RECON: TNO occultation with 15BQ518

Event between 15BQ518 and star GA0800:04016419 with event index number of 1058761

Geocentric closest approach at 2021/03/03 06:42:03 UTC

J2000 position of star is 10:43:47.0 -09:05:59
Equinox of date position of star is 10:44:45.4 -09:12:07
Stellar brightness G=13.9, use SENSEUP=64
Star is 53 degrees from the moon. Moon is 80% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 42.7 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 25.5 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 246 seconds.
The 1-sigma cross-track error in the shadow position is 4111 km.
The sky-plane scale is 30254.2 km/arcsec.

The TNO has an absolute magnitude Hv=5.9
Diameter=394.5 km assuming a 5% albedo -- 15.5 sec chord
Diameter=161.0 km assuming a 30% albedo -- 6.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 15BQ518, (2021/03/03 06:42UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:29.9 +11:51:47  1.3 22.83  66
Alphard        09:28:37.7 -08:45:05  2.0 18.82  72
PPM 193828     10:50:47.1 -09:57:55  5.5  1.65  52
PPM 193705     10:43:30.9 -08:50:18  7.1  0.50  53
PPM 193719     10:44:17.6 -09:11:31  9.3  0.14  53
15BQ518        10:44:50.6 -09:12:40 13.9        53
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 3.7 sigma about the mid-time.
The median site spacing is 11.8 km RECON observability=1.0 and success probability=6.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:44:06 -43.3 Dark Up 28.9 159.6 Low 06:29:06 - 06:59:06 4740
Summerland 06:44:06 -43.4 Dark Up 29.1 159.2 Low 06:29:06 - 06:59:06 4713
Penticton 06:44:06 -43.5 Dark Up 29.2 159.3 Low 06:29:06 - 06:59:06 4712
Okanagan Falls 06:44:06 -43.7 Dark Up 29.4 159.2 Low 06:29:06 - 06:59:06 4699
Oliver 06:44:06 -43.8 Dark Up 29.6 159.2 Low 06:29:06 - 06:59:06 4689
Anarchist Mountain Observatory 06:44:05 -44.0 Dark Up 29.8 159.4 Low 06:29:05 - 06:59:05 4683
Oroville 06:44:05 -44.1 Dark Up 29.8 159.3 Low 06:29:05 - 06:59:05 4676
Tonasket 06:44:06 -44.3 Dark Up 30.0 159.3 Up 06:29:06 - 06:59:06 4661
Okanogan 06:44:06 -44.5 Dark Up 30.3 159.0 Up 06:29:06 - 06:59:06 4635
Brewster 06:44:07 -44.7 Dark Up 30.5 158.7 Up 06:29:07 - 06:59:07 4612
Manson/Chelan 06:44:07 -44.7 Dark Up 30.6 158.3 Up 06:29:07 - 06:59:07 4587
Entiat 06:44:07 -44.9 Dark Up 30.8 158.2 Up 06:29:07 - 06:59:07 4570
Wenatchee 06:44:08 -45.1 Dark Up 31.0 158.0 Up 06:29:08 - 06:59:08 4550
Ellensburg 06:44:09 -45.3 Dark Up 31.4 157.7 Up 06:29:09 - 06:59:09 4516
Niwot 06:43:22 -56.0 Dark Up 40.7 174.8 Up 06:28:22 - 06:58:22 4508
Pasco 06:44:06 -46.5 Dark Up 32.4 159.1 Up 06:29:06 - 06:59:06 4507
SwRI 06:43:23 -56.1 Dark Up 40.8 174.7 Up 06:28:23 - 06:58:23 4498
PNWRO 06:44:05 -46.8 Dark Up 32.7 159.3 Up 06:29:05 - 06:59:05 4497
Yakima 06:44:09 -45.7 Dark Up 31.7 157.6 Up 06:29:09 - 06:59:09 4488
Toppenish/White Swan 06:44:07 -45.9 Dark Up 32.0 157.7 Up 06:29:07 - 06:59:07 4478
George/Umatilla 06:44:06 -46.7 Dark Up 32.7 158.8 Up 06:29:06 - 06:59:06 4477
Goldendale 06:44:09 -46.2 Dark Up 32.4 157.1 Up 06:29:09 - 06:59:09 4427
The Dalles 06:44:11 -46.3 Dark Up 32.5 156.6 Up 06:29:11 - 06:59:11 4400
Maupin 06:44:10 -46.7 Dark Up 32.9 156.6 Up 06:29:10 - 06:59:10 4374
Madras/Culver 06:44:10 -47.1 Dark Up 33.4 156.4 Up 06:29:10 - 06:59:10 4334
Redmond 06:44:11 -47.4 Dark Up 33.7 156.3 Up 06:29:11 - 06:59:11 4306
Sisters 06:44:11 -47.2 Dark Up 33.6 155.8 Up 06:29:11 - 06:59:11 4296
Bend 06:44:10 -47.5 Dark Up 33.9 156.1 Up 06:29:10 - 06:59:10 4287
Oregon Observatory 06:44:12 -47.6 Dark Up 34.0 155.9 Up 06:29:12 - 06:59:12 4270
La Pine/Gilchrist 06:44:12 -47.7 Dark Up 34.1 155.8 Up 06:29:12 - 06:59:12 4253
North Lake 06:44:10 -48.3 Dark Up 34.7 156.3 Up 06:29:10 - 06:59:10 4240
Paisley 06:44:09 -48.9 Dark Up 35.3 156.6 Up 06:29:09 - 06:59:09 4211
Lakeview 06:44:08 -49.4 Dark Up 35.8 156.6 Up 06:29:08 - 06:59:08 4180
Chiloquin 06:44:13 -48.5 Dark Up 35.0 155.0 Up 06:29:13 - 06:59:13 4160
Klamath Falls 06:44:12 -48.8 Dark Up 35.4 155.0 Up 06:29:12 - 06:59:12 4137
Cedarville 06:44:07 -50.0 Dark Up 36.5 156.7 Up 06:29:07 - 06:59:07 4136
Tulelake 06:44:12 -49.1 Dark Up 35.7 155.3 Up 06:29:12 - 06:59:12 4127
Fall River/Burney 06:44:11 -49.9 Dark Up 36.6 155.1 Up 06:29:11 - 06:59:11 4060
Susanville 06:44:08 -50.7 Dark Up 37.4 155.8 Up 06:29:08 - 06:59:08 4036
Gimple 06:44:09 -50.8 Dark Up 37.6 155.4 Up 06:29:09 - 06:59:09 4008
Greenville 06:44:10 -50.8 Dark Up 37.5 155.3 Up 06:29:10 - 06:59:10 4006
Reno 06:44:06 -51.8 Dark Up 38.4 156.5 Up 06:29:06 - 06:59:06 3997
Portola 06:44:08 -51.3 Dark Up 38.0 155.8 Up 06:29:08 - 06:59:08 3996
Quincy 06:44:10 -51.0 Dark Up 37.7 155.3 Up 06:29:10 - 06:59:10 3990
Yerington 06:44:04 -52.5 Dark Up 39.1 157.1 Up 06:29:04 - 06:59:04 3976
Carson City 06:44:06 -52.1 Dark Up 38.8 156.4 Up 06:29:06 - 06:59:06 3970
Tonopah 06:43:58 -54.2 Dark Up 40.6 159.1 Up 06:28:58 - 06:58:58 3968
Hawthorne 06:44:03 -53.1 Dark Up 39.7 157.6 Up 06:29:03 - 06:59:03 3957
Gardnerville 06:44:06 -52.3 Dark Up 39.0 156.4 Up 06:29:06 - 06:59:06 3953
Indian Springs 06:43:53 -56.1 Dark Up 42.4 160.6 Up 06:28:53 - 06:58:53 3904
Lee Vining 06:44:03 -53.4 Dark Up 40.1 156.8 Up 06:29:03 - 06:59:03 3897
Beatty 06:43:57 -55.3 Dark Up 41.8 159.4 Up 06:28:57 - 06:58:57 3893
Henderson 06:43:50 -56.8 Dark Up 43.1 161.3 Up 06:28:50 - 06:58:50 3886
DCO 06:43:45 -58.4 Dark Up 44.4 163.5 Up 06:28:45 - 06:58:45 3874
Bishop 06:44:02 -54.2 Dark Up 40.9 157.5 Up 06:29:02 - 06:59:02 3874
Patrick 06:43:47 -57.8 Dark Up 43.9 162.6 Up 06:28:47 - 06:58:47 3874
Kingman/Dolan Springs 06:43:46 -57.9 Dark Up 44.1 162.3 Up 06:28:46 - 06:58:46 3850
Searchlight/Boulder City 06:43:49 -57.3 Dark Up 43.6 161.2 Up 06:28:49 - 06:58:49 3842
Laughlin/Bullhead City 06:43:48 -57.7 Dark Up 44.0 161.6 Up 06:28:48 - 06:58:48 3830
Lone Pine 06:43:59 -55.0 Dark Up 41.7 157.6 Up 06:28:59 - 06:58:59 3825
Mohave Valley 06:43:48 -57.9 Dark Up 44.2 161.5 Up 06:28:48 - 06:58:48 3809
Lake Havasu City 06:43:47 -58.4 Dark Up 44.7 161.7 Up 06:28:47 - 06:58:47 3785
Parker 06:43:47 -58.7 Dark Up 45.0 161.7 Up 06:28:47 - 06:58:47 3758
Blythe 06:43:47 -59.0 Dark Up 45.4 161.1 Up 06:28:47 - 06:58:47 3705
Idyllwild 06:43:54 -57.9 Dark Up 44.7 158.3 Up 06:28:54 - 06:58:54 3640
Calipatria 06:43:50 -59.0 Dark Up 45.7 159.7 Up 06:28:50 - 06:58:50 3632
CPSLO 06:44:07 -54.7 Dark Up 42.0 153.9 Up 06:29:07 - 06:59:07 3631
Yuma 06:43:47 -59.8 Dark Up 46.3 160.7 Up 06:28:47 - 06:58:47 3628
Wildwood 06:44:00 -56.7 Dark Up 43.8 156.0 Up 06:29:00 - 06:59:00 3603

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 15BQ518, (2021/03/03 06:42UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 22.83  66
Alphard        09:27:35.2 -08:39:31  2.0 18.82  72
PPM 193828     10:49:43.5 -09:51:10  5.5  1.65  52
PPM 193705     10:42:27.3 -08:43:38  7.1  0.50  53
PPM 193719     10:43:14.0 -09:04:50  9.3  0.14  53
15BQ518        10:43:47.0 -09:05:59 13.9        53
Positions are for J2000

Event circumstances last updated at 2019/06/08 01:05:08 UT

Marc W. Buie, Southwest Research Institute

RECON