RECON: TNO occultation with 09JZ18

Event between 09JZ18 and star GA0740:05165577 with event index number of 1428360

Geocentric closest approach at 2025/06/02 07:34:57 UTC

J2000 position of star is 14:19:49.5 -14:39:54
Equinox of date position of star is 14:20:55.8 -14:45:26
Stellar brightness G=14.2, use SENSEUP=64
Star is 65 degrees from the moon. Moon is 42% illuminated.
TNO apparent brightness V=24.8

[RECON map]
TNO is 29.6 AU from the Sun and 28.8 AU from the Earth.
The TNO is moving 19.0 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 225 seconds.
The 1-sigma cross-track error in the shadow position is 4053 km.
The sky-plane scale is 20856.7 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=169.0 km assuming a 5% albedo -- 3.2 sec chord
Diameter=69.0 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 09JZ18, (2025/06/02 07:35UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:32.2 -11:17:35  1.0 13.76  52
PPM 228402     14:12:14.1 -16:25:16  4.2  2.71  64
PPM 228613     14:20:28.2 -14:38:43  8.5  0.23  65
09JZ18         14:21:12.8 -14:46:51 14.2        66
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 4.0 sigma about the mid-time.
The median site spacing is 13.0 km RECON observability=1.0 and success probability=5.1%
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 07:34:14 -17.4 AT Up 19.8 211.3 Really Low 07:19:14 - 07:49:14 4514
Kelowna 07:34:14 -17.7 AT Up 20.2 211.2 Low 07:19:14 - 07:49:14 4497
Peachland 07:34:14 -17.8 AT Up 20.4 210.9 Low 07:19:14 - 07:49:14 4492
Summerland 07:34:13 -18.0 AT Up 20.5 211.1 Low 07:19:13 - 07:49:13 4486
Penticton 07:34:12 -18.1 Dark Up 20.5 211.2 Low 07:19:12 - 07:49:12 4484
Oliver 07:34:12 -18.4 Dark Up 20.8 211.2 Low 07:19:12 - 07:49:12 4469
Anarchist Mountain Observatory 07:34:11 -18.6 Dark Up 20.9 211.5 Low 07:19:11 - 07:49:11 4463
Tonasket 07:34:10 -18.9 Dark Up 21.2 211.4 Low 07:19:10 - 07:49:10 4449
Okanogan 07:34:09 -19.2 Dark Up 21.5 211.4 Low 07:19:09 - 07:49:09 4434
Victoria 07:34:23 -18.8 Dark Up 22.6 207.6 Low 07:19:23 - 07:49:23 4422
Brewster 07:34:09 -19.5 Dark Up 21.8 211.2 Low 07:19:09 - 07:49:09 4421
Manson/Chelan 07:34:10 -19.7 Dark Up 22.2 210.9 Low 07:19:10 - 07:49:10 4411
Entiat 07:34:09 -19.9 Dark Up 22.4 210.9 Low 07:19:09 - 07:49:09 4400
Wenatchee 07:34:10 -20.1 Dark Up 22.6 210.8 Low 07:19:10 - 07:49:10 4389
Ellensburg 07:34:09 -20.5 Dark Up 23.1 210.7 Low 07:19:09 - 07:49:09 4369
Yakima 07:34:09 -20.9 Dark Up 23.4 210.8 Low 07:19:09 - 07:49:09 4350
Toppenish/White Swan 07:34:08 -21.2 Dark Up 23.5 211.0 Low 07:19:08 - 07:49:08 4341
Pasco 07:34:02 -21.4 Dark Up 23.2 212.2 Low 07:19:02 - 07:49:02 4340
PNWRO 07:34:01 -21.6 Dark Up 23.3 212.5 Low 07:19:01 - 07:49:01 4330
Goldendale 07:34:08 -21.7 Dark Up 24.2 210.7 Low 07:19:08 - 07:49:08 4313
The Dalles 07:34:08 -21.9 Dark Up 24.5 210.4 Low 07:19:08 - 07:49:08 4300
Maupin 07:34:06 -22.3 Dark Up 24.8 210.6 Low 07:19:06 - 07:49:06 4280
Redmond 07:34:05 -23.2 Dark Up 25.6 210.7 Low 07:19:05 - 07:49:05 4235
Sisters 07:34:07 -23.1 Dark Up 25.7 210.3 Low 07:19:07 - 07:49:07 4234
Bend 07:34:05 -23.4 Dark Up 25.9 210.6 Low 07:19:05 - 07:49:05 4223
Oregon Observatory 07:34:05 -23.5 Dark Up 26.1 210.5 Low 07:19:05 - 07:49:05 4214
La Pine/Gilchrist 07:34:04 -23.7 Dark Up 26.3 210.5 Low 07:19:04 - 07:49:04 4203
North Lake 07:34:01 -24.2 Dark Up 26.4 211.2 Low 07:19:01 - 07:49:01 4184
Paisley 07:33:59 -24.8 Dark Up 26.7 211.7 Low 07:18:59 - 07:48:59 4156
Lakeview 07:33:56 -25.3 Dark Up 27.1 212.0 Low 07:18:56 - 07:48:56 4130
Klamath Falls 07:34:02 -25.1 Dark Up 27.6 210.6 Low 07:19:02 - 07:49:02 4125
Cedarville 07:33:54 -26.0 Dark Up 27.6 212.4 Low 07:18:54 - 07:48:54 4095
Fall River/Burney 07:33:57 -26.3 Dark Up 28.5 211.3 Low 07:18:57 - 07:48:57 4062
Niwot 07:32:57 -27.1 Dark Down 21.6 226.4 Low 07:17:57 - 07:47:57 4041
SwRI 07:32:57 -27.3 Dark Down 21.7 226.4 Low 07:17:57 - 07:47:57 4035
Susanville 07:33:54 -27.0 Dark Up 28.7 212.2 Low 07:18:54 - 07:48:54 4030
Gimple 07:33:54 -27.3 Dark Up 29.1 212.1 Low 07:18:54 - 07:48:54 4013
Greenville 07:33:54 -27.3 Dark Up 29.1 212.0 Low 07:18:54 - 07:48:54 4013
Quincy 07:33:53 -27.5 Dark Up 29.3 212.1 Low 07:18:53 - 07:48:53 4001
Portola 07:33:51 -27.7 Dark Up 29.2 212.6 Low 07:18:51 - 07:48:51 3997
Reno 07:33:48 -28.0 Dark Up 29.1 213.3 Low 07:18:48 - 07:48:48 3984
Carson City 07:33:47 -28.3 Dark Up 29.4 213.4 Low 07:18:47 - 07:48:47 3963
Yerington 07:33:44 -28.6 Dark Up 29.3 214.1 Low 07:18:44 - 07:48:44 3955
Gardnerville 07:33:46 -28.6 Dark Up 29.6 213.5 Low 07:18:46 - 07:48:46 3949
Hawthorne 07:33:41 -29.1 Dark Up 29.5 214.8 Low 07:18:41 - 07:48:41 3930
Tonopah 07:33:34 -29.6 Dark Up 29.2 216.3 Low 07:18:34 - 07:48:34 3908
Lee Vining 07:33:41 -29.6 Dark Up 30.2 214.4 Up 07:18:41 - 07:48:41 3894
Bishop 07:33:37 -30.3 Dark Up 30.3 215.4 Up 07:18:37 - 07:48:37 3860
Beatty 07:33:29 -30.8 Dark Up 29.9 217.1 Low 07:18:29 - 07:48:29 3838
Indian Springs 07:33:24 -31.2 Dark Up 29.7 218.2 Low 07:18:24 - 07:48:24 3821
Henderson 07:33:20 -31.7 Dark Up 29.8 219.0 Low 07:18:20 - 07:48:20 3789
Searchlight/Boulder City 07:33:18 -32.3 Dark Up 30.2 219.3 Up 07:18:18 - 07:48:18 3753
Patrick 07:33:14 -32.4 Dark Up 29.7 220.3 Low 07:18:14 - 07:48:14 3752
Kingman/Dolan Springs 07:33:14 -32.6 Dark Up 29.9 220.2 Low 07:18:14 - 07:48:14 3737
DCO 07:33:11 -32.7 Dark Up 29.5 221.1 Low 07:18:11 - 07:48:11 3734
Laughlin/Bullhead City 07:33:16 -32.6 Dark Up 30.2 219.7 Up 07:18:16 - 07:48:16 3734
CPSLO 07:33:41 -32.1 Dark Up 33.0 213.8 Up 07:18:41 - 07:48:41 3717
Mohave Valley 07:33:16 -32.9 Dark Up 30.4 219.8 Up 07:18:16 - 07:48:16 3716
Lake Havasu City 07:33:13 -33.3 Dark Up 30.6 220.2 Up 07:18:13 - 07:48:13 3690
Parker 07:33:12 -33.6 Dark Up 30.9 220.4 Up 07:18:12 - 07:48:12 3667
Wildwood 07:33:29 -33.5 Dark Up 33.1 216.3 Up 07:18:29 - 07:48:29 3648
George/Scottsdale 07:33:01 -34.0 Dark Up 29.9 222.8 Low 07:18:01 - 07:48:01 3644
Idyllwild 07:33:21 -34.0 Dark Up 32.4 218.3 Up 07:18:21 - 07:48:21 3633
Blythe 07:33:12 -34.1 Dark Up 31.4 220.3 Up 07:18:12 - 07:48:12 3631
Calipatria 07:33:15 -34.6 Dark Up 32.3 219.6 Up 07:18:15 - 07:48:15 3594
Yuma 07:33:10 -35.1 Dark Up 32.2 220.6 Up 07:18:10 - 07:48:10 3568

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 09JZ18, (2025/06/02 07:35UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 13.76  52
PPM 228402     14:10:50.5 -16:18:08  4.2  2.71  64
PPM 228613     14:19:05.0 -14:31:45  8.5  0.23  65
09JZ18         14:19:49.5 -14:39:54 14.2        65
Positions are for J2000

Event circumstances last updated at 2020/03/28 21:19:03 UT

Marc W. Buie, Southwest Research Institute

RECON