RECON: TNO occultation with 52975

Event between (52975) Cyllarus and star UC4-615-041901 with event index number of 101216

Geocentric closest approach at 2018/01/28 11:39:04 UTC

J2000 position of star is 07:39:51.3 +32:58:43
Equinox of date position of star is 07:40:58.1 +32:56:15
Stellar brightness R=12.2, use SENSEUP=16
Star is 30 degrees from the moon. Moon is 87% 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 23.9 km/sec on the sky relative to the star, or, 4.5 arcsec/hr.
The 1-sigma error in the time of the event is 833 seconds.
The 1-sigma cross-track error in the shadow position is 5352 km.
The sky-plane scale is 19283.9 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 -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 52975, (2018/01/28 11:39UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.2 +27:58:52  1.1  5.09  30
PPM 073009     07:41:03.3 +31:58:00  6.4  0.97  30
PPM 072993     07:39:30.7 +33:08:41  8.1  0.38  30
PPM 073007     07:40:45.0 +32:53:56  9.3  0.07  30
52975          07:41:01.0 +32:56:09 12.2        30
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 1.1 sigma about the mid-time.
The median site spacing is 15.4 km RECON observability=1.0 and success probability=5.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 11:36:00 -30.0 Dark Down 26.4 292.1 Low 11:21:00 - 11:51:00 -1958
Oroville 11:36:40 -38.6 Dark Up 38.4 278.4 Up 11:21:40 - 11:51:40 -1978
Tonasket 11:36:40 -38.6 Dark Up 38.4 278.6 Up 11:21:40 - 11:51:40 -1994
Okanogan 11:36:38 -38.8 Dark Up 38.5 278.8 Up 11:21:38 - 11:51:38 -2024
Brewster 11:36:37 -39.0 Dark Up 38.5 278.9 Up 11:21:37 - 11:51:37 -2051
Manson/Chelan 11:36:37 -39.3 Dark Up 38.8 278.8 Up 11:21:37 - 11:51:37 -2081
Entiat 11:36:36 -39.5 Dark Up 38.8 278.9 Up 11:21:36 - 11:51:36 -2099
Wenatchee 11:36:36 -39.6 Dark Up 38.8 279.0 Up 11:21:36 - 11:51:36 -2121
Pasco 11:36:30 -39.2 Dark Up 37.8 280.7 Up 11:21:30 - 11:51:30 -2154
Ellensburg 11:36:35 -39.9 Dark Up 38.9 279.2 Up 11:21:35 - 11:51:35 -2160
PNWRO 11:36:29 -39.1 Dark Up 37.6 281.0 Up 11:21:29 - 11:51:29 -2162
George/Umatilla 11:36:29 -39.4 Dark Up 37.9 280.8 Up 11:21:29 - 11:51:29 -2188
Yakima 11:36:33 -40.0 Dark Up 38.8 279.5 Up 11:21:33 - 11:51:33 -2190
Toppenish/White Swan 11:36:32 -40.0 Dark Up 38.7 279.8 Up 11:21:32 - 11:51:32 -2199
Goldendale 11:36:31 -40.4 Dark Up 38.9 280.0 Up 11:21:31 - 11:51:31 -2257
The Dalles 11:36:30 -40.7 Dark Up 39.1 279.9 Up 11:21:30 - 11:51:30 -2289
Maupin 11:36:29 -40.8 Dark Up 39.0 280.3 Up 11:21:29 - 11:51:29 -2316
Madras/Culver 11:36:27 -41.0 Dark Up 38.9 280.7 Up 11:21:27 - 11:51:27 -2358
Redmond 11:36:25 -41.1 Dark Up 38.9 281.0 Up 11:21:25 - 11:51:25 -2387
Sisters 11:36:26 -41.4 Dark Up 39.2 280.7 Up 11:21:26 - 11:51:26 -2402
Bend 11:36:25 -41.3 Dark Up 38.9 281.1 Up 11:21:25 - 11:51:25 -2409
Oregon Observatory 11:36:25 -41.4 Dark Up 39.0 281.1 Up 11:21:25 - 11:51:25 -2428
La Pine/Gilchrist 11:36:25 -41.5 Dark Up 39.0 281.3 Up 11:21:25 - 11:51:25 -2446
North Lake 11:36:22 -41.2 Dark Up 38.5 281.9 Up 11:21:22 - 11:51:22 -2452
Paisley 11:36:21 -41.1 Dark Up 38.1 282.6 Up 11:21:21 - 11:51:21 -2479
Lakeview 11:36:19 -41.1 Dark Up 37.9 283.1 Up 11:21:19 - 11:51:19 -2509
Chiloquin 11:36:22 -42.0 Dark Up 39.0 281.9 Up 11:21:22 - 11:51:22 -2547
Cedarville 11:36:16 -41.1 Dark Up 37.6 283.6 Up 11:21:16 - 11:51:16 -2551
Klamath Falls 11:36:21 -42.1 Dark Up 38.9 282.2 Up 11:21:21 - 11:51:21 -2570
Tulelake 11:36:19 -41.9 Dark Up 38.6 282.6 Up 11:21:19 - 11:51:19 -2577
Fall River/Burney 11:36:16 -42.1 Dark Up 38.4 283.4 Up 11:21:16 - 11:51:16 -2645
Susanville 11:36:13 -41.7 Dark Up 37.7 284.2 Up 11:21:13 - 11:51:13 -2660
Tonopah 11:36:02 -39.5 Dark Up 34.5 287.5 Up 11:21:02 - 11:51:02 -2683
Reno 11:36:10 -41.3 Dark Up 36.9 285.3 Up 11:21:10 - 11:51:10 -2690
Gimple 11:36:13 -41.9 Dark Up 37.8 284.3 Up 11:21:13 - 11:51:13 -2692
Greenville 11:36:13 -42.0 Dark Up 37.8 284.3 Up 11:21:13 - 11:51:13 -2695
Portola 11:36:11 -41.7 Dark Up 37.4 284.8 Up 11:21:11 - 11:51:11 -2699
Yerington 11:36:07 -40.9 Dark Up 36.2 286.0 Up 11:21:07 - 11:51:07 -2702
Quincy 11:36:12 -42.0 Dark Up 37.8 284.4 Up 11:21:12 - 11:51:12 -2711
Hawthorne 11:36:05 -40.5 Dark Up 35.7 286.5 Up 11:21:05 - 11:51:05 -2714
DCO 11:35:49 -36.6 Dark Up 30.5 291.0 Up 11:20:49 - 11:50:49 -2715
Carson City 11:36:08 -41.3 Dark Up 36.8 285.5 Up 11:21:08 - 11:51:08 -2717
Indian Springs 11:35:56 -38.5 Dark Up 32.9 289.1 Up 11:20:56 - 11:50:56 -2725
Patrick 11:35:50 -37.1 Dark Up 31.2 290.5 Up 11:20:50 - 11:50:50 -2726
Henderson 11:35:53 -38.0 Dark Up 32.2 289.7 Up 11:20:53 - 11:50:53 -2733
Gardnerville 11:36:07 -41.3 Dark Up 36.7 285.7 Up 11:21:07 - 11:51:07 -2734
Beatty 11:35:58 -39.3 Dark Up 33.8 288.4 Up 11:20:58 - 11:50:58 -2752
Kingman/Dolan Springs 11:35:50 -37.3 Dark Up 31.2 290.6 Up 11:20:50 - 11:50:50 -2753
Searchlight/Boulder City 11:35:52 -38.0 Dark Up 32.0 290.1 Up 11:20:52 - 11:50:52 -2775
Laughlin/Bullhead City 11:35:50 -37.7 Dark Up 31.6 290.4 Up 11:20:50 - 11:50:50 -2781
Lee Vining 11:36:04 -41.0 Dark Up 35.9 286.7 Up 11:21:04 - 11:51:04 -2782
Bishop 11:36:01 -40.5 Dark Up 35.2 287.4 Up 11:21:01 - 11:51:01 -2795
Mohave Valley 11:35:49 -37.7 Dark Up 31.5 290.5 Up 11:20:49 - 11:50:49 -2803
Lake Havasu City 11:35:48 -37.6 Dark Up 31.2 290.9 Up 11:20:48 - 11:50:48 -2822
Lone Pine 11:35:58 -40.4 Dark Up 34.7 288.1 Up 11:20:58 - 11:50:58 -2839
Parker 11:35:47 -37.6 Dark Up 31.0 291.1 Up 11:20:47 - 11:50:47 -2849
Blythe 11:35:46 -37.8 Dark Up 31.1 291.2 Up 11:20:46 - 11:50:46 -2906
Yuma 11:35:43 -37.9 Dark Up 30.8 291.7 Up 11:20:43 - 11:50:43 -2983
Calipatria 11:35:46 -38.6 Dark Up 31.6 291.2 Up 11:20:46 - 11:50:46 -2994
Idyllwild 11:35:49 -39.6 Dark Up 32.8 290.4 Up 11:20:49 - 11:50:49 -3004
Wildwood 11:35:52 -41.1 Dark Up 34.4 289.5 Up 11:20:52 - 11:50:52 -3070
CPSLO 11:35:57 -42.6 Dark Up 36.3 287.9 Up 11:20:57 - 11:50:57 -3073

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, (2018/01/28 11:39UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  5.09  30
PPM 073009     07:39:54.0 +32:00:34  6.4  0.97  30
PPM 072993     07:38:20.8 +33:11:12  8.1  0.38  30
PPM 073007     07:39:35.3 +32:56:29  9.3  0.07  30
52975          07:39:51.3 +32:58:43 12.2        30
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:17:07 UT

Marc W. Buie, Southwest Research Institute

RECON