RECON: TNO occultation with 12CS57

Event between 12CS57 and star UC4-506-050901 with event index number of 249121

Geocentric closest approach at 2020/01/07 08:15:03 UTC

J2000 position of star is 09:57:11.9 +11:11:02
Equinox of date position of star is 09:58:10.1 +11:05:49
Stellar brightness R=15.6, use SENSEUP=128
Star is 84 degrees from the moon. Moon is 86% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 43.0 AU from the Sun and 42.2 AU from the Earth.
The TNO is moving 18.4 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 1335 seconds.
The 1-sigma cross-track error in the shadow position is 4510 km.
The sky-plane scale is 30621.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=345.2 km assuming a 5% albedo -- 18.8 sec chord
Diameter=140.9 km assuming a 30% albedo -- 7.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12CS57, (2020/01/07 08:15UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.2 +11:52:07  1.3  2.85  87
27Nu Leo       09:59:17.9 +12:20:55  5.3  1.29  84
PPM 126989     09:59:43.5 +10:51:51  7.7  0.42  85
PPM 126964     09:58:40.4 +11:17:25 10.0  0.23  84
12CS57         09:58:16.1 +11:05:17 15.6        85
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 0.7 sigma about the mid-time.
The median site spacing is 23.8 km RECON observability=1.0 and success probability=3.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:18:36 -63.3 Dark Up 41.0 127.3 Up 08:03:36 - 08:33:36 10393
Tonasket 08:18:36 -63.6 Dark Up 41.1 127.2 Up 08:03:36 - 08:33:36 10370
Okanogan 08:18:38 -63.9 Dark Up 41.3 126.8 Up 08:03:38 - 08:33:38 10335
Brewster 08:18:40 -64.2 Dark Up 41.3 126.4 Up 08:03:40 - 08:33:40 10305
Manson/Chelan 08:18:39 -64.4 Dark Up 41.3 125.8 Up 08:03:39 - 08:33:39 10279
Entiat 08:18:40 -64.6 Dark Up 41.3 125.6 Up 08:03:40 - 08:33:40 10256
Wenatchee 08:18:40 -64.9 Dark Up 41.4 125.3 Up 08:03:40 - 08:33:40 10230
Ellensburg 08:18:41 -65.3 Dark Up 41.6 124.8 Up 08:03:41 - 08:33:41 10186
Yakima 08:18:41 -65.7 Dark Up 41.8 124.5 Up 08:03:41 - 08:33:41 10144
Pasco 08:18:37 -65.9 Dark Up 42.8 125.8 Up 08:03:37 - 08:33:37 10132
Toppenish/White Swan 08:18:41 -65.9 Dark Up 42.0 124.5 Up 08:03:41 - 08:33:41 10125
PNWRO 08:18:36 -66.2 Dark Up 43.0 125.8 Up 08:03:36 - 08:33:36 10111
George/Umatilla 08:18:40 -66.3 Dark Up 42.8 125.3 Up 08:03:40 - 08:33:40 10096
Goldendale 08:18:44 -66.5 Dark Up 42.1 123.6 Up 08:03:44 - 08:33:44 10064
The Dalles 08:18:45 -66.8 Dark Up 42.0 123.1 Up 08:03:45 - 08:33:45 10036
Maupin 08:18:45 -67.2 Dark Up 42.3 122.9 Up 08:03:45 - 08:33:45 9995
Madras/Culver 08:18:46 -67.7 Dark Up 42.5 122.4 Up 08:03:46 - 08:33:46 9939
Redmond 08:18:45 -68.1 Dark Up 42.7 122.1 Up 08:03:45 - 08:33:45 9902
Sisters 08:18:45 -68.1 Dark Up 42.4 121.7 Up 08:03:45 - 08:33:45 9899
Bend 08:18:48 -68.3 Dark Up 42.7 121.8 Up 08:03:48 - 08:33:48 9878
Oregon Observatory 08:18:46 -68.5 Dark Up 42.7 121.5 Up 08:03:46 - 08:33:46 9858
La Pine/Gilchrist 08:18:47 -68.7 Dark Up 42.8 121.3 Up 08:03:47 - 08:33:47 9837
North Lake 08:18:45 -69.1 Dark Up 43.4 121.5 Up 08:03:45 - 08:33:45 9801
Niwot 08:17:46 -66.8 Dark Up 54.3 137.6 Up 08:02:46 - 08:32:46 9791
Paisley 08:18:44 -69.6 Dark Up 43.9 121.5 Up 08:03:44 - 08:33:44 9750
Chiloquin 08:18:51 -69.8 Dark Up 43.2 120.0 Up 08:03:51 - 08:33:51 9717
Lakeview 08:18:44 -70.1 Dark Up 44.3 121.2 Up 08:03:44 - 08:33:44 9701
Klamath Falls 08:18:48 -70.2 Dark Up 43.4 119.8 Up 08:03:48 - 08:33:48 9683
Tulelake 08:18:48 -70.4 Dark Up 43.7 119.9 Up 08:03:48 - 08:33:48 9660
Cedarville 08:18:43 -70.7 Dark Up 44.7 120.9 Up 08:03:43 - 08:33:43 9636
Fall River/Burney 08:18:48 -71.3 Dark Up 44.2 119.2 Up 08:03:48 - 08:33:48 9567
Susanville 08:18:45 -71.9 Dark Up 45.0 119.4 Up 08:03:45 - 08:33:45 9513
Gimple 08:18:46 -72.2 Dark Up 45.0 119.0 Up 08:03:46 - 08:33:46 9481
Greenville 08:18:46 -72.2 Dark Up 44.9 118.9 Up 08:03:46 - 08:33:46 9480
Quincy 08:18:46 -72.4 Dark Up 45.0 118.7 Up 08:03:46 - 08:33:46 9459
Portola 08:18:44 -72.5 Dark Up 45.4 119.1 Up 08:03:44 - 08:33:44 9453
Reno 08:18:42 -72.6 Dark Up 46.0 119.5 Up 08:03:42 - 08:33:42 9436
Carson City 08:18:42 -73.0 Dark Up 46.2 119.2 Up 08:03:42 - 08:33:42 9399
Yerington 08:18:40 -73.1 Dark Up 46.7 119.7 Up 08:03:40 - 08:33:40 9389
Gardnerville 08:18:42 -73.2 Dark Up 46.3 119.0 Up 08:03:42 - 08:33:42 9374
Hawthorne 08:18:38 -73.4 Dark Up 47.3 119.8 Up 08:03:38 - 08:33:38 9350
Tonopah 08:18:33 -73.6 Dark Up 48.5 120.8 Up 08:03:33 - 08:33:33 9326
Lee Vining 08:18:40 -74.1 Dark Up 47.2 118.7 Up 08:03:40 - 08:33:40 9282
Bishop 08:18:37 -74.5 Dark Up 48.0 118.9 Up 08:03:37 - 08:33:37 9232
Beatty 08:18:31 -74.5 Dark Up 49.3 120.1 Up 08:03:31 - 08:33:31 9214
Indian Springs 08:18:27 -74.4 Dark Up 50.2 121.0 Up 08:03:27 - 08:33:27 9200
Lone Pine 08:18:36 -75.1 Dark Up 48.6 118.5 Up 08:03:36 - 08:33:36 9158
Henderson 08:18:24 -74.7 Dark Up 51.0 121.1 Up 08:03:24 - 08:33:24 9158
Patrick 08:18:19 -74.7 Dark Up 52.1 121.7 Up 08:03:19 - 08:33:19 9115
Searchlight/Boulder City 08:18:24 -75.1 Dark Up 51.3 120.6 Up 08:03:24 - 08:33:24 9099
DCO 08:18:17 -74.6 Dark Up 52.7 122.2 Up 08:03:17 - 08:33:17 9098
Kingman/Dolan Springs 08:18:21 -75.0 Dark Up 52.1 121.2 Up 08:03:21 - 08:33:21 9088
Laughlin/Bullhead City 08:18:22 -75.2 Dark Up 51.7 120.7 Up 08:03:22 - 08:33:22 9075
Mohave Valley 08:18:22 -75.5 Dark Up 51.9 120.4 Up 08:03:22 - 08:33:22 9046
Lake Havasu City 08:18:21 -75.7 Dark Up 52.2 120.2 Up 08:03:21 - 08:33:21 9009
CPSLO 08:18:46 -76.9 Dark Up 47.3 114.7 Up 08:03:46 - 08:33:46 8975
Parker 08:18:20 -76.0 Dark Up 52.4 119.8 Up 08:03:20 - 08:33:20 8973
Blythe 08:18:22 -76.5 Dark Up 52.5 118.9 Up 08:03:22 - 08:33:22 8911
Wildwood 08:18:38 -77.7 Dark Up 49.3 115.4 Up 08:03:38 - 08:33:38 8882
Idyllwild 08:18:30 -77.4 Dark Up 50.9 116.8 Up 08:03:30 - 08:33:30 8880
Calipatria 08:18:25 -77.4 Dark Up 52.0 117.4 Up 08:03:25 - 08:33:25 8839
Yuma 08:18:21 -77.3 Dark Up 52.9 117.8 Up 08:03:21 - 08:33:21 8812

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 12CS57, (2020/01/07 08:15UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  2.85  87
27Nu Leo       09:58:13.3 +12:26:41  5.3  1.29  84
PPM 126989     09:58:39.4 +10:57:38  7.7  0.42  85
PPM 126964     09:57:36.1 +11:23:11 10.0  0.23  84
12CS57         09:57:11.9 +11:11:02 15.6        84
Positions are for J2000

Event circumstances last updated at 2018/03/01 18:13:41 UT

Marc W. Buie, Southwest Research Institute

RECON