RECON: TNO occultation with 427507

Event between (427507) 02DH5 and star GA0920:04296714 with event index number of 279339

Geocentric closest approach at 2020/07/08 08:58:49 UTC

J2000 position of star is 16:12:42.6 +02:21:49
Equinox of date position of star is 16:13:43.8 +02:18:47
Stellar brightness G=15.9, use SENSEUP=128
Star is 87 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 23.1 AU from the Sun and 22.4 AU from the Earth.
The TNO is moving 16.8 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 296 seconds.
The 1-sigma cross-track error in the shadow position is 2401 km.
The sky-plane scale is 16266.8 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=57.5 km assuming a 5% albedo -- 3.6 sec chord
Diameter=23.5 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 427507, (2020/07/08 08:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.1 -26:28:33  0.9 29.08  75
1Del Oph       16:15:25.4 -03:44:45  2.7  6.07  85
PPM 162147     16:01:52.3 +04:22:17  5.8  3.61  90
PPM 162367     16:15:24.1 +02:35:47  7.6  0.50  86
PPM 162375     16:15:36.0 +02:10:53 10.0  0.48  86
PPM 162338     16:13:22.7 +02:28:31 10.5  0.19  87
427507         16:13:44.7 +02:18:44 15.9        86
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 23.3 km RECON observability=1.0 and success probability=4.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 08:54:08 -16.5 AT Up 21.8 245.6 Low 08:39:08 - 09:09:08 6762
Kelowna 08:54:07 -16.9 AT Up 22.1 245.7 Low 08:39:07 - 09:09:07 6728
Peachland 08:54:08 -17.0 AT Up 22.3 245.4 Low 08:39:08 - 09:09:08 6721
Summerland 08:54:07 -17.1 AT Up 22.3 245.6 Low 08:39:07 - 09:09:07 6706
Penticton 08:54:07 -17.2 AT Up 22.3 245.7 Low 08:39:07 - 09:09:07 6699
Oliver 08:54:05 -17.5 AT Up 22.4 245.8 Low 08:39:05 - 09:09:05 6667
Anarchist Mountain Observatory 08:54:05 -17.7 AT Up 22.4 246.1 Low 08:39:05 - 09:09:05 6649
Victoria 08:54:13 -18.6 Dark Up 25.0 242.7 Low 08:39:13 - 09:09:13 6644
Tonasket 08:54:05 -18.0 AT Up 22.6 246.1 Low 08:39:05 - 09:09:05 6621
Okanogan 08:54:03 -18.3 Dark Up 22.8 246.1 Low 08:39:03 - 09:09:03 6591
Brewster 08:54:02 -18.6 Dark Up 23.0 246.0 Low 08:39:02 - 09:09:02 6568
Manson/Chelan 08:54:04 -18.9 Dark Up 23.3 245.8 Low 08:39:04 - 09:09:04 6552
Entiat 08:54:04 -19.1 Dark Up 23.5 245.8 Low 08:39:04 - 09:09:04 6532
Wenatchee 08:54:02 -19.4 Dark Up 23.6 245.8 Low 08:39:02 - 09:09:02 6509
Ellensburg 08:54:03 -19.8 Dark Up 23.9 245.8 Low 08:39:03 - 09:09:03 6473
Yakima 08:54:01 -20.2 Dark Up 24.1 246.0 Low 08:39:01 - 09:09:01 6434
Toppenish/White Swan 08:54:01 -20.4 Dark Up 24.1 246.2 Low 08:39:01 - 09:09:01 6412
Pasco 08:53:57 -20.3 Dark Up 23.3 247.3 Low 08:38:57 - 09:08:57 6388
Goldendale 08:53:59 -21.0 Dark Up 24.6 246.0 Low 08:38:59 - 09:08:59 6364
PNWRO 08:53:55 -20.5 Dark Up 23.3 247.6 Low 08:38:55 - 09:08:55 6362
The Dalles 08:54:01 -21.3 Dark Up 24.9 245.8 Low 08:39:01 - 09:09:01 6346
Maupin 08:54:00 -21.7 Dark Up 25.0 246.1 Low 08:39:00 - 09:09:00 6305
Sisters 08:53:59 -22.6 Dark Up 25.7 246.1 Low 08:38:59 - 09:08:59 6226
Redmond 08:53:59 -22.6 Dark Up 25.4 246.4 Low 08:38:59 - 09:08:59 6220
Bend 08:53:59 -22.8 Dark Up 25.6 246.4 Low 08:38:59 - 09:08:59 6200
Oregon Observatory 08:53:58 -23.0 Dark Up 25.8 246.4 Low 08:38:58 - 09:08:58 6185
La Pine/Gilchrist 08:53:57 -23.2 Dark Up 25.9 246.4 Low 08:38:57 - 09:08:57 6166
North Lake 08:53:55 -23.5 Dark Up 25.7 247.1 Low 08:38:55 - 09:08:55 6117
Paisley 08:53:53 -24.0 Dark Up 25.7 247.6 Low 08:38:53 - 09:08:53 6059
Klamath Falls 08:53:56 -24.7 Dark Up 26.7 246.8 Low 08:38:56 - 09:08:56 6027
Lakeview 08:53:52 -24.5 Dark Up 25.7 248.0 Low 08:38:52 - 09:08:52 6007
Cedarville 08:53:50 -25.1 Dark Up 25.8 248.4 Low 08:38:50 - 09:08:50 5940
Fall River/Burney 08:53:52 -25.8 Dark Up 26.9 247.7 Low 08:38:52 - 09:08:52 5906
Susanville 08:53:49 -26.3 Dark Up 26.6 248.5 Low 08:38:49 - 09:08:49 5835
Greenville 08:53:48 -26.6 Dark Up 26.9 248.4 Low 08:38:48 - 09:08:48 5810
Gimple 08:53:49 -26.6 Dark Up 26.9 248.5 Low 08:38:49 - 09:08:49 5809
Quincy 08:53:48 -26.8 Dark Up 27.0 248.5 Low 08:38:48 - 09:08:48 5790
Portola 08:53:47 -26.8 Dark Up 26.7 249.0 Low 08:38:47 - 09:08:47 5772
Reno 08:53:44 -27.0 Dark Up 26.3 249.6 Low 08:38:44 - 09:08:44 5738
Carson City 08:53:44 -27.3 Dark Up 26.4 249.8 Low 08:38:44 - 09:08:44 5701
Niwot 08:53:14 -22.7 Dark Up 15.4 259.8 Really Low 08:38:14 - 09:08:14 5677
Gardnerville 08:53:44 -27.6 Dark Up 26.5 249.9 Low 08:38:44 - 09:08:44 5676
Yerington 08:53:41 -27.4 Dark Up 26.0 250.3 Low 08:38:41 - 09:08:41 5675
SwRI 08:53:13 -22.8 Dark Up 15.5 259.8 Really Low 08:38:13 - 09:08:13 5666
Hawthorne 08:53:40 -27.8 Dark Up 25.8 250.9 Low 08:38:40 - 09:08:40 5622
Lee Vining 08:53:40 -28.4 Dark Up 26.4 250.8 Low 08:38:40 - 09:08:40 5570
Tonopah 08:53:36 -27.9 Dark Up 24.9 252.2 Low 08:38:36 - 09:08:36 5559
Bishop 08:53:37 -28.9 Dark Up 26.0 251.6 Low 08:38:37 - 09:08:37 5500
Beatty 08:53:32 -29.0 Dark Up 24.9 253.0 Low 08:38:32 - 09:08:32 5435
Indian Springs 08:53:30 -29.0 Dark Up 24.2 253.9 Low 08:38:30 - 09:08:30 5391
Henderson 08:53:25 -29.4 Dark Up 23.8 254.6 Low 08:38:25 - 09:08:25 5328
CPSLO 08:53:41 -31.3 Dark Up 28.4 251.0 Low 08:38:41 - 09:08:41 5314
Searchlight/Boulder City 08:53:25 -29.9 Dark Up 23.9 254.9 Low 08:38:25 - 09:08:25 5268
Patrick 08:53:22 -29.7 Dark Up 23.1 255.6 Low 08:38:22 - 09:08:22 5252
Laughlin/Bullhead City 08:53:24 -30.1 Dark Up 23.7 255.2 Low 08:38:24 - 09:08:24 5233
Kingman/Dolan Springs 08:53:22 -29.9 Dark Up 23.3 255.6 Low 08:38:22 - 09:08:22 5231
DCO 08:53:19 -29.8 Dark Up 22.6 256.2 Low 08:38:19 - 09:08:19 5214
Mohave Valley 08:53:23 -30.3 Dark Up 23.8 255.4 Low 08:38:23 - 09:08:23 5205
Wildwood 08:53:32 -32.1 Dark Up 27.2 253.0 Low 08:38:32 - 09:08:32 5164
Lake Havasu City 08:53:22 -30.7 Dark Up 23.7 255.7 Low 08:38:22 - 09:08:22 5160
Parker 08:53:21 -31.0 Dark Up 23.8 255.9 Low 08:38:21 - 09:08:21 5123
Idyllwild 08:53:27 -32.0 Dark Up 25.8 254.5 Low 08:38:27 - 09:08:27 5105
Blythe 08:53:21 -31.6 Dark Up 24.1 255.9 Low 08:38:21 - 09:08:21 5071
George/Scottsdale 08:53:15 -30.7 Dark Up 21.9 257.6 Low 08:38:15 - 09:08:15 5056
Calipatria 08:53:24 -32.3 Dark Up 25.0 255.5 Low 08:38:24 - 09:08:24 5028
Yuma 08:53:19 -32.5 Dark Up 24.4 256.3 Low 08:38:19 - 09:08:19 4974

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 427507, (2020/07/08 08:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.08  75
1Del Oph       16:14:20.7 -03:41:42  2.7  6.07  85
PPM 162147     16:00:51.1 +04:25:40  5.8  3.61  90
PPM 162367     16:14:22.1 +02:38:49  7.6  0.50  86
PPM 162375     16:14:33.9 +02:13:55 10.0  0.48  86
PPM 162338     16:12:20.7 +02:31:36 10.5  0.19  87
427507         16:12:42.6 +02:21:49 15.9        87
Positions are for J2000

Event circumstances last updated at 2020/03/16 21:50:00 UT

Marc W. Buie, Southwest Research Institute

RECON