RECON: TNO occultation with 03QK91

Event between 03QK91 and star GA0840:19940971 with event index number of 1037892

Geocentric closest approach at 2019/12/27 02:52:34 UTC

J2000 position of star is 22:37:07.0 -04:52:17
Equinox of date position of star is 22:38:06.4 -04:46:19
Stellar brightness G=15.0, use SENSEUP=128
Star is 53 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 38.5 AU from the Sun and 38.9 AU from the Earth.
The TNO is moving 19.0 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 342 seconds.
The 1-sigma cross-track error in the shadow position is 3275 km.
The sky-plane scale is 28230.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.2
Diameter=222.9 km assuming a 5% albedo -- 11.7 sec chord
Diameter=91.0 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 03QK91, (2019/12/27 02:53UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:45.0 -29:30:57  1.2 25.22  51
Markab         23:05:45.5 +15:18:47  2.5 21.21  69
63Kap Aqr      22:38:47.4 -04:07:28  5.0  0.66  54
PPM 206558     22:37:20.2 -05:03:03  8.3  0.35  53
PPM 206568     22:37:53.1 -04:54:26  9.9  0.16  53
03QK91         22:38:09.2 -04:46:02 15.0        54
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 2.6 sigma about the mid-time.
The median site spacing is 18.9 km RECON observability=1.0 and success probability=3.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 02:56:09 -26.6 Dark Down 25.1 225.4 Low 02:41:09 - 03:11:09 8818
Kelowna 02:56:11 -26.8 Dark Down 24.9 225.8 Low 02:41:11 - 03:11:11 8814
Penticton 02:56:11 -26.7 Dark Down 25.3 225.7 Low 02:41:11 - 03:11:11 8789
Okanagan Falls 02:56:09 -26.6 Dark Down 25.4 225.8 Low 02:41:09 - 03:11:09 8774
Oliver 02:56:11 -26.6 Dark Down 25.5 225.8 Low 02:41:11 - 03:11:11 8761
Anarchist Mountain Observatory 02:56:11 -26.7 Dark Down 25.5 226.1 Low 02:41:11 - 03:11:11 8743
Oroville 02:56:13 -26.7 Dark Down 25.6 226.0 Low 02:41:13 - 03:11:13 8738
Tonasket 02:56:13 -26.7 Dark Down 25.8 226.1 Low 02:41:13 - 03:11:13 8719
Okanogan 02:56:13 -26.5 Dark Down 26.1 226.1 Low 02:41:13 - 03:11:13 8695
Brewster 02:56:13 -26.4 Dark Down 26.4 226.0 Low 02:41:13 - 03:11:13 8677
Manson/Chelan 02:56:12 -26.1 Dark Down 26.7 225.7 Low 02:41:12 - 03:11:12 8668
Entiat 02:56:12 -26.0 Dark Down 26.9 225.7 Low 02:41:12 - 03:11:12 8651
Wenatchee 02:56:11 -25.9 Dark Down 27.1 225.7 Low 02:41:11 - 03:11:11 8633
Ellensburg 02:56:13 -25.7 Dark Down 27.5 225.7 Low 02:41:13 - 03:11:13 8603
Yakima 02:56:13 -25.7 Dark Down 27.8 225.8 Low 02:41:13 - 03:11:13 8570
Toppenish/White Swan 02:56:14 -25.8 Dark Down 27.9 226.1 Low 02:41:14 - 03:11:14 8548
Goldendale 02:56:13 -25.4 Dark Down 28.5 225.8 Low 02:41:13 - 03:11:13 8511
Pasco 02:56:18 -26.6 Dark Down 27.3 227.3 Low 02:41:18 - 03:11:18 8510
The Dalles 02:56:13 -25.1 Dark Down 28.8 225.6 Low 02:41:13 - 03:11:13 8501
George/Umatilla 02:56:17 -26.4 Dark Down 27.6 227.3 Low 02:41:17 - 03:11:17 8487
PNWRO 02:56:19 -26.8 Dark Down 27.4 227.7 Low 02:41:19 - 03:11:19 8485
Maupin 02:56:12 -25.1 Dark Down 29.1 225.8 Low 02:41:12 - 03:11:12 8463
Madras/Culver 02:56:14 -25.0 Dark Down 29.4 226.0 Low 02:41:14 - 03:11:14 8418
Sisters 02:56:13 -24.6 Dark Down 29.9 225.7 Low 02:41:13 - 03:11:13 8400
Redmond 02:56:14 -24.9 Dark Down 29.7 226.1 Low 02:41:14 - 03:11:14 8388
Bend 02:56:14 -24.8 Dark Down 29.9 226.1 Low 02:41:14 - 03:11:14 8373
Oregon Observatory 02:56:14 -24.7 Dark Down 30.1 226.0 Up 02:41:14 - 03:11:14 8361
La Pine/Gilchrist 02:56:14 -24.6 Dark Down 30.3 226.0 Up 02:41:14 - 03:11:14 8345
North Lake 02:56:16 -24.9 Dark Down 30.3 226.8 Up 02:41:16 - 03:11:16 8294
Chiloquin 02:56:14 -24.1 Dark Down 31.3 226.2 Up 02:41:14 - 03:11:14 8257
Paisley 02:56:18 -25.1 Dark Down 30.5 227.4 Up 02:41:18 - 03:11:18 8237
Klamath Falls 02:56:14 -24.1 Dark Down 31.5 226.4 Up 02:41:14 - 03:11:14 8225
Tulelake 02:56:15 -24.3 Dark Down 31.5 226.8 Up 02:41:15 - 03:11:15 8195
Lakeview 02:56:20 -25.2 Dark Down 30.7 227.8 Up 02:41:20 - 03:11:20 8188
Cedarville 02:56:20 -25.2 Dark Down 31.0 228.3 Up 02:41:20 - 03:11:20 8126
Fall River/Burney 02:56:18 -24.2 Dark Down 32.0 227.3 Up 02:41:18 - 03:11:18 8113
Susanville 02:56:18 -24.6 Dark Down 32.1 228.3 Up 02:41:18 - 03:11:18 8038
Greenville 02:56:20 -24.4 Dark Down 32.4 228.2 Up 02:41:20 - 03:11:20 8021
Gimple 02:56:20 -24.4 Dark Down 32.4 228.3 Up 02:41:20 - 03:11:20 8018
Quincy 02:56:20 -24.3 Dark Down 32.5 228.3 Up 02:41:20 - 03:11:20 8002
Portola 02:56:20 -24.7 Dark Down 32.3 228.8 Up 02:41:20 - 03:11:20 7979
Reno 02:56:24 -25.1 Dark Down 32.1 229.6 Up 02:41:24 - 03:11:24 7939
Carson City 02:56:25 -25.1 Dark Down 32.3 229.8 Up 02:41:25 - 03:11:25 7906
Gardnerville 02:56:25 -25.1 Dark Down 32.5 229.9 Up 02:41:25 - 03:11:25 7883
Yerington 02:56:26 -25.5 Dark Down 32.1 230.5 Up 02:41:26 - 03:11:26 7873
Hawthorne 02:56:29 -25.9 Dark Down 32.1 231.2 Up 02:41:29 - 03:11:29 7817
Lee Vining 02:56:29 -25.4 Dark Down 32.7 231.0 Up 02:41:29 - 03:11:29 7777
Tonopah 02:56:34 -26.9 Dark Down 31.5 232.7 Up 02:41:34 - 03:11:34 7739
Bishop 02:56:30 -25.9 Dark Down 32.6 232.0 Up 02:41:30 - 03:11:30 7704
Niwot 02:57:05 -36.5 Dark Down 22.4 242.2 Low 02:42:05 - 03:12:05 7663
SwRI 02:57:05 -36.4 Dark Down 22.5 242.1 Low 02:42:05 - 03:12:05 7655
Lone Pine 02:56:33 -26.0 Dark Down 32.9 232.7 Up 02:41:33 - 03:11:33 7624
Beatty 02:56:37 -27.1 Dark Down 31.8 233.7 Up 02:41:37 - 03:11:37 7620
CPSLO 02:56:25 -23.6 Dark Down 35.3 231.0 Up 02:41:25 - 03:11:25 7568
Indian Springs 02:56:41 -27.9 Dark Down 31.3 234.9 Up 02:41:41 - 03:11:41 7562
Henderson 02:56:43 -28.4 Dark Down 31.2 235.8 Up 02:41:43 - 03:11:43 7495
Searchlight/Boulder City 02:56:43 -28.3 Dark Down 31.4 236.1 Up 02:41:43 - 03:11:43 7438
Patrick 02:56:47 -29.2 Dark Down 30.7 237.0 Up 02:41:47 - 03:11:47 7407
Laughlin/Bullhead City 02:56:45 -28.6 Dark Down 31.4 236.6 Up 02:41:45 - 03:11:45 7401
Wildwood 02:56:32 -25.1 Dark Down 34.7 233.6 Up 02:41:32 - 03:11:32 7399
Kingman/Dolan Springs 02:56:47 -29.0 Dark Down 31.0 237.0 Up 02:41:47 - 03:11:47 7390
Mohave Valley 02:56:46 -28.5 Dark Down 31.5 236.7 Up 02:41:46 - 03:11:46 7375
DCO 02:56:49 -29.7 Dark Down 30.4 237.8 Up 02:41:49 - 03:11:49 7360
Lake Havasu City 02:56:47 -28.7 Dark Down 31.6 237.1 Up 02:41:47 - 03:11:47 7330
Idyllwild 02:56:39 -26.5 Dark Down 33.6 235.5 Up 02:41:39 - 03:11:39 7316
Parker 02:56:46 -28.6 Dark Down 31.7 237.3 Up 02:41:46 - 03:11:46 7295
Blythe 02:56:46 -28.3 Dark Down 32.2 237.4 Up 02:41:46 - 03:11:46 7251
Calipatria 02:56:43 -27.4 Dark Down 33.2 236.8 Up 02:41:43 - 03:11:43 7227
Yuma 02:56:47 -28.1 Dark Down 32.7 237.8 Up 02:41:47 - 03:11:47 7162

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 03QK91, (2019/12/27 02:53UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 25.22  51
Markab         23:04:45.7 +15:12:18  2.5 21.21  69
63Kap Aqr      22:37:45.3 -04:13:43  5.0  0.66  54
PPM 206558     22:36:17.9 -05:09:18  8.3  0.35  53
PPM 206568     22:36:50.9 -05:00:41  9.9  0.16  53
03QK91         22:37:07.0 -04:52:17 15.0        53
Positions are for J2000

Event circumstances last updated at 2019/01/30 20:48:26 UT

Marc W. Buie, Southwest Research Institute

RECON