RECON: TNO occultation with 84719

Event between (84719) 02VR128 and star GA1180:00609253 with event index number of 364386

Geocentric closest approach at 2020/10/22 05:03:06 UTC

J2000 position of star is 03:48:31.3 +29:02:24
Equinox of date position of star is 03:49:40.9 +29:05:48
Stellar brightness G=15.6, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=21.0

[RECON map]
TNO is 40.3 AU from the Sun and 39.5 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 205 seconds.
The 1-sigma cross-track error in the shadow position is 2356 km.
The sky-plane scale is 28631.8 km/arcsec.

The TNO has an absolute magnitude Hv=4.9
Diameter=631.0 km assuming a 5% albedo -- 29.4 sec chord
Diameter=257.6 km assuming a 30% albedo -- 12.0 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 84719, (2020/10/22 05:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.0 +16:32:58  0.8 16.60 146
44Zet Per      03:55:26.7 +31:56:37  2.8  3.09 140
PPM 068850     03:53:22.7 +31:13:46  6.3  2.26 139
PPM 092964     03:51:27.3 +29:42:22  7.9  0.70 139
PPM 092942     03:50:42.2 +28:41:50  9.4  0.45 138
PPM 092917     03:49:35.8 +28:50:56 10.5  0.26 138
84719          03:49:48.3 +29:06:09 15.6       138
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 4.4 sigma about the mid-time.
The median site spacing is 17.3 km RECON observability=1.0 and success probability=13.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 05:05:54 -39.6 Dark Down 34.8 84.6 Up 04:50:54 - 05:20:54 -2157
Kelowna 05:05:54 -39.8 Dark Down 35.0 84.9 Up 04:50:54 - 05:20:54 -2166
Penticton 05:05:55 -39.9 Dark Down 34.9 84.6 Up 04:50:55 - 05:20:55 -2186
Okanagan Falls 05:05:56 -40.0 Dark Down 34.8 84.4 Up 04:50:56 - 05:20:56 -2199
Oliver 05:05:57 -40.1 Dark Down 34.8 84.3 Up 04:50:57 - 05:20:57 -2212
Anarchist Mountain Observatory 05:05:57 -40.3 Dark Down 34.9 84.3 Up 04:50:57 - 05:20:57 -2231
Oroville 05:05:57 -40.3 Dark Down 34.9 84.2 Up 04:50:57 - 05:20:57 -2234
Tonasket 05:05:59 -40.5 Dark Down 34.9 84.1 Up 04:50:59 - 05:20:59 -2251
Okanogan 05:06:00 -40.6 Dark Down 34.7 83.7 Up 04:51:00 - 05:21:00 -2271
Brewster 05:06:01 -40.6 Dark Down 34.6 83.4 Up 04:51:01 - 05:21:01 -2284
Manson/Chelan 05:06:02 -40.5 Dark Down 34.3 83.0 Up 04:51:02 - 05:21:02 -2286
Entiat 05:06:03 -40.6 Dark Down 34.2 82.8 Up 04:51:03 - 05:21:03 -2300
Wenatchee 05:06:04 -40.7 Dark Down 34.1 82.6 Up 04:51:04 - 05:21:04 -2315
Ellensburg 05:06:06 -40.8 Dark Down 33.9 82.2 Up 04:51:06 - 05:21:06 -2338
Yakima 05:06:08 -41.0 Dark Down 33.9 81.9 Up 04:51:08 - 05:21:08 -2368
Toppenish/White Swan 05:06:08 -41.3 Dark Down 34.0 81.9 Up 04:51:08 - 05:21:08 -2391
Goldendale 05:06:11 -41.3 Dark Down 33.6 81.2 Up 04:51:11 - 05:21:11 -2417
The Dalles 05:06:12 -41.2 Dark Down 33.3 80.8 Up 04:51:12 - 05:21:12 -2420
Pasco 05:06:07 -42.1 Dark Down 34.8 82.6 Up 04:51:07 - 05:21:07 -2447
Maupin 05:06:13 -41.5 Dark Down 33.3 80.6 Up 04:51:13 - 05:21:13 -2456
George/Umatilla 05:06:08 -42.1 Dark Down 34.6 82.2 Up 04:51:08 - 05:21:08 -2464
PNWRO 05:06:07 -42.3 Dark Down 34.9 82.6 Up 04:51:07 - 05:21:07 -2474
Madras/Culver 05:06:16 -41.8 Dark Up 33.2 80.3 Up 04:51:16 - 05:21:16 -2497
Sisters 05:06:17 -41.7 Dark Up 32.8 79.8 Up 04:51:17 - 05:21:17 -2505
Redmond 05:06:17 -41.9 Dark Up 33.1 80.0 Up 04:51:17 - 05:21:17 -2522
Bend 05:06:17 -41.9 Dark Up 33.0 79.8 Up 04:51:17 - 05:21:17 -2533
Oregon Observatory 05:06:18 -42.0 Dark Up 32.9 79.6 Up 04:51:18 - 05:21:18 -2542
La Pine/Gilchrist 05:06:19 -42.0 Dark Up 32.8 79.4 Up 04:51:19 - 05:21:19 -2555
North Lake 05:06:20 -42.6 Dark Up 33.1 79.5 Up 04:51:20 - 05:21:20 -2613
Chiloquin 05:06:24 -42.3 Dark Up 32.3 78.5 Up 04:51:24 - 05:21:24 -2629
Klamath Falls 05:06:24 -42.6 Dark Up 32.3 78.4 Up 04:51:24 - 05:21:24 -2659
Paisley 05:06:21 -43.1 Dark Up 33.3 79.4 Up 04:51:21 - 05:21:21 -2670
Tulelake 05:06:25 -42.9 Dark Up 32.5 78.4 Up 04:51:25 - 05:21:25 -2692
Lakeview 05:06:23 -43.5 Dark Up 33.4 79.2 Up 04:51:23 - 05:21:23 -2718
Fall River/Burney 05:06:28 -43.4 Dark Up 32.4 77.9 Up 04:51:28 - 05:21:28 -2768
Cedarville 05:06:25 -44.0 Dark Up 33.4 78.9 Up 04:51:25 - 05:21:25 -2778
Susanville 05:06:30 -44.2 Dark Up 32.8 77.9 Up 04:51:30 - 05:21:30 -2849
Greenville 05:06:31 -44.1 Dark Up 32.5 77.6 Up 04:51:31 - 05:21:31 -2860
Gimple 05:06:31 -44.2 Dark Up 32.6 77.6 Up 04:51:31 - 05:21:31 -2863
Quincy 05:06:31 -44.2 Dark Up 32.5 77.4 Up 04:51:31 - 05:21:31 -2876
Portola 05:06:31 -44.6 Dark Up 32.8 77.6 Up 04:51:31 - 05:21:31 -2906
Reno 05:06:31 -45.2 Dark Up 33.2 77.8 Up 04:51:31 - 05:21:31 -2955
Carson City 05:06:32 -45.4 Dark Up 33.2 77.6 Up 04:51:32 - 05:21:32 -2985
Gardnerville 05:06:33 -45.5 Dark Up 33.2 77.4 Up 04:51:33 - 05:21:33 -3008
Yerington 05:06:32 -45.9 Dark Up 33.6 77.8 Up 04:51:32 - 05:21:32 -3028
Hawthorne 05:06:33 -46.5 Dark Up 33.9 77.8 Up 04:51:33 - 05:21:33 -3089
Lee Vining 05:06:35 -46.4 Dark Up 33.4 77.1 Up 04:51:35 - 05:21:35 -3116
Tonopah 05:06:33 -47.7 Dark Up 34.9 78.2 Up 04:51:33 - 05:21:33 -3187
Bishop 05:06:37 -47.2 Dark Up 33.9 77.1 Up 04:51:37 - 05:21:37 -3197
Lone Pine 05:06:38 -47.8 Dark Up 34.0 76.8 Up 04:51:38 - 05:21:38 -3277
CPSLO 05:06:46 -46.5 Dark Up 31.6 74.8 Up 04:51:46 - 05:21:46 -3277
Beatty 05:06:35 -48.6 Dark Up 35.0 77.6 Up 04:51:35 - 05:21:35 -3305
Indian Springs 05:06:35 -49.5 Dark Up 35.8 77.9 Up 04:51:35 - 05:21:35 -3379
Henderson 05:06:35 -50.2 Dark Up 36.3 77.8 Up 04:51:35 - 05:21:35 -3455
Wildwood 05:06:46 -48.5 Dark Up 33.0 74.9 Up 04:51:46 - 05:21:46 -3472
Niwot 05:06:04 -53.8 Dark Down 44.4 86.3 Up 04:51:04 - 05:21:04 -3478
Searchlight/Boulder City 05:06:37 -50.6 Dark Up 36.2 77.4 Up 04:51:37 - 05:21:37 -3508
Laughlin/Bullhead City 05:06:37 -50.9 Dark Up 36.4 77.4 Up 04:51:37 - 05:21:37 -3550
Patrick 05:06:35 -51.3 Dark Up 37.0 77.9 Up 04:51:35 - 05:21:35 -3558
Kingman/Dolan Springs 05:06:36 -51.3 Dark Up 36.8 77.6 Up 04:51:36 - 05:21:36 -3570
Mohave Valley 05:06:38 -51.1 Dark Up 36.3 77.2 Up 04:51:38 - 05:21:38 -3574
Idyllwild 05:06:45 -50.1 Dark Up 34.4 75.5 Up 04:51:45 - 05:21:45 -3586
DCO 05:06:35 -52.0 Dark Up 37.5 78.0 Up 04:51:35 - 05:21:35 -3615
Lake Havasu City 05:06:38 -51.5 Dark Up 36.5 77.0 Up 04:51:38 - 05:21:38 -3621
Parker 05:06:39 -51.7 Dark Up 36.4 76.8 Up 04:51:39 - 05:21:39 -3654
Blythe 05:06:42 -51.7 Dark Up 36.1 76.3 Up 04:51:42 - 05:21:42 -3688
Calipatria 05:06:44 -51.2 Dark Up 35.2 75.6 Up 04:51:44 - 05:21:44 -3692
Yuma 05:06:45 -52.1 Dark Up 35.8 75.6 Up 04:51:45 - 05:21:45 -3770

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 84719, (2020/10/22 05:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 16.60 146
44Zet Per      03:54:07.9 +31:53:01  2.8  3.09 140
PPM 068850     03:52:04.4 +31:10:06  6.3  2.26 139
PPM 092964     03:50:10.0 +29:38:39  7.9  0.70 139
PPM 092942     03:49:25.4 +28:38:06  9.4  0.45 138
PPM 092917     03:48:19.0 +28:47:10 10.5  0.26 138
84719          03:48:31.3 +29:02:24 15.6       138
Positions are for J2000

Event circumstances last updated at 2018/10/27 20:50:30 UT

Marc W. Buie, Southwest Research Institute

RECON