RECON: TNO occultation with 00KL4

Event between 00KL4 and star GA0820:15218204 with event index number of 2584038

Geocentric closest approach at 2028/07/16 08:38:49 UTC

J2000 position of star is 18:52:57.3 -07:14:40
Equinox of date position of star is 18:54:09.9 -07:12:56
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 38.7 AU from the Sun and 37.7 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 780 seconds.
The 1-sigma cross-track error in the shadow position is 4622 km.
The sky-plane scale is 27348.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=187.9 km assuming a 5% albedo -- 7.7 sec chord
Diameter=76.7 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 00KL4, (2028/07/16 08:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.7 -26:29:34  0.9 39.12 152
Nunki          18:57:02.0 -26:15:31  2.0 19.06 119
Eta Sct        18:58:35.3 -05:48:25  4.8  1.73 114
PPM 202241     18:53:40.5 -07:13:20  8.4  0.20 115
PPM 202261     18:54:43.7 -07:02:05  9.3  0.18 115
00KL4          18:54:29.8 -07:12:27 15.3       115
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 1.2 sigma about the mid-time.
The median site spacing is 21.3 km RECON observability=1.0 and success probability=8.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:37:08 -17.8 AT Up 29.5 203.4 Low 08:22:08 - 08:52:08 2931
Kelowna 08:37:04 -18.5 Dark Up 30.0 204.5 Low 08:22:04 - 08:52:04 2862
Peachland 08:37:05 -18.7 Dark Up 30.1 204.2 Up 08:22:05 - 08:52:05 2860
Summerland 08:37:05 -18.8 Dark Up 30.3 204.4 Up 08:22:05 - 08:52:05 2849
Penticton 08:37:05 -18.8 Dark Up 30.3 204.5 Up 08:22:05 - 08:52:05 2842
Victoria 08:37:15 -20.1 Dark Up 32.2 200.5 Up 08:22:15 - 08:52:15 2840
Oliver 08:37:04 -19.2 Dark Up 30.6 204.6 Up 08:22:04 - 08:52:04 2819
Anarchist Mountain Observatory 08:37:04 -19.3 Dark Up 30.7 204.9 Up 08:22:04 - 08:52:04 2804
Sleaford 08:36:34 -14.3 AT Up 23.7 218.1 Low 08:21:34 - 08:51:34 2786
Tonasket 08:37:04 -19.7 Dark Up 31.0 204.9 Up 08:22:04 - 08:52:04 2784
Okanogan 08:37:04 -20.0 Dark Up 31.4 204.8 Up 08:22:04 - 08:52:04 2764
Brewster 08:37:05 -20.3 Dark Up 31.7 204.6 Up 08:22:05 - 08:52:05 2749
Manson/Chelan 08:37:05 -20.5 Dark Up 32.0 204.3 Up 08:22:05 - 08:52:05 2741
Wenatchee 08:37:06 -21.0 Dark Up 32.4 204.2 Up 08:22:06 - 08:52:06 2711
Ellensburg 08:37:06 -21.4 Dark Up 32.9 204.1 Up 08:22:06 - 08:52:06 2687
Yakima 08:37:06 -21.9 Dark Up 33.2 204.2 Up 08:22:06 - 08:52:06 2658
Toppenish/White Swan 08:37:05 -22.1 Dark Up 33.4 204.4 Up 08:22:05 - 08:52:05 2640
Goldendale 08:37:06 -22.6 Dark Up 34.0 204.1 Up 08:22:06 - 08:52:06 2608
The Dalles 08:37:07 -22.9 Dark Up 34.3 203.7 Up 08:22:07 - 08:52:07 2599
PNWRO 08:37:01 -22.3 Dark Up 33.3 206.2 Up 08:22:01 - 08:52:01 2587
Maupin 08:37:07 -23.3 Dark Up 34.7 204.0 Up 08:22:07 - 08:52:07 2567
Sisters 08:37:07 -24.2 Dark Up 35.6 203.6 Up 08:22:07 - 08:52:07 2512
Bend 08:37:07 -24.4 Dark Up 35.8 204.0 Up 08:22:07 - 08:52:07 2490
Oregon Observatory 08:37:07 -24.6 Dark Up 36.0 203.9 Up 08:22:07 - 08:52:07 2480
North Lake 08:37:05 -25.2 Dark Up 36.4 204.7 Up 08:22:05 - 08:52:05 2422
Chiloquin 08:37:08 -26.0 Dark Up 37.3 203.8 Up 08:22:08 - 08:52:08 2389
Klamath Falls 08:37:08 -26.3 Dark Up 37.6 204.0 Up 08:22:08 - 08:52:08 2361
Lakeview 08:37:03 -26.2 Dark Up 37.2 205.7 Up 08:22:03 - 08:52:03 2331
Cedarville 08:37:02 -26.8 Dark Up 37.7 206.1 Up 08:22:02 - 08:52:02 2277
Fall River/Burney 08:37:06 -27.4 Dark Up 38.5 204.8 Up 08:22:06 - 08:52:06 2263
Susanville 08:37:04 -28.0 Dark Up 38.9 205.9 Up 08:22:04 - 08:52:04 2200
Greenville 08:37:04 -28.3 Dark Up 39.2 205.7 Up 08:22:04 - 08:52:04 2184
Gimple 08:37:04 -28.3 Dark Up 39.2 205.8 Up 08:22:04 - 08:52:04 2182
Quincy 08:37:04 -28.5 Dark Up 39.4 205.8 Up 08:22:04 - 08:52:04 2167
Portola 08:37:03 -28.6 Dark Up 39.4 206.4 Up 08:22:03 - 08:52:03 2148
Reno 08:37:00 -28.8 Dark Up 39.4 207.2 Up 08:22:00 - 08:52:00 2114
Carson City 08:37:00 -29.1 Dark Up 39.7 207.4 Up 08:22:00 - 08:52:00 2085
Gardnerville 08:37:00 -29.4 Dark Up 39.9 207.6 Up 08:22:00 - 08:52:00 2064
Yerington 08:36:58 -29.2 Dark Up 39.6 208.2 Up 08:21:58 - 08:51:58 2056
Hawthorne 08:36:56 -29.6 Dark Up 39.8 209.0 Up 08:21:56 - 08:51:56 2008
Lee Vining 08:36:58 -30.2 Dark Up 40.5 208.7 Up 08:21:58 - 08:51:58 1972
Tonopah 08:36:52 -29.9 Dark Up 39.7 210.9 Up 08:21:52 - 08:51:52 1940
Bishop 08:36:55 -30.7 Dark Up 40.8 209.8 Up 08:21:55 - 08:51:55 1907
Dunrhomin 08:36:17 -25.1 Dark Up 32.4 222.9 Up 08:21:17 - 08:51:17 1876
CU-SBO 08:36:18 -25.3 Dark Up 32.6 222.9 Up 08:21:18 - 08:51:18 1858
Beatty 08:36:50 -30.9 Dark Up 40.5 211.9 Up 08:21:50 - 08:51:50 1834
Indian Springs 08:36:46 -31.1 Dark Up 40.3 213.3 Up 08:21:46 - 08:51:46 1784
Henderson 08:36:44 -31.5 Dark Up 40.4 214.4 Up 08:21:44 - 08:51:44 1723
Patrick 08:36:40 -31.9 Dark Up 40.4 216.0 Up 08:21:40 - 08:51:40 1646
Laughlin/Bullhead City 08:36:42 -32.2 Dark Up 41.0 215.3 Up 08:21:42 - 08:51:42 1639
Wildwood 08:36:55 -34.0 Dark Up 43.7 211.1 Up 08:21:55 - 08:51:55 1633
Kingman/Dolan Springs 08:36:40 -32.1 Dark Up 40.7 215.9 Up 08:21:40 - 08:51:40 1630
Mohave Valley 08:36:42 -32.5 Dark Up 41.2 215.4 Up 08:21:42 - 08:51:42 1615
Lake Havasu City 08:36:41 -32.8 Dark Up 41.4 215.9 Up 08:21:41 - 08:51:41 1575
Idyllwild 08:36:49 -34.0 Dark Up 43.1 213.5 Up 08:21:49 - 08:51:49 1561
Parker 08:36:41 -33.2 Dark Up 41.7 216.1 Up 08:21:41 - 08:51:41 1544
Calipatria 08:36:44 -34.4 Dark Up 43.1 215.2 Up 08:21:44 - 08:51:44 1481
George/Scottsdale 08:36:32 -33.0 Dark Up 40.8 219.1 Up 08:21:32 - 08:51:32 1453
Yuma 08:36:41 -34.6 Dark Up 43.0 216.5 Up 08:21:41 - 08:51:41 1423

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 00KL4, (2028/07/16 08:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 39.12 152
Nunki          18:55:15.9 -26:17:49  2.0 19.06 119
Eta Sct        18:57:03.8 -05:50:48  4.8  1.73 114
PPM 202241     18:52:08.0 -07:15:31  8.4  0.20 115
PPM 202261     18:53:11.3 -07:04:19  9.3  0.18 115
00KL4          18:52:57.3 -07:14:40 15.3       115
Positions are for J2000

Event circumstances last updated at 2022/05/27 23:05:26 UT

Marc W. Buie, Southwest Research Institute

RECON