RECON: TNO occultation with 01KD77

Event between 01KD77 and star UC4-343-170637 with event index number of 122847

Geocentric closest approach at 2018/05/11 10:35:45 UTC

J2000 position of star is 18:44:04.5 -21:34:13
Equinox of date position of star is 18:45:06.8 -21:33:06
Stellar brightness R=15.4, use SENSEUP=128
Star is 79 degrees from the moon. Moon is 19% illuminated.
TNO apparent brightness V=21.3

[RECON map]
TNO is 36.4 AU from the Sun and 35.7 AU from the Earth.
The TNO is moving 13.6 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 560 seconds.
The 1-sigma cross-track error in the shadow position is 1671 km.
The sky-plane scale is 25917.7 km/arcsec.

The TNO has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 33.9 sec chord
Diameter=188.3 km assuming a 30% albedo -- 13.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 01KD77, (2018/05/11 10:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.2 -26:28:16  0.9 31.05 109
Nunki          18:56:24.1 -26:16:20  2.0  5.37  76
28 Sgr         18:47:27.0 -22:22:17  4.9  0.98  78
PPM 268766     18:43:05.1 -21:18:13  8.5  0.54  79
PPM 268844     18:46:08.6 -21:30:30  8.8  0.23  79
01KD77         18:45:10.4 -21:33:02 15.4        79
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 1.6 sigma about the mid-time.
The median site spacing is 13.3 km RECON observability=0.9 and success probability=0.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 10:36:29 -14.0 AT Down 18.7 168.1 Really Low 10:21:29 - 10:51:29 6634
Tonasket 10:36:29 -14.2 AT Down 18.9 168.0 Really Low 10:21:29 - 10:51:29 6626
Okanogan 10:36:30 -14.5 AT Down 19.2 167.9 Really Low 10:21:30 - 10:51:30 6613
Brewster 10:36:32 -14.8 AT Down 19.4 167.7 Really Low 10:21:32 - 10:51:32 6602
Manson/Chelan 10:36:34 -15.1 AT Down 19.6 167.3 Really Low 10:21:34 - 10:51:34 6593
Entiat 10:36:35 -15.3 AT Down 19.8 167.2 Really Low 10:21:35 - 10:51:35 6584
Wenatchee 10:36:36 -15.6 AT Down 20.0 167.1 Low 10:21:36 - 10:51:36 6574
Ellensburg 10:36:38 -16.0 AT Down 20.4 166.9 Low 10:21:38 - 10:51:38 6556
Yakima 10:36:38 -16.3 AT Down 20.8 166.8 Low 10:21:38 - 10:51:38 6540
Toppenish/White Swan 10:36:38 -16.4 AT Down 21.0 167.0 Low 10:21:38 - 10:51:38 6531
Pasco 10:36:31 -16.0 AT Down 21.3 168.2 Low 10:21:31 - 10:51:31 6529
PNWRO 10:36:30 -16.0 AT Down 21.6 168.4 Low 10:21:30 - 10:51:30 6520
George/Umatilla 10:36:33 -16.3 AT Down 21.6 167.9 Low 10:21:33 - 10:51:33 6515
Goldendale 10:36:41 -17.0 AT Down 21.5 166.5 Low 10:21:41 - 10:51:41 6507
The Dalles 10:36:43 -17.4 AT Down 21.7 166.1 Low 10:21:43 - 10:51:43 6496
Maupin 10:36:44 -17.6 AT Down 22.1 166.2 Low 10:21:44 - 10:51:44 6478
Madras/Culver 10:36:44 -18.1 Dark Down 22.6 166.1 Low 10:21:44 - 10:51:44 6454
Redmond 10:36:44 -18.4 Dark Down 22.9 166.0 Low 10:21:44 - 10:51:44 6438
Sisters 10:36:47 -18.5 Dark Down 22.9 165.6 Low 10:21:47 - 10:51:47 6438
Bend 10:36:46 -18.6 Dark Down 23.1 165.9 Low 10:21:46 - 10:51:46 6428
Oregon Observatory 10:36:47 -18.8 Dark Down 23.3 165.7 Low 10:21:47 - 10:51:47 6420
La Pine/Gilchrist 10:36:47 -19.0 Dark Down 23.5 165.6 Low 10:21:47 - 10:51:47 6410
North Lake 10:36:44 -19.0 Dark Down 24.0 166.2 Low 10:21:44 - 10:51:44 6392
Paisley 10:36:43 -19.3 Dark Down 24.6 166.5 Low 10:21:43 - 10:51:43 6366
Chiloquin 10:36:51 -20.0 Dark Down 24.5 165.2 Low 10:21:51 - 10:51:51 6356
Lakeview 10:36:44 -19.6 Dark Down 25.1 166.6 Low 10:21:44 - 10:51:44 6342
Klamath Falls 10:36:52 -20.2 Dark Down 24.8 165.2 Low 10:21:52 - 10:51:52 6339
Tulelake 10:36:51 -20.3 Dark Down 25.1 165.5 Low 10:21:51 - 10:51:51 6327
Cedarville 10:36:43 -20.0 Dark Down 25.8 166.7 Low 10:21:43 - 10:51:43 6310
Fall River/Burney 10:36:51 -21.0 Dark Down 26.0 165.5 Low 10:21:51 - 10:51:51 6282
Susanville 10:36:47 -21.1 Dark Down 26.8 166.1 Low 10:21:47 - 10:51:47 6252
Gimple 10:36:49 -21.4 Dark Down 27.0 165.9 Low 10:21:49 - 10:51:49 6236
Greenville 10:36:51 -21.4 Dark Down 27.0 165.8 Low 10:21:51 - 10:51:51 6236
Quincy 10:36:50 -21.6 Dark Down 27.2 165.8 Low 10:21:50 - 10:51:50 6226
Niwot 10:35:15 -12.9 AT Up 28.3 181.9 Low 10:20:15 - 10:50:15 6225
Portola 10:36:47 -21.5 Dark Down 27.4 166.2 Low 10:21:47 - 10:51:47 6221
Reno 10:36:43 -21.3 Dark Down 27.8 166.9 Low 10:21:43 - 10:51:43 6209
Carson City 10:36:44 -21.6 Dark Down 28.1 166.8 Low 10:21:44 - 10:51:44 6189
Yerington 10:36:41 -21.4 Dark Down 28.4 167.5 Low 10:21:41 - 10:51:41 6180
Gardnerville 10:36:43 -21.8 Dark Down 28.4 166.9 Low 10:21:43 - 10:51:43 6176
Hawthorne 10:36:39 -21.5 Dark Down 29.0 168.0 Low 10:21:39 - 10:51:39 6156
Tonopah 10:36:29 -21.1 Dark Down 29.6 169.4 Low 10:21:29 - 10:51:29 6133
Lee Vining 10:36:41 -22.2 Dark Down 29.4 167.4 Low 10:21:41 - 10:51:41 6124
Bishop 10:36:38 -22.2 Dark Down 30.1 168.1 Up 10:21:38 - 10:51:38 6091
Beatty 10:36:28 -21.7 Dark Down 30.8 169.7 Up 10:21:28 - 10:51:28 6067
Indian Springs 10:36:23 -21.3 Dark Down 31.3 170.8 Up 10:21:23 - 10:51:23 6049
Lone Pine 10:36:36 -22.6 Dark Down 30.9 168.3 Up 10:21:36 - 10:51:36 6048
Henderson 10:36:18 -21.3 Dark Down 31.9 171.5 Up 10:21:18 - 10:51:18 6018
Searchlight/Boulder City 10:36:18 -21.6 Dark Up 32.5 171.5 Up 10:21:18 - 10:51:18 5984
Patrick 10:36:11 -21.1 Dark Up 32.7 172.6 Up 10:21:11 - 10:51:11 5981
Kingman/Dolan Springs 10:36:13 -21.3 Dark Up 32.9 172.4 Up 10:21:13 - 10:51:13 5967
Laughlin/Bullhead City 10:36:17 -21.6 Dark Up 32.8 171.9 Up 10:21:17 - 10:51:17 5965
CPSLO 10:36:55 -24.9 Dark Down 31.7 165.4 Up 10:21:55 - 10:51:55 5963
DCO 10:36:07 -20.9 Dark Up 33.0 173.4 Up 10:21:07 - 10:51:07 5962
Mohave Valley 10:36:16 -21.8 Dark Up 33.1 171.8 Up 10:21:16 - 10:51:16 5949
Lake Havasu City 10:36:15 -22.0 Dark Up 33.5 172.1 Up 10:21:15 - 10:51:15 5924
Parker 10:36:15 -22.2 Dark Up 33.9 172.1 Up 10:21:15 - 10:51:15 5902
Wildwood 10:36:42 -24.7 Dark Down 33.3 167.4 Up 10:21:42 - 10:51:42 5895
Idyllwild 10:36:30 -23.9 Dark Down 34.0 169.4 Up 10:21:30 - 10:51:30 5877
Blythe 10:36:17 -22.7 Dark Up 34.4 171.7 Up 10:21:17 - 10:51:17 5869
Calipatria 10:36:25 -23.6 Dark Down 34.7 170.6 Up 10:21:25 - 10:51:25 5838
Yuma 10:36:19 -23.4 Dark Up 35.3 171.6 Up 10:21:19 - 10:51:19 5810

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 01KD77, (2018/05/11 10:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 31.05 109
Nunki          18:55:15.9 -26:17:49  2.0  5.37  76
28 Sgr         18:46:20.7 -22:23:32  4.9  0.98  78
PPM 268766     18:41:59.3 -21:19:21  8.5  0.54  79
PPM 268844     18:45:02.7 -21:31:43  8.8  0.23  79
01KD77         18:44:04.5 -21:34:13 15.4        79
Positions are for J2000

Event circumstances last updated at 2017/05/13 17:34:58 UT

Marc W. Buie, Southwest Research Institute

RECON