RECON: TNO occultation with 87269

Event between (87269) 00OO67 and star GA0900:00405262 with event index number of 1777156

Geocentric closest approach at 2021/09/15 10:13:14 UTC

J2000 position of star is 04:25:41.0 +01:26:13
Equinox of date position of star is 04:26:48.2 +01:29:06
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 136 degrees from the moon. Moon is 67% illuminated.
TNO apparent brightness V=24.1

[RECON map]
TNO is 29.8 AU from the Sun and 29.5 AU from the Earth.
The TNO is moving 9.6 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 226 seconds.
The 1-sigma cross-track error in the shadow position is 2748 km.
The sky-plane scale is 21389.8 km/arcsec.

The TNO has an absolute magnitude Hv=9.2
Diameter=87.1 km assuming a 5% albedo -- 9.0 sec chord
Diameter=35.6 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 

Star training set for 87269, (2021/09/15 10:13UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.1 +16:33:04  0.8 15.28 146
67Bet Eri      05:08:55.1 -05:03:36  2.8 12.39 139
PPM 147584     04:29:39.5 +01:25:38  5.5  0.72 136
PPM 147539     04:27:03.4 +01:04:47  7.5  0.41 136
PPM 147538     04:27:01.2 +01:09:49  9.5  0.33 136
PPM 147548     04:27:33.5 +01:43:34 10.3  0.31 136
87269          04:26:48.4 +01:29:06 15.1       136
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 5.3 km RECON observability=1.0 and success probability=10.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
CPSLO 10:08:06 -41.1 Dark Down 39.4 122.9 Up 09:53:06 - 10:23:06 -1505
Quincy 10:07:21 -38.1 Dark Down 36.5 125.4 Up 09:52:21 - 10:22:21 -1605
Fall River/Burney 10:07:09 -37.5 Dark Down 35.6 125.6 Up 09:52:09 - 10:22:09 -1610
Greenville 10:07:18 -37.9 Dark Down 36.4 125.5 Up 09:52:18 - 10:22:18 -1610
Gimple 10:07:18 -37.9 Dark Down 36.5 125.6 Up 09:52:18 - 10:22:18 -1616
Wildwood 10:08:14 -40.7 Dark Down 41.5 124.0 Up 09:53:14 - 10:23:14 -1622
Klamath Falls 10:06:59 -36.8 Dark Down 34.6 125.8 Up 09:51:59 - 10:21:59 -1624
Chiloquin 10:06:57 -36.6 Dark Down 34.4 125.9 Up 09:51:57 - 10:21:57 -1630
Portola 10:07:21 -37.9 Dark Down 36.9 125.8 Up 09:52:21 - 10:22:21 -1632
Susanville 10:07:15 -37.6 Dark Down 36.4 126.0 Up 09:52:15 - 10:22:15 -1637
Gardnerville 10:07:29 -38.1 Dark Down 37.9 126.0 Up 09:52:29 - 10:22:29 -1654
Carson City 10:07:28 -38.0 Dark Down 37.7 126.1 Up 09:52:28 - 10:22:28 -1658
Reno 10:07:22 -37.8 Dark Down 37.5 126.3 Up 09:52:22 - 10:22:22 -1666
Lee Vining 10:07:36 -38.5 Dark Down 38.9 126.0 Up 09:52:36 - 10:22:36 -1670
La Pine/Gilchrist 10:06:46 -35.6 Dark Down 33.9 126.8 Up 09:51:46 - 10:21:46 -1689
Yerington 10:07:26 -37.8 Dark Down 38.2 126.6 Up 09:52:26 - 10:22:26 -1694
Oregon Observatory 10:06:43 -35.4 Dark Down 33.8 127.0 Up 09:51:43 - 10:21:43 -1699
Cedarville 10:07:06 -36.5 Dark Down 36.0 127.0 Up 09:52:06 - 10:22:06 -1700
Bishop 10:07:42 -38.5 Dark Down 39.7 126.4 Up 09:52:42 - 10:22:42 -1705
Sisters 10:06:39 -35.2 Dark Down 33.5 127.1 Up 09:51:39 - 10:21:39 -1706
Lakeview 10:06:57 -36.1 Dark Down 35.5 127.2 Up 09:51:57 - 10:21:57 -1710
North Lake 10:06:49 -35.6 Dark Down 34.5 127.2 Up 09:51:49 - 10:21:49 -1710
Bend 10:06:42 -35.2 Dark Down 33.8 127.2 Up 09:51:42 - 10:21:42 -1713
Paisley 10:06:53 -35.9 Dark Down 35.1 127.3 Up 09:51:53 - 10:21:53 -1714
Hawthorne 10:07:30 -37.8 Dark Down 38.8 126.8 Up 09:52:30 - 10:22:30 -1717
Redmond 10:06:40 -35.0 Dark Down 33.7 127.5 Up 09:51:40 - 10:21:40 -1729
Idyllwild 10:08:15 -39.7 Dark Down 43.0 125.6 Up 09:53:15 - 10:23:15 -1751
Maupin 10:06:31 -34.3 Dark Down 33.2 128.0 Up 09:51:31 - 10:21:31 -1766
Victoria 10:06:04 -32.6 Dark Down 29.8 127.2 Low 09:51:04 - 10:21:04 -1768
The Dalles 10:06:27 -34.0 Dark Down 32.9 128.1 Up 09:51:27 - 10:21:27 -1776
Tonopah 10:07:32 -37.3 Dark Down 40.0 128.0 Up 09:52:32 - 10:22:32 -1802
Goldendale 10:06:26 -33.7 Dark Down 32.9 128.6 Up 09:51:26 - 10:21:26 -1804
Beatty 10:07:43 -37.8 Dark Down 41.0 127.7 Up 09:52:43 - 10:22:43 -1808
Calipatria 10:08:20 -39.3 Dark Down 44.2 126.4 Up 09:53:20 - 10:23:20 -1829
Yakima 10:06:20 -33.0 Dark Down 32.6 129.2 Up 09:51:20 - 10:21:20 -1847
Toppenish/White Swan 10:06:21 -33.1 Dark Down 32.8 129.2 Up 09:51:21 - 10:21:21 -1849
Ellensburg 10:06:13 -32.7 Dark Down 32.3 129.4 Up 09:51:13 - 10:21:13 -1864
Indian Springs 10:07:46 -37.4 Dark Down 41.9 128.6 Up 09:52:46 - 10:22:46 -1878
Yuma 10:08:23 -39.0 Dark Down 45.1 127.0 Up 09:53:23 - 10:23:23 -1890
Wenatchee 10:06:10 -32.3 Dark Down 32.1 129.8 Up 09:51:10 - 10:21:10 -1891
Blythe 10:08:14 -38.4 Dark Down 44.5 127.7 Up 09:53:14 - 10:23:14 -1907
Henderson 10:07:50 -37.3 Dark Down 42.7 129.0 Up 09:52:50 - 10:22:50 -1918
Pasco 10:06:20 -32.6 Dark Down 33.5 130.5 Up 09:51:20 - 10:21:20 -1919
Manson/Chelan 10:06:06 -31.8 Dark Down 31.9 130.2 Up 09:51:06 - 10:21:06 -1919
PNWRO 10:06:23 -32.7 Dark Down 33.8 130.6 Up 09:51:23 - 10:21:23 -1923
Mohave Valley 10:08:03 -37.7 Dark Down 43.7 128.7 Up 09:53:03 - 10:23:03 -1929
Laughlin/Bullhead City 10:07:58 -37.5 Dark Down 43.5 128.8 Up 09:52:58 - 10:22:58 -1933
Parker 10:08:07 -37.9 Dark Down 44.4 128.4 Up 09:53:07 - 10:23:07 -1937
Lake Havasu City 10:08:06 -37.7 Dark Down 44.1 128.6 Up 09:53:06 - 10:23:06 -1941
Brewster 10:06:05 -31.5 Dark Down 32.0 130.6 Up 09:51:05 - 10:21:05 -1947
Okanogan 10:06:02 -31.2 Dark Down 31.9 130.9 Up 09:51:02 - 10:21:02 -1969
Kingman/Dolan Springs 10:07:57 -37.2 Dark Down 43.8 129.4 Up 09:52:57 - 10:22:57 -1971
Patrick 10:07:54 -36.9 Dark Down 43.8 129.7 Up 09:52:54 - 10:22:54 -1989
Tonasket 10:05:58 -30.9 Dark Down 31.7 131.2 Up 09:50:58 - 10:20:58 -1990
Oliver 10:05:55 -30.6 Dark Down 31.3 131.3 Up 09:50:55 - 10:20:55 -2002
Anarchist Mountain Observatory 10:05:55 -30.6 Dark Down 31.6 131.4 Up 09:50:55 - 10:20:55 -2005
Summerland 10:05:53 -30.3 Dark Down 31.0 131.4 Up 09:50:53 - 10:20:53 -2012
Peachland 10:05:50 -30.2 Dark Down 30.9 131.4 Up 09:50:50 - 10:20:50 -2013
Penticton 10:05:54 -30.3 Dark Down 31.1 131.5 Up 09:50:54 - 10:20:54 -2016
Kelowna 10:05:48 -30.0 Dark Down 30.9 131.7 Up 09:50:48 - 10:20:48 -2033
Clarence Fulton 10:05:45 -29.7 Dark Down 30.7 132.0 Up 09:50:45 - 10:20:45 -2057
George/Scottsdale 10:08:08 -36.5 Dark Down 46.2 130.7 Up 09:53:08 - 10:23:08 -2117
Dunrhomin 10:06:56 -28.7 Dark Down 44.9 143.0 Up 09:51:56 - 10:21:56 -2713

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 87269, (2021/09/15 10:13UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 15.28 146
67Bet Eri      05:07:50.8 -05:05:13  2.8 12.39 139
PPM 147584     04:28:32.1 +01:22:50  5.5  0.72 136
PPM 147539     04:25:56.2 +01:01:54  7.5  0.41 136
PPM 147538     04:25:53.9 +01:06:57  9.5  0.33 136
PPM 147548     04:26:25.9 +01:40:43 10.3  0.31 136
87269          04:25:41.0 +01:26:13 15.1       136
Positions are for J2000

Event circumstances last updated at 2021/08/30 01:15:55 UT

Marc W. Buie, Southwest Research Institute

RECON