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 11:20:35.0 +11:01:41
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 236 seconds.
The 1-sigma cross-track error in the shadow position is 4481 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       11:50:02.3 +14:27:53  2.1  7.95  48
PPM 128238     11:25:58.6 +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 3.8 sigma about the mid-time.
The median site spacing is 14.3 km RECON observability=1.0 and success probability=5.6%
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 08:23:20 - 08:53:20 -3779
Tonasket 08:38:20 -42.2 Dark Up 50.4 203.3 Up 08:23:20 - 08:53:20 -3795
Okanogan 08:38:20 -42.6 Dark Up 50.8 203.2 Up 08:23:20 - 08:53:20 -3823
Brewster 08:38:19 -42.8 Dark Up 51.1 203.1 Up 08:23:19 - 08:53:19 -3850
Niwot 08:37:23 -46.4 Dark Up 51.4 229.5 Up 08:22:23 - 08:52:23 -3870
Manson/Chelan 08:38:20 -43.1 Dark Up 51.4 202.6 Up 08:23:20 - 08:53:20 -3877
Entiat 08:38:20 -43.3 Dark Up 51.6 202.6 Up 08:23:20 - 08:53:20 -3895
Wenatchee 08:38:19 -43.6 Dark Up 51.9 202.6 Up 08:23:19 - 08:53:19 -3917
Ellensburg 08:38:19 -44.0 Dark Up 52.3 202.4 Up 08:23:19 - 08:53:19 -3955
Pasco 08:38:14 -44.6 Dark Up 52.6 205.0 Up 08:23:14 - 08:53:14 -3958
PNWRO 08:38:13 -44.8 Dark Up 52.7 205.5 Up 08:23:13 - 08:53:13 -3968
Yakima 08:38:18 -44.4 Dark Up 52.7 202.6 Up 08:23:18 - 08:53:18 -3984
George/Umatilla 08:38:14 -44.9 Dark Up 53.0 204.8 Up 08:23:14 - 08:53:14 -3990
Toppenish/White Swan 08:38:17 -44.6 Dark Up 52.8 203.0 Up 08:23:17 - 08:53:17 -3994
Goldendale 08:38:18 -45.2 Dark Up 53.5 202.6 Up 08:23:18 - 08:53:18 -4050
The Dalles 08:38:18 -45.5 Dark Up 53.8 202.1 Up 08:23:18 - 08:53:18 -4080
Maupin 08:38:16 -45.9 Dark Up 54.1 202.5 Up 08:23:16 - 08:53:16 -4107
Madras/Culver 08:38:16 -46.4 Dark Up 54.6 202.7 Up 08:23:16 - 08:53:16 -4150
Redmond 08:38:15 -46.8 Dark Up 55.0 202.8 Up 08:23:15 - 08:53:15 -4179
Sisters 08:38:16 -46.8 Dark Up 55.1 202.2 Up 08:23:16 - 08:53:16 -4192
Bend 08:38:15 -47.0 Dark Up 55.2 202.7 Up 08:23:15 - 08:53:15 -4201
Oregon Observatory 08:38:14 -47.2 Dark Up 55.4 202.6 Up 08:23:14 - 08:53:14 -4219
La Pine/Gilchrist 08:38:14 -47.4 Dark Up 55.6 202.6 Up 08:23:14 - 08:53:14 -4237
North Lake 08:38:13 -47.8 Dark Up 55.8 203.9 Up 08:23:13 - 08:53:13 -4248
Paisley 08:38:10 -48.3 Dark Up 56.2 204.8 Up 08:23:10 - 08:53:10 -4276
Lakeview 08:38:08 -48.7 Dark Up 56.6 205.4 Up 08:23:08 - 08:53:08 -4308
Chiloquin 08:38:14 -48.5 Dark Up 56.7 202.6 Up 08:23:14 - 08:53:14 -4336
Cedarville 08:38:06 -49.3 Dark Up 57.2 206.1 Up 08:23:06 - 08:53:06 -4353
Klamath Falls 08:38:12 -48.9 Dark Up 57.0 203.0 Up 08:23:12 - 08:53:12 -4360
Tulelake 08:38:10 -49.1 Dark Up 57.2 203.6 Up 08:23:10 - 08:53:10 -4370
Fall River/Burney 08:38:09 -50.0 Dark Up 58.0 204.4 Up 08:23:09 - 08:53:09 -4438
Susanville 08:38:05 -50.5 Dark Up 58.3 206.1 Up 08:23:05 - 08:53:05 -4460
Gimple 08:38:05 -50.8 Dark Up 58.7 205.9 Up 08:23:05 - 08:53:05 -4490
Greenville 08:38:06 -50.8 Dark Up 58.7 205.7 Up 08:23:06 - 08:53:06 -4493
Reno 08:38:01 -51.2 Dark Up 58.8 208.2 Up 08:23:01 - 08:53:01 -4496
Portola 08:38:03 -51.1 Dark Up 58.8 206.8 Up 08:23:03 - 08:53:03 -4501
Quincy 08:38:05 -51.0 Dark Up 58.9 205.9 Up 08:23:05 - 08:53:05 -4509
Tonopah 08:37:50 -52.2 Dark Up 59.1 213.9 Up 08:22:50 - 08:52:50 -4510
Yerington 08:37:58 -51.7 Dark Up 59.1 209.7 Up 08:22:58 - 08:52:58 -4514
Carson City 08:38:01 -51.6 Dark Up 59.1 208.5 Up 08:23:01 - 08:53:01 -4524
Hawthorne 08:37:55 -52.0 Dark Up 59.3 211.0 Up 08:22:55 - 08:52:55 -4530
Gardnerville 08:37:59 -51.8 Dark Up 59.3 208.7 Up 08:22:59 - 08:52:59 -4542
Indian Springs 08:37:43 -53.2 Dark Up 59.6 217.9 Up 08:22:43 - 08:52:43 -4566
DCO 08:37:31 -53.8 Dark Up 59.4 223.6 Up 08:22:31 - 08:52:31 -4579
Henderson 08:37:40 -53.5 Dark Up 59.7 219.6 Up 08:22:40 - 08:52:40 -4580
Patrick 08:37:35 -53.8 Dark Up 59.5 222.1 Up 08:22:35 - 08:52:35 -4584
Beatty 08:37:47 -53.2 Dark Up 59.8 215.8 Up 08:22:47 - 08:52:47 -4585
Lee Vining 08:37:55 -52.7 Dark Up 60.0 210.7 Up 08:22:55 - 08:52:55 -4596
Kingman/Dolan Springs 08:37:35 -54.0 Dark Up 59.8 222.0 Up 08:22:35 - 08:52:35 -4610
Bishop 08:37:52 -53.1 Dark Up 60.2 212.5 Up 08:22:52 - 08:52:52 -4615
Searchlight/Boulder City 08:37:38 -54.1 Dark Up 60.1 220.3 Up 08:22:38 - 08:52:38 -4624
Laughlin/Bullhead City 08:37:35 -54.2 Dark Up 60.1 221.2 Up 08:22:35 - 08:52:35 -4634
Mohave Valley 08:37:35 -54.5 Dark Up 60.3 221.5 Up 08:22:35 - 08:52:35 -4656
Lone Pine 08:37:50 -53.8 Dark Up 60.7 213.8 Up 08:22:50 - 08:52:50 -4663
Lake Havasu City 08:37:34 -54.8 Dark Up 60.5 222.4 Up 08:22:34 - 08:52:34 -4678
Parker 08:37:32 -55.1 Dark Up 60.7 222.9 Up 08:22:32 - 08:52:32 -4706
Blythe 08:37:33 -55.7 Dark Up 61.3 223.0 Up 08:22:33 - 08:52:33 -4762
Yuma 08:37:30 -56.5 Dark Up 62.0 224.1 Up 08:22:30 - 08:52:30 -4841
Calipatria 08:37:34 -56.4 Dark Up 62.2 222.1 Up 08:22:34 - 08:52:34 -4844
Idyllwild 08:37:39 -56.2 Dark Up 62.3 219.3 Up 08:22:39 - 08:52:39 -4844
CPSLO 08:37:54 -55.5 Dark Up 62.9 210.3 Up 08:22:54 - 08:52:54 -4879
Wildwood 08:37:44 -56.3 Dark Up 63.0 215.4 Up 08:22:44 - 08:52:44 -4894

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 2017/12/05 19:18:45 UT

Marc W. Buie, Southwest Research Institute

RECON