RECON: TNO occultation with 52975

Event between (52975) Cyllarus and star UC4-615-041934 with event index number of 101214

Geocentric closest approach at 2018/01/24 13:13:10 UTC

J2000 position of star is 07:40:24.8 +32:57:46
Equinox of date position of star is 07:41:32.7 +32:55:16
Stellar brightness R=13.4, use SENSEUP=32
Star is 83 degrees from the moon. Moon is 46% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 27.5 AU from the Sun and 26.6 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 4.6 arcsec/hr.
The 1-sigma error in the time of the event is 1031 seconds.
The 1-sigma cross-track error in the shadow position is 2135 km.
The sky-plane scale is 19268.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.4
Diameter=79.4 km assuming a 5% albedo -- 3.3 sec chord
Diameter=32.4 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 52975, (2018/01/24 13:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.2 +27:58:52  1.1  5.05  84
PPM 073009     07:41:03.2 +31:58:00  6.4  0.96  83
PPM 072993     07:39:30.6 +33:08:41  8.1  0.49  82
PPM 073007     07:40:45.0 +32:53:56  9.3  0.17  83
52975          07:41:34.5 +32:55:12 13.4        83
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 0.9 sigma about the mid-time.
The median site spacing is 14.6 km RECON observability=0.7 and success probability=0.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 13:10:17 -12.6 AT Down 13.1 302.3 Really Low 12:55:17 - 13:25:17 8774
Oroville 13:10:40 -23.9 Dark Down 26.1 291.1 Low 12:55:40 - 13:25:40 8639
Tonasket 13:10:40 -23.9 Dark Down 26.0 291.2 Low 12:55:40 - 13:25:40 8628
Okanogan 13:10:38 -24.0 Dark Down 26.0 291.3 Low 12:55:38 - 13:25:38 8604
Brewster 13:10:37 -24.1 Dark Down 26.0 291.3 Low 12:55:37 - 13:25:37 8581
Manson/Chelan 13:10:37 -24.4 Dark Down 26.2 291.1 Low 12:55:37 - 13:25:37 8555
Entiat 13:10:36 -24.4 Dark Down 26.1 291.2 Low 12:55:36 - 13:25:36 8540
Wenatchee 13:10:35 -24.5 Dark Down 26.1 291.2 Low 12:55:35 - 13:25:35 8523
Pasco 13:10:31 -23.6 Dark Down 24.9 292.5 Low 12:55:31 - 13:25:31 8509
PNWRO 13:10:30 -23.4 Dark Down 24.7 292.7 Low 12:55:30 - 13:25:30 8505
Ellensburg 13:10:33 -24.6 Dark Down 26.1 291.3 Low 12:55:33 - 13:25:33 8491
George/Umatilla 13:10:29 -23.7 Dark Down 24.9 292.5 Low 12:55:29 - 13:25:29 8481
Yakima 13:10:31 -24.6 Dark Down 26.0 291.5 Low 12:55:31 - 13:25:31 8467
Toppenish/White Swan 13:10:31 -24.5 Dark Down 25.8 291.7 Low 12:55:31 - 13:25:31 8462
Goldendale 13:10:29 -24.8 Dark Down 25.8 291.7 Low 12:55:29 - 13:25:29 8413
The Dalles 13:10:29 -25.0 Dark Down 26.0 291.5 Low 12:55:29 - 13:25:29 8385
Maupin 13:10:27 -24.9 Dark Down 25.8 291.8 Low 12:55:27 - 13:25:27 8365
Madras/Culver 13:10:26 -24.9 Dark Down 25.6 292.0 Low 12:55:26 - 13:25:26 8332
Redmond 13:10:24 -25.0 Dark Down 25.5 292.1 Low 12:55:24 - 13:25:24 8309
Sisters 13:10:24 -25.2 Dark Down 25.8 291.9 Low 12:55:24 - 13:25:24 8292
Bend 13:10:23 -25.1 Dark Down 25.5 292.1 Low 12:55:23 - 13:25:23 8290
Oregon Observatory 13:10:22 -25.1 Dark Down 25.6 292.1 Low 12:55:22 - 13:25:22 8274
North Lake 13:10:20 -24.7 Dark Down 25.0 292.7 Low 12:55:20 - 13:25:20 8259
La Pine/Gilchrist 13:10:21 -25.2 Dark Down 25.5 292.2 Low 12:55:21 - 13:25:21 8259
Paisley 13:10:18 -24.4 Dark Down 24.5 293.1 Low 12:55:18 - 13:25:18 8242
Lakeview 13:10:16 -24.3 Dark Down 24.2 293.5 Low 12:55:16 - 13:25:16 8220
Cedarville 13:10:15 -24.1 Dark Down 23.8 293.8 Low 12:55:15 - 13:25:15 8188
Chiloquin 13:10:18 -25.4 Dark Down 25.4 292.5 Low 12:55:18 - 13:25:18 8175
Klamath Falls 13:10:17 -25.3 Dark Down 25.2 292.7 Low 12:55:17 - 13:25:17 8157
Tulelake 13:10:16 -25.1 Dark Down 24.9 292.9 Low 12:55:16 - 13:25:16 8154
DCO 13:09:54 -17.8 AT Down 16.1 299.3 Really Low 12:54:54 - 13:24:54 8111
Tonopah 13:10:03 -21.5 Dark Down 20.3 296.6 Low 12:55:03 - 13:25:03 8107
Fall River/Burney 13:10:12 -25.0 Dark Down 24.5 293.4 Low 12:55:12 - 13:25:12 8101
Patrick 13:09:55 -18.4 Dark Down 16.7 298.9 Really Low 12:54:55 - 13:24:55 8096
Susanville 13:10:10 -24.4 Dark Down 23.7 294.0 Low 12:55:10 - 13:25:10 8095
Indian Springs 13:09:59 -20.0 Dark Down 18.5 297.8 Really Low 12:54:59 - 13:24:59 8084
Henderson 13:09:57 -19.4 Dark Down 17.8 298.2 Really Low 12:54:57 - 13:24:57 8083
Reno 13:10:07 -23.6 Dark Down 22.8 294.8 Low 12:55:07 - 13:25:07 8079
Yerington 13:10:06 -23.1 Dark Down 22.1 295.3 Low 12:55:06 - 13:25:06 8075
Kingman/Dolan Springs 13:09:55 -18.5 Dark Down 16.7 298.9 Really Low 12:54:55 - 13:24:55 8073
Hawthorne 13:10:04 -22.6 Dark Down 21.5 295.7 Low 12:55:04 - 13:25:04 8070
Gimple 13:10:09 -24.5 Dark Down 23.7 294.0 Low 12:55:09 - 13:25:09 8068
Portola 13:10:08 -24.2 Dark Down 23.3 294.3 Low 12:55:08 - 13:25:08 8066
Greenville 13:10:09 -24.6 Dark Down 23.8 294.0 Low 12:55:09 - 13:25:09 8064
Carson City 13:10:07 -23.6 Dark Down 22.6 294.9 Low 12:55:07 - 13:25:07 8057
Beatty 13:10:00 -20.9 Dark Down 19.5 297.1 Really Low 12:55:00 - 13:25:00 8054
Quincy 13:10:09 -24.5 Dark Down 23.7 294.0 Low 12:55:09 - 13:25:09 8051
Searchlight/Boulder City 13:09:55 -19.3 Dark Down 17.5 298.4 Really Low 12:54:55 - 13:24:55 8049
Laughlin/Bullhead City 13:09:54 -18.9 Dark Down 17.1 298.7 Really Low 12:54:54 - 13:24:54 8046
Gardnerville 13:10:05 -23.5 Dark Down 22.5 295.0 Low 12:55:05 - 13:25:05 8044
Mohave Valley 13:09:53 -18.9 Dark Down 17.0 298.7 Really Low 12:54:53 - 13:24:53 8028
Lake Havasu City 13:09:53 -18.6 Dark Down 16.6 298.9 Really Low 12:54:53 - 13:24:53 8013
Lee Vining 13:10:02 -22.9 Dark Down 21.6 295.7 Low 12:55:02 - 13:25:02 8010
Bishop 13:10:00 -22.3 Dark Down 20.8 296.2 Low 12:55:00 - 13:25:00 8005
Parker 13:09:51 -18.5 Dark Down 16.4 299.0 Really Low 12:54:51 - 13:24:51 7991
Lone Pine 13:09:57 -21.9 Dark Down 20.3 296.6 Low 12:54:57 - 13:24:57 7971
Blythe 13:09:49 -18.7 Dark Down 16.4 299.0 Really Low 12:54:49 - 13:24:49 7941
Yuma 13:09:47 -18.5 Dark Down 16.0 299.3 Really Low 12:54:47 - 13:24:47 7876
Calipatria 13:09:48 -19.4 Dark Down 16.8 298.8 Really Low 12:54:48 - 13:24:48 7861
Idyllwild 13:09:49 -20.4 Dark Down 18.0 298.1 Really Low 12:54:49 - 13:24:49 7844
Wildwood 13:09:50 -22.0 Dark Down 19.5 297.2 Really Low 12:54:50 - 13:24:50 7774
CPSLO 13:09:53 -23.9 Dark Down 21.6 295.9 Low 12:54:53 - 13:24:53 7755

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 52975, (2018/01/24 13:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  5.05  84
PPM 073009     07:39:54.0 +32:00:34  6.4  0.96  83
PPM 072993     07:38:20.8 +33:11:12  8.1  0.49  82
PPM 073007     07:39:35.3 +32:56:29  9.3  0.17  83
52975          07:40:24.8 +32:57:46 13.4        83
Positions are for J2000

Event circumstances last updated at 2017/07/31 16:26:59 UT

Marc W. Buie, Southwest Research Institute

RECON