RECON: TNO occultation with 52975

Event between (52975) Cyllarus and star UC4-616-041487 with event index number of 106230

Geocentric closest approach at 2018/02/27 03:06:56 UTC

J2000 position of star is 07:36:17.6 +33:00:44
Equinox of date position of star is 07:37:26.9 +32:58:17
Stellar brightness R=15.7, use SENSEUP=128
Star is 15 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 27.5 AU from the Sun and 26.9 AU from the Earth.
The TNO is moving 15.8 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 1926 seconds.
The 1-sigma cross-track error in the shadow position is 1903 km.
The sky-plane scale is 19500.1 km/arcsec.

The TNO has an absolute magnitude Hv=9.4
Diameter=79.4 km assuming a 5% albedo -- 5.0 sec chord
Diameter=32.4 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 52975, (2018/02/27 03:07UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.5 +27:58:51  1.1  5.35  10
PPM 073009     07:41:03.6 +31:58:00  6.4  1.26  14
PPM 072932     07:35:35.1 +33:04:53  8.1  0.41  16
PPM 072966     07:37:46.2 +33:09:40 11.1  0.20  15
52975          07:37:27.8 +32:58:15 15.7        15
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 0.5 sigma about the mid-time.
The median site spacing is 26.5 km RECON observability=0.9 and success probability=26.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 03:08:59 -15.9 AT Up 63.0 115.2 Up 02:53:59 - 03:23:59 759
Tonasket 03:09:00 -15.9 AT Up 63.1 114.8 Up 02:54:00 - 03:24:00 736
Okanogan 03:09:02 -15.9 AT Up 63.1 114.0 Up 02:54:02 - 03:24:02 707
Brewster 03:09:03 -15.8 AT Up 63.1 113.2 Up 02:54:03 - 03:24:03 685
Manson/Chelan 03:09:05 -15.5 AT Up 63.0 112.4 Up 02:54:05 - 03:24:05 673
Entiat 03:09:06 -15.5 AT Up 63.0 111.9 Up 02:54:06 - 03:24:06 654
Wenatchee 03:09:07 -15.5 AT Up 63.1 111.3 Up 02:54:07 - 03:24:07 631
Ellensburg 03:09:10 -15.4 AT Up 63.1 110.3 Up 02:54:10 - 03:24:10 596
Yakima 03:09:11 -15.4 AT Up 63.2 109.6 Up 02:54:11 - 03:24:11 556
Toppenish/White Swan 03:09:11 -15.5 AT Up 63.4 109.3 Up 02:54:11 - 03:24:11 530
Goldendale 03:09:14 -15.3 AT Up 63.3 107.8 Up 02:54:14 - 03:24:14 486
Pasco 03:09:06 -16.4 AT Up 64.2 110.6 Up 02:54:06 - 03:24:06 486
The Dalles 03:09:16 -15.0 AT Up 63.1 107.0 Up 02:54:16 - 03:24:16 473
George/Umatilla 03:09:08 -16.3 AT Up 64.2 109.7 Up 02:54:08 - 03:24:08 458
PNWRO 03:09:06 -16.6 AT Up 64.5 110.4 Up 02:54:06 - 03:24:06 456
Maupin 03:09:17 -15.1 AT Up 63.3 106.3 Up 02:54:17 - 03:24:17 429
Madras/Culver 03:09:19 -15.1 AT Up 63.4 105.2 Up 02:54:19 - 03:24:19 375
Sisters 03:09:22 -14.8 AT Up 63.2 104.1 Up 02:54:22 - 03:24:22 354
Redmond 03:09:20 -15.1 AT Up 63.5 104.5 Up 02:54:20 - 03:24:20 341
Bend 03:09:21 -15.0 AT Up 63.5 103.9 Up 02:54:21 - 03:24:21 323
Oregon Observatory 03:09:22 -15.0 AT Up 63.4 103.5 Up 02:54:22 - 03:24:22 309
La Pine/Gilchrist 03:09:23 -14.9 AT Up 63.4 103.0 Up 02:54:23 - 03:24:23 290
North Lake 03:09:22 -15.4 AT Up 63.9 102.8 Up 02:54:22 - 03:24:22 230
Chiloquin 03:09:28 -14.7 AT Up 63.4 100.5 Up 02:54:28 - 03:24:28 189
Paisley 03:09:22 -15.7 AT Up 64.3 102.0 Up 02:54:22 - 03:24:22 165
Klamath Falls 03:09:28 -14.8 AT Up 63.5 99.9 Up 02:54:28 - 03:24:28 152
Tulelake 03:09:28 -15.0 AT Up 63.8 99.6 Up 02:54:28 - 03:24:28 116
Lakeview 03:09:22 -15.8 AT Up 64.6 101.2 Up 02:54:22 - 03:24:22 108
Cedarville 03:09:24 -16.0 AT Up 64.8 100.0 Up 02:54:24 - 03:24:24 37
Fall River/Burney 03:09:30 -15.1 AT Up 64.0 97.9 Up 02:54:30 - 03:24:30 22
Susanville 03:09:28 -15.7 AT Up 64.6 97.2 Up 02:54:28 - 03:24:28 -64
Greenville 03:09:31 -15.5 AT Up 64.5 96.4 Up 02:54:31 - 03:24:31 -83
Gimple 03:09:30 -15.6 AT Up 64.5 96.5 Up 02:54:30 - 03:24:30 -86
Quincy 03:09:31 -15.5 AT Up 64.5 96.0 Up 02:54:31 - 03:24:31 -104
Portola 03:09:29 -15.9 AT Up 64.9 96.1 Up 02:54:29 - 03:24:29 -131
Reno 03:09:27 -16.4 AT Up 65.4 96.1 Up 02:54:27 - 03:24:27 -176
Carson City 03:09:28 -16.4 AT Up 65.4 95.3 Up 02:54:28 - 03:24:28 -214
Gardnerville 03:09:28 -16.5 AT Up 65.5 94.8 Up 02:54:28 - 03:24:28 -240
Yerington 03:09:25 -16.9 AT Up 65.9 95.4 Up 02:54:25 - 03:24:25 -252
Hawthorne 03:09:24 -17.3 AT Up 66.4 94.7 Up 02:54:24 - 03:24:24 -314
Lee Vining 03:09:28 -17.0 AT Up 66.0 93.1 Up 02:54:28 - 03:24:28 -359
Tonopah 03:09:19 -18.5 Dark Up 67.5 94.7 Up 02:54:19 - 03:24:19 -401
Bishop 03:09:26 -17.6 AT Up 66.6 92.2 Up 02:54:26 - 03:24:26 -441
Niwot 03:08:15 -27.2 Dark Up 75.9 115.3 Up 02:53:15 - 03:23:15 -453
Lone Pine 03:09:26 -17.9 AT Up 66.9 90.7 Up 02:54:26 - 03:24:26 -530
Beatty 03:09:19 -18.9 Dark Up 67.9 92.2 Up 02:54:19 - 03:24:19 -534
CPSLO 03:09:42 -15.9 AT Up 64.8 86.4 Up 02:54:42 - 03:24:42 -590
Indian Springs 03:09:15 -19.8 Dark Up 68.8 92.1 Up 02:54:15 - 03:24:15 -597
Henderson 03:09:13 -20.4 Dark Up 69.4 91.2 Up 02:54:13 - 03:24:13 -672
Searchlight/Boulder City 03:09:13 -20.5 Dark Up 69.4 89.7 Up 02:54:13 - 03:24:13 -734
Patrick 03:09:08 -21.3 Dark Up 70.3 90.1 Up 02:54:08 - 03:24:08 -767
Laughlin/Bullhead City 03:09:12 -20.8 Dark Up 69.7 89.1 Up 02:54:12 - 03:24:12 -774
Wildwood 03:09:35 -17.6 AT Up 66.4 84.6 Up 02:54:35 - 03:24:35 -777
Kingman/Dolan Springs 03:09:10 -21.2 Dark Up 70.1 89.4 Up 02:54:10 - 03:24:10 -786
Mohave Valley 03:09:13 -20.8 Dark Up 69.7 88.3 Up 02:54:13 - 03:24:13 -804
DCO 03:09:05 -21.9 Dark Up 70.8 89.7 Up 02:54:05 - 03:24:05 -817
Lake Havasu City 03:09:12 -21.0 Dark Up 69.9 87.4 Up 02:54:12 - 03:24:12 -852
Idyllwild 03:09:26 -19.1 Dark Up 67.9 84.4 Up 02:54:26 - 03:24:26 -868
Parker 03:09:13 -21.1 Dark Up 69.9 86.4 Up 02:54:13 - 03:24:13 -890
Blythe 03:09:15 -20.9 Dark Up 69.6 84.9 Up 02:54:15 - 03:24:15 -938
Calipatria 03:09:21 -20.1 Dark Up 68.8 83.3 Up 02:54:21 - 03:24:21 -965
Yuma 03:09:17 -20.9 Dark Up 69.5 82.4 Up 02:54:17 - 03:24:17 -1035

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, (2018/02/27 03:07UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  5.35  10
PPM 073009     07:39:54.0 +32:00:34  6.4  1.26  14
PPM 072932     07:34:24.7 +33:07:19  8.1  0.41  16
PPM 072966     07:36:35.9 +33:12:10 11.1  0.20  15
52975          07:36:17.6 +33:00:44 15.7        15
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:18:31 UT

Marc W. Buie, Southwest Research Institute

RECON