RECON: TNO occultation with 03HF57

Event between 03HF57 and star UC4-362-069083 with event index number of 123214

Geocentric closest approach at 2018/04/22 09:43:19 UTC

J2000 position of star is 15:09:16.3 -17:42:27
Equinox of date position of star is 15:10:15.2 -17:46:22
Stellar brightness R=15.5, use SENSEUP=128
Star is 114 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=24.0

[RECON map]
TNO is 34.4 AU from the Sun and 33.4 AU from the Earth.
The TNO is moving 22.7 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 362 seconds.
The 1-sigma cross-track error in the shadow position is 5401 km.
The sky-plane scale is 24235.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.3 km assuming a 5% albedo -- 5.0 sec chord
Diameter=46.7 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 03HF57, (2018/04/22 09:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.0 -26:28:16  0.9 20.48 134
27Bet Lib      15:17:59.7 -09:26:58  2.6  8.53 114
21Nu Lib       15:07:39.1 -16:19:36  5.2  1.58 113
PPM 229821     15:10:22.4 -18:05:03  8.5  0.31 114
03HF57         15:10:18.4 -17:46:35 15.5       114
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 2.5 sigma about the mid-time.
The median site spacing is 10.6 km RECON observability=1.0 and success probability=3.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:43:57 -24.4 Dark Down 22.8 190.0 Low 09:28:57 - 09:58:57 3456
Tonasket 09:43:57 -24.6 Dark Down 23.0 190.0 Low 09:28:57 - 09:58:57 3447
Okanogan 09:43:57 -24.9 Dark Down 23.4 189.9 Low 09:28:57 - 09:58:57 3431
Brewster 09:43:57 -25.2 Dark Down 23.7 189.7 Low 09:28:57 - 09:58:57 3417
Manson/Chelan 09:43:57 -25.5 Dark Down 23.9 189.3 Low 09:28:57 - 09:58:57 3403
Entiat 09:43:58 -25.7 Dark Down 24.1 189.2 Low 09:28:58 - 09:58:58 3393
Wenatchee 09:43:57 -26.0 Dark Down 24.4 189.2 Low 09:28:57 - 09:58:57 3381
Ellensburg 09:43:58 -26.4 Dark Down 24.8 189.0 Low 09:28:58 - 09:58:58 3360
Pasco 09:43:53 -26.6 Dark Down 25.4 190.5 Low 09:28:53 - 09:58:53 3350
PNWRO 09:43:52 -26.7 Dark Down 25.6 190.7 Low 09:28:52 - 09:58:52 3343
Yakima 09:43:58 -26.8 Dark Down 25.2 189.0 Low 09:28:58 - 09:58:58 3342
Toppenish/White Swan 09:43:57 -26.9 Dark Down 25.4 189.2 Low 09:28:57 - 09:58:57 3335
George/Umatilla 09:43:54 -27.0 Dark Down 25.8 190.3 Low 09:28:54 - 09:58:54 3331
Goldendale 09:43:57 -27.5 Dark Down 26.0 188.8 Low 09:28:57 - 09:58:57 3303
The Dalles 09:43:58 -27.9 Dark Down 26.3 188.4 Low 09:28:58 - 09:58:58 3287
Maupin 09:43:57 -28.2 Dark Down 26.7 188.5 Low 09:28:57 - 09:58:57 3270
Niwot 09:42:57 -25.3 Dark Down 28.1 205.7 Low 09:27:57 - 09:57:57 3245
Madras/Culver 09:43:58 -28.7 Dark Down 27.2 188.5 Low 09:28:58 - 09:58:58 3244
Redmond 09:43:58 -29.0 Dark Down 27.6 188.5 Low 09:28:58 - 09:58:58 3226
Sisters 09:43:59 -29.1 Dark Down 27.6 188.1 Low 09:28:59 - 09:58:59 3220
Bend 09:43:58 -29.3 Dark Down 27.8 188.4 Low 09:28:58 - 09:58:58 3213
Oregon Observatory 09:43:58 -29.5 Dark Down 28.0 188.2 Low 09:28:58 - 09:58:58 3203
La Pine/Gilchrist 09:43:58 -29.7 Dark Down 28.2 188.2 Low 09:28:58 - 09:58:58 3192
North Lake 09:43:56 -29.8 Dark Down 28.6 188.9 Low 09:28:56 - 09:58:56 3181
Paisley 09:43:54 -30.2 Dark Down 29.1 189.3 Low 09:28:54 - 09:58:54 3160
Lakeview 09:43:52 -30.6 Dark Down 29.6 189.5 Low 09:28:52 - 09:58:52 3138
Chiloquin 09:43:57 -30.8 Dark Down 29.4 187.9 Low 09:28:57 - 09:58:57 3130
Klamath Falls 09:43:57 -31.0 Dark Down 29.7 188.0 Low 09:28:57 - 09:58:57 3114
Cedarville 09:43:51 -31.1 Dark Down 30.2 189.8 Up 09:28:51 - 09:58:51 3107
Tulelake 09:43:56 -31.2 Dark Down 29.9 188.4 Low 09:28:56 - 09:58:56 3105
Fall River/Burney 09:43:55 -31.9 Dark Down 30.8 188.5 Up 09:28:55 - 09:58:55 3059
Susanville 09:43:51 -32.2 Dark Down 31.4 189.4 Up 09:28:51 - 09:58:51 3039
Gimple 09:43:52 -32.5 Dark Down 31.7 189.2 Up 09:28:52 - 09:58:52 3020
Greenville 09:43:52 -32.6 Dark Down 31.7 189.1 Up 09:28:52 - 09:58:52 3019
Portola 09:43:50 -32.7 Dark Down 31.9 189.6 Up 09:28:50 - 09:58:50 3010
Quincy 09:43:52 -32.7 Dark Down 31.9 189.1 Up 09:28:52 - 09:58:52 3007
Reno 09:43:47 -32.6 Dark Down 32.1 190.4 Up 09:28:47 - 09:58:47 3007
Yerington 09:43:44 -32.9 Dark Down 32.6 191.2 Up 09:28:44 - 09:58:44 2988
Carson City 09:43:47 -32.9 Dark Down 32.5 190.4 Up 09:28:47 - 09:58:47 2987
Gardnerville 09:43:46 -33.1 Dark Down 32.7 190.5 Up 09:28:46 - 09:58:46 2974
Hawthorne 09:43:42 -33.0 Dark Down 32.9 191.8 Up 09:28:42 - 09:58:42 2971
Tonopah 09:43:36 -32.8 Dark Down 33.1 193.4 Up 09:28:36 - 09:58:36 2969
Lee Vining 09:43:43 -33.7 Dark Down 33.6 191.3 Up 09:28:43 - 09:58:43 2930
Beatty 09:43:33 -33.6 Dark Down 34.2 194.1 Up 09:28:33 - 09:58:33 2909
Indian Springs 09:43:28 -33.3 Dark Down 34.3 195.4 Up 09:28:28 - 09:58:28 2908
Bishop 09:43:39 -33.9 Dark Down 34.0 192.2 Up 09:28:39 - 09:58:39 2908
Henderson 09:43:25 -33.4 Dark Down 34.7 196.2 Up 09:28:25 - 09:58:25 2887
Lone Pine 09:43:38 -34.4 Dark Down 34.7 192.7 Up 09:28:38 - 09:58:38 2869
Patrick 09:43:20 -33.4 Dark Down 35.0 197.6 Up 09:28:20 - 09:58:20 2868
DCO 09:43:17 -33.3 Dark Down 35.1 198.4 Up 09:28:17 - 09:58:17 2861
Searchlight/Boulder City 09:43:24 -33.9 Dark Down 35.2 196.4 Up 09:28:24 - 09:58:24 2854
Kingman/Dolan Springs 09:43:20 -33.6 Dark Down 35.3 197.4 Up 09:28:20 - 09:58:20 2851
Laughlin/Bullhead City 09:43:21 -33.9 Dark Down 35.4 196.8 Up 09:28:21 - 09:58:21 2841
Mohave Valley 09:43:22 -34.1 Dark Down 35.7 196.9 Up 09:28:22 - 09:58:22 2825
Lake Havasu City 09:43:20 -34.3 Dark Down 36.0 197.3 Up 09:28:20 - 09:58:20 2804
Parker 09:43:19 -34.6 Dark Down 36.3 197.4 Up 09:28:19 - 09:58:19 2782
Blythe 09:43:20 -35.1 Dark Down 36.9 197.1 Up 09:28:20 - 09:58:20 2744
CPSLO 09:43:46 -36.6 Dark Down 36.4 189.9 Up 09:28:46 - 09:58:46 2741
Idyllwild 09:43:28 -36.1 Dark Down 37.3 194.7 Up 09:28:28 - 09:58:28 2717
Wildwood 09:43:36 -36.7 Dark Down 37.3 192.5 Up 09:28:36 - 09:58:36 2704
Calipatria 09:43:23 -36.0 Dark Down 37.6 196.2 Up 09:28:23 - 09:58:23 2697
Yuma 09:43:19 -35.9 Dark Down 37.8 197.3 Up 09:28:19 - 09:58:19 2684

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 03HF57, (2018/04/22 09:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.48 134
27Bet Lib      15:17:00.3 -09:22:59  2.6  8.53 114
21Nu Lib       15:06:37.6 -16:15:25  5.2  1.58 113
PPM 229821     15:09:20.3 -18:00:55  8.5  0.31 114
03HF57         15:09:16.3 -17:42:27 15.5       114
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:40:55 UT

Marc W. Buie, Southwest Research Institute

RECON