RECON: TNO occultation with 491767

Event between (491767) 12VU113 and star GA0980:00279766 with event index number of 2318140

Geocentric closest approach at 2021/11/18 02:23:15 UTC

J2000 position of star is 03:15:52.5 +08:07:07
Equinox of date position of star is 03:17:02.6 +08:11:53
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 10 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 36.7 AU from the Sun and 35.8 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 188 seconds.
The 1-sigma cross-track error in the shadow position is 4684 km.
The sky-plane scale is 25934.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.8
Diameter=173.8 km assuming a 5% albedo -- 6.6 sec chord
Diameter=70.9 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 491767, (2021/11/18 02:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.7 +16:33:05  0.8 21.25  28
Menkar         03:03:25.6 +04:10:27  2.5  5.26  11
PPM 146333     03:13:36.2 +06:44:31  5.6  1.69  11
PPM 146370     03:15:58.6 +09:03:31  8.5  0.90  10
PPM 146355     03:14:43.9 +07:52:47  9.2  0.66  10
PPM 146392     03:17:33.9 +08:04:49 11.4  0.17  10
491767         03:17:02.9 +08:11:54 16.6        10
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 4.8 sigma about the mid-time.
The median site spacing is 37.8 km RECON observability=0.2 and success probability=2.6%
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 02:25:21 -21.5 Dark Up 16.1 96.7 Really Low 02:10:21 - 02:40:21 3532
Kelowna 02:25:23 -21.3 Dark Up 16.0 96.5 Really Low 02:10:23 - 02:40:23 3510
Peachland 02:25:23 -21.1 Dark Up 15.8 96.2 Really Low 02:10:23 - 02:40:23 3507
Summerland 02:25:24 -21.2 Dark Up 15.9 96.2 Really Low 02:10:24 - 02:40:24 3497
Penticton 02:25:24 -21.3 Dark Up 16.0 96.3 Really Low 02:10:24 - 02:40:24 3491
Victoria 02:25:30 -18.6 Dark Up 13.6 93.1 Really Low 02:10:30 - 02:40:30 3475
Oliver 02:25:26 -21.2 Dark Up 16.0 96.2 Really Low 02:10:26 - 02:40:26 3469
Anarchist Mountain Observatory 02:25:26 -21.3 Dark Up 16.2 96.3 Really Low 02:10:26 - 02:40:26 3456
Tonasket 02:25:27 -21.3 Dark Up 16.2 96.2 Really Low 02:10:27 - 02:40:27 3437
Okanogan 02:25:28 -21.1 Dark Up 16.1 96.0 Really Low 02:10:28 - 02:40:28 3418
Brewster 02:25:29 -21.0 Dark Up 16.0 95.7 Really Low 02:10:29 - 02:40:29 3403
Manson/Chelan 02:25:30 -20.7 Dark Up 15.8 95.4 Really Low 02:10:30 - 02:40:30 3394
Wenatchee 02:25:32 -20.6 Dark Up 15.7 95.1 Really Low 02:10:32 - 02:40:32 3365
Ellensburg 02:25:34 -20.4 Dark Up 15.6 94.9 Really Low 02:10:34 - 02:40:34 3341
Yakima 02:25:35 -20.3 Dark Up 15.7 94.7 Really Low 02:10:35 - 02:40:35 3315
Toppenish/White Swan 02:25:36 -20.4 Dark Up 15.8 94.8 Really Low 02:10:36 - 02:40:36 3298
Pasco 02:25:35 -21.3 Dark Up 16.7 95.7 Really Low 02:10:35 - 02:40:35 3273
Goldendale 02:25:38 -20.0 Dark Up 15.5 94.4 Really Low 02:10:38 - 02:40:38 3267
The Dalles 02:25:39 -19.8 Dark Up 15.3 94.0 Really Low 02:10:39 - 02:40:39 3256
PNWRO 02:25:36 -21.4 Dark Up 16.9 95.8 Really Low 02:10:36 - 02:40:36 3253
Maupin 02:25:40 -19.8 Dark Up 15.4 94.0 Really Low 02:10:40 - 02:40:40 3226
Sisters 02:25:44 -19.3 Dark Up 15.1 93.4 Really Low 02:10:44 - 02:40:44 3172
Redmond 02:25:43 -19.6 Dark Up 15.4 93.7 Really Low 02:10:43 - 02:40:43 3165
Bend 02:25:44 -19.5 Dark Up 15.3 93.5 Really Low 02:10:44 - 02:40:44 3152
Oregon Observatory 02:25:45 -19.4 Dark Up 15.3 93.4 Really Low 02:10:45 - 02:40:45 3142
La Pine/Gilchrist 02:25:46 -19.3 Dark Up 15.2 93.3 Really Low 02:10:46 - 02:40:46 3128
North Lake 02:25:47 -19.7 Dark Up 15.7 93.6 Really Low 02:10:47 - 02:40:47 3089
Chiloquin 02:25:49 -18.9 Dark Up 15.0 92.8 Really Low 02:10:49 - 02:40:49 3054
Paisley 02:25:48 -19.9 Dark Up 16.0 93.7 Really Low 02:10:48 - 02:40:48 3045
Klamath Falls 02:25:51 -18.9 Dark Up 15.1 92.7 Really Low 02:10:51 - 02:40:51 3028
Lakeview 02:25:50 -19.9 Dark Up 16.2 93.7 Really Low 02:10:50 - 02:40:50 3005
Cedarville 02:25:52 -20.0 Dark Up 16.4 93.6 Really Low 02:10:52 - 02:40:52 2954
Fall River/Burney 02:25:54 -19.0 Dark Up 15.5 92.7 Really Low 02:10:54 - 02:40:54 2936
Susanville 02:25:56 -19.4 Dark Up 16.1 93.0 Really Low 02:10:56 - 02:40:56 2878
Greenville 02:25:57 -19.2 Dark Up 15.9 92.7 Really Low 02:10:57 - 02:40:57 2861
Gimple 02:25:57 -19.2 Dark Up 15.9 92.8 Really Low 02:10:57 - 02:40:57 2860
Quincy 02:25:57 -19.2 Dark Up 15.9 92.7 Really Low 02:10:57 - 02:40:57 2846
Portola 02:25:57 -19.5 Dark Up 16.2 92.9 Really Low 02:10:57 - 02:40:57 2830
Reno 02:25:58 -20.0 Dark Up 16.8 93.3 Really Low 02:10:58 - 02:40:58 2800
Carson City 02:25:59 -19.9 Dark Up 16.8 93.2 Really Low 02:10:59 - 02:40:59 2772
Gardnerville 02:26:00 -19.9 Dark Up 16.9 93.2 Really Low 02:11:00 - 02:41:00 2752
Yerington 02:25:59 -20.4 Dark Up 17.3 93.5 Really Low 02:10:59 - 02:40:59 2747
Hawthorne 02:26:00 -20.7 Dark Up 17.7 93.7 Really Low 02:11:00 - 02:41:00 2703
Lee Vining 02:26:02 -20.3 Dark Up 17.4 93.3 Really Low 02:11:02 - 02:41:02 2666
Tonopah 02:26:00 -21.8 Dark Up 18.9 94.5 Really Low 02:11:00 - 02:41:00 2644
Dunrhomin 02:25:38 -31.1 Dark Up 27.7 103.6 Low 02:10:38 - 02:40:38 2625
Bishop 02:26:03 -20.7 Dark Up 18.0 93.5 Really Low 02:11:03 - 02:41:03 2607
Beatty 02:26:03 -22.0 Dark Up 19.4 94.4 Really Low 02:11:03 - 02:41:03 2544
Indian Springs 02:26:03 -22.8 Dark Up 20.2 94.9 Low 02:11:03 - 02:41:03 2500
CPSLO 02:26:11 -18.6 Dark Up 16.3 91.5 Really Low 02:11:11 - 02:41:11 2475
Henderson 02:26:04 -23.3 Dark Up 20.8 95.2 Low 02:11:04 - 02:41:04 2445
Patrick 02:26:04 -24.1 Dark Up 21.8 95.6 Low 02:11:04 - 02:41:04 2375
Laughlin/Bullhead City 02:26:06 -23.5 Dark Up 21.3 95.1 Low 02:11:06 - 02:41:06 2366
Kingman/Dolan Springs 02:26:05 -23.9 Dark Up 21.7 95.4 Low 02:11:05 - 02:41:05 2359
Mohave Valley 02:26:06 -23.4 Dark Up 21.3 95.0 Low 02:11:06 - 02:41:06 2343
Wildwood 02:26:13 -20.1 Dark Up 18.1 92.4 Really Low 02:11:13 - 02:41:13 2342
Lake Havasu City 02:26:07 -23.6 Dark Up 21.5 95.0 Low 02:11:07 - 02:41:07 2305
Idyllwild 02:26:12 -21.5 Dark Up 19.6 93.3 Really Low 02:11:12 - 02:41:12 2281
Parker 02:26:08 -23.6 Dark Up 21.6 94.9 Low 02:11:08 - 02:41:08 2275
Blythe 02:26:09 -23.3 Dark Up 21.4 94.5 Low 02:11:09 - 02:41:09 2235
Calipatria 02:26:12 -22.4 Dark Up 20.7 93.8 Low 02:11:12 - 02:41:12 2208
George/Scottsdale 02:26:06 -25.5 Dark Up 23.6 96.1 Low 02:11:06 - 02:41:06 2197
Yuma 02:26:13 -23.1 Dark Up 21.4 94.1 Low 02:11:13 - 02:41:13 2156

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 491767, (2021/11/18 02:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 21.25  28
Menkar         03:02:16.8 +04:05:21  2.5  5.26  11
PPM 146333     03:12:26.3 +06:39:39  5.6  1.69  11
PPM 146370     03:14:47.8 +08:58:42  8.5  0.90  10
PPM 146355     03:13:33.6 +07:47:56  9.2  0.66  10
PPM 146392     03:16:23.5 +08:00:03 11.4  0.17  10
491767         03:15:52.5 +08:07:07 16.6        10
Positions are for J2000

Event circumstances last updated at 2021/10/11 01:42:54 UT

Marc W. Buie, Southwest Research Institute

RECON