RECON: TNO occultation with 01KD77

Event between 01KD77 and star UC4-342-161281 with event index number of 125355

Geocentric closest approach at 2018/06/21 08:01:55 UTC

J2000 position of star is 18:40:50.9 -21:37:02
Equinox of date position of star is 18:41:55.4 -21:35:57
Stellar brightness R=14.4, use SENSEUP=128
Star is 89 degrees from the moon. Moon is 60% illuminated.
TNO apparent brightness V=21.2

[RECON map]
TNO is 36.4 AU from the Sun and 35.4 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 299 seconds.
The 1-sigma cross-track error in the shadow position is 1634 km.
The sky-plane scale is 25677.4 km/arcsec.

The TNO has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 19.4 sec chord
Diameter=188.3 km assuming a 30% albedo -- 7.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 01KD77, (2018/06/21 08:02UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.6 -26:28:17  0.9 30.31  60
Nunki          18:56:24.6 -26:16:20  2.0  5.72  92
PPM 268697     18:39:59.5 -21:02:06  6.1  0.73  88
PPM 268766     18:43:05.5 -21:18:13  8.5  0.40  89
PPM 268736     18:41:49.2 -21:38:23  9.0  0.05  88
01KD77         18:41:57.4 -21:35:55 14.4        89
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 3.0 sigma about the mid-time.
The median site spacing is 12.0 km RECON observability=0.9 and success probability=13.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:02:07 -17.6 AT Up 18.9 170.5 Really Low 07:47:07 - 08:17:07 144
Tonasket 08:02:07 -17.9 AT Up 19.2 170.5 Really Low 07:47:07 - 08:17:07 135
Okanogan 08:02:08 -18.2 Dark Up 19.5 170.3 Really Low 07:47:08 - 08:17:08 123
Brewster 08:02:08 -18.5 Dark Up 19.7 170.1 Really Low 07:47:08 - 08:17:08 113
Manson/Chelan 08:02:10 -18.7 Dark Up 19.9 169.8 Really Low 07:47:10 - 08:17:10 105
Entiat 08:02:10 -18.9 Dark Up 20.1 169.7 Low 07:47:10 - 08:17:10 96
Wenatchee 08:02:11 -19.2 Dark Up 20.3 169.6 Low 07:47:11 - 08:17:11 87
Ellensburg 08:02:11 -19.6 Dark Up 20.7 169.3 Low 07:47:11 - 08:17:11 70
Yakima 08:02:12 -20.0 Dark Up 21.1 169.3 Low 07:47:12 - 08:17:12 54
Toppenish/White Swan 08:02:11 -20.2 Dark Up 21.3 169.4 Low 07:47:11 - 08:17:11 45
Pasco 08:02:08 -20.3 Dark Up 21.6 170.7 Low 07:47:08 - 08:17:08 39
PNWRO 08:02:07 -20.6 Dark Up 21.9 170.9 Low 07:47:07 - 08:17:07 29
George/Umatilla 08:02:08 -20.6 Dark Up 21.9 170.4 Low 07:47:08 - 08:17:08 26
Goldendale 08:02:13 -20.7 Dark Up 21.8 169.0 Low 07:47:13 - 08:17:13 22
The Dalles 08:02:15 -21.0 Dark Up 22.0 168.6 Low 07:47:15 - 08:17:15 13
Maupin 08:02:15 -21.4 Dark Up 22.4 168.7 Low 07:47:15 - 08:17:15 -5
Madras/Culver 08:02:15 -21.9 Dark Up 23.0 168.6 Low 07:47:15 - 08:17:15 -29
Sisters 08:02:17 -22.3 Dark Up 23.2 168.1 Low 07:47:17 - 08:17:17 -44
Redmond 08:02:15 -22.3 Dark Up 23.3 168.5 Low 07:47:15 - 08:17:15 -45
Bend 08:02:16 -22.5 Dark Up 23.5 168.4 Low 07:47:16 - 08:17:16 -55
Oregon Observatory 08:02:17 -22.7 Dark Up 23.6 168.2 Low 07:47:17 - 08:17:17 -63
La Pine/Gilchrist 08:02:17 -22.9 Dark Up 23.8 168.1 Low 07:47:17 - 08:17:17 -72
North Lake 08:02:15 -23.3 Dark Up 24.3 168.7 Low 07:47:15 - 08:17:15 -92
Paisley 08:02:15 -23.9 Dark Up 24.9 169.0 Low 07:47:15 - 08:17:15 -118
Chiloquin 08:02:19 -24.0 Dark Up 24.9 167.7 Low 07:47:19 - 08:17:19 -124
Klamath Falls 08:02:19 -24.3 Dark Up 25.2 167.7 Low 07:47:19 - 08:17:19 -141
Lakeview 08:02:15 -24.4 Dark Up 25.5 169.2 Low 07:47:15 - 08:17:15 -142
Tulelake 08:02:19 -24.6 Dark Up 25.5 168.0 Low 07:47:19 - 08:17:19 -154
Cedarville 08:02:14 -25.0 Dark Up 26.1 169.3 Low 07:47:14 - 08:17:14 -175
Fall River/Burney 08:02:19 -25.5 Dark Up 26.4 168.0 Low 07:47:19 - 08:17:19 -199
Susanville 08:02:17 -26.1 Dark Up 27.2 168.7 Low 07:47:17 - 08:17:17 -231
Greenville 08:02:18 -26.4 Dark Up 27.4 168.4 Low 07:47:18 - 08:17:18 -245
Gimple 08:02:18 -26.4 Dark Up 27.4 168.4 Low 07:47:18 - 08:17:18 -245
Quincy 08:02:18 -26.6 Dark Up 27.6 168.3 Low 07:47:18 - 08:17:18 -255
Portola 08:02:17 -26.8 Dark Up 27.8 168.8 Low 07:47:17 - 08:17:17 -262
Reno 08:02:15 -27.0 Dark Up 28.1 169.5 Low 07:47:15 - 08:17:15 -276
Carson City 08:02:15 -27.4 Dark Up 28.5 169.4 Low 07:47:15 - 08:17:15 -295
Yerington 08:02:12 -27.6 Dark Up 28.8 170.1 Low 07:47:12 - 08:17:12 -306
Gardnerville 08:02:15 -27.6 Dark Up 28.7 169.5 Low 07:47:15 - 08:17:15 -309
Niwot 08:01:23 -25.0 Dark Down 28.1 184.7 Low 07:46:23 - 08:16:23 -313
Hawthorne 08:02:11 -28.0 Dark Up 29.3 170.6 Low 07:47:11 - 08:17:11 -332
Tonopah 08:02:06 -28.4 Dark Up 29.9 172.0 Low 07:47:06 - 08:17:06 -360
Lee Vining 08:02:13 -28.6 Dark Up 29.8 170.0 Low 07:47:13 - 08:17:13 -363
Bishop 08:02:11 -29.2 Dark Up 30.5 170.7 Up 07:47:11 - 08:17:11 -397
Beatty 08:02:05 -29.6 Dark Up 31.1 172.4 Up 07:47:05 - 08:17:05 -427
Lone Pine 08:02:10 -29.9 Dark Up 31.3 171.0 Up 07:47:10 - 08:17:10 -441
Indian Springs 08:02:01 -29.8 Dark Up 31.5 173.6 Up 07:47:01 - 08:17:01 -448
Henderson 08:01:59 -30.3 Dark Up 32.1 174.3 Up 07:46:59 - 08:16:59 -482
CPSLO 08:02:20 -31.3 Dark Up 32.2 168.1 Up 07:47:20 - 08:17:20 -515
Searchlight/Boulder City 08:01:59 -30.9 Dark Up 32.7 174.3 Up 07:46:59 - 08:16:59 -516
Patrick 08:01:55 -30.9 Dark Up 32.8 175.4 Up 07:46:55 - 08:16:55 -523
Laughlin/Bullhead City 08:01:58 -31.2 Dark Up 33.0 174.7 Up 07:46:58 - 08:16:58 -535
Kingman/Dolan Springs 08:01:56 -31.1 Dark Up 33.0 175.2 Up 07:46:56 - 08:16:56 -536
DCO 08:01:53 -31.1 Dark Up 33.2 176.2 Up 07:46:53 - 08:16:53 -545
Mohave Valley 08:01:58 -31.4 Dark Up 33.3 174.6 Up 07:46:58 - 08:16:58 -552
Lake Havasu City 08:01:57 -31.8 Dark Up 33.7 174.9 Up 07:46:57 - 08:16:57 -577
Wildwood 08:02:14 -32.5 Dark Up 33.7 170.2 Up 07:47:14 - 08:17:14 -591
Parker 08:01:57 -32.2 Dark Up 34.1 174.9 Up 07:46:57 - 08:16:57 -599
Idyllwild 08:02:07 -32.7 Dark Up 34.3 172.2 Up 07:47:07 - 08:17:07 -617
Blythe 08:01:58 -32.7 Dark Up 34.6 174.5 Up 07:46:58 - 08:16:58 -631
Calipatria 08:02:02 -33.3 Dark Up 35.0 173.5 Up 07:47:02 - 08:17:02 -658
Yuma 08:01:59 -33.6 Dark Up 35.5 174.4 Up 07:46:59 - 08:16:59 -689

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, (2018/06/21 08:02UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.31  60
Nunki          18:55:15.9 -26:17:49  2.0  5.72  92
PPM 268697     18:38:53.3 -21:03:10  6.1  0.73  88
PPM 268766     18:41:59.3 -21:19:21  8.5  0.40  89
PPM 268736     18:40:42.8 -21:39:29  9.0  0.05  88
01KD77         18:40:50.9 -21:37:02 14.4        88
Positions are for J2000

Event circumstances last updated at 2017/12/04 18:46:25 UT

Marc W. Buie, Southwest Research Institute

RECON