RECON: TNO occultation with 487581

Event between (487581) 15BE519 and star GA1000:03508106 with event index number of 357314

Geocentric closest approach at 2019/03/17 08:37:39 UTC

J2000 position of star is 11:19:39.0 +11:07:35
Equinox of date position of star is 11:20:37.7 +11:01:24
Stellar brightness G=13.6, 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 297 seconds.
The 1-sigma cross-track error in the shadow position is 5572 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 13.6        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 3.0 sigma about the mid-time.
The median site spacing is 13.7 km RECON observability=1.0 and success probability=5.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:38:11 -41.0 Dark Up 49.3 202.8 Up 08:23:11 - 08:53:11 -3749
Summerland 08:38:13 -41.1 Dark Up 49.5 202.3 Up 08:23:13 - 08:53:13 -3764
Penticton 08:38:10 -41.4 Dark Up 49.7 202.7 Up 08:23:10 - 08:53:10 -3779
Okanagan Falls 08:38:11 -41.6 Dark Up 49.9 202.7 Up 08:23:11 - 08:53:11 -3793
Oliver 08:38:10 -41.8 Dark Up 50.0 202.8 Up 08:23:10 - 08:53:10 -3804
Anarchist Mountain Observatory 08:38:09 -41.9 Dark Up 50.1 203.2 Up 08:23:09 - 08:53:09 -3809
Oroville 08:38:10 -42.0 Dark Up 50.2 203.1 Up 08:23:10 - 08:53:10 -3817
Tonasket 08:38:10 -42.2 Dark Up 50.4 203.2 Up 08:23:10 - 08:53:10 -3833
Okanogan 08:38:09 -42.6 Dark Up 50.8 203.2 Up 08:23:09 - 08:53:09 -3861
Brewster 08:38:09 -42.8 Dark Up 51.1 203.0 Up 08:23:09 - 08:53:09 -3887
Niwot 08:37:12 -46.4 Dark Up 51.4 229.4 Up 08:22:12 - 08:52:12 -3908
Manson/Chelan 08:38:10 -43.1 Dark Up 51.4 202.5 Up 08:23:10 - 08:53:10 -3915
Entiat 08:38:08 -43.3 Dark Up 51.6 202.5 Up 08:23:08 - 08:53:08 -3933
Wenatchee 08:38:08 -43.6 Dark Up 51.9 202.5 Up 08:23:08 - 08:53:08 -3955
Ellensburg 08:38:07 -44.0 Dark Up 52.3 202.4 Up 08:23:07 - 08:53:07 -3992
Pasco 08:38:03 -44.6 Dark Up 52.6 204.9 Up 08:23:03 - 08:53:03 -3996
PNWRO 08:38:02 -44.8 Dark Up 52.8 205.4 Up 08:23:02 - 08:53:02 -4005
Yakima 08:38:08 -44.4 Dark Up 52.7 202.5 Up 08:23:08 - 08:53:08 -4023
George/Umatilla 08:38:03 -44.9 Dark Up 53.0 204.8 Up 08:23:03 - 08:53:03 -4028
Toppenish/White Swan 08:38:06 -44.6 Dark Up 52.8 202.9 Up 08:23:06 - 08:53:06 -4032
Goldendale 08:38:06 -45.2 Dark Up 53.5 202.5 Up 08:23:06 - 08:53:06 -4088
The Dalles 08:38:06 -45.5 Dark Up 53.8 202.0 Up 08:23:06 - 08:53:06 -4118
Maupin 08:38:06 -45.9 Dark Up 54.1 202.4 Up 08:23:06 - 08:53:06 -4146
Madras/Culver 08:38:05 -46.4 Dark Up 54.6 202.6 Up 08:23:05 - 08:53:05 -4188
Redmond 08:38:03 -46.8 Dark Up 55.0 202.7 Up 08:23:03 - 08:53:03 -4217
Sisters 08:38:05 -46.8 Dark Up 55.1 202.1 Up 08:23:05 - 08:53:05 -4230
Bend 08:38:03 -47.0 Dark Up 55.2 202.6 Up 08:23:03 - 08:53:03 -4239
Oregon Observatory 08:38:03 -47.2 Dark Up 55.4 202.5 Up 08:23:03 - 08:53:03 -4257
La Pine/Gilchrist 08:38:03 -47.4 Dark Up 55.6 202.5 Up 08:23:03 - 08:53:03 -4275
North Lake 08:38:01 -47.8 Dark Up 55.9 203.8 Up 08:23:01 - 08:53:01 -4286
Paisley 08:37:58 -48.3 Dark Up 56.3 204.7 Up 08:22:58 - 08:52:58 -4315
Lakeview 08:37:58 -48.7 Dark Up 56.7 205.3 Up 08:22:58 - 08:52:58 -4347
Chiloquin 08:38:03 -48.5 Dark Up 56.8 202.6 Up 08:23:03 - 08:53:03 -4374
Cedarville 08:37:55 -49.4 Dark Up 57.2 206.0 Up 08:22:55 - 08:52:55 -4391
Klamath Falls 08:38:00 -48.9 Dark Up 57.1 202.9 Up 08:23:00 - 08:53:00 -4398
Tulelake 08:37:59 -49.1 Dark Up 57.2 203.6 Up 08:22:59 - 08:52:59 -4408
Fall River/Burney 08:37:57 -50.0 Dark Up 58.0 204.3 Up 08:22:57 - 08:52:57 -4476
Susanville 08:37:54 -50.5 Dark Up 58.4 206.0 Up 08:22:54 - 08:52:54 -4498
Gimple 08:37:54 -50.8 Dark Up 58.7 205.8 Up 08:22:54 - 08:52:54 -4528
Greenville 08:37:54 -50.8 Dark Up 58.7 205.7 Up 08:22:54 - 08:52:54 -4531
Reno 08:37:51 -51.2 Dark Up 58.9 208.1 Up 08:22:51 - 08:52:51 -4534
Portola 08:37:52 -51.1 Dark Up 58.8 206.7 Up 08:22:52 - 08:52:52 -4539
Quincy 08:37:54 -51.0 Dark Up 58.9 205.8 Up 08:22:54 - 08:52:54 -4547
Tonopah 08:37:39 -52.2 Dark Up 59.1 213.8 Up 08:22:39 - 08:52:39 -4548
Yerington 08:37:47 -51.7 Dark Up 59.1 209.7 Up 08:22:47 - 08:52:47 -4552
Carson City 08:37:48 -51.6 Dark Up 59.2 208.4 Up 08:22:48 - 08:52:48 -4562
Hawthorne 08:37:44 -52.0 Dark Up 59.3 211.0 Up 08:22:44 - 08:52:44 -4568
Gardnerville 08:37:48 -51.8 Dark Up 59.4 208.7 Up 08:22:48 - 08:52:48 -4580
Indian Springs 08:37:30 -53.2 Dark Up 59.6 217.8 Up 08:22:30 - 08:52:30 -4605
DCO 08:37:21 -53.8 Dark Up 59.4 223.5 Up 08:22:21 - 08:52:21 -4617
Henderson 08:37:27 -53.5 Dark Up 59.7 219.5 Up 08:22:27 - 08:52:27 -4619
Patrick 08:37:23 -53.8 Dark Up 59.6 222.0 Up 08:22:23 - 08:52:23 -4622
Beatty 08:37:34 -53.2 Dark Up 59.9 215.7 Up 08:22:34 - 08:52:34 -4623
Lee Vining 08:37:44 -52.7 Dark Up 60.0 210.6 Up 08:22:44 - 08:52:44 -4634
Kingman/Dolan Springs 08:37:24 -54.1 Dark Up 59.8 222.0 Up 08:22:24 - 08:52:24 -4648
Bishop 08:37:41 -53.1 Dark Up 60.2 212.4 Up 08:22:41 - 08:52:41 -4653
Searchlight/Boulder City 08:37:26 -54.1 Dark Up 60.1 220.2 Up 08:22:26 - 08:52:26 -4663
Laughlin/Bullhead City 08:37:25 -54.2 Dark Up 60.1 221.1 Up 08:22:25 - 08:52:25 -4672
Mohave Valley 08:37:24 -54.5 Dark Up 60.3 221.5 Up 08:22:24 - 08:52:24 -4694
Lone Pine 08:37:37 -53.8 Dark Up 60.7 213.7 Up 08:22:37 - 08:52:37 -4701
Lake Havasu City 08:37:21 -54.8 Dark Up 60.5 222.3 Up 08:22:21 - 08:52:21 -4716
Parker 08:37:22 -55.1 Dark Up 60.7 222.8 Up 08:22:22 - 08:52:22 -4744
Blythe 08:37:21 -55.7 Dark Up 61.3 222.9 Up 08:22:21 - 08:52:21 -4800
Yuma 08:37:18 -56.6 Dark Up 62.0 224.0 Up 08:22:18 - 08:52:18 -4879
Calipatria 08:37:23 -56.4 Dark Up 62.2 222.0 Up 08:22:23 - 08:52:23 -4882
Idyllwild 08:37:27 -56.2 Dark Up 62.4 219.2 Up 08:22:27 - 08:52:27 -4882
CPSLO 08:37:44 -55.5 Dark Up 62.9 210.2 Up 08:22:44 - 08:52:44 -4918
Wildwood 08:37:34 -56.3 Dark Up 63.0 215.3 Up 08:22:34 - 08:52:34 -4933

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       11:49:02.9 +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 13.6        42
Positions are for J2000

Event circumstances last updated at 2018/10/23 21:01:57 UT

Marc W. Buie, Southwest Research Institute

RECON