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 13:06:39 UTC

J2000 position of star is 17:12:48.3 -23:33:36
Equinox of date position of star is 17:13:51.7 -23:34:46
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 6.7 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 13:03:00 -17.6 AT Up 13.9 155.7 Really Low 12:48:00 - 13:18:00 1127
Tonasket 13:02:59 -17.7 AT Up 14.1 155.7 Really Low 12:47:59 - 13:17:59 1118
Okanogan 13:02:57 -17.8 AT Up 14.4 155.5 Really Low 12:47:57 - 13:17:57 1100
Brewster 13:02:56 -18.0 AT Up 14.6 155.3 Really Low 12:47:56 - 13:17:56 1085
Manson/Chelan 13:02:53 -18.3 Dark Up 14.7 154.9 Really Low 12:47:53 - 13:17:53 1068
Entiat 13:02:52 -18.3 Dark Up 14.9 154.9 Really Low 12:47:52 - 13:17:52 1057
Wenatchee 13:02:50 -18.4 Dark Up 15.1 154.7 Really Low 12:47:50 - 13:17:50 1044
Ellensburg 13:02:48 -18.7 Dark Up 15.4 154.5 Really Low 12:47:48 - 13:17:48 1021
Pasco 13:02:54 -17.7 AT Up 16.5 155.7 Really Low 12:47:54 - 13:17:54 1018
PNWRO 13:02:55 -17.6 AT Up 16.8 155.9 Really Low 12:47:55 - 13:17:55 1012
Yakima 13:02:47 -18.7 Dark Up 15.7 154.4 Really Low 12:47:47 - 13:17:47 1002
George/Umatilla 13:02:52 -17.9 AT Up 16.7 155.4 Really Low 12:47:52 - 13:17:52 998
Niwot 13:04:20 -7.3 CT Up 25.5 168.6 Low 12:49:20 - 13:19:20 996
Toppenish/White Swan 13:02:46 -18.6 Dark Up 16.0 154.5 Really Low 12:47:46 - 13:17:46 996
Goldendale 13:02:42 -19.0 Dark Up 16.3 154.1 Really Low 12:47:42 - 13:17:42 961
The Dalles 13:02:40 -19.3 Dark Up 16.4 153.7 Really Low 12:47:40 - 13:17:40 941
Maupin 13:02:40 -19.3 Dark Up 16.8 153.7 Really Low 12:47:40 - 13:17:40 924
Madras/Culver 13:02:37 -19.4 Dark Up 17.3 153.6 Really Low 12:47:37 - 13:17:37 897
Redmond 13:02:36 -19.5 Dark Up 17.6 153.5 Really Low 12:47:36 - 13:17:36 878
Sisters 13:02:33 -19.7 Dark Up 17.5 153.1 Really Low 12:47:33 - 13:17:33 870
Bend 13:02:35 -19.6 Dark Up 17.7 153.3 Really Low 12:47:35 - 13:17:35 864
Oregon Observatory 13:02:33 -19.7 Dark Up 17.9 153.2 Really Low 12:47:33 - 13:17:33 853
La Pine/Gilchrist 13:02:32 -19.8 Dark Up 18.0 153.1 Really Low 12:47:32 - 13:17:32 841
North Lake 13:02:35 -19.4 Dark Up 18.6 153.6 Really Low 12:47:35 - 13:17:35 833
Paisley 13:02:36 -19.2 Dark Up 19.2 153.8 Really Low 12:47:36 - 13:17:36 813
Lakeview 13:02:36 -19.1 Dark Up 19.7 153.9 Really Low 12:47:36 - 13:17:36 792
Chiloquin 13:02:28 -20.2 Dark Up 18.9 152.6 Really Low 12:47:28 - 13:17:28 775
Cedarville 13:02:35 -19.0 Dark Up 20.4 154.0 Low 12:47:35 - 13:17:35 761
Klamath Falls 13:02:27 -20.2 Dark Up 19.2 152.6 Really Low 12:47:27 - 13:17:27 759
Tulelake 13:02:28 -20.0 Dark Up 19.6 152.9 Really Low 12:47:28 - 13:17:28 752
Fall River/Burney 13:02:26 -20.0 Dark Up 20.4 152.8 Low 12:47:26 - 13:17:26 704
Susanville 13:02:29 -19.5 Dark Up 21.2 153.3 Low 12:47:29 - 13:17:29 688
Gimple 13:02:28 -19.7 Dark Up 21.4 153.1 Low 12:47:28 - 13:17:28 667
Greenville 13:02:27 -19.8 Dark Up 21.4 153.0 Low 12:47:27 - 13:17:27 666
Reno 13:02:33 -18.9 Dark Up 22.3 154.0 Low 12:47:33 - 13:17:33 660
Portola 13:02:29 -19.4 Dark Up 21.8 153.4 Low 12:47:29 - 13:17:29 659
Quincy 13:02:26 -19.8 Dark Up 21.5 153.0 Low 12:47:26 - 13:17:26 654
Yerington 13:02:36 -18.4 Dark Up 23.0 154.5 Low 12:47:36 - 13:17:36 645
Carson City 13:02:32 -18.9 Dark Up 22.6 153.9 Low 12:47:32 - 13:17:32 640
Tonopah 13:02:49 -16.9 AT Up 24.5 156.2 Low 12:47:49 - 13:17:49 639
Hawthorne 13:02:39 -18.1 Dark Up 23.6 154.9 Low 12:47:39 - 13:17:39 631
Gardnerville 13:02:32 -18.9 Dark Up 22.9 153.9 Low 12:47:32 - 13:17:32 628
Indian Springs 13:02:57 -15.7 AT Up 26.4 157.4 Low 12:47:57 - 13:17:57 587
Lee Vining 13:02:34 -18.5 Dark Up 24.0 154.3 Low 12:47:34 - 13:17:34 587
Beatty 13:02:50 -16.6 AT Up 25.7 156.4 Low 12:47:50 - 13:17:50 581
Henderson 13:03:02 -15.1 AT Up 27.1 158.0 Low 12:48:02 - 13:18:02 571
Bishop 13:02:39 -17.9 AT Up 24.7 154.9 Low 12:47:39 - 13:17:39 569
Patrick 13:03:09 -14.2 AT Up 28.0 159.0 Low 12:48:09 - 13:18:09 559
DCO 13:03:13 -13.6 AT Up 28.5 159.7 Low 12:48:13 - 13:18:13 557
Kingman/Dolan Springs 13:03:07 -14.4 AT Up 28.2 158.8 Low 12:48:07 - 13:18:07 541
Searchlight/Boulder City 13:03:01 -15.1 AT Up 27.6 158.0 Low 12:48:01 - 13:18:01 538
Lone Pine 13:02:40 -17.7 AT Up 25.5 155.1 Low 12:47:40 - 13:17:40 531
Laughlin/Bullhead City 13:03:04 -14.8 AT Up 28.0 158.2 Low 12:48:04 - 13:18:04 527
Mohave Valley 13:03:03 -14.8 AT Up 28.3 158.2 Low 12:48:03 - 13:18:03 510
Lake Havasu City 13:03:04 -14.6 AT Up 28.7 158.4 Low 12:48:04 - 13:18:04 491
Parker 13:03:04 -14.6 AT Up 29.1 158.3 Low 12:48:04 - 13:18:04 470
Blythe 13:03:01 -14.8 AT Up 29.4 157.9 Low 12:48:01 - 13:18:01 429
Idyllwild 13:02:45 -16.6 AT Up 28.6 155.8 Low 12:47:45 - 13:17:45 386
CPSLO 13:02:19 -19.9 Dark Up 25.7 152.3 Low 12:47:19 - 13:17:19 383
Calipatria 13:02:53 -15.6 AT Up 29.6 156.8 Low 12:47:53 - 13:17:53 375
Yuma 13:03:00 -14.8 AT Up 30.3 157.7 Up 12:48:00 - 13:18:00 369
Wildwood 13:02:31 -18.2 Dark Up 27.6 154.0 Low 12:47:31 - 13:17:31 360

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 2017/05/20 18:11:10 UT

Marc W. Buie, Southwest Research Institute

RECON