RECON: TNO occultation with 99HS11

Event between 99HS11 and star UC4-377-069038 with event index number of 66134

Geocentric closest approach at 2017/05/31 08:14:01 UTC

J2000 position of star is 14:59:38.9 -14:39:34
Equinox of date position of star is 15:00:36.4 -14:43:39
Stellar brightness R=15.9, use SENSEUP=128
Star is 81 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=23.1

[RECON map]
TNO is 43.5 AU from the Sun and 42.6 AU from the Earth.
The TNO is moving 22.6 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 370 seconds.
The 1-sigma cross-track error in the shadow position is 4896 km.
The sky-plane scale is 30884.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=272.9 km assuming a 5% albedo -- 12.1 sec chord
Diameter=111.4 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 99HS11, (2017/05/31 08:14UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:06.8 -11:15:06  1.0 23.27  58
27Bet Lib      15:17:56.8 -09:26:46  2.6  6.77  84
21Nu Lib       15:07:36.1 -16:19:24  5.2  2.32  83
PPM 229632     15:01:53.5 -15:05:40  8.3  0.48  82
PPM 229614     15:01:11.2 -14:47:49  9.0  0.16  81
99HS11         15:00:36.8 -14:43:41 15.9        81
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 2.4 sigma about the mid-time.
The median site spacing is 11.8 km RECON observability=1.0 and success probability=2.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:13:37 -19.0 Dark Down 21.7 209.3 Low 07:58:37 - 08:28:37 8890
Tonasket 08:13:38 -19.2 Dark Down 21.9 209.4 Low 07:58:38 - 08:28:38 8881
Okanogan 08:13:36 -19.6 Dark Down 22.3 209.3 Low 07:58:36 - 08:28:36 8866
Brewster 08:13:37 -19.8 Dark Down 22.6 209.2 Low 07:58:37 - 08:28:37 8853
Manson/Chelan 08:13:37 -20.1 Dark Up 22.9 208.8 Low 07:58:37 - 08:28:37 8841
Entiat 08:13:37 -20.3 Dark Down 23.1 208.8 Low 07:58:37 - 08:28:37 8831
Wenatchee 08:13:36 -20.6 Dark Down 23.3 208.8 Low 07:58:36 - 08:28:36 8820
Ellensburg 08:13:36 -21.0 Dark Down 23.8 208.6 Low 07:58:36 - 08:28:36 8800
Yakima 08:13:36 -21.4 Dark Down 24.1 208.7 Low 07:58:36 - 08:28:36 8782
Pasco 08:13:31 -21.7 Dark Down 23.9 210.2 Low 07:58:31 - 08:28:31 8779
Toppenish/White Swan 08:13:34 -21.6 Dark Down 24.3 208.9 Low 07:58:34 - 08:28:34 8774
PNWRO 08:13:30 -21.9 Dark Down 24.1 210.5 Low 07:58:30 - 08:28:30 8770
George/Umatilla 08:13:31 -22.0 Dark Down 24.3 210.1 Low 07:58:31 - 08:28:31 8762
Goldendale 08:13:35 -22.2 Dark Down 24.9 208.6 Low 07:58:35 - 08:28:35 8745
The Dalles 08:13:36 -22.4 Dark Down 25.2 208.3 Low 07:58:36 - 08:28:36 8731
Maupin 08:13:35 -22.8 Dark Down 25.5 208.5 Low 07:58:35 - 08:28:35 8713
Madras/Culver 08:13:33 -23.4 Dark Down 26.0 208.6 Low 07:58:33 - 08:28:33 8687
Redmond 08:13:33 -23.7 Dark Down 26.4 208.6 Low 07:58:33 - 08:28:33 8669
Sisters 08:13:34 -23.7 Dark Down 26.5 208.2 Low 07:58:34 - 08:28:34 8666
Bend 08:13:33 -23.9 Dark Down 26.6 208.5 Low 07:58:33 - 08:28:33 8657
Oregon Observatory 08:13:33 -24.1 Dark Down 26.8 208.4 Low 07:58:33 - 08:28:33 8648
La Pine/Gilchrist 08:13:33 -24.3 Dark Down 27.0 208.4 Low 07:58:33 - 08:28:33 8637
North Lake 08:13:30 -24.7 Dark Down 27.2 209.1 Low 07:58:30 - 08:28:30 8621
Paisley 08:13:28 -25.3 Dark Down 27.5 209.6 Low 07:58:28 - 08:28:28 8597
Chiloquin 08:13:32 -25.4 Dark Down 28.1 208.3 Low 07:58:32 - 08:28:32 8577
Lakeview 08:13:26 -25.8 Dark Down 27.9 209.9 Low 07:58:26 - 08:28:26 8572
Klamath Falls 08:13:32 -25.8 Dark Down 28.4 208.5 Low 07:58:32 - 08:28:32 8560
Niwot 08:12:36 -25.6 Dark Down 22.7 224.7 Low 07:57:36 - 08:27:36 8553
Tulelake 08:13:30 -26.0 Dark Down 28.5 208.9 Low 07:58:30 - 08:28:30 8549
Cedarville 08:13:24 -26.4 Dark Down 28.4 210.3 Low 07:58:24 - 08:28:24 8540
Fall River/Burney 08:13:27 -27.0 Dark Down 29.3 209.2 Low 07:58:27 - 08:28:27 8501
Susanville 08:13:23 -27.6 Dark Down 29.6 210.1 Low 07:58:23 - 08:28:23 8475
Gimple 08:13:24 -27.8 Dark Down 29.9 210.0 Low 07:58:24 - 08:28:24 8457
Greenville 08:13:24 -27.8 Dark Down 29.9 209.9 Low 07:58:24 - 08:28:24 8456
Quincy 08:13:23 -28.0 Dark Down 30.1 209.9 Up 07:58:23 - 08:28:23 8445
Portola 08:13:21 -28.1 Dark Down 30.0 210.5 Up 07:58:21 - 08:28:21 8443
Reno 08:13:18 -28.4 Dark Down 30.0 211.2 Low 07:58:18 - 08:28:18 8435
Carson City 08:13:18 -28.7 Dark Down 30.3 211.3 Up 07:58:18 - 08:28:18 8415
Yerington 08:13:15 -28.9 Dark Down 30.2 212.0 Up 07:58:15 - 08:28:15 8409
Gardnerville 08:13:18 -29.0 Dark Down 30.5 211.4 Up 07:58:18 - 08:28:18 8401
Hawthorne 08:13:13 -29.3 Dark Down 30.4 212.7 Up 07:58:13 - 08:28:13 8388
Tonopah 08:13:07 -29.7 Dark Down 30.2 214.2 Up 07:58:07 - 08:28:07 8373
Lee Vining 08:13:12 -29.9 Dark Down 31.1 212.4 Up 07:58:12 - 08:28:12 8351
Bishop 08:13:09 -30.5 Dark Down 31.3 213.3 Up 07:58:09 - 08:28:09 8321
Beatty 08:13:03 -30.8 Dark Down 30.9 215.0 Up 07:58:03 - 08:28:03 8308
Indian Springs 08:12:58 -31.0 Dark Down 30.7 216.2 Up 07:57:58 - 08:27:58 8297
Lone Pine 08:13:06 -31.2 Dark Down 31.8 213.9 Up 07:58:06 - 08:28:06 8278
Henderson 08:12:54 -31.4 Dark Down 30.8 217.1 Up 07:57:54 - 08:27:54 8269
Patrick 08:12:49 -31.9 Dark Down 30.7 218.4 Up 07:57:49 - 08:27:49 8239
Searchlight/Boulder City 08:12:53 -32.0 Dark Down 31.2 217.3 Up 07:57:53 - 08:27:53 8235
DCO 08:12:46 -32.1 Dark Down 30.6 219.1 Up 07:57:46 - 08:27:46 8225
Kingman/Dolan Springs 08:12:49 -32.1 Dark Down 31.0 218.3 Up 07:57:49 - 08:27:49 8224
Laughlin/Bullhead City 08:12:50 -32.2 Dark Down 31.3 217.8 Up 07:57:50 - 08:27:50 8218
Mohave Valley 08:12:51 -32.5 Dark Down 31.5 217.9 Up 07:57:51 - 08:27:51 8201
Lake Havasu City 08:12:49 -32.8 Dark Down 31.7 218.3 Up 07:57:49 - 08:27:49 8177
CPSLO 08:13:13 -32.7 Dark Down 34.0 211.7 Up 07:58:13 - 08:28:13 8171
Parker 08:12:48 -33.2 Dark Down 32.0 218.4 Up 07:57:48 - 08:27:48 8155
Blythe 08:12:47 -33.7 Dark Down 32.5 218.3 Up 07:57:47 - 08:27:47 8119
Wildwood 08:13:03 -33.7 Dark Down 34.1 214.2 Up 07:58:03 - 08:28:03 8115
Idyllwild 08:12:55 -33.9 Dark Down 33.5 216.2 Up 07:57:55 - 08:27:55 8110
Calipatria 08:12:50 -34.4 Dark Down 33.4 217.6 Up 07:57:50 - 08:27:50 8079
Yuma 08:12:45 -34.7 Dark Down 33.3 218.7 Up 07:57:45 - 08:27:45 8058

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 99HS11, (2017/05/31 08:14UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 23.27  58
27Bet Lib      15:17:00.3 -09:22:59  2.6  6.77  84
21Nu Lib       15:06:37.6 -16:15:25  5.2  2.32  83
PPM 229632     15:00:55.6 -15:01:34  8.3  0.48  82
PPM 229614     15:00:13.3 -14:43:43  9.0  0.16  81
99HS11         14:59:38.9 -14:39:34 15.9        81
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:07:24 UT

Marc W. Buie, Southwest Research Institute

RECON