RECON: TNO occultation with 12CS57

Event between 12CS57 and star GA1000:03395244 with event index number of 249121

Geocentric closest approach at 2020/01/07 08:10:07 UTC

J2000 position of star is 09:57:11.9 +11:11:02
Equinox of date position of star is 09:58:11.0 +11:05:44
Stellar brightness G=15.7, 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 1344 seconds.
The 1-sigma cross-track error in the shadow position is 3482 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 08:10UT)
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 15.7        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 25.2 km RECON observability=1.0 and success probability=1.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 08:13:43 -62.8 Dark Up 39.9 126.3 Up 07:58:43 - 08:28:43 12031
Oroville 08:13:44 -63.4 Dark Up 40.4 126.0 Up 07:58:44 - 08:28:44 11974
Tonasket 08:13:46 -63.6 Dark Up 40.5 125.9 Up 07:58:46 - 08:28:46 11951
Okanogan 08:13:44 -64.0 Dark Up 40.6 125.5 Up 07:58:44 - 08:28:44 11916
Brewster 08:13:46 -64.3 Dark Up 40.7 125.1 Up 07:58:46 - 08:28:46 11886
Manson/Chelan 08:13:47 -64.5 Dark Up 40.6 124.5 Up 07:58:47 - 08:28:47 11860
Entiat 08:13:49 -64.7 Dark Up 40.7 124.3 Up 07:58:49 - 08:28:49 11837
Wenatchee 08:13:46 -65.0 Dark Up 40.8 124.0 Up 07:58:46 - 08:28:46 11811
Ellensburg 08:13:50 -65.4 Dark Up 40.9 123.5 Up 07:58:50 - 08:28:50 11766
Yakima 08:13:53 -65.8 Dark Up 41.1 123.2 Up 07:58:53 - 08:28:53 11726
Pasco 08:13:46 -66.1 Dark Up 42.1 124.4 Up 07:58:46 - 08:28:46 11712
Toppenish/White Swan 08:13:53 -66.0 Dark Up 41.3 123.2 Up 07:58:53 - 08:28:53 11706
PNWRO 08:13:43 -66.3 Dark Up 42.3 124.5 Up 07:58:43 - 08:28:43 11691
George/Umatilla 08:13:49 -66.4 Dark Up 42.2 124.0 Up 07:58:49 - 08:28:49 11675
Goldendale 08:13:50 -66.6 Dark Up 41.3 122.3 Up 07:58:50 - 08:28:50 11645
The Dalles 08:13:52 -66.8 Dark Up 41.3 121.8 Up 07:58:52 - 08:28:52 11617
Maupin 08:13:51 -67.2 Dark Up 41.5 121.6 Up 07:58:51 - 08:28:51 11576
Madras/Culver 08:13:53 -67.8 Dark Up 41.8 121.1 Up 07:58:53 - 08:28:53 11520
Redmond 08:13:54 -68.1 Dark Up 42.0 120.8 Up 07:58:54 - 08:28:54 11483
Sisters 08:13:55 -68.1 Dark Up 41.7 120.4 Up 07:58:55 - 08:28:55 11479
Bend 08:13:53 -68.4 Dark Up 42.0 120.5 Up 07:58:53 - 08:28:53 11459
Oregon Observatory 08:13:53 -68.5 Dark Up 42.0 120.2 Up 07:58:53 - 08:28:53 11439
La Pine/Gilchrist 08:13:56 -68.7 Dark Up 42.1 120.0 Up 07:58:56 - 08:28:56 11417
North Lake 08:13:53 -69.2 Dark Up 42.6 120.3 Up 07:58:53 - 08:28:53 11381
Niwot 08:12:55 -67.4 Dark Up 53.7 135.9 Up 07:57:55 - 08:27:55 11360
Paisley 08:13:52 -69.7 Dark Up 43.1 120.2 Up 07:58:52 - 08:28:52 11330
Chiloquin 08:13:57 -69.9 Dark Up 42.4 118.8 Up 07:58:57 - 08:28:57 11298
Lakeview 08:13:52 -70.2 Dark Up 43.5 120.0 Up 07:58:52 - 08:28:52 11280
Klamath Falls 08:13:56 -70.2 Dark Up 42.6 118.6 Up 07:58:56 - 08:28:56 11264
Tulelake 08:13:55 -70.5 Dark Up 42.9 118.7 Up 07:58:55 - 08:28:55 11240
Cedarville 08:13:50 -70.8 Dark Up 44.0 119.6 Up 07:58:50 - 08:28:50 11215
Fall River/Burney 08:13:55 -71.4 Dark Up 43.4 118.0 Up 07:58:55 - 08:28:55 11147
Susanville 08:13:53 -72.0 Dark Up 44.2 118.2 Up 07:58:53 - 08:28:53 11092
Gimple 08:13:54 -72.3 Dark Up 44.2 117.7 Up 07:58:54 - 08:28:54 11060
Greenville 08:13:56 -72.3 Dark Up 44.1 117.7 Up 07:58:56 - 08:28:56 11059
Quincy 08:13:54 -72.5 Dark Up 44.2 117.5 Up 07:58:54 - 08:28:54 11038
Portola 08:13:53 -72.6 Dark Up 44.6 117.9 Up 07:58:53 - 08:28:53 11032
Reno 08:13:50 -72.8 Dark Up 45.2 118.3 Up 07:58:50 - 08:28:50 11014
Carson City 08:13:50 -73.1 Dark Up 45.3 118.0 Up 07:58:50 - 08:28:50 10977
Yerington 08:13:48 -73.3 Dark Up 45.9 118.4 Up 07:58:48 - 08:28:48 10967
Gardnerville 08:13:53 -73.4 Dark Up 45.5 117.8 Up 07:58:53 - 08:28:53 10952
Hawthorne 08:13:46 -73.6 Dark Up 46.4 118.5 Up 07:58:46 - 08:28:46 10927
Tonopah 08:13:41 -73.8 Dark Up 47.6 119.5 Up 07:58:41 - 08:28:41 10902
Lee Vining 08:13:48 -74.3 Dark Up 46.4 117.5 Up 07:58:48 - 08:28:48 10860
Bishop 08:13:46 -74.7 Dark Up 47.1 117.7 Up 07:58:46 - 08:28:46 10809
Beatty 08:13:39 -74.8 Dark Up 48.5 118.9 Up 07:58:39 - 08:28:39 10789
Indian Springs 08:13:35 -74.9 Dark Up 49.4 119.6 Up 07:58:35 - 08:28:35 10775
Lone Pine 08:13:46 -75.4 Dark Up 47.7 117.3 Up 07:58:46 - 08:28:46 10734
Henderson 08:13:33 -75.1 Dark Up 50.1 119.8 Up 07:58:33 - 08:28:33 10732
Patrick 08:13:28 -75.3 Dark Up 51.2 120.3 Up 07:58:28 - 08:28:28 10688
Searchlight/Boulder City 08:13:32 -75.6 Dark Up 50.5 119.3 Up 07:58:32 - 08:28:32 10673
DCO 08:13:25 -75.2 Dark Up 51.9 120.8 Up 07:58:25 - 08:28:25 10670
Kingman/Dolan Springs 08:13:29 -75.5 Dark Up 51.2 119.9 Up 07:58:29 - 08:28:29 10661
Laughlin/Bullhead City 08:13:30 -75.7 Dark Up 50.9 119.3 Up 07:58:30 - 08:28:30 10648
Mohave Valley 08:13:30 -76.0 Dark Up 51.0 119.0 Up 07:58:30 - 08:28:30 10619
Lake Havasu City 08:13:29 -76.2 Dark Up 51.4 118.9 Up 07:58:29 - 08:28:29 10582
CPSLO 08:13:54 -77.1 Dark Up 46.4 113.5 Up 07:58:54 - 08:28:54 10553
Parker 08:13:30 -76.5 Dark Up 51.6 118.5 Up 07:58:30 - 08:28:30 10546
Blythe 08:13:31 -77.1 Dark Up 51.6 117.6 Up 07:58:31 - 08:28:31 10484
Wildwood 08:13:46 -78.0 Dark Up 48.4 114.2 Up 07:58:46 - 08:28:46 10459
Idyllwild 08:13:39 -77.8 Dark Up 50.0 115.6 Up 07:58:39 - 08:28:39 10455
Calipatria 08:13:34 -77.9 Dark Up 51.1 116.1 Up 07:58:34 - 08:28:34 10413
Yuma 08:13:30 -77.9 Dark Up 52.0 116.5 Up 07:58:30 - 08:28:30 10385

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 08:10UT)
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 15.7        84
Positions are for J2000

Event circumstances last updated at 2018/06/05 18:23:00 UT

Marc W. Buie, Southwest Research Institute

RECON