 -40.7 Dark Down 45.4 266.5 Up 04:06:10 - 04:36:10 625

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 120347, (2018/12/27 04:19UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 40.42 117
Scheat         23:03:46.7 +28:05:00  2.4  7.59 139
68Ups Peg      23:25:23.0 +23:24:15  4.4  1.32 142
PPM 115444     23:24:18.7 +21:24:46  7.9  0.69 144
PPM 115432     23:23:32.5 +21:48:12  9.9  0.36 144
PPM 115452     23:24:31.5 +22:13:17 10.7  0.12 144
120347         23:24:24.9 +22:06:10 16.0       144
Positions are for J2000

Event circumstances last updated at 2017/01/01 19:08:04 UT

Marc W. Buie, Southwest Research Institute

RECON