RECON: TNO occultation with 12HW87

Event between 12HW87 and star GA0760:08304577 with event index number of 1563471

Geocentric closest approach at 2021/05/21 05:32:14 UTC

J2000 position of star is 17:37:58.9 -13:35:34
Equinox of date position of star is 17:39:11.3 -13:36:14
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 95 degrees from the moon. Moon is 65% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 33.7 AU from the Sun and 32.8 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 269 seconds.
The 1-sigma cross-track error in the shadow position is 1800 km.
The sky-plane scale is 23812.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=187.9 km assuming a 5% albedo -- 9.2 sec chord
Diameter=76.7 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 12HW87, (2021/05/21 05:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.3 -26:28:39  0.9 20.56  82
35Eta Oph      17:11:36.4 -15:45:00  2.6  7.01  89
56Omi Ser      17:42:37.1 -12:53:05  4.4  1.10  96
PPM 233406     17:40:42.9 -13:39:36  8.0  0.37  96
PPM 233360     17:39:08.9 -13:45:36  8.8  0.16  95
12HW87         17:39:11.6 -13:36:14 15.9        96
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 3.4 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.0 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)
Clarence Fulton 05:35:29 -13.2 AT Up 7.0 121.2 Really Low 05:20:29 - 05:50:29 10747
Kelowna 05:35:30 -13.5 AT Up 7.1 121.0 Really Low 05:20:30 - 05:50:30 10719
Peachland 05:35:31 -13.4 AT Up 7.0 120.8 Really Low 05:20:31 - 05:50:31 10707
Summerland 05:35:31 -13.6 AT Up 7.2 120.9 Really Low 05:20:31 - 05:50:31 10698
Penticton 05:35:32 -13.7 AT Up 7.3 120.9 Really Low 05:20:32 - 05:50:32 10696
Oliver 05:35:33 -14.0 AT Up 7.4 120.9 Really Low 05:20:33 - 05:50:33 10672
Anarchist Mountain Observatory 05:35:33 -14.2 AT Up 7.6 121.0 Really Low 05:20:33 - 05:50:33 10665
Tonasket 05:35:34 -14.4 AT Up 7.8 121.0 Really Low 05:20:34 - 05:50:34 10642
Okanogan 05:35:36 -14.7 AT Up 7.8 120.8 Really Low 05:20:36 - 05:50:36 10617
Brewster 05:35:37 -14.8 AT Up 7.9 120.6 Really Low 05:20:37 - 05:50:37 10595
Manson/Chelan 05:35:37 -14.9 AT Up 7.8 120.3 Really Low 05:20:37 - 05:50:37 10574
Victoria 05:35:40 -13.1 AT Up 5.6 117.8 Really Low 05:20:40 - 05:50:40 10558
Wenatchee 05:35:40 -15.2 AT Up 7.9 120.1 Really Low 05:20:40 - 05:50:40 10538
Ellensburg 05:35:40 -15.4 AT Up 8.0 119.9 Really Low 05:20:40 - 05:50:40 10505
Pasco 05:35:41 -16.6 AT Up 9.2 120.9 Really Low 05:20:41 - 05:50:41 10479
Yakima 05:35:43 -15.8 AT Up 8.2 119.8 Really Low 05:20:43 - 05:50:43 10476
PNWRO 05:35:41 -16.9 AT Up 9.5 121.1 Really Low 05:20:41 - 05:50:41 10466
Toppenish/White Swan 05:35:44 -16.0 AT Up 8.4 119.9 Really Low 05:20:44 - 05:50:44 10464
Goldendale 05:35:45 -16.3 AT Up 8.4 119.6 Really Low 05:20:45 - 05:50:45 10416
The Dalles 05:35:47 -16.3 AT Up 8.3 119.3 Really Low 05:20:47 - 05:50:47 10393
Maupin 05:35:48 -16.7 AT Up 8.6 119.3 Really Low 05:20:48 - 05:50:48 10364
Dunrhomin 05:35:26 -26.6 Dark Up 20.9 130.8 Low 05:20:26 - 05:50:26 10309
Redmond 05:35:51 -17.4 AT Up 9.0 119.1 Really Low 05:20:51 - 05:50:51 10296
Sisters 05:35:52 -17.3 AT Up 8.7 118.8 Really Low 05:20:52 - 05:50:52 10290
Bend 05:35:52 -17.6 AT Up 9.0 119.0 Really Low 05:20:52 - 05:50:52 10278
Oregon Observatory 05:35:53 -17.6 AT Up 9.0 118.8 Really Low 05:20:53 - 05:50:53 10262
La Pine/Gilchrist 05:35:54 -17.8 AT Up 9.1 118.8 Really Low 05:20:54 - 05:50:54 10246
North Lake 05:35:54 -18.4 Dark Up 9.7 119.2 Really Low 05:20:54 - 05:50:54 10225
Paisley 05:35:55 -19.0 Dark Up 10.2 119.4 Really Low 05:20:55 - 05:50:55 10191
Lakeview 05:35:55 -19.5 Dark Up 10.5 119.4 Really Low 05:20:55 - 05:50:55 10156
Chiloquin 05:35:58 -18.5 Dark Up 9.4 118.4 Really Low 05:20:58 - 05:50:58 10154
Klamath Falls 05:35:58 -18.8 Dark Up 9.6 118.4 Really Low 05:20:58 - 05:50:58 10130
Cedarville 05:35:58 -20.1 Dark Up 11.0 119.4 Really Low 05:20:58 - 05:50:58 10109
Fall River/Burney 05:36:01 -20.0 Dark Up 10.4 118.5 Really Low 05:21:01 - 05:51:01 10046
Susanville 05:36:02 -20.8 Dark Up 11.2 118.9 Really Low 05:21:02 - 05:51:02 10011
Gimple 05:36:03 -20.9 Dark Up 11.2 118.7 Really Low 05:21:03 - 05:51:03 9985
Greenville 05:36:02 -20.9 Dark Up 11.1 118.7 Really Low 05:21:02 - 05:51:02 9983
Portola 05:36:03 -21.4 Dark Up 11.6 118.9 Really Low 05:21:03 - 05:51:03 9967
Quincy 05:36:03 -21.1 Dark Up 11.3 118.6 Really Low 05:21:03 - 05:51:03 9967
Reno 05:36:02 -21.9 Dark Up 12.2 119.4 Really Low 05:21:02 - 05:51:02 9960
Carson City 05:36:03 -22.2 Dark Up 12.4 119.3 Really Low 05:21:03 - 05:51:03 9931
Yerington 05:36:03 -22.6 Dark Up 12.9 119.7 Really Low 05:21:03 - 05:51:03 9929
Gardnerville 05:36:03 -22.4 Dark Up 12.5 119.3 Really Low 05:21:03 - 05:51:03 9913
Hawthorne 05:36:03 -23.3 Dark Up 13.5 120.0 Really Low 05:21:03 - 05:51:03 9903
Tonopah 05:36:01 -24.3 Dark Up 14.7 120.9 Really Low 05:21:01 - 05:51:01 9895
Lee Vining 05:36:06 -23.5 Dark Up 13.5 119.6 Really Low 05:21:06 - 05:51:06 9847
Bishop 05:36:05 -24.3 Dark Up 14.3 119.9 Really Low 05:21:05 - 05:51:05 9813
Beatty 05:36:03 -25.4 Dark Up 15.6 121.0 Really Low 05:21:03 - 05:51:03 9810
Indian Springs 05:36:01 -26.2 Dark Up 16.5 121.7 Really Low 05:21:01 - 05:51:01 9806
Henderson 05:36:00 -26.9 Dark Up 17.3 122.0 Really Low 05:21:00 - 05:51:00 9777
Patrick 05:36:00 -27.9 Dark Up 18.4 122.7 Really Low 05:21:00 - 05:51:00 9749
Kingman/Dolan Springs 05:36:01 -28.0 Dark Up 18.4 122.5 Really Low 05:21:01 - 05:51:01 9726
Laughlin/Bullhead City 05:36:02 -27.8 Dark Up 18.0 122.1 Really Low 05:21:02 - 05:51:02 9713
Mohave Valley 05:36:02 -28.1 Dark Up 18.2 122.0 Really Low 05:21:02 - 05:51:02 9690
Lake Havasu City 05:36:02 -28.5 Dark Up 18.6 122.1 Really Low 05:21:02 - 05:51:02 9662
George/Scottsdale 05:35:59 -30.2 Dark Up 20.7 123.6 Low 05:20:59 - 05:50:59 9650
Parker 05:36:04 -28.8 Dark Up 18.8 122.0 Really Low 05:21:04 - 05:51:04 9633
CPSLO 05:36:14 -24.9 Dark Up 13.7 118.0 Really Low 05:21:14 - 05:51:14 9591
Blythe 05:36:05 -29.2 Dark Up 18.8 121.7 Really Low 05:21:05 - 05:51:05 9581
Idyllwild 05:36:10 -28.1 Dark Up 17.3 120.2 Really Low 05:21:10 - 05:51:10 9545
Wildwood 05:36:14 -26.9 Dark Up 15.7 119.1 Really Low 05:21:14 - 05:51:14 9533
Calipatria 05:36:08 -29.2 Dark Up 18.4 120.9 Really Low 05:21:08 - 05:51:08 9518
Yuma 05:36:08 -29.9 Dark Up 19.3 121.4 Really Low 05:21:08 - 05:51:08 9501

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 12HW87, (2021/05/21 05:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.56  82
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.01  89
56Omi Ser      17:41:24.8 -12:52:32  4.4  1.10  96
PPM 233406     17:39:30.3 -13:38:59  8.0  0.37  96
PPM 233360     17:37:56.2 -13:44:56  8.8  0.16  95
12HW87         17:37:58.9 -13:35:34 15.9        95
Positions are for J2000

Event circumstances last updated at 2021/04/21 22:32:30 UT

Marc W. Buie, Southwest Research Institute

RECON