RECON: TNO occultation with 04KF19

Event between 04KF19 and star GA0660:07717071 with event index number of 2008347

Geocentric closest approach at 2021/06/23 08:13:45 UTC

J2000 position of star is 16:41:51.7 -22:20:00
Equinox of date position of star is 16:43:08.5 -22:22:22
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 0 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 41.3 AU from the Sun and 40.4 AU from the Earth.
The TNO is moving 22.8 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 474 seconds.
The 1-sigma cross-track error in the shadow position is 2708 km.
The sky-plane scale is 29291.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=227.0 km assuming a 5% albedo -- 10.0 sec chord
Diameter=92.7 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 04KF19, (2021/06/23 08:14UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.7 -26:28:40  0.9  4.98   5
23Tau Sco      16:37:13.4 -28:15:31  2.8  6.04   6
PPM 232040     16:43:09.6 -19:57:50  5.8  2.41   2
PPM 265858     16:44:57.1 -22:46:31  7.9  0.58   1
PPM 265820     16:43:37.9 -22:35:23  9.4  0.24   0
04KF19         16:43:08.9 -22:22:23 16.9         0
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 1.9 sigma about the mid-time.
The median site spacing is 15.2 km RECON observability=0.7 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)
Clarence Fulton 08:13:04 -16.3 AT Up 14.1 204.0 Really Low 07:58:04 - 08:28:04 5012
Kelowna 08:13:04 -16.7 AT Up 14.5 203.9 Really Low 07:58:04 - 08:28:04 5000
Peachland 08:13:05 -16.8 AT Up 14.6 203.6 Really Low 07:58:05 - 08:28:05 4997
Summerland 08:13:04 -16.9 AT Up 14.7 203.7 Really Low 07:58:04 - 08:28:04 4992
Penticton 08:13:04 -17.0 AT Up 14.8 203.8 Really Low 07:58:04 - 08:28:04 4990
Oliver 08:13:03 -17.3 AT Up 15.1 203.9 Really Low 07:58:03 - 08:28:03 4978
Anarchist Mountain Observatory 08:13:03 -17.5 AT Up 15.2 204.0 Really Low 07:58:03 - 08:28:03 4973
Victoria 08:13:14 -18.1 Dark Up 16.7 200.4 Really Low 07:58:14 - 08:28:14 4962
Tonasket 08:13:02 -17.8 AT Up 15.5 204.0 Really Low 07:58:02 - 08:28:02 4962
Okanogan 08:13:02 -18.2 Dark Up 15.9 203.9 Really Low 07:58:02 - 08:28:02 4950
Brewster 08:13:02 -18.4 Dark Up 16.2 203.8 Really Low 07:58:02 - 08:28:02 4941
Manson/Chelan 08:13:03 -18.7 Dark Up 16.5 203.4 Really Low 07:58:03 - 08:28:03 4935
Wenatchee 08:13:02 -19.1 Dark Up 16.9 203.3 Really Low 07:58:02 - 08:28:02 4918
Ellensburg 08:13:02 -19.6 Dark Up 17.4 203.2 Really Low 07:58:02 - 08:28:02 4904
Yakima 08:13:02 -20.0 Dark Up 17.8 203.2 Really Low 07:58:02 - 08:28:02 4889
Toppenish/White Swan 08:13:01 -20.2 Dark Up 17.9 203.4 Really Low 07:58:01 - 08:28:01 4880
Pasco 08:12:57 -20.3 Dark Up 17.7 204.6 Really Low 07:57:57 - 08:27:57 4872
PNWRO 08:12:56 -20.5 Dark Up 17.8 204.8 Really Low 07:57:56 - 08:27:56 4862
Goldendale 08:13:02 -20.7 Dark Up 18.5 203.1 Really Low 07:58:02 - 08:28:02 4860
The Dalles 08:13:02 -21.0 Dark Up 18.8 202.8 Really Low 07:58:02 - 08:28:02 4851
Maupin 08:13:01 -21.4 Dark Up 19.2 202.9 Really Low 07:58:01 - 08:28:01 4835
Sisters 08:13:02 -22.3 Dark Up 20.1 202.6 Low 07:58:02 - 08:28:02 4800
Redmond 08:13:00 -22.3 Dark Up 20.1 203.0 Low 07:58:00 - 08:28:00 4798
Bend 08:13:00 -22.5 Dark Up 20.3 202.9 Low 07:58:00 - 08:28:00 4789
Oregon Observatory 08:13:00 -22.7 Dark Up 20.5 202.8 Low 07:58:00 - 08:28:00 4782
La Pine/Gilchrist 08:13:01 -22.9 Dark Up 20.7 202.7 Low 07:58:01 - 08:28:01 4774
North Lake 08:12:58 -23.3 Dark Up 20.9 203.4 Low 07:57:58 - 08:27:58 4754
Paisley 08:12:56 -23.9 Dark Up 21.3 203.8 Low 07:57:56 - 08:27:56 4728
Chiloquin 08:13:00 -24.0 Dark Up 21.8 202.6 Low 07:58:00 - 08:28:00 4725
Klamath Falls 08:12:59 -24.3 Dark Up 22.1 202.7 Low 07:57:59 - 08:27:59 4710
Lakeview 08:12:54 -24.4 Dark Up 21.7 204.0 Low 07:57:54 - 08:27:54 4705
Cedarville 08:12:52 -25.0 Dark Up 22.3 204.3 Low 07:57:52 - 08:27:52 4674
Fall River/Burney 08:12:56 -25.5 Dark Up 23.1 203.2 Low 07:57:56 - 08:27:56 4654
Susanville 08:12:53 -26.1 Dark Up 23.4 204.0 Low 07:57:53 - 08:27:53 4622
Greenville 08:12:53 -26.4 Dark Up 23.8 203.8 Low 07:57:53 - 08:27:53 4609
Gimple 08:12:53 -26.4 Dark Up 23.8 203.9 Low 07:57:53 - 08:27:53 4609
Quincy 08:12:53 -26.6 Dark Up 24.0 203.8 Low 07:57:53 - 08:27:53 4599
Portola 08:12:51 -26.7 Dark Up 23.9 204.3 Low 07:57:51 - 08:27:51 4592
Reno 08:12:47 -27.0 Dark Up 24.0 205.0 Low 07:57:47 - 08:27:47 4577
Carson City 08:12:47 -27.3 Dark Up 24.3 205.1 Low 07:57:47 - 08:27:47 4558
Yerington 08:12:44 -27.5 Dark Up 24.3 205.7 Low 07:57:44 - 08:27:44 4546
Gardnerville 08:12:47 -27.6 Dark Up 24.5 205.1 Low 07:57:47 - 08:27:47 4546
Hawthorne 08:12:42 -27.9 Dark Up 24.5 206.3 Low 07:57:42 - 08:27:42 4520
Dunrhomin 08:12:03 -24.3 Dark Up 17.6 217.7 Really Low 07:57:03 - 08:27:03 4508
Lee Vining 08:12:44 -28.5 Dark Up 25.2 205.9 Low 07:57:44 - 08:27:44 4493
Tonopah 08:12:37 -28.3 Dark Up 24.4 207.7 Low 07:57:37 - 08:27:37 4490
Bishop 08:12:40 -29.1 Dark Up 25.5 206.7 Low 07:57:40 - 08:27:40 4458
Beatty 08:12:34 -29.4 Dark Up 25.3 208.3 Low 07:57:34 - 08:27:34 4425
Indian Springs 08:12:30 -29.7 Dark Up 25.2 209.4 Low 07:57:30 - 08:27:30 4401
Henderson 08:12:26 -30.1 Dark Up 25.4 210.1 Low 07:57:26 - 08:27:26 4367
CPSLO 08:12:45 -31.2 Dark Up 28.1 205.0 Low 07:57:45 - 08:27:45 4349
Patrick 08:12:21 -30.6 Dark Up 25.4 211.3 Low 07:57:21 - 08:27:21 4324
Laughlin/Bullhead City 08:12:23 -30.9 Dark Up 25.9 210.7 Low 07:57:23 - 08:27:23 4314
Kingman/Dolan Springs 08:12:22 -30.8 Dark Up 25.7 211.2 Low 07:57:22 - 08:27:22 4313
Mohave Valley 08:12:23 -31.2 Dark Up 26.2 210.8 Low 07:57:23 - 08:27:23 4298
Lake Havasu City 08:12:21 -31.6 Dark Up 26.4 211.1 Low 07:57:21 - 08:27:21 4273
Wildwood 08:12:35 -32.4 Dark Up 28.5 207.3 Low 07:57:35 - 08:27:35 4272
Parker 08:12:20 -31.9 Dark Up 26.7 211.2 Low 07:57:20 - 08:27:20 4252
Idyllwild 08:12:29 -32.6 Dark Up 28.1 209.1 Low 07:57:29 - 08:27:29 4243
Blythe 08:12:21 -32.5 Dark Up 27.3 211.1 Low 07:57:21 - 08:27:21 4222
George/Scottsdale 08:12:11 -32.0 Dark Up 26.0 213.5 Low 07:57:11 - 08:27:11 4209
Calipatria 08:12:23 -33.1 Dark Up 28.1 210.4 Low 07:57:23 - 08:27:23 4198
Yuma 08:12:19 -33.4 Dark Up 28.1 211.3 Low 07:57:19 - 08:27:19 4166

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 04KF19, (2021/06/23 08:14UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  4.98   5
23Tau Sco      16:35:52.9 -28:12:58  2.8  6.04   6
PPM 232040     16:41:53.8 -19:55:27  5.8  2.41   2
PPM 265858     16:43:39.7 -22:44:12  7.9  0.58   1
PPM 265820     16:42:20.6 -22:33:01  9.4  0.24   0
04KF19         16:41:51.7 -22:20:00 16.9         0
Positions are for J2000

Event circumstances last updated at 2021/05/17 01:03:43 UT

Marc W. Buie, Southwest Research Institute

RECON