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 04:59:28 UTC

J2000 position of star is 03:48:31.3 +29:02:24
Equinox of date position of star is 03:49:45.8 +29:06:02
Stellar brightness G=15.6, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=26.1

[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 249 seconds.
The 1-sigma cross-track error in the shadow position is 2690 km.
The sky-plane scale is 28632.0 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=631.0 km assuming a 5% albedo -- 2.8 sec chord
Diameter=257.6 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 84719, (2020/10/22 04:59UT)
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 +28:41:49  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       139
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 3.6 sigma about the mid-time.
The median site spacing is 20.3 km RECON observability=1.0 and success probability=16.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 05:02:26 -37.9 Dark Down 31.7 80.6 Up 04:47:26 - 05:17:26 -497
Clarence Fulton 05:02:16 -39.1 Dark Down 34.5 84.6 Up 04:47:16 - 05:17:16 -517
Peachland 05:02:18 -39.2 Dark Down 34.2 83.9 Up 04:47:18 - 05:17:18 -537
Kelowna 05:02:17 -39.3 Dark Down 34.4 84.2 Up 04:47:17 - 05:17:17 -540
Summerland 05:02:19 -39.3 Dark Down 34.2 83.9 Up 04:47:19 - 05:17:19 -551
Penticton 05:02:19 -39.4 Dark Down 34.3 83.9 Up 04:47:19 - 05:17:19 -560
Oliver 05:02:20 -39.6 Dark Down 34.2 83.7 Up 04:47:20 - 05:17:20 -585
Anarchist Mountain Observatory 05:02:21 -39.8 Dark Down 34.4 83.7 Up 04:47:21 - 05:17:21 -604
Tonasket 05:02:22 -40.0 Dark Down 34.3 83.4 Up 04:47:22 - 05:17:22 -625
Okanogan 05:02:23 -40.1 Dark Down 34.1 83.1 Up 04:47:23 - 05:17:23 -644
Brewster 05:02:25 -40.1 Dark Down 34.0 82.8 Up 04:47:25 - 05:17:25 -657
Manson/Chelan 05:02:26 -40.0 Dark Down 33.7 82.4 Up 04:47:26 - 05:17:26 -659
Entiat 05:02:27 -40.1 Dark Down 33.6 82.2 Up 04:47:27 - 05:17:27 -672
Wenatchee 05:02:28 -40.2 Dark Down 33.5 82.0 Up 04:47:28 - 05:17:28 -688
Ellensburg 05:02:30 -40.3 Dark Down 33.3 81.6 Up 04:47:30 - 05:17:30 -710
Yakima 05:02:31 -40.5 Dark Down 33.3 81.3 Up 04:47:31 - 05:17:31 -740
Toppenish/White Swan 05:02:32 -40.7 Dark Down 33.4 81.3 Up 04:47:32 - 05:17:32 -762
Goldendale 05:02:34 -40.8 Dark Down 33.0 80.6 Up 04:47:34 - 05:17:34 -788
The Dalles 05:02:36 -40.7 Dark Up 32.7 80.3 Up 04:47:36 - 05:17:36 -791
Pasco 05:02:31 -41.5 Dark Down 34.2 82.0 Up 04:47:31 - 05:17:31 -818
Maupin 05:02:37 -41.0 Dark Up 32.7 80.1 Up 04:47:37 - 05:17:37 -827
PNWRO 05:02:31 -41.8 Dark Down 34.3 82.0 Up 04:47:31 - 05:17:31 -846
Sisters 05:02:41 -41.1 Dark Up 32.2 79.2 Up 04:47:41 - 05:17:41 -875
Redmond 05:02:40 -41.4 Dark Up 32.5 79.5 Up 04:47:40 - 05:17:40 -892
Bend 05:02:41 -41.4 Dark Up 32.3 79.2 Up 04:47:41 - 05:17:41 -903
Oregon Observatory 05:02:42 -41.4 Dark Up 32.2 79.1 Up 04:47:42 - 05:17:42 -911
La Pine/Gilchrist 05:02:43 -41.5 Dark Up 32.1 78.9 Up 04:47:43 - 05:17:43 -925
North Lake 05:02:44 -42.0 Dark Up 32.5 79.0 Up 04:47:44 - 05:17:44 -982
Klamath Falls 05:02:48 -42.0 Dark Up 31.7 77.9 Up 04:47:48 - 05:17:48 -1027
Paisley 05:02:45 -42.6 Dark Up 32.7 78.9 Up 04:47:45 - 05:17:45 -1039
Lakeview 05:02:47 -42.9 Dark Up 32.7 78.7 Up 04:47:47 - 05:17:47 -1087
Fall River/Burney 05:02:52 -42.8 Dark Up 31.7 77.4 Up 04:47:52 - 05:17:52 -1136
Cedarville 05:02:49 -43.4 Dark Up 32.7 78.3 Up 04:47:49 - 05:17:49 -1146
Susanville 05:02:53 -43.6 Dark Up 32.1 77.4 Up 04:47:53 - 05:17:53 -1217
Greenville 05:02:54 -43.5 Dark Up 31.8 77.1 Up 04:47:54 - 05:17:54 -1227
Gimple 05:02:55 -43.6 Dark Up 31.9 77.1 Up 04:47:55 - 05:17:55 -1231
Quincy 05:02:55 -43.6 Dark Up 31.8 77.0 Up 04:47:55 - 05:17:55 -1244
Portola 05:02:55 -44.0 Dark Up 32.1 77.1 Up 04:47:55 - 05:17:55 -1274
Reno 05:02:55 -44.6 Dark Up 32.6 77.3 Up 04:47:55 - 05:17:55 -1322
Carson City 05:02:56 -44.7 Dark Up 32.5 77.1 Up 04:47:56 - 05:17:56 -1352
Gardnerville 05:02:57 -44.9 Dark Up 32.5 77.0 Up 04:47:57 - 05:17:57 -1375
Yerington 05:02:56 -45.3 Dark Up 32.9 77.3 Up 04:47:56 - 05:17:56 -1395
Hawthorne 05:02:57 -45.8 Dark Up 33.2 77.3 Up 04:47:57 - 05:17:57 -1456
Lee Vining 05:03:00 -45.8 Dark Up 32.8 76.7 Up 04:48:00 - 05:18:00 -1482
Tonopah 05:02:56 -47.0 Dark Up 34.2 77.7 Up 04:47:56 - 05:17:56 -1554
Bishop 05:03:01 -46.6 Dark Up 33.2 76.7 Up 04:48:01 - 05:18:01 -1564
CPSLO 05:03:10 -45.8 Dark Up 30.9 74.4 Up 04:48:10 - 05:18:10 -1643
Beatty 05:03:00 -47.9 Dark Up 34.3 77.2 Up 04:48:00 - 05:18:00 -1672
Indian Springs 05:02:59 -48.8 Dark Up 35.1 77.5 Up 04:47:59 - 05:17:59 -1746
Henderson 05:03:00 -49.6 Dark Up 35.5 77.4 Up 04:48:00 - 05:18:00 -1822
Wildwood 05:03:11 -47.8 Dark Up 32.2 74.6 Up 04:48:11 - 05:18:11 -1837
Niwot 05:02:29 -53.3 Dark Down 43.7 85.8 Up 04:47:29 - 05:17:29 -1849
SwRI 05:02:29 -53.3 Dark Down 43.6 85.6 Up 04:47:29 - 05:17:29 -1855
Searchlight/Boulder City 05:03:01 -49.9 Dark Up 35.5 77.0 Up 04:48:01 - 05:18:01 -1875
Laughlin/Bullhead City 05:03:02 -50.3 Dark Up 35.7 77.0 Up 04:48:02 - 05:18:02 -1916
Patrick 05:03:00 -50.7 Dark Up 36.3 77.5 Up 04:48:00 - 05:18:00 -1924
Kingman/Dolan Springs 05:03:01 -50.7 Dark Up 36.1 77.2 Up 04:48:01 - 05:18:01 -1936
Mohave Valley 05:03:02 -50.4 Dark Up 35.6 76.8 Up 04:48:02 - 05:18:02 -1941
Idyllwild 05:03:09 -49.4 Dark Up 33.7 75.1 Up 04:48:09 - 05:18:09 -1951
DCO 05:02:59 -51.3 Dark Up 36.8 77.6 Up 04:47:59 - 05:17:59 -1981
Lake Havasu City 05:03:03 -50.8 Dark Up 35.7 76.6 Up 04:48:03 - 05:18:03 -1987
Parker 05:03:04 -51.0 Dark Up 35.7 76.4 Up 04:48:04 - 05:18:04 -2020
Blythe 05:03:06 -51.0 Dark Up 35.3 75.9 Up 04:48:06 - 05:18:06 -2054
Calipatria 05:03:09 -50.5 Dark Up 34.5 75.2 Up 04:48:09 - 05:18:09 -2058
Yuma 05:03:09 -51.4 Dark Up 35.1 75.3 Up 04:48:09 - 05:18:09 -2136
George/Scottsdale 05:03:00 -53.0 Dark Up 37.5 77.1 Up 04:48:00 - 05:18:00 -2162

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 04:59UT)
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 +28:38:05  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 2020/02/24 21:41:47 UT

Marc W. Buie, Southwest Research Institute

RECON