RECON: TNO occultation with 03YR179

Event between 03YR179 and star GA1100:03149035 with event index number of 250521

Geocentric closest approach at 2020/03/16 09:19:48 UTC

J2000 position of star is 09:03:26.7 +21:49:11
Equinox of date position of star is 09:04:31.5 +21:44:39
Stellar brightness G=14.3, use SENSEUP=64
Star is 134 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 41.1 AU from the Sun and 40.4 AU from the Earth.
The TNO is moving 17.2 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 596 seconds.
The 1-sigma cross-track error in the shadow position is 5270 km.
The sky-plane scale is 29319.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=207.0 km assuming a 5% albedo -- 12.0 sec chord
Diameter=84.5 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03YR179, (2020/03/16 09:20UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.8 +11:52:04  1.3 18.37 116
77Xi Cnc       09:10:31.0 +21:57:45  5.1  1.39 133
PPM 099290     09:06:09.8 +22:45:06  7.9  1.08 134
PPM 099263     09:03:54.7 +21:26:19  8.8  0.34 134
PPM 099260     09:03:46.2 +21:53:15 11.2  0.24 134
03YR179        09:04:36.3 +21:44:19 14.3       134
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 1.5 sigma about the mid-time.
The median site spacing is 13.1 km RECON observability=1.0 and success probability=5.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:17:21 -39.3 Dark Down 36.6 260.6 Up 09:02:21 - 09:32:21 -2384
Summerland 09:17:21 -39.4 Dark Down 36.9 260.3 Up 09:02:21 - 09:32:21 -2398
Penticton 09:17:20 -39.6 Dark Down 36.8 260.7 Up 09:02:20 - 09:32:20 -2413
Okanagan Falls 09:17:19 -39.8 Dark Down 36.8 260.8 Up 09:02:19 - 09:32:19 -2426
Oliver 09:17:18 -40.0 Dark Down 36.9 260.9 Up 09:02:18 - 09:32:18 -2436
Anarchist Mountain Observatory 09:17:16 -40.1 Dark Down 36.8 261.2 Up 09:02:16 - 09:32:16 -2442
Oroville 09:17:16 -40.2 Dark Down 36.8 261.2 Up 09:02:16 - 09:32:16 -2449
Tonasket 09:17:15 -40.4 Dark Down 36.9 261.4 Up 09:02:15 - 09:32:15 -2464
Okanogan 09:17:13 -40.7 Dark Down 37.0 261.5 Up 09:02:13 - 09:32:13 -2491
Brewster 09:17:13 -41.0 Dark Down 37.2 261.6 Up 09:02:13 - 09:32:13 -2516
Manson/Chelan 09:17:12 -41.3 Dark Down 37.5 261.4 Up 09:02:12 - 09:32:12 -2542
Entiat 09:17:12 -41.5 Dark Down 37.5 261.5 Up 09:02:12 - 09:32:12 -2559
Niwot 09:16:11 -41.8 Dark Up 27.0 276.7 Low 09:01:11 - 09:31:11 -2570
Wenatchee 09:17:10 -41.8 Dark Down 37.7 261.6 Up 09:02:10 - 09:32:10 -2580
Ellensburg 09:17:09 -42.3 Dark Down 37.9 261.8 Up 09:02:09 - 09:32:09 -2615
Pasco 09:17:02 -42.5 Dark Down 37.0 263.4 Up 09:02:02 - 09:32:02 -2620
PNWRO 09:17:01 -42.7 Dark Down 36.9 263.8 Up 09:02:01 - 09:32:01 -2630
Yakima 09:17:07 -42.6 Dark Down 37.9 262.0 Up 09:02:07 - 09:32:07 -2644
George/Umatilla 09:17:01 -42.9 Dark Down 37.2 263.5 Up 09:02:01 - 09:32:01 -2651
Toppenish/White Swan 09:17:05 -42.8 Dark Down 37.9 262.3 Up 09:02:05 - 09:32:05 -2654
Goldendale 09:17:04 -43.4 Dark Down 38.2 262.4 Up 09:02:04 - 09:32:04 -2707
The Dalles 09:17:03 -43.7 Dark Down 38.5 262.3 Up 09:02:03 - 09:32:03 -2735
Maupin 09:17:01 -44.1 Dark Down 38.5 262.7 Up 09:02:01 - 09:32:01 -2761
Madras/Culver 09:16:58 -44.6 Dark Down 38.6 263.1 Up 09:01:58 - 09:31:58 -2802
Redmond 09:16:57 -44.9 Dark Down 38.7 263.4 Up 09:01:57 - 09:31:57 -2830
Sisters 09:16:58 -45.0 Dark Down 39.0 263.0 Up 09:01:58 - 09:31:58 -2842
Bend 09:16:56 -45.2 Dark Down 38.8 263.4 Up 09:01:56 - 09:31:56 -2850
Oregon Observatory 09:16:56 -45.4 Dark Down 38.9 263.5 Up 09:01:56 - 09:31:56 -2868
La Pine/Gilchrist 09:16:55 -45.6 Dark Down 39.0 263.6 Up 09:01:55 - 09:31:55 -2885
North Lake 09:16:52 -45.8 Dark Down 38.6 264.4 Up 09:01:52 - 09:31:52 -2896
Paisley 09:16:48 -46.2 Dark Down 38.4 265.1 Up 09:01:48 - 09:31:48 -2925
Lakeview 09:16:46 -46.6 Dark Down 38.3 265.6 Up 09:01:46 - 09:31:46 -2956
Chiloquin 09:16:51 -46.7 Dark Down 39.4 264.2 Up 09:01:51 - 09:31:51 -2980
Cedarville 09:16:42 -47.2 Dark Down 38.3 266.2 Up 09:01:42 - 09:31:42 -3000
Klamath Falls 09:16:49 -47.0 Dark Down 39.4 264.5 Up 09:01:49 - 09:31:49 -3003
Tulelake 09:16:47 -47.2 Dark Down 39.2 265.0 Up 09:01:47 - 09:31:47 -3013
Fall River/Burney 09:16:43 -48.0 Dark Down 39.2 265.7 Up 09:01:43 - 09:31:43 -3080
Susanville 09:16:38 -48.3 Dark Down 38.7 266.8 Up 09:01:38 - 09:31:38 -3102
Gimple 09:16:36 -48.7 Dark Down 38.9 266.8 Up 09:01:36 - 09:31:36 -3131
Greenville 09:16:37 -48.7 Dark Down 38.9 266.8 Up 09:01:37 - 09:31:37 -3134
Reno 09:16:32 -48.9 Dark Down 38.1 268.0 Up 09:01:32 - 09:31:32 -3139
Portola 09:16:35 -48.8 Dark Down 38.6 267.4 Up 09:01:35 - 09:31:35 -3142
Quincy 09:16:37 -48.9 Dark Down 39.0 266.9 Up 09:01:37 - 09:31:37 -3150
Yerington 09:16:28 -49.1 Dark Down 37.6 268.8 Up 09:01:28 - 09:31:28 -3158
Tonopah 09:16:20 -49.2 Dark Up 36.1 270.7 Up 09:01:20 - 09:31:20 -3159
Carson City 09:16:30 -49.2 Dark Down 38.1 268.3 Up 09:01:30 - 09:31:30 -3166
Hawthorne 09:16:25 -49.3 Dark Down 37.2 269.5 Up 09:01:25 - 09:31:25 -3175
Gardnerville 09:16:29 -49.4 Dark Down 38.1 268.5 Up 09:01:29 - 09:31:29 -3184
Indian Springs 09:16:10 -49.8 Dark Up 34.9 272.7 Up 09:01:10 - 09:31:10 -3218
Beatty 09:16:13 -50.0 Dark Up 35.8 271.8 Up 09:01:13 - 09:31:13 -3233
Henderson 09:16:06 -49.9 Dark Up 34.3 273.4 Up 09:01:06 - 09:31:06 -3234
Lee Vining 09:16:23 -50.0 Dark Down 37.6 269.6 Up 09:01:23 - 09:31:23 -3238
DCO 09:15:58 -49.8 Dark Up 32.8 275.0 Up 09:00:58 - 09:30:58 -3238
Patrick 09:16:02 -49.9 Dark Up 33.4 274.4 Up 09:01:02 - 09:31:02 -3241
Bishop 09:16:19 -50.3 Dark Up 37.1 270.5 Up 09:01:19 - 09:31:19 -3258
Kingman/Dolan Springs 09:16:00 -50.2 Dark Up 33.5 274.5 Up 09:01:00 - 09:31:00 -3266
Searchlight/Boulder City 09:16:03 -50.4 Dark Up 34.3 273.8 Up 09:01:03 - 09:31:03 -3277
Laughlin/Bullhead City 09:16:01 -50.4 Dark Up 34.0 274.2 Up 09:01:01 - 09:31:01 -3288
Lone Pine 09:16:15 -50.8 Dark Up 36.8 271.3 Up 09:01:15 - 09:31:15 -3306
Mohave Valley 09:16:00 -50.7 Dark Up 33.9 274.4 Up 09:01:00 - 09:31:00 -3309
Lake Havasu City 09:15:58 -50.9 Dark Up 33.7 274.8 Up 09:00:58 - 09:30:58 -3332
Parker 09:15:56 -51.1 Dark Up 33.7 275.0 Up 09:00:56 - 09:30:56 -3359
Blythe 09:15:55 -51.7 Dark Up 33.9 275.2 Up 09:00:55 - 09:30:55 -3414
Idyllwild 09:16:00 -52.6 Dark Up 35.6 274.1 Up 09:01:00 - 09:31:00 -3488
Calipatria 09:15:55 -52.6 Dark Up 34.6 275.1 Up 09:00:55 - 09:30:55 -3491
Yuma 09:15:51 -52.5 Dark Up 33.8 275.8 Up 09:00:51 - 09:30:51 -3491
CPSLO 09:16:15 -53.0 Dark Down 38.9 270.8 Up 09:01:15 - 09:31:15 -3512
Wildwood 09:16:06 -53.2 Dark Up 37.2 272.9 Up 09:01:06 - 09:31:06 -3532

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 03YR179, (2020/03/16 09:20UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 18.37 116
77Xi Cnc       09:09:21.5 +22:02:44  5.1  1.39 133
PPM 099290     09:04:59.8 +22:49:59  7.9  1.08 134
PPM 099263     09:02:45.1 +21:31:09  8.8  0.34 134
PPM 099260     09:02:36.5 +21:58:05 11.2  0.24 134
03YR179        09:03:26.7 +21:49:11 14.3       134
Positions are for J2000

Event circumstances last updated at 2018/10/26 20:50:28 UT

Marc W. Buie, Southwest Research Institute

RECON