RECON: TNO occultation with 309139

Event between (309139) 06XQ51 and star UC4-368-051125 with event index number of 181314

Geocentric closest approach at 2019/02/11 08:11:34 UTC

J2000 position of star is 08:43:56.9 -16:27:30
Equinox of date position of star is 08:44:46.7 -16:31:26
Stellar brightness R=15.1, use SENSEUP=128
Star is 100 degrees from the moon. Moon is 34% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 18.1 AU from the Sun and 17.3 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 6.9 arcsec/hr.
The 1-sigma error in the time of the event is 409 seconds.
The 1-sigma cross-track error in the shadow position is 5201 km.
The sky-plane scale is 12520.8 km/arcsec.

The TNO has an absolute magnitude Hv=9.8
Diameter=66.1 km assuming a 5% albedo -- 2.7 sec chord
Diameter=27.0 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 309139, (2019/02/11 08:12UT)
Object            RA         Dec     mag  sep  mel
Adhara         06:59:22.7 -28:59:57  1.5 27.23  78
15Rho Pup      08:08:21.5 -24:21:37  2.8 11.58  92
9 Hya          08:42:36.6 -16:00:47  4.6  0.74  99
PPM 220513     08:43:33.4 -16:03:20  8.3  0.56  99
PPM 220527     08:44:32.9 -16:38:28  8.8  0.13 100
309139         08:44:50.0 -16:31:42 15.1       100
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 2.2 sigma about the mid-time.
The median site spacing is 10.2 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)
Oroville 08:12:15 -55.1 Dark Down 23.5 194.4 Low 07:57:15 - 08:27:15 4836
Tonasket 08:12:15 -55.4 Dark Down 23.7 194.4 Low 07:57:15 - 08:27:15 4827
Okanogan 08:12:14 -55.7 Dark Down 24.1 194.3 Low 07:57:14 - 08:27:14 4812
Brewster 08:12:15 -56.0 Dark Down 24.3 194.1 Low 07:57:15 - 08:27:15 4797
Manson/Chelan 08:12:16 -56.2 Dark Down 24.6 193.8 Low 07:57:16 - 08:27:16 4782
Entiat 08:12:16 -56.4 Dark Down 24.8 193.7 Low 07:57:16 - 08:27:16 4771
Wenatchee 08:12:16 -56.7 Dark Down 25.1 193.6 Low 07:57:16 - 08:27:16 4759
Ellensburg 08:12:16 -57.1 Dark Down 25.5 193.4 Low 07:57:16 - 08:27:16 4738
Pasco 08:12:10 -57.8 Dark Down 26.0 195.0 Low 07:57:10 - 08:27:10 4735
PNWRO 08:12:10 -58.1 Dark Down 26.2 195.3 Low 07:57:10 - 08:27:10 4729
Yakima 08:12:15 -57.5 Dark Down 25.9 193.5 Low 07:57:15 - 08:27:15 4720
George/Umatilla 08:12:10 -58.2 Dark Down 26.4 194.8 Low 07:57:10 - 08:27:10 4717
Toppenish/White Swan 08:12:14 -57.7 Dark Down 26.1 193.7 Low 07:57:14 - 08:27:14 4715
Niwot 08:11:17 -61.2 Dark Down 27.8 210.4 Low 07:56:17 - 08:26:17 4700
Goldendale 08:12:15 -58.2 Dark Down 26.7 193.3 Low 07:57:15 - 08:27:15 4682
The Dalles 08:12:16 -58.4 Dark Down 27.0 192.9 Low 07:57:16 - 08:27:16 4665
Maupin 08:12:15 -58.9 Dark Down 27.4 193.1 Low 07:57:15 - 08:27:15 4648
Madras/Culver 08:12:14 -59.4 Dark Down 27.9 193.1 Low 07:57:14 - 08:27:14 4623
Redmond 08:12:14 -59.8 Dark Down 28.3 193.1 Low 07:57:14 - 08:27:14 4605
Sisters 08:12:15 -59.7 Dark Down 28.3 192.7 Low 07:57:15 - 08:27:15 4597
Bend 08:12:14 -60.0 Dark Down 28.5 193.0 Low 07:57:14 - 08:27:14 4592
Oregon Observatory 08:12:14 -60.1 Dark Down 28.7 192.8 Low 07:57:14 - 08:27:14 4581
La Pine/Gilchrist 08:12:14 -60.3 Dark Down 28.9 192.8 Low 07:57:14 - 08:27:14 4570
North Lake 08:12:11 -60.8 Dark Down 29.2 193.5 Low 07:57:11 - 08:27:11 4563
Paisley 08:12:09 -61.4 Dark Down 29.7 194.0 Low 07:57:09 - 08:27:09 4544
Lakeview 08:12:08 -61.9 Dark Down 30.2 194.2 Up 07:57:08 - 08:27:08 4523
Chiloquin 08:12:13 -61.4 Dark Down 30.1 192.6 Up 07:57:13 - 08:27:13 4508
Cedarville 08:12:06 -62.5 Dark Down 30.8 194.5 Up 07:57:06 - 08:27:06 4494
Klamath Falls 08:12:13 -61.8 Dark Down 30.4 192.7 Up 07:57:13 - 08:27:13 4493
Tulelake 08:12:11 -62.1 Dark Down 30.6 193.0 Up 07:57:11 - 08:27:11 4486
Fall River/Burney 08:12:10 -63.0 Dark Down 31.5 193.3 Up 07:57:10 - 08:27:10 4442
Susanville 08:12:07 -63.6 Dark Down 32.0 194.2 Up 07:57:07 - 08:27:07 4426
Gimple 08:12:07 -63.9 Dark Down 32.3 194.0 Up 07:57:07 - 08:27:07 4406
Greenville 08:12:07 -63.9 Dark Down 32.3 193.9 Up 07:57:07 - 08:27:07 4405
Reno 08:12:02 -64.5 Dark Down 32.6 195.2 Up 07:57:02 - 08:27:02 4399
Portola 08:12:05 -64.2 Dark Down 32.5 194.4 Up 07:57:05 - 08:27:05 4398
Quincy 08:12:07 -64.1 Dark Down 32.5 193.9 Up 07:57:07 - 08:27:07 4394
Yerington 08:12:00 -65.1 Dark Down 33.0 196.0 Up 07:57:00 - 08:27:00 4383
Carson City 08:12:02 -64.9 Dark Down 33.0 195.3 Up 07:57:02 - 08:27:02 4380
Tonopah 08:11:52 -65.9 Dark Down 33.5 198.3 Up 07:56:52 - 08:26:52 4375
Hawthorne 08:11:57 -65.5 Dark Down 33.4 196.7 Up 07:56:57 - 08:26:57 4370
Gardnerville 08:12:02 -65.1 Dark Down 33.2 195.4 Up 07:57:02 - 08:27:02 4367
Lee Vining 08:11:58 -66.1 Dark Down 34.0 196.2 Up 07:56:58 - 08:26:58 4327
Indian Springs 08:11:44 -67.3 Dark Down 34.5 200.3 Up 07:56:44 - 08:26:44 4325
Beatty 08:11:49 -67.1 Dark Down 34.5 199.1 Up 07:56:49 - 08:26:49 4320
Bishop 08:11:54 -66.7 Dark Down 34.4 197.2 Up 07:56:54 - 08:26:54 4310
Henderson 08:11:40 -67.7 Dark Down 34.8 201.2 Up 07:56:40 - 08:26:40 4309
Patrick 08:11:36 -68.1 Dark Down 35.0 202.6 Up 07:56:36 - 08:26:36 4296
DCO 08:11:33 -68.2 Dark Down 35.1 203.5 Up 07:56:33 - 08:26:33 4292
Kingman/Dolan Springs 08:11:36 -68.4 Dark Down 35.3 202.5 Up 07:56:36 - 08:26:36 4279
Searchlight/Boulder City 08:11:40 -68.2 Dark Down 35.3 201.4 Up 07:56:40 - 08:26:40 4277
Lone Pine 08:11:52 -67.4 Dark Down 35.1 197.7 Up 07:56:52 - 08:26:52 4274
Laughlin/Bullhead City 08:11:38 -68.5 Dark Down 35.5 201.9 Up 07:56:38 - 08:26:38 4266
Mohave Valley 08:11:37 -68.7 Dark Down 35.7 202.0 Up 07:56:37 - 08:26:37 4250
Lake Havasu City 08:11:36 -69.1 Dark Down 36.0 202.4 Up 07:56:36 - 08:26:36 4232
Parker 08:11:35 -69.4 Dark Down 36.3 202.5 Up 07:56:35 - 08:26:35 4211
Blythe 08:11:35 -70.0 Dark Down 36.9 202.3 Up 07:56:35 - 08:26:35 4173
CPSLO 08:11:59 -68.7 Dark Down 36.9 195.0 Up 07:56:59 - 08:26:59 4137
Idyllwild 08:11:43 -70.2 Dark Down 37.4 199.9 Up 07:56:43 - 08:26:43 4133
Calipatria 08:11:38 -70.6 Dark Down 37.7 201.4 Up 07:56:38 - 08:26:38 4122
Yuma 08:11:34 -70.9 Dark Down 37.8 202.5 Up 07:56:34 - 08:26:34 4114
Wildwood 08:11:50 -70.0 Dark Down 37.6 197.6 Up 07:56:50 - 08:26:50 4112

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 309139, (2019/02/11 08:12UT)
Object            RA         Dec     mag  sep  mel
Adhara         06:58:37.6 -28:58:19  1.5 27.23  78
15Rho Pup      08:07:32.5 -24:18:15  2.8 11.58  92
9 Hya          08:41:43.4 -15:56:38  4.6  0.74  99
PPM 220513     08:42:40.2 -15:59:10  8.3  0.56  99
PPM 220527     08:43:39.9 -16:34:16  8.8  0.13 100
309139         08:43:56.9 -16:27:30 15.1       100
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:14:15 UT

Marc W. Buie, Southwest Research Institute

RECON