RECON: TNO occultation with 308634

Event between (308634) 05XU100 and star GA0980:03595694 with event index number of 339256

Geocentric closest approach at 2020/02/29 07:38:30 UTC

J2000 position of star is 10:14:49.7 +08:44:48
Equinox of date position of star is 10:15:52.4 +08:38:52
Stellar brightness G=13.8, use SENSEUP=64
Star is 110 degrees from the moon. Moon is 27% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 43.1 AU from the Sun and 42.2 AU from the Earth.
The TNO is moving 25.4 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 244 seconds.
The 1-sigma cross-track error in the shadow position is 4133 km.
The sky-plane scale is 30576.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 13.0 sec chord
Diameter=135.2 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 308634, (2020/02/29 07:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.6 +11:52:04  1.3  3.59 108
31 Leo         10:08:58.4 +09:53:53  6.0  2.12 108
PPM 156653     10:16:01.5 +09:06:37  8.0  0.47 110
PPM 156641     10:15:32.0 +08:31:09  9.5  0.15 110
308634         10:15:53.5 +08:38:45 13.8       111
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 3.7 sigma about the mid-time.
The median site spacing is 19.9 km RECON observability=1.0 and success probability=8.2%
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 07:39:25 -47.0 Dark Down 48.5 180.6 Up 07:24:25 - 07:54:25 3866
Kelowna 07:39:25 -47.4 Dark Down 48.9 180.4 Up 07:24:25 - 07:54:25 3832
Summerland 07:39:25 -47.6 Dark Down 49.1 180.1 Up 07:24:25 - 07:54:25 3807
Penticton 07:39:25 -47.7 Dark Down 49.2 180.3 Up 07:24:25 - 07:54:25 3804
Oliver 07:39:24 -48.1 Dark Down 49.6 180.3 Up 07:24:24 - 07:54:24 3776
Anarchist Mountain Observatory 07:39:24 -48.2 Dark Down 49.7 180.6 Up 07:24:24 - 07:54:24 3767
Tonasket 07:39:23 -48.5 Dark Down 50.0 180.5 Up 07:24:23 - 07:54:23 3741
Okanogan 07:39:23 -48.8 Dark Down 50.4 180.2 Up 07:24:23 - 07:54:23 3710
Brewster 07:39:24 -49.1 Dark Down 50.7 179.9 Up 07:24:24 - 07:54:24 3683
Manson/Chelan 07:39:25 -49.2 Dark Down 50.9 179.3 Up 07:24:25 - 07:54:25 3657
Entiat 07:39:25 -49.4 Dark Down 51.1 179.2 Up 07:24:25 - 07:54:25 3637
Victoria 07:39:34 -48.1 Dark Down 50.1 174.4 Up 07:24:34 - 07:54:34 3629
Wenatchee 07:39:25 -49.7 Dark Down 51.3 179.1 Up 07:24:25 - 07:54:25 3614
Ellensburg 07:39:25 -50.0 Dark Down 51.7 178.7 Up 07:24:25 - 07:54:25 3574
Pasco 07:39:20 -51.0 Dark Down 52.5 181.0 Up 07:24:20 - 07:54:20 3549
Yakima 07:39:24 -50.4 Dark Down 52.2 178.7 Up 07:24:24 - 07:54:24 3540
PNWRO 07:39:18 -51.2 Dark Down 52.7 181.3 Up 07:24:18 - 07:54:18 3534
Toppenish/White Swan 07:39:24 -50.7 Dark Down 52.4 178.9 Up 07:24:24 - 07:54:24 3526
Goldendale 07:39:24 -51.1 Dark Down 52.9 178.2 Up 07:24:24 - 07:54:24 3469
The Dalles 07:39:25 -51.3 Dark Down 53.1 177.6 Up 07:24:25 - 07:54:25 3440
Niwot 07:38:30 -57.1 Dark Down 56.1 206.1 Up 07:23:30 - 07:53:30 3437
SwRI 07:38:29 -57.3 Dark Down 56.3 206.0 Up 07:23:29 - 07:53:29 3425
Maupin 07:39:24 -51.7 Dark Down 53.6 177.8 Up 07:24:24 - 07:54:24 3408
Redmond 07:39:23 -52.6 Dark Down 54.5 177.5 Up 07:24:23 - 07:54:23 3328
Sisters 07:39:25 -52.5 Dark Down 54.4 176.9 Up 07:24:25 - 07:54:25 3320
Bend 07:39:23 -52.7 Dark Down 54.7 177.3 Up 07:24:23 - 07:54:23 3306
Oregon Observatory 07:39:24 -52.9 Dark Down 54.8 177.1 Up 07:24:24 - 07:54:24 3288
La Pine/Gilchrist 07:39:24 -53.1 Dark Down 55.0 176.9 Up 07:24:24 - 07:54:24 3269
North Lake 07:39:22 -53.6 Dark Down 55.5 177.9 Up 07:24:22 - 07:54:22 3247
Paisley 07:39:20 -54.2 Dark Down 56.0 178.5 Up 07:24:20 - 07:54:20 3209
Lakeview 07:39:19 -54.7 Dark Down 56.6 178.9 Up 07:24:19 - 07:54:19 3170
Klamath Falls 07:39:23 -54.4 Dark Down 56.5 176.3 Up 07:24:23 - 07:54:23 3134
Cedarville 07:39:17 -55.4 Dark Down 57.2 179.1 Up 07:24:17 - 07:54:17 3117
Fall River/Burney 07:39:21 -55.6 Dark Down 57.7 176.9 Up 07:24:21 - 07:54:21 3040
Susanville 07:39:17 -56.4 Dark Down 58.3 178.2 Up 07:24:17 - 07:54:17 3005
Gimple 07:39:18 -56.6 Dark Down 58.6 177.8 Up 07:24:18 - 07:54:18 2974
Greenville 07:39:17 -56.6 Dark Down 58.6 177.6 Up 07:24:17 - 07:54:17 2971
Portola 07:39:16 -57.0 Dark Down 58.9 178.5 Up 07:24:16 - 07:54:16 2956
Quincy 07:39:17 -56.8 Dark Down 58.8 177.6 Up 07:24:17 - 07:54:17 2953
Reno 07:39:14 -57.4 Dark Down 59.2 179.8 Up 07:24:14 - 07:54:14 2950
Yerington 07:39:10 -58.0 Dark Down 59.8 181.0 Up 07:24:10 - 07:54:10 2920
Carson City 07:39:13 -57.7 Dark Down 59.6 179.8 Up 07:24:13 - 07:54:13 2919
Gardnerville 07:39:13 -58.0 Dark Down 59.8 179.9 Up 07:24:13 - 07:54:13 2898
Hawthorne 07:39:08 -58.6 Dark Down 60.2 182.1 Up 07:24:08 - 07:54:08 2893
Tonopah 07:39:03 -59.3 Dark Down 60.6 184.9 Up 07:24:03 - 07:54:03 2893
Lee Vining 07:39:09 -59.0 Dark Down 60.8 181.1 Up 07:24:09 - 07:54:09 2828
Indian Springs 07:38:56 -60.9 Dark Down 61.9 188.3 Up 07:23:56 - 07:53:56 2805
Beatty 07:39:01 -60.5 Dark Down 61.7 186.0 Up 07:24:01 - 07:54:01 2802
Bishop 07:39:06 -59.8 Dark Down 61.4 182.6 Up 07:24:06 - 07:54:06 2794
Henderson 07:38:54 -61.5 Dark Down 62.4 189.9 Up 07:23:54 - 07:53:54 2777
Patrick 07:38:49 -62.3 Dark Down 62.8 192.5 Up 07:23:49 - 07:53:49 2755
DCO 07:38:46 -62.6 Dark Down 63.0 194.1 Up 07:23:46 - 07:53:46 2750
Kingman/Dolan Springs 07:38:49 -62.5 Dark Down 63.1 192.2 Up 07:23:49 - 07:53:49 2729
Searchlight/Boulder City 07:38:52 -62.1 Dark Down 62.9 190.2 Up 07:23:52 - 07:53:52 2727
Laughlin/Bullhead City 07:38:50 -62.4 Dark Down 63.2 191.0 Up 07:23:50 - 07:53:50 2710
Mohave Valley 07:38:50 -62.7 Dark Down 63.4 191.2 Up 07:23:50 - 07:53:50 2685
George/Scottsdale 07:38:40 -64.0 Dark Down 64.0 197.6 Up 07:23:40 - 07:53:40 2664
Lake Havasu City 07:38:49 -63.1 Dark Down 63.8 191.9 Up 07:23:49 - 07:53:49 2657
Parker 07:38:48 -63.5 Dark Down 64.1 192.1 Up 07:23:48 - 07:53:48 2625
Blythe 07:38:49 -64.0 Dark Down 64.7 191.6 Up 07:23:49 - 07:53:49 2567
CPSLO 07:39:11 -61.2 Dark Down 63.4 177.8 Up 07:24:11 - 07:54:11 2535
Idyllwild 07:38:56 -63.6 Dark Down 64.9 186.8 Up 07:23:56 - 07:53:56 2511
Calipatria 07:38:51 -64.4 Dark Down 65.3 189.7 Up 07:23:51 - 07:53:51 2491
Wildwood 07:39:03 -62.9 Dark Down 64.6 182.4 Up 07:24:03 - 07:54:03 2485
Yuma 07:38:48 -64.9 Dark Down 65.6 191.9 Up 07:23:48 - 07:53:48 2479

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 308634, (2020/02/29 07:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  3.59 108
31 Leo         10:07:54.2 +09:59:50  6.0  2.12 108
PPM 156653     10:14:57.5 +09:12:39  8.0  0.47 110
PPM 156641     10:14:28.2 +08:37:11  9.5  0.15 110
308634         10:14:49.7 +08:44:48 13.8       110
Positions are for J2000

Event circumstances last updated at 2019/10/15 22:11:40 UT

Marc W. Buie, Southwest Research Institute

RECON