RECON: TNO occultation with 10370

Event between (10370) Hylonome and star UC4-356-154782 with event index number of 130775

Geocentric closest approach at 2018/07/15 04:58:42 UTC

J2000 position of star is 18:36:50.9 -18:55:14
Equinox of date position of star is 18:37:50.7 -18:54:19
Stellar brightness R=14.6
Star is 136 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=22.4

[RECON map]
TNO is 24.0 AU from the Sun and 23.1 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 802 seconds.
The 1-sigma cross-track error in the shadow position is 2739 km.
The sky-plane scale is 16718.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 5.1 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 10370, (2018/07/15 04:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.8 -26:28:18  0.9 30.25 108
Nunki          18:56:24.8 -26:16:20  2.0  8.51 140
PPM 234652     18:32:31.5 -18:23:18  5.0  1.38 135
PPM 234780     18:37:38.2 -18:46:17  8.3  0.15 136
PPM 234789     18:38:00.8 -18:54:10 10.0  0.02 136
10370          18:37:56.3 -18:54:14 14.6       136
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 1.1 sigma about the mid-time.
The median site spacing is 17.2 km RECON observability=0.4 and success probability=0.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:59:52 -8.5 CT Up 16.9 149.7 Really Low 04:44:52 - 05:14:52 7729
Tonasket 04:59:52 -8.7 CT Up 17.1 149.7 Really Low 04:44:52 - 05:14:52 7719
Okanogan 04:59:52 -8.9 CT Up 17.3 149.5 Really Low 04:44:52 - 05:14:52 7704
Brewster 04:59:52 -9.0 CT Up 17.5 149.3 Really Low 04:44:52 - 05:14:52 7692
Manson/Chelan 04:59:52 -9.0 CT Up 17.5 148.9 Really Low 04:44:52 - 05:14:52 7681
Entiat 04:59:52 -9.1 CT Up 17.7 148.8 Really Low 04:44:52 - 05:14:52 7671
Wenatchee 04:59:52 -9.2 CT Up 17.9 148.6 Really Low 04:44:52 - 05:14:52 7659
Ellensburg 04:59:52 -9.4 CT Up 18.1 148.4 Really Low 04:44:52 - 05:14:52 7640
Yakima 04:59:52 -9.7 CT Up 18.5 148.3 Really Low 04:44:52 - 05:14:52 7622
Pasco 04:59:52 -10.6 CT Up 19.3 149.6 Really Low 04:44:52 - 05:14:52 7614
Toppenish/White Swan 04:59:52 -10.0 CT Up 18.7 148.4 Really Low 04:44:52 - 05:14:52 7613
PNWRO 04:59:52 -10.9 CT Up 19.6 149.7 Really Low 04:44:52 - 05:14:52 7604
George/Umatilla 04:59:52 -10.8 CT Up 19.5 149.3 Really Low 04:44:52 - 05:14:52 7598
Goldendale 05:00:04 -10.2 CT Up 19.1 148.0 Really Low 04:45:04 - 05:15:04 7582
The Dalles 05:00:06 -10.2 CT Up 19.1 147.6 Really Low 04:45:06 - 05:15:06 7568
Maupin 05:00:06 -10.5 CT Up 19.5 147.6 Really Low 04:45:06 - 05:15:06 7549
Madras/Culver 05:00:07 -10.9 CT Up 20.0 147.5 Really Low 04:45:07 - 05:15:07 7522
Redmond 05:00:08 -11.1 CT Up 20.2 147.4 Low 04:45:08 - 05:15:08 7504
Sisters 05:00:09 -10.9 CT Up 20.1 147.0 Low 04:45:09 - 05:15:09 7502
Bend 05:00:09 -11.2 CT Up 20.4 147.2 Low 04:45:09 - 05:15:09 7493
Oregon Observatory 05:00:10 -11.3 CT Up 20.5 147.0 Low 04:45:10 - 05:15:10 7483
La Pine/Gilchrist 05:00:11 -11.4 CT Up 20.6 146.9 Low 04:45:11 - 05:15:11 7472
North Lake 05:00:09 -12.0 CT Up 21.2 147.4 Low 04:45:09 - 05:15:09 7454
Paisley 05:00:09 -12.6 AT Up 21.8 147.6 Low 04:45:09 - 05:15:09 7428
Chiloquin 05:00:14 -12.0 CT Up 21.4 146.4 Low 04:45:14 - 05:15:14 7412
Lakeview 05:00:10 -13.0 AT Up 22.3 147.7 Low 04:45:10 - 05:15:10 7403
Klamath Falls 05:00:14 -12.3 AT Up 21.7 146.4 Low 04:45:14 - 05:15:14 7394
Tulelake 05:00:14 -12.6 AT Up 22.1 146.6 Low 04:45:14 - 05:15:14 7382
Cedarville 05:00:11 -13.6 AT Up 22.9 147.7 Low 04:45:11 - 05:15:11 7369
Niwot 04:59:22 -21.6 Dark Down 29.0 162.1 Low 04:44:22 - 05:14:22 7349
Fall River/Burney 05:00:15 -13.3 AT Up 22.9 146.5 Low 04:45:15 - 05:15:15 7333
Susanville 05:00:15 -14.1 AT Up 23.7 147.0 Low 04:45:15 - 05:15:15 7303
Gimple 05:00:15 -14.2 AT Up 23.8 146.8 Low 04:45:15 - 05:15:15 7286
Greenville 05:00:16 -14.2 AT Up 23.8 146.7 Low 04:45:16 - 05:15:16 7285
Quincy 05:00:16 -14.3 AT Up 24.0 146.6 Low 04:45:16 - 05:15:16 7274
Portola 05:00:15 -14.7 AT Up 24.3 147.0 Low 04:45:15 - 05:15:15 7271
Reno 05:00:13 -15.2 AT Up 24.8 147.6 Low 04:45:13 - 05:15:13 7260
Carson City 05:00:14 -15.5 AT Down 25.1 147.5 Low 04:45:14 - 05:15:14 7240
Yerington 05:00:12 -16.0 AT Down 25.5 148.1 Low 04:45:12 - 05:15:12 7233
Gardnerville 05:00:15 -15.7 AT Down 25.3 147.5 Low 04:45:15 - 05:15:15 7226
Hawthorne 05:00:11 -16.6 AT Down 26.1 148.4 Low 04:45:11 - 05:15:11 7209
Tonopah 05:00:07 -17.7 AT Down 27.1 149.7 Low 04:45:07 - 05:15:07 7191
Lee Vining 05:00:14 -16.7 AT Down 26.4 147.8 Low 04:45:14 - 05:15:14 7172
Bishop 05:00:12 -17.6 AT Down 27.2 148.4 Low 04:45:12 - 05:15:12 7141
Beatty 05:00:07 -18.8 Dark Down 28.3 149.8 Low 04:45:07 - 05:15:07 7123
Indian Springs 05:00:04 -19.6 Dark Down 29.0 150.7 Low 04:45:04 - 05:15:04 7109
Lone Pine 05:00:13 -18.3 Dark Down 28.0 148.5 Low 04:45:13 - 05:15:13 7096
Henderson 04:59:52 -20.3 Dark Down 29.7 151.2 Low 04:44:52 - 05:14:52 7083
Patrick 04:59:52 -21.4 Dark Down 30.7 152.2 Up 04:44:52 - 05:14:52 7047
Searchlight/Boulder City 05:00:03 -20.8 Dark Down 30.2 151.2 Up 04:45:03 - 05:15:03 7043
Kingman/Dolan Springs 04:59:52 -21.5 Dark Down 30.8 151.9 Up 04:44:52 - 05:14:52 7032
DCO 04:59:52 -22.0 Dark Down 31.2 152.8 Up 04:44:52 - 05:14:52 7030
Laughlin/Bullhead City 04:59:52 -21.2 Dark Down 30.6 151.4 Up 04:44:52 - 05:14:52 7029
Mohave Valley 04:59:52 -21.4 Dark Down 30.9 151.3 Up 04:44:52 - 05:14:52 7012
CPSLO 05:00:23 -17.8 AT Down 28.0 145.7 Low 04:45:23 - 05:15:23 6993
Lake Havasu City 04:59:52 -21.9 Dark Down 31.3 151.5 Up 04:44:52 - 05:14:52 6987
Parker 04:59:52 -22.1 Dark Down 31.6 151.4 Up 04:44:52 - 05:14:52 6964
Wildwood 05:00:18 -19.8 Dark Down 29.9 147.2 Low 04:45:18 - 05:15:18 6930
Blythe 05:00:05 -22.4 Dark Down 32.0 151.0 Up 04:45:05 - 05:15:05 6923
Idyllwild 05:00:12 -21.1 Dark Down 31.0 148.9 Up 04:45:12 - 05:15:12 6920
Calipatria 05:00:09 -22.3 Dark Down 32.0 149.9 Up 04:45:09 - 05:15:09 6885
Yuma 05:00:06 -23.1 Dark Down 32.8 150.7 Up 04:45:06 - 05:15:06 6861

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 10370, (2018/07/15 04:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 30.25 108
Nunki          18:55:15.9 -26:17:49  2.0  8.51 140
PPM 234652     18:31:26.3 -18:24:10  5.0  1.38 135
PPM 234780     18:36:32.9 -18:47:17  8.3  0.15 136
PPM 234789     18:36:55.5 -18:55:10 10.0  0.02 136
10370          18:36:50.9 -18:55:14 14.6       136
Positions are for J2000

Event circumstances last updated at 2016/12/11 17:30:21 UT

Marc W. Buie, Southwest Research Institute

RECON