RECON: TNO occultation with 00KL4

Event between 00KL4 and star GA0840:08254224 with event index number of 2581240

Geocentric closest approach at 2023/07/25 06:35:24 UTC

J2000 position of star is 18:22:17.4 -05:57:14
Equinox of date position of star is 18:23:32.3 -05:56:27
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 72 degrees from the moon. Moon is 44% illuminated.
Apparent brightness V=23.5

[RECON map]
Object is 39.0 AU from the Sun and 38.1 AU from the Earth.
Apparent velocity is 22.2 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 401 seconds.
The 1-sigma cross-track error in the shadow position is 2851 km.
The sky-plane scale is 27638.5 km/arcsec.

The object has an absolute magnitude Hv=7.5
Diameter=187.9 km assuming a 5% albedo -- 8.5 sec chord
Diameter=76.7 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 00KL4, (2023/07/25 06:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.4 -26:28:56  0.9 33.80  45
60Bet Oph      17:44:38.3 +04:33:33  2.8 14.30  64
PPM 201730     18:25:58.7 -07:03:42  6.5  1.27  72
PPM 201709     18:24:50.8 -06:14:14  8.4  0.44  72
PPM 201671     18:23:23.5 -06:00:45  9.5  0.08  72
00KL4          18:23:33.2 -05:56:27 16.8        72
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 2.2 sigma about the mid-time.
The median site spacing is 20.2 km RECON observability=1.0 and success probability=13.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:34:06 -16.7 AT Up 33.2 186.3 Up 06:19:06 - 06:49:06 2856
Kelowna 06:34:04 -17.6 AT Up 33.9 187.4 Up 06:19:04 - 06:49:04 2789
Peachland 06:34:05 -17.7 AT Up 34.1 187.1 Up 06:19:05 - 06:49:05 2788
Victoria 06:34:17 -17.8 AT Up 35.5 182.8 Up 06:19:17 - 06:49:17 2781
Summerland 06:34:05 -17.8 AT Up 34.2 187.2 Up 06:19:05 - 06:49:05 2776
Penticton 06:34:04 -17.9 AT Up 34.3 187.4 Up 06:19:04 - 06:49:04 2770
Oliver 06:34:04 -18.2 Dark Up 34.6 187.4 Up 06:19:04 - 06:49:04 2748
Anarchist Mountain Observatory 06:34:03 -18.4 Dark Up 34.8 187.6 Up 06:19:03 - 06:49:03 2733
Okanogan 06:34:05 -19.0 Dark Up 35.4 187.4 Up 06:19:05 - 06:49:05 2696
Brewster 06:34:06 -19.2 Dark Up 35.7 187.2 Up 06:19:06 - 06:49:06 2682
Manson/Chelan 06:34:07 -19.3 Dark Up 35.9 186.8 Up 06:19:07 - 06:49:07 2676
Sleaford 06:33:25 -17.8 AT Down 29.6 202.5 Low 06:18:25 - 06:48:25 2669
Wenatchee 06:34:08 -19.7 Dark Up 36.4 186.6 Up 06:19:08 - 06:49:08 2648
Ellensburg 06:34:09 -20.0 Dark Up 36.9 186.4 Up 06:19:09 - 06:49:09 2625
Yakima 06:34:09 -20.4 Dark Up 37.3 186.4 Up 06:19:09 - 06:49:09 2598
Toppenish/White Swan 06:34:09 -20.6 Dark Up 37.5 186.6 Up 06:19:09 - 06:49:09 2580
The Dalles 06:34:12 -21.1 Dark Up 38.3 185.7 Up 06:19:12 - 06:49:12 2544
PNWRO 06:34:04 -21.3 Dark Up 37.7 188.5 Up 06:19:04 - 06:49:04 2524
Maupin 06:34:12 -21.5 Dark Up 38.7 185.9 Up 06:19:12 - 06:49:12 2513
Sisters 06:34:14 -22.2 Dark Up 39.6 185.3 Up 06:19:14 - 06:49:14 2463
Bend 06:34:13 -22.4 Dark Up 39.8 185.7 Up 06:19:13 - 06:49:13 2440
Oregon Observatory 06:34:14 -22.6 Dark Up 40.0 185.5 Up 06:19:14 - 06:49:14 2431
Chiloquin 06:34:16 -23.6 Dark Up 41.4 185.1 Up 06:19:16 - 06:49:16 2346
Klamath Falls 06:34:16 -24.0 Dark Up 41.7 185.2 Up 06:19:16 - 06:49:16 2319
Cedarville 06:34:10 -25.1 Dark Up 42.2 187.4 Up 06:19:10 - 06:49:10 2233
Fall River/Burney 06:34:16 -25.2 Dark Up 42.8 185.9 Up 06:19:16 - 06:49:16 2224
Greenville 06:34:14 -26.1 Dark Up 43.7 186.5 Up 06:19:14 - 06:49:14 2146
Gimple 06:34:14 -26.1 Dark Up 43.7 186.7 Up 06:19:14 - 06:49:14 2144
Quincy 06:34:14 -26.3 Dark Up 43.9 186.6 Up 06:19:14 - 06:49:14 2130
Portola 06:34:13 -26.6 Dark Up 44.0 187.2 Up 06:19:13 - 06:49:13 2110
Reno 06:34:10 -27.0 Dark Up 44.2 188.2 Up 06:19:10 - 06:49:10 2075
Carson City 06:34:11 -27.3 Dark Up 44.5 188.2 Up 06:19:11 - 06:49:11 2046
Gardnerville 06:34:10 -27.6 Dark Up 44.8 188.3 Up 06:19:10 - 06:49:10 2026
Yerington 06:34:08 -27.7 Dark Up 44.7 189.1 Up 06:19:08 - 06:49:08 2016
Hawthorne 06:34:06 -28.3 Dark Up 45.0 189.9 Up 06:19:06 - 06:49:06 1968
Lee Vining 06:34:09 -28.7 Dark Up 45.7 189.4 Up 06:19:09 - 06:49:09 1935
Bishop 06:34:06 -29.5 Dark Up 46.2 190.5 Up 06:19:06 - 06:49:06 1870
Beatty 06:34:00 -30.4 Dark Up 46.3 192.9 Up 06:19:00 - 06:49:00 1793
Dunrhomin 06:33:18 -29.5 Dark Down 40.2 206.9 Up 06:18:18 - 06:48:18 1787
Nikitin 06:33:18 -29.7 Dark Down 40.3 206.9 Up 06:18:18 - 06:48:18 1773
CU-SBO 06:33:19 -29.8 Dark Down 40.4 206.8 Up 06:18:19 - 06:48:19 1769
Wildwood 06:34:09 -32.4 Dark Up 49.4 190.9 Up 06:19:09 - 06:49:09 1606
Patrick 06:33:51 -32.6 Dark Down 47.2 197.3 Up 06:18:51 - 06:48:51 1599
Laughlin/Bullhead City 06:33:53 -32.6 Dark Down 47.6 196.4 Up 06:18:53 - 06:48:53 1596
Lake Havasu City 06:33:53 -33.3 Dark Down 48.2 197.0 Up 06:18:53 - 06:48:53 1532
Idyllwild 06:34:02 -33.3 Dark Up 49.4 193.7 Up 06:19:02 - 06:49:02 1529
Calipatria 06:33:58 -34.3 Dark Up 49.8 195.7 Up 06:18:58 - 06:48:58 1446
George/Scottsdale 06:33:43 -34.7 Dark Down 48.3 200.8 Up 06:18:43 - 06:48:43 1404
Yuma 06:33:55 -34.9 Dark Up 50.0 197.2 Up 06:18:55 - 06:48:55 1386

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, (2023/07/25 06:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 33.80  45
60Bet Oph      17:43:28.3 +04:34:06  2.8 14.30  64
PPM 201730     18:24:42.3 -07:04:34  6.5  1.27  72
PPM 201709     18:23:34.9 -06:15:04  8.4  0.44  72
PPM 201671     18:22:07.7 -06:01:32  9.5  0.08  72
00KL4          18:22:17.4 -05:57:14 16.8        72
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:30:29 UT

Marc W. Buie, Southwest Research Institute

RECON