RECON: TNO occultation with 487581

Event between (487581) 15BE519 and star UC4-506-052869 with event index number of 186073

Geocentric closest approach at 2019/03/17 08:37:50 UTC

J2000 position of star is 11:19:39.0 +11:07:35
Equinox of date position of star is 11:20:32.9 +11:01:54
Stellar brightness R=13.7, use SENSEUP=64
Star is 42 degrees from the moon. Moon is 81% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 47.2 AU from the Sun and 46.3 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 157 seconds.
The 1-sigma cross-track error in the shadow position is 3101 km.
The sky-plane scale is 33549.6 km/arcsec.

The TNO has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 18.7 sec chord
Diameter=195.4 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 487581, (2019/03/17 08:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:23.6 +11:52:21  1.3 17.48  25
Denebola       11:50:02.4 +14:27:53  2.1  7.95  48
PPM 128238     11:25:58.7 +11:19:28  5.8  1.34  43
PPM 128145     11:19:21.1 +11:52:44  6.8  0.92  41
PPM 128173     11:21:11.0 +11:05:41 10.0  0.15  42
487581         11:20:39.0 +11:01:16 13.7        42
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 5.0 sigma about the mid-time.
The median site spacing is 14.2 km RECON observability=1.0 and success probability=6.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:38:20 -42.0 Dark Up 50.2 203.2 Up 08:24:47 - 08:51:53 -3769
Tonasket 08:38:19 -42.2 Dark Up 50.4 203.3 Up 08:24:46 - 08:51:52 -3785
Okanogan 08:38:20 -42.6 Dark Up 50.8 203.2 Up 08:24:47 - 08:51:53 -3814
Brewster 08:38:19 -42.8 Dark Up 51.1 203.1 Up 08:24:46 - 08:51:52 -3840
Niwot 08:37:23 -46.4 Dark Up 51.4 229.5 Up 08:23:50 - 08:50:56 -3857
Manson/Chelan 08:38:19 -43.1 Dark Up 51.4 202.6 Up 08:24:46 - 08:51:52 -3867
Entiat 08:38:20 -43.3 Dark Up 51.6 202.6 Up 08:24:47 - 08:51:53 -3885
Wenatchee 08:38:18 -43.6 Dark Up 51.9 202.6 Up 08:24:45 - 08:51:51 -3907
Ellensburg 08:38:18 -44.0 Dark Up 52.3 202.4 Up 08:24:45 - 08:51:51 -3944
Pasco 08:38:12 -44.6 Dark Up 52.6 205.0 Up 08:24:39 - 08:51:45 -3947
PNWRO 08:38:12 -44.8 Dark Up 52.7 205.5 Up 08:24:39 - 08:51:45 -3957
Yakima 08:38:17 -44.4 Dark Up 52.7 202.6 Up 08:24:44 - 08:51:50 -3974
George/Umatilla 08:38:12 -44.9 Dark Up 53.0 204.8 Up 08:24:39 - 08:51:45 -3980
Toppenish/White Swan 08:38:16 -44.6 Dark Up 52.8 203.0 Up 08:24:43 - 08:51:49 -3984
Goldendale 08:38:17 -45.2 Dark Up 53.5 202.6 Up 08:24:44 - 08:51:50 -4040
The Dalles 08:38:17 -45.5 Dark Up 53.8 202.1 Up 08:24:44 - 08:51:50 -4070
Maupin 08:38:16 -45.9 Dark Up 54.1 202.5 Up 08:24:43 - 08:51:49 -4097
Madras/Culver 08:38:14 -46.4 Dark Up 54.6 202.7 Up 08:24:41 - 08:51:47 -4139
Redmond 08:38:14 -46.8 Dark Up 55.0 202.8 Up 08:24:41 - 08:51:47 -4168
Sisters 08:38:15 -46.8 Dark Up 55.1 202.2 Up 08:24:42 - 08:51:48 -4181
Bend 08:38:14 -47.0 Dark Up 55.2 202.7 Up 08:24:41 - 08:51:47 -4189
Oregon Observatory 08:38:15 -47.2 Dark Up 55.4 202.6 Up 08:24:42 - 08:51:48 -4207
La Pine/Gilchrist 08:38:14 -47.4 Dark Up 55.6 202.6 Up 08:24:41 - 08:51:47 -4225
North Lake 08:38:11 -47.8 Dark Up 55.9 203.8 Up 08:24:38 - 08:51:44 -4236
Paisley 08:38:10 -48.3 Dark Up 56.2 204.8 Up 08:24:37 - 08:51:43 -4265
Lakeview 08:38:07 -48.7 Dark Up 56.6 205.4 Up 08:24:34 - 08:51:40 -4297
Chiloquin 08:38:12 -48.5 Dark Up 56.7 202.6 Up 08:24:39 - 08:51:45 -4325
Cedarville 08:38:05 -49.4 Dark Up 57.2 206.1 Up 08:24:32 - 08:51:38 -4341
Klamath Falls 08:38:12 -48.9 Dark Up 57.0 203.0 Up 08:24:39 - 08:51:45 -4348
Tulelake 08:38:10 -49.1 Dark Up 57.2 203.6 Up 08:24:37 - 08:51:43 -4358
Fall River/Burney 08:38:08 -50.0 Dark Up 58.0 204.3 Up 08:24:35 - 08:51:41 -4427
Susanville 08:38:04 -50.5 Dark Up 58.3 206.1 Up 08:24:31 - 08:51:37 -4447
Gimple 08:38:04 -50.8 Dark Up 58.7 205.9 Up 08:24:31 - 08:51:37 -4478
Greenville 08:38:03 -50.8 Dark Up 58.7 205.7 Up 08:24:30 - 08:51:36 -4481
Reno 08:38:01 -51.2 Dark Up 58.8 208.2 Up 08:24:28 - 08:51:34 -4484
Portola 08:38:03 -51.1 Dark Up 58.8 206.8 Up 08:24:30 - 08:51:36 -4488
Quincy 08:38:04 -51.0 Dark Up 58.9 205.9 Up 08:24:31 - 08:51:37 -4497
Tonopah 08:37:49 -52.2 Dark Up 59.1 213.9 Up 08:24:16 - 08:51:22 -4497
Yerington 08:37:57 -51.7 Dark Up 59.1 209.7 Up 08:24:24 - 08:51:30 -4502
Carson City 08:37:59 -51.6 Dark Up 59.1 208.5 Up 08:24:26 - 08:51:32 -4512
Hawthorne 08:37:54 -52.0 Dark Up 59.3 211.0 Up 08:24:21 - 08:51:27 -4518
Gardnerville 08:37:59 -51.8 Dark Up 59.3 208.7 Up 08:24:26 - 08:51:32 -4529
Indian Springs 08:37:42 -53.2 Dark Up 59.6 217.9 Up 08:24:09 - 08:51:15 -4554
DCO 08:37:30 -53.8 Dark Up 59.4 223.5 Up 08:23:57 - 08:51:03 -4566
Henderson 08:37:38 -53.5 Dark Up 59.7 219.6 Up 08:24:05 - 08:51:11 -4568
Patrick 08:37:34 -53.8 Dark Up 59.5 222.1 Up 08:24:01 - 08:51:07 -4571
Beatty 08:37:44 -53.2 Dark Up 59.8 215.7 Up 08:24:11 - 08:51:17 -4572
Lee Vining 08:37:54 -52.7 Dark Up 60.0 210.7 Up 08:24:21 - 08:51:27 -4583
Kingman/Dolan Springs 08:37:34 -54.0 Dark Up 59.8 222.0 Up 08:24:01 - 08:51:07 -4597
Bishop 08:37:51 -53.1 Dark Up 60.2 212.5 Up 08:24:18 - 08:51:24 -4602
Searchlight/Boulder City 08:37:37 -54.1 Dark Up 60.1 220.3 Up 08:24:04 - 08:51:10 -4612
Laughlin/Bullhead City 08:37:35 -54.2 Dark Up 60.1 221.2 Up 08:24:02 - 08:51:08 -4622
Mohave Valley 08:37:35 -54.5 Dark Up 60.3 221.5 Up 08:24:02 - 08:51:08 -4643
Lone Pine 08:37:49 -53.8 Dark Up 60.7 213.8 Up 08:24:16 - 08:51:22 -4650
Lake Havasu City 08:37:32 -54.8 Dark Up 60.5 222.4 Up 08:23:59 - 08:51:05 -4665
Parker 08:37:32 -55.1 Dark Up 60.7 222.9 Up 08:23:59 - 08:51:05 -4693
Blythe 08:37:30 -55.7 Dark Up 61.3 223.0 Up 08:23:57 - 08:51:03 -4750
Yuma 08:37:28 -56.5 Dark Up 62.0 224.1 Up 08:23:55 - 08:51:01 -4828
Idyllwild 08:37:38 -56.2 Dark Up 62.3 219.3 Up 08:24:05 - 08:51:11 -4831
Calipatria 08:37:33 -56.4 Dark Up 62.2 222.1 Up 08:24:00 - 08:51:06 -4831
CPSLO 08:37:54 -55.5 Dark Up 62.9 210.3 Up 08:24:21 - 08:51:27 -4867
Wildwood 08:37:44 -56.3 Dark Up 63.0 215.4 Up 08:24:11 - 08:51:17 -4882

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 487581, (2019/03/17 08:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 17.48  25
Denebola       11:49:03.0 +14:34:17  2.1  7.95  48
PPM 128238     11:24:58.8 +11:25:49  5.8  1.34  43
PPM 128145     11:18:21.1 +11:59:03  6.8  0.92  41
PPM 128173     11:20:11.1 +11:12:00 10.0  0.15  42
487581         11:19:39.0 +11:07:35 13.7        42
Positions are for J2000

Event circumstances last updated at 2017/04/01 16:58:07 UT

Marc W. Buie, Southwest Research Institute

RECON