RECON: TNO occultation with 14YG50

Event between 14YG50 and star UC4-584-038365 with event index number of 241870

Geocentric closest approach at 2018/03/21 08:59:31 UTC

J2000 position of star is 07:24:39.1 +26:40:04
Equinox of date position of star is 07:25:45.9 +26:37:52
Stellar brightness R=15.8, use SENSEUP=128
Star is 61 degrees from the moon. Moon is 16% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 34.3 AU from the Sun and 34.0 AU from the Earth.
The TNO is moving 6.2 km/sec on the sky relative to the star, or, 0.9 arcsec/hr.
The 1-sigma error in the time of the event is 816 seconds.
The 1-sigma cross-track error in the shadow position is 5493 km.
The sky-plane scale is 24623.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=235.5 km assuming a 5% albedo -- 37.8 sec chord
Diameter=96.1 km assuming a 30% albedo -- 15.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 14YG50, (2018/03/21 09:00UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.7 +27:58:51  1.1  4.78  66
59 Gem         07:25:41.3 +27:36:04  6.0  0.97  61
PPM 097404     07:22:23.0 +26:27:32  8.5  0.78  61
PPM 097493     07:26:53.9 +26:35:27  9.9  0.25  62
PPM 097473     07:25:46.3 +26:38:51 11.4  0.02  61
14YG50         07:25:46.5 +26:37:51 15.8        62
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 24.6 km RECON observability=0.8 and success probability=7.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:44:28 -40.1 Dark Down 26.6 281.0 Low 08:29:28 - 08:59:28 4507
Tonasket 08:44:25 -40.3 Dark Down 26.5 281.1 Low 08:29:25 - 08:59:25 4482
Okanogan 08:44:25 -40.6 Dark Down 26.5 281.1 Low 08:29:25 - 08:59:25 4444
Brewster 08:44:27 -40.9 Dark Down 26.6 281.1 Low 08:29:27 - 08:59:27 4411
Manson/Chelan 08:44:27 -41.2 Dark Down 26.8 281.0 Low 08:29:27 - 08:59:27 4382
Entiat 08:44:28 -41.4 Dark Down 26.8 281.1 Low 08:29:28 - 08:59:28 4357
Wenatchee 08:44:25 -41.7 Dark Down 26.8 281.1 Low 08:29:25 - 08:59:25 4328
Ellensburg 08:44:26 -42.1 Dark Down 26.9 281.2 Low 08:29:26 - 08:59:26 4280
Yakima 08:44:25 -42.5 Dark Down 26.8 281.4 Low 08:29:25 - 08:59:25 4237
Pasco 08:44:16 -42.6 Dark Down 25.8 282.4 Low 08:29:16 - 08:59:16 4231
Toppenish/White Swan 08:44:23 -42.7 Dark Down 26.7 281.6 Low 08:29:23 - 08:59:23 4217
PNWRO 08:44:14 -42.8 Dark Down 25.6 282.7 Low 08:29:14 - 08:59:14 4210
George/Umatilla 08:44:13 -43.0 Dark Down 25.9 282.4 Low 08:29:13 - 08:59:13 4191
Goldendale 08:44:21 -43.3 Dark Down 26.9 281.6 Low 08:29:21 - 08:59:21 4150
The Dalles 08:44:21 -43.6 Dark Down 27.1 281.4 Low 08:29:21 - 08:59:21 4119
Maupin 08:44:20 -44.0 Dark Down 26.9 281.7 Low 08:29:20 - 08:59:20 4076
Madras/Culver 08:44:20 -44.5 Dark Down 26.9 282.0 Low 08:29:20 - 08:59:20 4017
Niwot 08:42:57 -44.2 Dark Down 14.5 292.8 Really Low 08:27:57 - 08:57:57 3985
Redmond 08:44:18 -44.9 Dark Down 26.8 282.1 Low 08:29:18 - 08:59:18 3978
Sisters 08:44:19 -44.9 Dark Down 27.1 281.8 Low 08:29:19 - 08:59:19 3972
Bend 08:44:18 -45.1 Dark Down 26.9 282.1 Low 08:29:18 - 08:59:18 3952
Oregon Observatory 08:44:16 -45.3 Dark Down 26.9 282.1 Low 08:29:16 - 08:59:16 3931
La Pine/Gilchrist 08:44:17 -45.5 Dark Down 26.9 282.2 Low 08:29:17 - 08:59:17 3908
North Lake 08:44:12 -45.8 Dark Down 26.4 282.7 Low 08:29:12 - 08:59:12 3874
Paisley 08:44:09 -46.3 Dark Down 26.1 283.2 Low 08:29:09 - 08:59:09 3822
Chiloquin 08:44:16 -46.6 Dark Down 26.9 282.5 Low 08:29:16 - 08:59:16 3781
Lakeview 08:44:05 -46.8 Dark Down 25.8 283.6 Low 08:29:05 - 08:59:05 3772
Klamath Falls 08:44:14 -47.0 Dark Down 26.8 282.7 Low 08:29:14 - 08:59:14 3746
Tulelake 08:44:12 -47.2 Dark Down 26.5 283.0 Low 08:29:12 - 08:59:12 3723
Cedarville 08:44:02 -47.4 Dark Down 25.5 284.0 Low 08:29:02 - 08:59:02 3706
Fall River/Burney 08:44:13 -48.1 Dark Down 26.3 283.5 Low 08:29:13 - 08:59:13 3628
Susanville 08:44:02 -48.6 Dark Down 25.6 284.2 Low 08:29:02 - 08:59:02 3576
Gimple 08:44:02 -48.9 Dark Down 25.7 284.2 Low 08:29:02 - 08:59:02 3542
Greenville 08:44:04 -48.9 Dark Down 25.8 284.2 Low 08:29:04 - 08:59:04 3540
Quincy 08:44:02 -49.1 Dark Down 25.7 284.3 Low 08:29:02 - 08:59:02 3518
Portola 08:43:59 -49.1 Dark Down 25.3 284.6 Low 08:28:59 - 08:58:59 3515
Reno 08:43:55 -49.3 Dark Down 24.8 285.1 Low 08:28:55 - 08:58:55 3502
Carson City 08:43:54 -49.6 Dark Down 24.7 285.2 Low 08:28:54 - 08:58:54 3464
Yerington 08:43:51 -49.7 Dark Down 24.2 285.6 Low 08:28:51 - 08:58:51 3458
Gardnerville 08:43:55 -49.8 Dark Down 24.6 285.4 Low 08:28:55 - 08:58:55 3439
Hawthorne 08:43:46 -50.0 Dark Down 23.7 286.1 Low 08:28:46 - 08:58:46 3421
Tonopah 08:43:36 -50.1 Dark Down 22.5 287.0 Low 08:28:36 - 08:58:36 3407
Lee Vining 08:43:48 -50.7 Dark Down 23.9 286.1 Low 08:28:48 - 08:58:48 3349
Bishop 08:43:42 -51.1 Dark Down 23.2 286.7 Low 08:28:42 - 08:58:42 3303
Beatty 08:43:33 -51.1 Dark Down 21.8 287.7 Low 08:28:33 - 08:58:33 3296
Indian Springs 08:43:27 -51.1 Dark Down 20.9 288.4 Low 08:28:27 - 08:58:27 3291
Henderson 08:43:23 -51.4 Dark Down 20.2 288.9 Low 08:28:23 - 08:58:23 3254
Lone Pine 08:43:38 -51.7 Dark Down 22.7 287.2 Low 08:28:38 - 08:58:38 3231
Patrick 08:43:16 -51.6 Dark Down 19.2 289.6 Really Low 08:28:16 - 08:58:16 3221
DCO 08:43:12 -51.7 Dark Down 18.5 290.1 Really Low 08:28:12 - 08:58:12 3210
Searchlight/Boulder City 08:43:21 -51.9 Dark Down 20.0 289.1 Really Low 08:28:21 - 08:58:21 3195
Kingman/Dolan Springs 08:43:13 -51.9 Dark Down 19.3 289.6 Really Low 08:28:13 - 08:58:13 3192
Laughlin/Bullhead City 08:43:18 -52.1 Dark Down 19.6 289.4 Really Low 08:28:18 - 08:58:18 3174
Mohave Valley 08:43:16 -52.3 Dark Down 19.5 289.5 Really Low 08:28:16 - 08:58:16 3146
Lake Havasu City 08:43:15 -52.6 Dark Down 19.2 289.7 Really Low 08:28:15 - 08:58:15 3111
Parker 08:43:15 -52.9 Dark Down 19.1 289.8 Really Low 08:28:15 - 08:58:15 3075
CPSLO 08:43:52 -53.6 Dark Down 24.3 286.5 Low 08:28:52 - 08:58:52 3028
Blythe 08:43:18 -53.5 Dark Down 19.1 289.9 Really Low 08:28:18 - 08:58:18 3011
Idyllwild 08:43:28 -54.1 Dark Down 20.8 288.9 Low 08:28:28 - 08:58:28 2962
Wildwood 08:43:38 -54.3 Dark Down 22.4 287.9 Low 08:28:38 - 08:58:38 2950
Calipatria 08:43:21 -54.3 Dark Down 19.7 289.6 Really Low 08:28:21 - 08:58:21 2932
Yuma 08:43:15 -54.4 Dark Down 18.8 290.1 Really Low 08:28:15 - 08:58:15 2912

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 14YG50, (2018/03/21 09:00UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  4.78  66
59 Gem         07:24:33.4 +27:38:16  6.0  0.97  61
PPM 097404     07:21:15.6 +26:29:39  8.5  0.78  61
PPM 097493     07:25:46.5 +26:37:41  9.9  0.25  62
PPM 097473     07:24:38.9 +26:41:04 11.4  0.02  61
14YG50         07:24:39.1 +26:40:04 15.8        61
Positions are for J2000

Event circumstances last updated at 2018/01/16 17:03:32 UT

Marc W. Buie, Southwest Research Institute

RECON