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 08:44:45.0 -16:31:18
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 331 seconds.
The 1-sigma cross-track error in the shadow position is 4215 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 -24:21:38  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 2.7 sigma about the mid-time.
The median site spacing is 10.3 km RECON observability=1.0 and success probability=3.7%
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 4842
Tonasket 08:12:15 -55.4 Dark Down 23.7 194.4 Low 07:57:15 - 08:27:15 4833
Okanogan 08:12:14 -55.7 Dark Down 24.1 194.3 Low 07:57:14 - 08:27:14 4817
Brewster 08:12:14 -56.0 Dark Down 24.3 194.1 Low 07:57:14 - 08:27:14 4803
Manson/Chelan 08:12:15 -56.2 Dark Down 24.6 193.8 Low 07:57:15 - 08:27:15 4788
Entiat 08:12:15 -56.4 Dark Down 24.8 193.7 Low 07:57:15 - 08:27:15 4777
Wenatchee 08:12:15 -56.7 Dark Down 25.1 193.6 Low 07:57:15 - 08:27:15 4765
Ellensburg 08:12:15 -57.1 Dark Down 25.5 193.4 Low 07:57:15 - 08:27:15 4744
Pasco 08:12:10 -57.8 Dark Down 26.0 195.0 Low 07:57:10 - 08:27:10 4741
PNWRO 08:12:09 -58.1 Dark Down 26.2 195.3 Low 07:57:09 - 08:27:09 4735
Yakima 08:12:14 -57.5 Dark Down 25.9 193.5 Low 07:57:14 - 08:27:14 4727
George/Umatilla 08:12:10 -58.2 Dark Down 26.4 194.8 Low 07:57:10 - 08:27:10 4722
Toppenish/White Swan 08:12:14 -57.7 Dark Down 26.1 193.7 Low 07:57:14 - 08:27:14 4721
Niwot 08:11:16 -61.2 Dark Down 27.8 210.3 Low 07:56:16 - 08:26:16 4707
Goldendale 08:12:14 -58.2 Dark Down 26.7 193.3 Low 07:57:14 - 08:27:14 4689
The Dalles 08:12:15 -58.4 Dark Down 27.0 192.9 Low 07:57:15 - 08:27:15 4671
Maupin 08:12:14 -58.9 Dark Down 27.4 193.1 Low 07:57:14 - 08:27:14 4655
Madras/Culver 08:12:13 -59.4 Dark Down 27.9 193.1 Low 07:57:13 - 08:27:13 4629
Redmond 08:12:13 -59.8 Dark Down 28.3 193.1 Low 07:57:13 - 08:27:13 4612
Sisters 08:12:15 -59.7 Dark Down 28.3 192.7 Low 07:57:15 - 08:27:15 4605
Bend 08:12:13 -60.0 Dark Down 28.5 193.0 Low 07:57:13 - 08:27:13 4599
Oregon Observatory 08:12:13 -60.1 Dark Down 28.7 192.8 Low 07:57:13 - 08:27:13 4588
La Pine/Gilchrist 08:12:13 -60.3 Dark Down 28.9 192.8 Low 07:57:13 - 08:27:13 4577
North Lake 08:12:11 -60.8 Dark Down 29.2 193.5 Low 07:57:11 - 08:27:11 4570
Paisley 08:12:09 -61.4 Dark Down 29.7 194.0 Low 07:57:09 - 08:27:09 4551
Lakeview 08:12:07 -61.9 Dark Down 30.2 194.2 Up 07:57:07 - 08:27:07 4531
Chiloquin 08:12:13 -61.4 Dark Down 30.1 192.6 Up 07:57:13 - 08:27:13 4516
Cedarville 08:12:06 -62.5 Dark Down 30.8 194.5 Up 07:57:06 - 08:27:06 4502
Klamath Falls 08:12:12 -61.8 Dark Down 30.4 192.7 Up 07:57:12 - 08:27:12 4501
Tulelake 08:12:11 -62.1 Dark Down 30.6 193.0 Up 07:57:11 - 08:27:11 4494
Fall River/Burney 08:12:09 -63.0 Dark Down 31.5 193.2 Up 07:57:09 - 08:27:09 4449
Susanville 08:12:06 -63.6 Dark Down 32.0 194.2 Up 07:57:06 - 08:27:06 4433
Gimple 08:12:06 -63.9 Dark Down 32.3 194.0 Up 07:57:06 - 08:27:06 4414
Greenville 08:12:07 -63.9 Dark Down 32.3 193.9 Up 07:57:07 - 08:27:07 4412
Reno 08:12:02 -64.5 Dark Down 32.6 195.2 Up 07:57:02 - 08:27:02 4406
Portola 08:12:04 -64.2 Dark Down 32.5 194.4 Up 07:57:04 - 08:27:04 4406
Quincy 08:12:06 -64.1 Dark Down 32.5 193.9 Up 07:57:06 - 08:27:06 4401
Yerington 08:11:58 -65.1 Dark Down 33.0 196.0 Up 07:56:58 - 08:26:58 4391
Carson City 08:12:01 -64.9 Dark Down 33.0 195.3 Up 07:57:01 - 08:27:01 4387
Tonopah 08:11:51 -65.9 Dark Down 33.5 198.3 Up 07:56:51 - 08:26:51 4383
Hawthorne 08:11:56 -65.5 Dark Down 33.4 196.7 Up 07:56:56 - 08:26:56 4377
Gardnerville 08:12:01 -65.1 Dark Down 33.2 195.4 Up 07:57:01 - 08:27:01 4375
Lee Vining 08:11:58 -66.1 Dark Down 34.0 196.2 Up 07:56:58 - 08:26:58 4336
Indian Springs 08:11:43 -67.3 Dark Down 34.5 200.3 Up 07:56:43 - 08:26:43 4332
Beatty 08:11:47 -67.1 Dark Down 34.5 199.1 Up 07:56:47 - 08:26:47 4327
Bishop 08:11:54 -66.7 Dark Down 34.4 197.2 Up 07:56:54 - 08:26:54 4318
Henderson 08:11:40 -67.7 Dark Down 34.8 201.2 Up 07:56:40 - 08:26:40 4315
Patrick 08:11:35 -68.1 Dark Down 35.0 202.6 Up 07:56:35 - 08:26:35 4302
DCO 08:11:32 -68.2 Dark Down 35.1 203.5 Up 07:56:32 - 08:26:32 4299
Kingman/Dolan Springs 08:11:35 -68.4 Dark Down 35.3 202.5 Up 07:56:35 - 08:26:35 4285
Searchlight/Boulder City 08:11:38 -68.2 Dark Down 35.3 201.4 Up 07:56:38 - 08:26:38 4284
Lone Pine 08:11:51 -67.4 Dark Down 35.1 197.7 Up 07:56:51 - 08:26:51 4282
Laughlin/Bullhead City 08:11:36 -68.5 Dark Down 35.5 201.9 Up 07:56:36 - 08:26:36 4273
Mohave Valley 08:11:36 -68.7 Dark Down 35.7 202.0 Up 07:56:36 - 08:26:36 4257
Lake Havasu City 08:11:35 -69.1 Dark Down 36.0 202.3 Up 07:56:35 - 08:26:35 4238
Parker 08:11:34 -69.4 Dark Down 36.3 202.5 Up 07:56:34 - 08:26:34 4217
Blythe 08:11:34 -70.0 Dark Down 36.9 202.3 Up 07:56:34 - 08:26:34 4179
CPSLO 08:11:58 -68.7 Dark Down 36.9 195.0 Up 07:56:58 - 08:26:58 4144
Idyllwild 08:11:42 -70.2 Dark Down 37.4 199.9 Up 07:56:42 - 08:26:42 4141
Calipatria 08:11:36 -70.6 Dark Down 37.7 201.4 Up 07:56:36 - 08:26:36 4128
Yuma 08:11:33 -70.9 Dark Down 37.8 202.5 Up 07:56:33 - 08:26:33 4120
Wildwood 08:11:50 -70.0 Dark Down 37.6 197.6 Up 07:56:50 - 08:26:50 4119

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 2017/04/24 16:38:42 UT

Marc W. Buie, Southwest Research Institute

RECON