RECON: TNO occultation with 341275

Event between (341275) 07RG283 and star GA1300:03633440 with event index number of 1112875

Geocentric closest approach at 2021/12/11 10:13:25 UTC

J2000 position of star is 06:46:29.4 +41:12:09
Equinox of date position of star is 06:47:58.1 +41:10:43
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 106 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=20.5

[RECON map]
TNO is 15.3 AU from the Sun and 14.4 AU from the Earth.
The TNO is moving 20.8 km/sec on the sky relative to the star, or, 7.2 arcsec/hr.
The 1-sigma error in the time of the event is 81 seconds.
The 1-sigma cross-track error in the shadow position is 1000 km.
The sky-plane scale is 10451.9 km/arcsec.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 5.5 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 341275, (2021/12/11 10:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:39.4 +27:58:17  1.1 17.84 120
34Bet Aur      06:01:08.4 +44:56:50  1.9  9.35  97
58Psi7Aur      06:52:18.9 +41:45:12  6.0  0.99 107
PPM 049350     06:49:54.3 +41:16:35  8.4  0.37 106
PPM 049332     06:48:28.9 +41:09:19  9.1  0.09 106
341275         06:48:02.0 +41:10:39 16.0       106
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 5.0 sigma about the mid-time.
The median site spacing is 25.2 km RECON observability=1.0 and success probability=14.0%
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 10:12:46 -51.2 Dark Down 77.4 228.9 Up 10:05:30 - 10:20:02 3258
Kelowna 10:12:46 -51.5 Dark Down 77.7 229.8 Up 10:05:30 - 10:20:02 3214
Peachland 10:12:47 -51.7 Dark Down 78.0 229.4 Up 10:05:31 - 10:20:03 3198
Summerland 10:12:46 -51.7 Dark Down 78.0 230.2 Up 10:05:30 - 10:20:02 3183
Penticton 10:12:46 -51.7 Dark Down 78.0 230.7 Up 10:05:30 - 10:20:02 3178
Oliver 10:12:46 -51.9 Dark Down 78.2 232.0 Up 10:05:30 - 10:20:02 3140
Anarchist Mountain Observatory 10:12:45 -51.9 Dark Down 78.2 233.2 Up 10:05:29 - 10:20:01 3125
Tonasket 10:12:45 -52.1 Dark Down 78.4 234.2 Up 10:05:29 - 10:20:01 3090
Okanogan 10:12:45 -52.3 Dark Down 78.7 235.2 Up 10:05:29 - 10:20:01 3052
Brewster 10:12:45 -52.6 Dark Down 79.0 235.8 Up 10:05:29 - 10:20:01 3020
Victoria 10:12:59 -54.4 Dark Down 80.5 222.7 Up 10:05:43 - 10:20:15 3016
Manson/Chelan 10:12:46 -52.9 Dark Down 79.3 235.7 Up 10:05:30 - 10:20:02 2992
Wenatchee 10:12:46 -53.2 Dark Down 79.7 237.4 Up 10:05:30 - 10:20:02 2938
Ellensburg 10:12:47 -53.6 Dark Down 80.0 238.7 Up 10:05:31 - 10:20:03 2890
Yakima 10:12:46 -53.8 Dark Down 80.2 240.7 Up 10:05:30 - 10:20:02 2845
Pasco 10:12:41 -53.1 Dark Down 79.5 245.9 Up 10:05:25 - 10:19:57 2831
Toppenish/White Swan 10:12:45 -53.8 Dark Down 80.2 242.2 Up 10:05:29 - 10:20:01 2825
PNWRO 10:12:39 -53.0 Dark Down 79.5 247.6 Up 10:05:23 - 10:19:55 2808
Goldendale 10:12:46 -54.3 Dark Down 80.7 244.1 Up 10:05:30 - 10:20:02 2758
The Dalles 10:12:47 -54.6 Dark Down 81.1 244.4 Up 10:05:31 - 10:20:03 2728
Maupin 10:12:47 -54.7 Dark Down 81.2 247.1 Up 10:05:31 - 10:20:03 2684
Redmond 10:12:46 -55.2 Dark Down 81.5 252.5 Up 10:05:30 - 10:20:02 2585
Sisters 10:12:47 -55.5 Dark Down 81.8 251.4 Up 10:05:31 - 10:20:03 2581
Bend 10:12:46 -55.4 Dark Down 81.7 253.6 Up 10:05:30 - 10:20:02 2559
Oregon Observatory 10:12:47 -55.6 Dark Down 81.8 254.4 Up 10:05:31 - 10:20:03 2538
La Pine/Gilchrist 10:12:46 -55.7 Dark Down 81.9 255.7 Up 10:05:30 - 10:20:02 2515
Dunrhomin 10:11:42 -45.2 Dark Down 70.0 281.4 Up 10:04:26 - 10:18:58 2514
North Lake 10:12:44 -55.5 Dark Down 81.6 259.7 Up 10:05:28 - 10:20:00 2477
Paisley 10:12:42 -55.5 Dark Down 81.4 263.8 Up 10:05:26 - 10:19:58 2422
Lakeview 10:12:41 -55.6 Dark Down 81.3 267.4 Up 10:05:25 - 10:19:57 2370
Klamath Falls 10:12:46 -56.5 Dark Down 82.4 265.7 Up 10:05:30 - 10:20:02 2352
Cedarville 10:12:39 -55.7 Dark Down 81.2 271.8 Up 10:05:23 - 10:19:55 2302
Fall River/Burney 10:12:43 -56.7 Dark Down 82.1 274.6 Up 10:05:27 - 10:19:59 2229
Susanville 10:12:40 -56.4 Dark Down 81.5 279.0 Up 10:05:24 - 10:19:56 2172
Gimple 10:12:40 -56.7 Dark Down 81.6 280.8 Up 10:05:24 - 10:19:56 2139
Greenville 10:12:41 -56.7 Dark Down 81.6 280.8 Up 10:05:25 - 10:19:57 2138
Quincy 10:12:41 -56.8 Dark Down 81.6 282.2 Up 10:05:25 - 10:19:57 2116
Portola 10:12:39 -56.5 Dark Down 81.2 282.8 Up 10:05:23 - 10:19:55 2110
Reno 10:12:36 -56.1 Dark Down 80.7 284.1 Up 10:05:20 - 10:19:52 2092
Carson City 10:12:35 -56.2 Dark Down 80.6 286.2 Up 10:05:19 - 10:19:51 2053
Yerington 10:12:33 -55.8 Dark Down 80.0 286.9 Up 10:05:17 - 10:19:49 2043
Gardnerville 10:12:35 -56.3 Dark Down 80.5 287.6 Up 10:05:19 - 10:19:51 2027
Hawthorne 10:12:30 -55.6 Dark Down 79.5 289.0 Up 10:05:14 - 10:19:46 2002
Tonopah 10:12:24 -54.6 Dark Down 78.3 290.2 Up 10:05:08 - 10:19:40 1979
Lee Vining 10:12:31 -56.1 Dark Down 79.7 292.3 Up 10:05:15 - 10:19:47 1932
Bishop 10:12:28 -55.7 Dark Down 78.9 294.4 Up 10:05:12 - 10:19:44 1881
Beatty 10:12:21 -54.6 Dark Down 77.6 294.8 Up 10:05:05 - 10:19:37 1864
Indian Springs 10:12:16 -53.8 Dark Down 76.7 295.2 Up 10:05:00 - 10:19:32 1851
Henderson 10:12:12 -53.3 Dark Down 75.9 296.6 Up 10:04:56 - 10:19:28 1810
Patrick 10:12:07 -52.6 Dark Down 74.8 297.8 Up 10:04:51 - 10:19:23 1768
Kingman/Dolan Springs 10:12:08 -52.7 Dark Down 74.9 298.7 Up 10:04:52 - 10:19:24 1740
Laughlin/Bullhead City 10:12:10 -53.2 Dark Down 75.2 299.2 Up 10:04:54 - 10:19:26 1726
Mohave Valley 10:12:09 -53.2 Dark Down 75.1 300.1 Up 10:04:53 - 10:19:25 1697
Lake Havasu City 10:12:08 -53.1 Dark Down 74.7 301.2 Up 10:04:52 - 10:19:24 1660
George/Scottsdale 10:11:57 -51.1 Dark Down 72.6 301.3 Up 10:04:41 - 10:19:13 1638
Parker 10:12:07 -53.1 Dark Down 74.5 302.2 Up 10:04:51 - 10:19:23 1623
CPSLO 10:12:35 -57.9 Dark Down 79.4 307.2 Up 10:05:19 - 10:19:51 1616
Blythe 10:12:08 -53.4 Dark Down 74.4 304.1 Up 10:04:52 - 10:19:24 1560
Idyllwild 10:12:17 -55.1 Dark Down 75.9 306.4 Up 10:05:01 - 10:19:33 1524
Wildwood 10:12:25 -56.6 Dark Down 77.4 308.1 Up 10:05:09 - 10:19:41 1523
Calipatria 10:12:11 -54.2 Dark Down 74.8 306.7 Up 10:04:55 - 10:19:27 1485
Yuma 10:12:07 -53.5 Dark Down 73.9 306.8 Up 10:04:51 - 10:19:23 1460

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 341275, (2021/12/11 10:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 17.84 120
34Bet Aur      05:59:31.6 +44:56:51  1.9  9.35  97
58Psi7Aur      06:50:45.9 +41:46:50  6.0  0.99 107
PPM 049350     06:48:21.7 +41:18:08  8.4  0.37 106
PPM 049332     06:46:56.3 +41:10:50  9.1  0.09 106
341275         06:46:29.4 +41:12:09 16.0       106
Positions are for J2000

Event circumstances last updated at 2021/01/04 22:01:27 UT

Marc W. Buie, Southwest Research Institute

RECON