RECON: TNO occultation with 85627

Event between (85627) 98HP151 and star UC4-333-098819 with event index number of 181748

Geocentric closest approach at 2019/02/26 13:06:40 UTC

J2000 position of star is 17:12:48.3 -23:33:36
Equinox of date position of star is 17:13:53.7 -23:34:49
Stellar brightness R=15.2, use SENSEUP=128
Star is 12 degrees from the moon. Moon is 49% illuminated.
TNO apparent brightness V=23.7

[RECON map]
TNO is 41.3 AU from the Sun and 41.5 AU from the Earth.
The TNO is moving 11.4 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 1375 seconds.
The 1-sigma cross-track error in the shadow position is 2770 km.
The sky-plane scale is 30105.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 17.6 sec chord
Diameter=81.5 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 85627, (2019/02/26 13:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.1 -26:28:22  0.9 10.24   9
35Eta Oph      17:11:28.7 -15:44:50  2.6  7.86  10
PPM 266746     17:22:52.2 -24:55:26  6.5  2.43  14
PPM 266547     17:13:33.0 -22:56:49  8.2  0.64  11
PPM 266568     17:14:20.1 -23:30:58  9.3  0.11  12
85627          17:13:58.2 -23:34:54 15.2        12
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 0.7 sigma about the mid-time.
The median site spacing is 7.1 km RECON observability=0.4 and success probability=4.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 13:02:58 -17.6 AT Up 13.9 155.7 Really Low 12:47:58 - 13:17:58 1121
Tonasket 13:02:57 -17.7 AT Up 14.1 155.7 Really Low 12:47:57 - 13:17:57 1111
Okanogan 13:02:55 -17.8 AT Up 14.4 155.5 Really Low 12:47:55 - 13:17:55 1094
Brewster 13:02:53 -18.0 AT Up 14.6 155.3 Really Low 12:47:53 - 13:17:53 1078
Manson/Chelan 13:02:51 -18.3 Dark Up 14.7 154.9 Really Low 12:47:51 - 13:17:51 1061
Entiat 13:02:50 -18.3 Dark Up 14.9 154.8 Really Low 12:47:50 - 13:17:50 1050
Wenatchee 13:02:48 -18.4 Dark Up 15.1 154.7 Really Low 12:47:48 - 13:17:48 1037
Ellensburg 13:02:46 -18.7 Dark Up 15.4 154.5 Really Low 12:47:46 - 13:17:46 1014
Pasco 13:02:53 -17.8 AT Up 16.5 155.7 Really Low 12:47:53 - 13:17:53 1012
PNWRO 13:02:53 -17.6 AT Up 16.7 155.9 Really Low 12:47:53 - 13:17:53 1005
Yakima 13:02:45 -18.7 Dark Up 15.7 154.4 Really Low 12:47:45 - 13:17:45 995
George/Umatilla 13:02:50 -17.9 AT Up 16.7 155.4 Really Low 12:47:50 - 13:17:50 991
Niwot 13:04:17 -7.4 CT Up 25.5 168.6 Low 12:49:17 - 13:19:17 990
Toppenish/White Swan 13:02:45 -18.6 Dark Up 16.0 154.5 Really Low 12:47:45 - 13:17:45 989
Goldendale 13:02:41 -19.0 Dark Up 16.3 154.1 Really Low 12:47:41 - 13:17:41 954
The Dalles 13:02:38 -19.3 Dark Up 16.4 153.7 Really Low 12:47:38 - 13:17:38 935
Maupin 13:02:37 -19.3 Dark Up 16.8 153.7 Really Low 12:47:37 - 13:17:37 917
Madras/Culver 13:02:35 -19.4 Dark Up 17.3 153.6 Really Low 12:47:35 - 13:17:35 890
Redmond 13:02:34 -19.5 Dark Up 17.6 153.5 Really Low 12:47:34 - 13:17:34 871
Sisters 13:02:32 -19.8 Dark Up 17.4 153.1 Really Low 12:47:32 - 13:17:32 862
Bend 13:02:33 -19.6 Dark Up 17.7 153.3 Really Low 12:47:33 - 13:17:33 857
Oregon Observatory 13:02:31 -19.7 Dark Up 17.9 153.2 Really Low 12:47:31 - 13:17:31 845
La Pine/Gilchrist 13:02:31 -19.8 Dark Up 18.0 153.1 Really Low 12:47:31 - 13:17:31 833
North Lake 13:02:34 -19.4 Dark Up 18.6 153.6 Really Low 12:47:34 - 13:17:34 825
Paisley 13:02:34 -19.2 Dark Up 19.2 153.8 Really Low 12:47:34 - 13:17:34 806
Lakeview 13:02:34 -19.1 Dark Up 19.7 153.9 Really Low 12:47:34 - 13:17:34 784
Chiloquin 13:02:25 -20.2 Dark Up 18.9 152.6 Really Low 12:47:25 - 13:17:25 767
Cedarville 13:02:34 -19.0 Dark Up 20.4 154.0 Low 12:47:34 - 13:17:34 753
Klamath Falls 13:02:25 -20.2 Dark Up 19.2 152.6 Really Low 12:47:25 - 13:17:25 751
Tulelake 13:02:26 -20.0 Dark Up 19.6 152.8 Really Low 12:47:26 - 13:17:26 744
Fall River/Burney 13:02:25 -20.0 Dark Up 20.4 152.8 Low 12:47:25 - 13:17:25 697
Susanville 13:02:28 -19.5 Dark Up 21.2 153.3 Low 12:47:28 - 13:17:28 680
Gimple 13:02:26 -19.7 Dark Up 21.4 153.1 Low 12:47:26 - 13:17:26 659
Greenville 13:02:25 -19.8 Dark Up 21.4 153.0 Low 12:47:25 - 13:17:25 657
Reno 13:02:31 -18.9 Dark Up 22.3 154.0 Low 12:47:31 - 13:17:31 652
Portola 13:02:28 -19.4 Dark Up 21.8 153.4 Low 12:47:28 - 13:17:28 651
Quincy 13:02:25 -19.8 Dark Up 21.5 153.0 Low 12:47:25 - 13:17:25 646
Yerington 13:02:35 -18.5 Dark Up 23.0 154.5 Low 12:47:35 - 13:17:35 637
Carson City 13:02:31 -18.9 Dark Up 22.6 153.9 Low 12:47:31 - 13:17:31 632
Tonopah 13:02:46 -16.9 AT Up 24.5 156.2 Low 12:47:46 - 13:17:46 631
Hawthorne 13:02:37 -18.1 Dark Up 23.6 154.9 Low 12:47:37 - 13:17:37 623
Gardnerville 13:02:30 -18.9 Dark Up 22.8 153.9 Low 12:47:30 - 13:17:30 619
Indian Springs 13:02:55 -15.7 AT Up 26.4 157.4 Low 12:47:55 - 13:17:55 580
Lee Vining 13:02:33 -18.5 Dark Up 23.9 154.3 Low 12:47:33 - 13:17:33 578
Beatty 13:02:48 -16.6 AT Up 25.7 156.4 Low 12:47:48 - 13:17:48 573
Henderson 13:02:59 -15.2 AT Up 27.1 158.0 Low 12:47:59 - 13:17:59 564
Bishop 13:02:37 -17.9 AT Up 24.7 154.9 Low 12:47:37 - 13:17:37 561
Patrick 13:03:07 -14.2 AT Up 28.0 159.0 Low 12:48:07 - 13:18:07 552
DCO 13:03:11 -13.6 AT Up 28.5 159.7 Low 12:48:11 - 13:18:11 549
Kingman/Dolan Springs 13:03:05 -14.4 AT Up 28.2 158.8 Low 12:48:05 - 13:18:05 534
Searchlight/Boulder City 13:02:59 -15.1 AT Up 27.6 157.9 Low 12:47:59 - 13:17:59 530
Lone Pine 13:02:37 -17.7 AT Up 25.5 155.1 Low 12:47:37 - 13:17:37 523
Laughlin/Bullhead City 13:03:00 -14.8 AT Up 28.0 158.2 Low 12:48:00 - 13:18:00 520
Mohave Valley 13:03:00 -14.8 AT Up 28.3 158.2 Low 12:48:00 - 13:18:00 504
Lake Havasu City 13:03:02 -14.6 AT Up 28.7 158.4 Low 12:48:02 - 13:18:02 484
Parker 13:03:01 -14.6 AT Up 29.1 158.3 Low 12:48:01 - 13:18:01 463
Blythe 13:02:58 -14.8 AT Up 29.4 157.9 Low 12:47:58 - 13:17:58 423
Idyllwild 13:02:42 -16.6 AT Up 28.6 155.8 Low 12:47:42 - 13:17:42 378
CPSLO 13:02:17 -19.9 Dark Up 25.7 152.3 Low 12:47:17 - 13:17:17 376
Calipatria 13:02:51 -15.6 AT Up 29.6 156.8 Low 12:47:51 - 13:17:51 368
Yuma 13:02:57 -14.9 AT Up 30.3 157.6 Up 12:47:57 - 13:17:57 362
Wildwood 13:02:29 -18.3 Dark Up 27.6 154.0 Low 12:47:29 - 13:17:29 352

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 85627, (2019/02/26 13:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.24   9
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.86  10
PPM 266746     17:21:41.5 -24:54:23  6.5  2.43  14
PPM 266547     17:12:23.4 -22:55:31  8.2  0.64  11
PPM 266568     17:13:10.3 -23:29:41  9.3  0.11  12
85627          17:12:48.3 -23:33:36 15.2        12
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:16:00 UT

Marc W. Buie, Southwest Research Institute

RECON