RECON: TNO occultation with 309139

Event between (309139) 06XQ51 and star GA0720:04065974 with event index number of 338976

Geocentric closest approach at 2019/02/11 08:11:59 UTC

J2000 position of star is 08:43:56.9 -16:27:30
Equinox of date position of star is 08:44:49.2 -16:31:38
Stellar brightness G=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 447 seconds.
The 1-sigma cross-track error in the shadow position is 5690 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 2.0 sigma about the mid-time.
The median site spacing is 8.5 km RECON observability=1.0 and success probability=3.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:12:44 -54.2 Dark Down 22.5 194.5 Low 07:57:44 - 08:27:44 4808
Summerland 08:12:44 -54.2 Dark Down 22.6 194.1 Low 07:57:44 - 08:27:44 4799
Penticton 08:12:44 -54.5 Dark Down 22.9 194.3 Low 07:57:44 - 08:27:44 4792
Okanagan Falls 08:12:44 -54.7 Dark Down 23.1 194.3 Low 07:57:44 - 08:27:44 4784
Oliver 08:12:44 -54.9 Dark Down 23.2 194.4 Low 07:57:44 - 08:27:44 4779
Anarchist Mountain Observatory 08:12:44 -55.1 Dark Down 23.4 194.6 Low 07:57:44 - 08:27:44 4776
Oroville 08:12:44 -55.1 Dark Down 23.5 194.5 Low 07:57:44 - 08:27:44 4772
Tonasket 08:12:44 -55.4 Dark Down 23.7 194.5 Low 07:57:44 - 08:27:44 4763
Okanogan 08:12:44 -55.7 Dark Down 24.0 194.4 Low 07:57:44 - 08:27:44 4748
Brewster 08:12:44 -56.0 Dark Down 24.3 194.2 Low 07:57:44 - 08:27:44 4733
Manson/Chelan 08:12:44 -56.2 Dark Down 24.6 193.9 Low 07:57:44 - 08:27:44 4717
Entiat 08:12:44 -56.4 Dark Down 24.8 193.8 Low 07:57:44 - 08:27:44 4707
Wenatchee 08:12:44 -56.7 Dark Down 25.1 193.8 Low 07:57:44 - 08:27:44 4695
Ellensburg 08:12:44 -57.1 Dark Down 25.5 193.6 Low 07:57:44 - 08:27:44 4673
Pasco 08:12:36 -57.8 Dark Down 26.0 195.1 Low 07:57:36 - 08:27:36 4670
PNWRO 08:12:35 -58.1 Dark Down 26.2 195.4 Low 07:57:35 - 08:27:35 4665
Yakima 08:12:44 -57.5 Dark Down 25.9 193.6 Low 07:57:44 - 08:27:44 4656
George/Umatilla 08:12:36 -58.2 Dark Down 26.4 194.9 Low 07:57:36 - 08:27:36 4652
Toppenish/White Swan 08:12:40 -57.7 Dark Down 26.1 193.8 Low 07:57:40 - 08:27:40 4650
Niwot 08:11:43 -61.1 Dark Down 27.8 210.5 Low 07:56:43 - 08:26:43 4635
Goldendale 08:12:40 -58.2 Dark Down 26.7 193.4 Low 07:57:40 - 08:27:40 4617
The Dalles 08:12:44 -58.5 Dark Down 27.0 193.1 Low 07:57:44 - 08:27:44 4600
Maupin 08:12:40 -58.9 Dark Down 27.4 193.2 Low 07:57:40 - 08:27:40 4584
Madras/Culver 08:12:40 -59.4 Dark Down 27.9 193.2 Low 07:57:40 - 08:27:40 4558
Redmond 08:12:39 -59.8 Dark Down 28.3 193.2 Low 07:57:39 - 08:27:39 4540
Sisters 08:12:40 -59.7 Dark Down 28.3 192.8 Low 07:57:40 - 08:27:40 4533
Bend 08:12:39 -60.0 Dark Down 28.5 193.1 Low 07:57:39 - 08:27:39 4527
Oregon Observatory 08:12:39 -60.1 Dark Down 28.7 193.0 Low 07:57:39 - 08:27:39 4516
La Pine/Gilchrist 08:12:39 -60.4 Dark Down 28.9 192.9 Low 07:57:39 - 08:27:39 4505
North Lake 08:12:37 -60.8 Dark Down 29.2 193.6 Low 07:57:37 - 08:27:37 4498
Paisley 08:12:35 -61.4 Dark Down 29.7 194.1 Low 07:57:35 - 08:27:35 4479
Lakeview 08:12:34 -61.9 Dark Down 30.2 194.4 Up 07:57:34 - 08:27:34 4458
Chiloquin 08:12:39 -61.4 Dark Down 30.0 192.7 Up 07:57:39 - 08:27:39 4444
Cedarville 08:12:33 -62.5 Dark Down 30.8 194.6 Up 07:57:33 - 08:27:33 4429
Klamath Falls 08:12:38 -61.8 Dark Down 30.4 192.8 Up 07:57:38 - 08:27:38 4429
Tulelake 08:12:37 -62.1 Dark Down 30.6 193.2 Up 07:57:37 - 08:27:37 4422
Fall River/Burney 08:12:35 -63.0 Dark Down 31.5 193.4 Up 07:57:35 - 08:27:35 4377
Susanville 08:12:32 -63.6 Dark Down 31.9 194.3 Up 07:57:32 - 08:27:32 4361
Gimple 08:12:33 -63.9 Dark Down 32.2 194.1 Up 07:57:33 - 08:27:33 4342
Greenville 08:12:33 -63.9 Dark Down 32.3 194.0 Up 07:57:33 - 08:27:33 4340
Reno 08:12:28 -64.5 Dark Down 32.6 195.3 Up 07:57:28 - 08:27:28 4334
Portola 08:12:31 -64.3 Dark Down 32.5 194.6 Up 07:57:31 - 08:27:31 4334
Quincy 08:12:33 -64.1 Dark Down 32.4 194.0 Up 07:57:33 - 08:27:33 4329
Yerington 08:12:25 -65.1 Dark Down 33.0 196.1 Up 07:57:25 - 08:27:25 4319
Carson City 08:12:27 -64.9 Dark Down 33.0 195.4 Up 07:57:27 - 08:27:27 4315
Tonopah 08:12:17 -65.9 Dark Down 33.5 198.4 Up 07:57:17 - 08:27:17 4311
Hawthorne 08:12:23 -65.5 Dark Down 33.3 196.8 Up 07:57:23 - 08:27:23 4305
Gardnerville 08:12:27 -65.1 Dark Down 33.2 195.5 Up 07:57:27 - 08:27:27 4303
Lee Vining 08:12:23 -66.1 Dark Down 34.0 196.4 Up 07:57:23 - 08:27:23 4263
Indian Springs 08:12:10 -67.2 Dark Down 34.5 200.5 Up 07:57:10 - 08:27:10 4260
Beatty 08:12:14 -67.0 Dark Down 34.4 199.2 Up 07:57:14 - 08:27:14 4256
Bishop 08:12:20 -66.7 Dark Down 34.4 197.3 Up 07:57:20 - 08:27:20 4246
Henderson 08:12:06 -67.7 Dark Down 34.8 201.3 Up 07:57:06 - 08:27:06 4244
Patrick 08:12:02 -68.1 Dark Down 35.0 202.7 Up 07:57:02 - 08:27:02 4231
DCO 08:11:58 -68.2 Dark Down 35.1 203.6 Up 07:56:58 - 08:26:58 4227
Kingman/Dolan Springs 08:12:02 -68.3 Dark Down 35.3 202.6 Up 07:57:02 - 08:27:02 4214
Searchlight/Boulder City 08:12:05 -68.2 Dark Down 35.3 201.6 Up 07:57:05 - 08:27:05 4212
Lone Pine 08:12:18 -67.4 Dark Down 35.0 197.8 Up 07:57:18 - 08:27:18 4210
Laughlin/Bullhead City 08:12:04 -68.5 Dark Down 35.5 202.0 Up 07:57:04 - 08:27:04 4202
Mohave Valley 08:12:03 -68.7 Dark Down 35.7 202.1 Up 07:57:03 - 08:27:03 4186
Lake Havasu City 08:12:02 -69.1 Dark Down 36.0 202.5 Up 07:57:02 - 08:27:02 4167
Parker 08:12:01 -69.4 Dark Down 36.3 202.6 Up 07:57:01 - 08:27:01 4146
Blythe 08:12:01 -70.0 Dark Down 36.9 202.4 Up 07:57:01 - 08:27:01 4108
CPSLO 08:12:25 -68.7 Dark Down 36.9 195.1 Up 07:57:25 - 08:27:25 4072
Idyllwild 08:12:09 -70.2 Dark Down 37.4 200.0 Up 07:57:09 - 08:27:09 4068
Calipatria 08:12:03 -70.6 Dark Down 37.6 201.5 Up 07:57:03 - 08:27:03 4057
Yuma 08:11:59 -70.9 Dark Down 37.8 202.6 Up 07:56:59 - 08:26:59 4050
Wildwood 08:12:16 -70.0 Dark Down 37.6 197.7 Up 07:57:16 - 08:27:16 4047

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 2018/10/23 20:55:18 UT

Marc W. Buie, Southwest Research Institute

RECON