RECON: TNO occultation with 11BQ170

Event between 11BQ170 and star GA0840:04088470 with event index number of 1577117

Geocentric closest approach at 2023/03/15 07:03:55 UTC

J2000 position of star is 11:55:06.1 -04:12:25
Equinox of date position of star is 11:56:08.1 -04:19:09
Stellar brightness G=11.5, use SENSEUP=8
Star is 86 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=25.7

[RECON map]
TNO is 37.8 AU from the Sun and 36.9 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 351 seconds.
The 1-sigma cross-track error in the shadow position is 4853 km.
The sky-plane scale is 26735.6 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=317.7 km assuming a 5% albedo -- 2.5 sec chord
Diameter=129.7 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 11BQ170, (2023/03/15 07:04UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:25.1 -11:16:54  1.0 23.36  63
4Gam Crv       12:17:00.2 -17:40:14  2.6 14.27  76
PPM 194890     11:52:13.5 -05:27:45  5.6  1.51  87
PPM 194933     11:54:38.8 -04:00:46  8.1  0.52  87
PPM 194971     11:56:52.4 -04:10:33  8.8  0.22  86
11BQ170        11:56:17.4 -04:20:09 11.5        86
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 2.6 sigma about the mid-time.
The median site spacing is 12.5 km RECON observability=1.0 and success probability=6.8%
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 07:06:12 -40.3 Dark Down 33.2 157.3 Up 06:51:12 - 07:21:12 3293
Kelowna 07:06:12 -40.6 Dark Down 33.5 157.0 Up 06:51:12 - 07:21:12 3261
Peachland 07:06:13 -40.7 Dark Down 33.5 156.7 Up 06:51:13 - 07:21:13 3244
Summerland 07:06:13 -40.8 Dark Down 33.7 156.7 Up 06:51:13 - 07:21:13 3236
Penticton 07:06:12 -40.9 Dark Down 33.8 156.8 Up 06:51:12 - 07:21:12 3235
Oliver 07:06:12 -41.3 Dark Down 34.1 156.7 Up 06:51:12 - 07:21:12 3209
Anarchist Mountain Observatory 07:06:12 -41.5 Dark Down 34.3 156.9 Up 06:51:12 - 07:21:12 3203
Tonasket 07:06:12 -41.7 Dark Down 34.6 156.8 Up 06:51:12 - 07:21:12 3178
Okanogan 07:06:12 -42.0 Dark Down 34.8 156.5 Up 06:51:12 - 07:21:12 3149
Brewster 07:06:13 -42.2 Dark Down 35.0 156.2 Up 06:51:13 - 07:21:13 3123
Manson/Chelan 07:06:13 -42.3 Dark Down 35.1 155.7 Up 06:51:13 - 07:21:13 3096
Entiat 07:06:14 -42.5 Dark Down 35.3 155.5 Up 06:51:14 - 07:21:14 3078
Wenatchee 07:06:14 -42.7 Dark Down 35.5 155.3 Up 06:51:14 - 07:21:14 3056
Victoria 07:06:21 -40.9 Dark Down 33.6 152.1 Up 06:51:21 - 07:21:21 3045
Ellensburg 07:06:14 -43.0 Dark Down 35.8 155.0 Up 06:51:14 - 07:21:14 3018
Niwot 07:05:26 -52.1 Dark Down 45.5 173.0 Up 06:50:26 - 07:20:26 3017
Pasco 07:06:11 -44.1 Dark Down 36.9 156.4 Up 06:51:11 - 07:21:11 3006
SwRI 07:05:27 -52.2 Dark Down 45.5 172.8 Up 06:50:27 - 07:20:27 3005
PNWRO 07:06:09 -44.4 Dark Down 37.2 156.6 Up 06:51:09 - 07:21:09 2995
Yakima 07:06:15 -43.4 Dark Down 36.2 154.8 Up 06:51:15 - 07:21:15 2987
Toppenish/White Swan 07:06:13 -43.7 Dark Down 36.4 154.9 Up 06:51:13 - 07:21:13 2976
Goldendale 07:06:15 -44.1 Dark Down 36.8 154.3 Up 06:51:15 - 07:21:15 2920
The Dalles 07:06:16 -44.2 Dark Down 36.9 153.8 Up 06:51:16 - 07:21:16 2891
Maupin 07:06:16 -44.6 Dark Down 37.3 153.8 Up 06:51:16 - 07:21:16 2862
Redmond 07:06:16 -45.4 Dark Down 38.1 153.3 Up 06:51:16 - 07:21:16 2788
Sisters 07:06:17 -45.2 Dark Down 37.9 152.9 Up 06:51:17 - 07:21:17 2777
Bend 07:06:16 -45.5 Dark Down 38.2 153.1 Up 06:51:16 - 07:21:16 2767
Oregon Observatory 07:06:16 -45.6 Dark Down 38.3 152.9 Up 06:51:16 - 07:21:16 2749
La Pine/Gilchrist 07:06:16 -45.8 Dark Down 38.5 152.7 Up 06:51:16 - 07:21:16 2731
North Lake 07:06:14 -46.4 Dark Down 39.1 153.3 Up 06:51:14 - 07:21:14 2716
Paisley 07:06:14 -47.0 Dark Down 39.7 153.5 Up 06:51:14 - 07:21:14 2684
Lakeview 07:06:13 -47.5 Dark Down 40.2 153.6 Up 06:51:13 - 07:21:13 2650
Klamath Falls 07:06:17 -47.0 Dark Down 39.7 151.8 Up 06:51:17 - 07:21:17 2604
Cedarville 07:06:12 -48.2 Dark Down 40.8 153.5 Up 06:51:12 - 07:21:12 2603
Fall River/Burney 07:06:15 -48.2 Dark Down 40.9 151.8 Up 06:51:15 - 07:21:15 2521
Susanville 07:06:13 -49.0 Dark Down 41.7 152.5 Up 06:51:13 - 07:21:13 2494
Gimple 07:06:14 -49.2 Dark Down 41.8 152.1 Up 06:51:14 - 07:21:14 2464
Greenville 07:06:13 -49.2 Dark Down 41.8 152.0 Up 06:51:13 - 07:21:13 2461
Reno 07:06:10 -50.1 Dark Down 42.7 153.2 Up 06:51:10 - 07:21:10 2452
Portola 07:06:12 -49.6 Dark Down 42.3 152.5 Up 06:51:12 - 07:21:12 2451
Quincy 07:06:14 -49.4 Dark Down 42.0 151.9 Up 06:51:14 - 07:21:14 2445
Yerington 07:06:08 -50.8 Dark Down 43.5 153.8 Up 06:51:08 - 07:21:08 2429
Carson City 07:06:10 -50.4 Dark Down 43.1 153.0 Up 06:51:10 - 07:21:10 2423
Tonopah 07:06:02 -52.2 Dark Down 44.9 155.9 Up 06:51:02 - 07:21:02 2421
Hawthorne 07:06:06 -51.4 Dark Down 44.1 154.3 Up 06:51:06 - 07:21:06 2409
Gardnerville 07:06:10 -50.7 Dark Down 43.3 153.0 Up 06:51:10 - 07:21:10 2404
Indian Springs 07:05:56 -54.1 Dark Down 46.8 157.4 Up 06:50:56 - 07:20:56 2353
Lee Vining 07:06:07 -51.7 Dark Down 44.4 153.4 Up 06:51:07 - 07:21:07 2344
Beatty 07:05:59 -53.4 Dark Down 46.1 156.0 Up 06:50:59 - 07:20:59 2341
Henderson 07:05:53 -54.7 Dark Down 47.5 158.1 Up 06:50:53 - 07:20:53 2334
DCO 07:05:47 -56.1 Dark Down 48.9 160.3 Up 06:50:47 - 07:20:47 2324
Patrick 07:05:49 -55.6 Dark Down 48.4 159.4 Up 06:50:49 - 07:20:49 2323
Bishop 07:06:05 -52.5 Dark Down 45.2 154.1 Up 06:51:05 - 07:21:05 2320
Kingman/Dolan Springs 07:05:50 -55.8 Dark Down 48.5 159.0 Up 06:50:50 - 07:20:50 2297
Searchlight/Boulder City 07:05:53 -55.3 Dark Down 48.0 157.9 Up 06:50:53 - 07:20:53 2288
Laughlin/Bullhead City 07:05:51 -55.7 Dark Down 48.4 158.3 Up 06:50:51 - 07:20:51 2275
George/Scottsdale 07:05:41 -57.7 Dark Down 50.5 161.7 Up 06:50:41 - 07:20:41 2256
Mohave Valley 07:05:51 -55.9 Dark Down 48.7 158.2 Up 06:50:51 - 07:20:51 2253
Lake Havasu City 07:05:50 -56.4 Dark Down 49.1 158.4 Up 06:50:50 - 07:20:50 2228
Parker 07:05:50 -56.7 Dark Down 49.4 158.3 Up 06:50:50 - 07:20:50 2199
Blythe 07:05:50 -57.1 Dark Down 49.8 157.6 Up 06:50:50 - 07:20:50 2142
Idyllwild 07:05:57 -56.4 Dark Down 49.0 154.6 Up 06:50:57 - 07:20:57 2072
Calipatria 07:05:52 -57.3 Dark Down 50.0 156.0 Up 06:50:52 - 07:20:52 2063
Yuma 07:05:49 -58.0 Dark Down 50.7 157.1 Up 06:50:49 - 07:20:49 2060
CPSLO 07:06:10 -53.6 Dark Down 46.1 150.1 Up 06:51:10 - 07:21:10 2059
Wildwood 07:06:03 -55.4 Dark Down 48.0 152.2 Up 06:51:03 - 07:21:03 2031

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 11BQ170, (2023/03/15 07:04UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 23.36  63
4Gam Crv       12:15:48.1 -17:32:31  2.6 14.27  76
PPM 194890     11:51:02.2 -05:20:00  5.6  1.51  87
PPM 194933     11:53:27.5 -03:53:01  8.1  0.52  87
PPM 194971     11:55:41.1 -04:02:49  8.8  0.22  86
11BQ170        11:55:06.1 -04:12:25 11.5        86
Positions are for J2000

Event circumstances last updated at 2020/03/15 22:14:51 UT

Marc W. Buie, Southwest Research Institute

RECON