RECON: TNO occultation with 15BY518

Event between 15BY518 and star GA0820:03873207 with event index number of 1038881

Geocentric closest approach at 2020/01/18 09:10:50 UTC

J2000 position of star is 09:34:52.5 -06:51:21
Equinox of date position of star is 09:35:50.4 -06:56:36
Stellar brightness G=16.3, use SENSEUP=128
Star is 73 degrees from the moon. Moon is 41% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 37.9 AU from the Sun and 37.1 AU from the Earth.
The TNO is moving 21.2 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 209 seconds.
The 1-sigma cross-track error in the shadow position is 1356 km.
The sky-plane scale is 26925.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=310.5 km assuming a 5% albedo -- 14.6 sec chord
Diameter=126.7 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 15BY518, (2020/01/18 09:11UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.3 +11:52:07  1.3 20.58  69
Alphard        09:28:34.4 -08:44:47  2.0  2.55  75
33 Hya         09:35:32.7 -06:00:19  5.6  0.94  73
PPM 192568     09:37:50.1 -07:07:22  8.3  0.52  73
PPM 192523     09:35:26.1 -06:56:47  9.3  0.11  73
15BY518        09:35:52.3 -06:56:46 16.3        73
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 4.3 sigma about the mid-time.
The median site spacing is 15.4 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:11:58 -58.1 Dark Down 32.8 170.7 Up 08:56:58 - 09:26:58 11934
Summerland 09:11:59 -58.4 Dark Down 33.1 170.3 Up 08:56:59 - 09:26:59 11911
Penticton 09:12:00 -58.4 Dark Down 33.2 170.5 Up 08:57:00 - 09:27:00 11909
Okanagan Falls 09:11:59 -58.6 Dark Down 33.4 170.4 Up 08:56:59 - 09:26:59 11897
Oliver 09:11:59 -58.7 Dark Down 33.5 170.4 Up 08:56:59 - 09:26:59 11887
Anarchist Mountain Observatory 09:11:59 -58.8 Dark Down 33.7 170.6 Up 08:56:59 - 09:26:59 11878
Oroville 09:11:59 -58.9 Dark Down 33.8 170.5 Up 08:56:59 - 09:26:59 11873
Tonasket 09:11:59 -59.1 Dark Down 34.0 170.5 Up 08:56:59 - 09:26:59 11858
Okanogan 09:11:59 -59.5 Dark Down 34.3 170.3 Up 08:56:59 - 09:26:59 11834
Brewster 09:11:59 -59.8 Dark Down 34.6 170.0 Up 08:56:59 - 09:26:59 11814
Manson/Chelan 09:12:02 -60.1 Dark Down 34.7 169.6 Up 08:57:02 - 09:27:02 11795
Entiat 09:12:01 -60.3 Dark Down 34.9 169.5 Up 08:57:01 - 09:27:01 11780
Wenatchee 09:12:01 -60.5 Dark Down 35.2 169.3 Up 08:57:01 - 09:27:01 11762
Ellensburg 09:12:03 -61.0 Dark Down 35.6 169.0 Up 08:57:03 - 09:27:03 11731
Yakima 09:12:03 -61.3 Dark Down 36.0 168.9 Up 08:57:03 - 09:27:03 11703
Pasco 09:11:57 -61.1 Dark Down 36.5 170.6 Up 08:56:57 - 09:26:57 11701
Toppenish/White Swan 09:12:02 -61.5 Dark Down 36.2 169.1 Up 08:57:02 - 09:27:02 11691
PNWRO 09:11:57 -61.2 Dark Down 36.7 170.9 Up 08:56:57 - 09:26:57 11687
George/Umatilla 09:11:58 -61.5 Dark Down 36.8 170.3 Up 08:56:58 - 09:26:58 11675
Goldendale 09:12:02 -62.1 Dark Down 36.7 168.5 Up 08:57:02 - 09:27:02 11647
The Dalles 09:12:05 -62.4 Dark Down 36.8 168.0 Up 08:57:05 - 09:27:05 11627
Maupin 09:12:05 -62.7 Dark Down 37.3 168.1 Up 08:57:05 - 09:27:05 11599
Madras/Culver 09:12:05 -63.2 Dark Down 37.8 167.9 Up 08:57:05 - 09:27:05 11560
Redmond 09:12:05 -63.5 Dark Down 38.1 167.8 Up 08:57:05 - 09:27:05 11534
Sisters 09:12:06 -63.7 Dark Down 38.1 167.3 Up 08:57:06 - 09:27:06 11530
Bend 09:12:04 -63.8 Dark Down 38.3 167.6 Up 08:57:04 - 09:27:04 11517
Oregon Observatory 09:12:07 -64.0 Dark Down 38.5 167.4 Up 08:57:07 - 09:27:07 11502
La Pine/Gilchrist 09:12:07 -64.2 Dark Down 38.7 167.3 Up 08:57:07 - 09:27:07 11487
North Lake 09:12:05 -64.3 Dark Down 39.2 168.0 Up 08:57:05 - 09:27:05 11465
Niwot 09:11:03 -57.8 Dark Up 42.7 188.3 Up 08:56:03 - 09:26:03 11459
SwRI 09:11:04 -57.9 Dark Up 42.8 188.2 Up 08:56:04 - 09:26:04 11450
Paisley 09:12:03 -64.6 Dark Down 39.8 168.3 Up 08:57:03 - 09:27:03 11430
Chiloquin 09:12:07 -65.2 Dark Down 39.7 166.7 Up 08:57:07 - 09:27:07 11401
Lakeview 09:12:02 -65.0 Dark Down 40.3 168.5 Up 08:57:02 - 09:27:02 11396
Klamath Falls 09:12:07 -65.5 Dark Down 40.0 166.7 Up 08:57:07 - 09:27:07 11377
Tulelake 09:12:07 -65.6 Dark Down 40.4 167.0 Up 08:57:07 - 09:27:07 11361
Cedarville 09:12:01 -65.4 Dark Down 41.0 168.6 Up 08:57:01 - 09:27:01 11350
Fall River/Burney 09:12:06 -66.3 Dark Down 41.3 167.0 Up 08:57:06 - 09:27:06 11294
Susanville 09:12:02 -66.5 Dark Down 42.0 167.8 Up 08:57:02 - 09:27:02 11258
Gimple 09:12:03 -66.8 Dark Down 42.2 167.5 Up 08:57:03 - 09:27:03 11234
Greenville 09:12:04 -66.9 Dark Down 42.2 167.4 Up 08:57:04 - 09:27:04 11232
Quincy 09:12:04 -67.0 Dark Down 42.4 167.3 Up 08:57:04 - 09:27:04 11217
Portola 09:12:01 -66.9 Dark Down 42.6 167.9 Up 08:57:01 - 09:27:01 11215
Reno 09:12:00 -66.8 Dark Down 43.0 168.7 Up 08:57:00 - 09:27:00 11204
Carson City 09:12:00 -67.1 Dark Down 43.3 168.7 Up 08:57:00 - 09:27:00 11177
Yerington 09:11:56 -66.9 Dark Up 43.6 169.5 Up 08:56:56 - 09:26:56 11172
Gardnerville 09:11:59 -67.2 Dark Down 43.6 168.7 Up 08:56:59 - 09:26:59 11159
Hawthorne 09:11:55 -67.0 Dark Up 44.1 170.1 Up 08:56:55 - 09:26:55 11144
Tonopah 09:11:50 -66.5 Dark Up 44.8 172.0 Up 08:56:50 - 09:26:50 11129
Lee Vining 09:11:57 -67.6 Dark Up 44.6 169.4 Up 08:56:57 - 09:26:57 11092
Bishop 09:11:55 -67.7 Dark Up 45.3 170.3 Up 08:56:55 - 09:26:55 11056
Beatty 09:11:48 -67.0 Dark Up 46.0 172.5 Up 08:56:48 - 09:26:48 11045
Indian Springs 09:11:42 -66.6 Dark Up 46.4 173.9 Up 08:56:42 - 09:26:42 11036
Henderson 09:11:39 -66.4 Dark Up 47.0 174.9 Up 08:56:39 - 09:26:39 11004
Lone Pine 09:11:52 -68.0 Dark Up 46.1 170.6 Up 08:56:52 - 09:26:52 11000
Patrick 09:11:35 -66.0 Dark Up 47.7 176.4 Up 08:56:35 - 09:26:35 10970
Searchlight/Boulder City 09:11:38 -66.7 Dark Up 47.6 174.9 Up 08:56:38 - 09:26:38 10958
DCO 09:11:32 -65.7 Dark Up 48.0 177.4 Up 08:56:32 - 09:26:32 10956
Kingman/Dolan Springs 09:11:34 -66.3 Dark Up 47.9 176.1 Up 08:56:34 - 09:26:34 10949
Laughlin/Bullhead City 09:11:38 -66.6 Dark Up 47.9 175.4 Up 08:56:38 - 09:26:38 10939
Mohave Valley 09:11:38 -66.8 Dark Up 48.1 175.4 Up 08:56:38 - 09:26:38 10917
Lake Havasu City 09:11:36 -66.8 Dark Up 48.6 175.7 Up 08:56:36 - 09:26:36 10888
Parker 09:11:35 -67.0 Dark Up 48.9 175.7 Up 08:56:35 - 09:26:35 10859
CPSLO 09:12:02 -70.4 Dark Down 47.0 166.7 Up 08:57:02 - 09:27:02 10851
Blythe 09:11:38 -67.5 Dark Up 49.4 175.2 Up 08:56:38 - 09:26:38 10811
Idyllwild 09:11:45 -68.9 Dark Up 49.1 172.0 Up 08:56:45 - 09:26:45 10786
Wildwood 09:11:54 -69.9 Dark Up 48.5 169.3 Up 08:56:54 - 09:26:54 10785
Calipatria 09:11:40 -68.4 Dark Up 49.8 173.7 Up 08:56:40 - 09:26:40 10754
Yuma 09:11:36 -68.0 Dark Up 50.3 175.0 Up 08:56:36 - 09:26:36 10732

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 15BY518, (2020/01/18 09:11UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 20.58  69
Alphard        09:27:35.2 -08:39:31  2.0  2.55  75
33 Hya         09:34:32.7 -05:54:55  5.6  0.94  73
PPM 192568     09:36:50.3 -07:01:55  8.3  0.52  73
PPM 192523     09:34:26.4 -06:51:23  9.3  0.11  73
15BY518        09:34:52.5 -06:51:21 16.3        73
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:10:50 UT

Marc W. Buie, Southwest Research Institute

RECON