RECON: TNO occultation with 470596

Event between (470596) 08NW4 and star UC4-450-132118 with event index number of 152743

Geocentric closest approach at 2018/09/20 07:53:52 UTC

J2000 position of star is 21:17:20.8 -00:05:16
Equinox of date position of star is 21:18:14.0 -00:00:52
Stellar brightness R=16.8, use SENSEUP=128
Star is 23 degrees from the moon. Moon is 80% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 36.6 AU from the Sun and 35.8 AU from the Earth.
The TNO is moving 19.0 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 251 seconds.
The 1-sigma cross-track error in the shadow position is 4307 km.
The sky-plane scale is 25937.3 km/arcsec.

The TNO has an absolute magnitude Hv=5.4
Diameter=501.2 km assuming a 5% albedo -- 26.4 sec chord
Diameter=204.6 km assuming a 30% albedo -- 10.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 470596, (2018/09/20 07:54UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:40.8 -29:31:21  1.2 37.99  36
Tarazed        19:47:09.0 +10:39:36  2.7 25.04  31
21 Aqr         21:26:15.5 -03:28:32  5.5  4.00  21
PPM 181230     21:17:32.2 -00:32:34  8.5  0.57  22
PPM 171511     21:16:59.8 +00:16:47  9.5  0.44  23
PPM 181234     21:18:53.2 -00:08:08 11.1  0.19  23
470596         21:18:18.4 -00:00:30 16.8        23
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 3.6 sigma about the mid-time.
The median site spacing is 22.0 km RECON observability=1.0 and success probability=6.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:49:59 -40.0 Dark Up 31.2 225.8 Up 07:34:59 - 08:04:59 7181
Tonasket 07:49:58 -40.2 Dark Up 31.3 226.0 Up 07:34:58 - 08:04:58 7161
Okanogan 07:49:57 -40.6 Dark Up 31.6 225.9 Up 07:34:57 - 08:04:57 7135
Brewster 07:50:00 -40.8 Dark Up 31.9 225.9 Up 07:35:00 - 08:05:00 7116
Manson/Chelan 07:49:59 -41.0 Dark Up 32.2 225.6 Up 07:34:59 - 08:04:59 7107
Entiat 07:50:00 -41.3 Dark Up 32.4 225.6 Up 07:35:00 - 08:05:00 7089
Wenatchee 07:50:00 -41.5 Dark Up 32.6 225.6 Up 07:35:00 - 08:05:00 7069
Ellensburg 07:50:00 -41.9 Dark Up 33.0 225.6 Up 07:35:00 - 08:05:00 7038
Yakima 07:50:00 -42.3 Dark Up 33.3 225.7 Up 07:35:00 - 08:05:00 7002
Toppenish/White Swan 07:50:00 -42.5 Dark Up 33.4 226.0 Up 07:35:00 - 08:05:00 6978
Goldendale 07:50:00 -43.1 Dark Up 34.0 225.8 Up 07:35:00 - 08:05:00 6940
Pasco 07:49:56 -42.7 Dark Up 32.8 227.4 Up 07:34:56 - 08:04:56 6932
The Dalles 07:50:02 -43.3 Dark Up 34.3 225.6 Up 07:35:02 - 08:05:02 6930
George/Umatilla 07:49:56 -43.0 Dark Up 33.2 227.3 Up 07:34:56 - 08:04:56 6908
PNWRO 07:49:53 -42.9 Dark Up 32.9 227.7 Up 07:34:53 - 08:04:53 6904
Maupin 07:50:01 -43.7 Dark Up 34.6 225.9 Up 07:35:01 - 08:05:01 6889
Madras/Culver 07:50:02 -44.3 Dark Up 35.0 226.1 Up 07:35:02 - 08:05:02 6840
Sisters 07:50:02 -44.6 Dark Up 35.4 225.8 Up 07:35:02 - 08:05:02 6823
Redmond 07:50:02 -44.6 Dark Up 35.2 226.3 Up 07:35:02 - 08:05:02 6809
Bend 07:50:00 -44.8 Dark Up 35.5 226.2 Up 07:35:00 - 08:05:00 6794
Oregon Observatory 07:50:02 -45.0 Dark Up 35.7 226.2 Up 07:35:02 - 08:05:02 6782
La Pine/Gilchrist 07:50:03 -45.2 Dark Up 35.8 226.2 Up 07:35:03 - 08:05:03 6765
North Lake 07:50:00 -45.7 Dark Up 35.8 227.1 Up 07:35:00 - 08:05:00 6707
Chiloquin 07:50:04 -46.3 Dark Up 36.8 226.4 Up 07:35:04 - 08:05:04 6672
Paisley 07:49:58 -46.2 Dark Up 36.0 227.7 Up 07:34:58 - 08:04:58 6645
Klamath Falls 07:50:03 -46.6 Dark Up 37.0 226.7 Up 07:35:03 - 08:05:03 6638
Tulelake 07:50:02 -46.9 Dark Up 37.0 227.2 Up 07:35:02 - 08:05:02 6604
Lakeview 07:49:59 -46.7 Dark Up 36.2 228.2 Up 07:34:59 - 08:04:59 6592
Cedarville 07:49:58 -47.4 Dark Up 36.6 228.7 Up 07:34:58 - 08:04:58 6525
Fall River/Burney 07:50:02 -47.8 Dark Up 37.6 227.8 Up 07:35:02 - 08:05:02 6516
Susanville 07:49:59 -48.5 Dark Up 37.6 228.9 Up 07:34:59 - 08:04:59 6434
Greenville 07:50:00 -48.8 Dark Up 37.9 228.7 Up 07:35:00 - 08:05:00 6417
Gimple 07:50:00 -48.8 Dark Up 37.9 228.8 Up 07:35:00 - 08:05:00 6414
Quincy 07:50:00 -49.0 Dark Up 38.1 228.9 Up 07:35:00 - 08:05:00 6398
Portola 07:49:59 -49.1 Dark Up 37.9 229.4 Up 07:34:59 - 08:04:59 6371
Reno 07:49:56 -49.4 Dark Up 37.7 230.2 Up 07:34:56 - 08:04:56 6326
Carson City 07:49:55 -49.7 Dark Up 37.9 230.5 Up 07:34:55 - 08:04:55 6291
Gardnerville 07:49:56 -50.0 Dark Up 38.0 230.7 Up 07:34:56 - 08:04:56 6266
Yerington 07:49:53 -49.9 Dark Up 37.6 231.2 Up 07:34:53 - 08:04:53 6252
Hawthorne 07:49:52 -50.4 Dark Up 37.6 232.0 Up 07:34:52 - 08:04:52 6191
Lee Vining 07:49:54 -51.0 Dark Up 38.2 231.9 Up 07:34:54 - 08:04:54 6152
Tonopah 07:49:48 -50.8 Dark Up 37.0 233.7 Up 07:34:48 - 08:04:48 6103
Bishop 07:49:51 -51.6 Dark Up 38.1 233.0 Up 07:34:51 - 08:04:51 6071
Lone Pine 07:49:50 -52.3 Dark Up 38.4 233.8 Up 07:34:50 - 08:04:50 5986
Niwot 07:49:14 -46.9 Dark Up 28.0 243.2 Low 07:34:14 - 08:04:14 5985
Beatty 07:49:46 -52.0 Dark Up 37.4 234.8 Up 07:34:46 - 08:04:46 5976
CPSLO 07:50:00 -53.6 Dark Up 40.8 232.1 Up 07:35:00 - 08:05:00 5940
Indian Springs 07:49:43 -52.2 Dark Up 36.9 236.0 Up 07:34:43 - 08:04:43 5911
Henderson 07:49:41 -52.7 Dark Up 36.7 237.0 Up 07:34:41 - 08:04:41 5837
Searchlight/Boulder City 07:49:41 -53.3 Dark Up 37.0 237.4 Up 07:34:41 - 08:04:41 5778
Wildwood 07:49:52 -54.8 Dark Up 40.2 234.9 Up 07:34:52 - 08:04:52 5754
Patrick 07:49:38 -53.2 Dark Up 36.3 238.4 Up 07:34:38 - 08:04:38 5741
Laughlin/Bullhead City 07:49:39 -53.5 Dark Up 36.9 237.9 Up 07:34:39 - 08:04:39 5737
Kingman/Dolan Springs 07:49:37 -53.4 Dark Up 36.5 238.4 Up 07:34:37 - 08:04:37 5724
Mohave Valley 07:49:40 -53.8 Dark Up 37.0 238.1 Up 07:34:40 - 08:04:40 5710
DCO 07:49:35 -53.4 Dark Up 35.9 239.2 Up 07:34:35 - 08:04:35 5689
Lake Havasu City 07:49:39 -54.2 Dark Up 37.1 238.6 Up 07:34:39 - 08:04:39 5662
Idyllwild 07:49:47 -55.1 Dark Up 39.1 236.9 Up 07:34:47 - 08:04:47 5659
Parker 07:49:38 -54.5 Dark Up 37.2 238.8 Up 07:34:38 - 08:04:38 5625
Blythe 07:49:40 -55.1 Dark Up 37.7 238.9 Up 07:34:40 - 08:04:40 5581
Calipatria 07:49:43 -55.6 Dark Up 38.6 238.4 Up 07:34:43 - 08:04:43 5560
Yuma 07:49:40 -56.0 Dark Up 38.2 239.5 Up 07:34:40 - 08:04:40 5489

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 470596, (2018/09/20 07:54UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 37.99  36
Tarazed        19:46:15.6 +10:36:48  2.7 25.04  31
21 Aqr         21:25:17.0 -03:33:25  5.5  4.00  21
PPM 181230     21:16:34.5 -00:37:18  8.5  0.57  22
PPM 171511     21:16:02.3 +00:12:03  9.5  0.44  23
PPM 181234     21:17:55.6 -00:12:53 11.1  0.19  23
470596         21:17:20.8 -00:05:16 16.8        23
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:32:32 UT

Marc W. Buie, Southwest Research Institute

RECON