RECON: TNO occultation with 508770

Event between (508770) 95WY2 and star GA1120:02650423 with event index number of 249922

Geocentric closest approach at 2020/02/06 01:44:52 UTC

J2000 position of star is 07:06:58.6 +23:19:14
Equinox of date position of star is 07:08:09.1 +23:17:20
Stellar brightness G=15.5, use SENSEUP=128
Star is 12 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=23.7

[RECON map]
TNO is 44.9 AU from the Sun and 44.1 AU from the Earth.
The TNO is moving 21.5 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 702 seconds.
The 1-sigma cross-track error in the shadow position is 4953 km.
The sky-plane scale is 31974.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.6 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 508770, (2020/02/06 01:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:32.6 +27:58:34  1.1  9.83  21
Alhena         06:38:52.4 +16:22:50  1.9  9.76   8
44 Gem         07:06:30.9 +22:36:20  5.9  0.78  11
PPM 097045     07:08:30.3 +24:08:09  8.4  0.85  12
PPM 097038     07:07:59.1 +23:12:03  9.8  0.10  12
508770         07:08:11.5 +23:17:17 15.5        12
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 1.3 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 01:48:01 -8.3 NT Up 34.6 94.1 Up 01:33:01 - 02:03:01 -3791
Summerland 01:48:03 -8.1 NT Up 34.4 93.7 Up 01:33:03 - 02:03:03 -3811
Penticton 01:48:02 -8.1 NT Up 34.5 93.7 Up 01:33:02 - 02:03:02 -3820
Okanagan Falls 01:48:03 -8.1 NT Up 34.5 93.6 Up 01:33:03 - 02:03:03 -3836
Oliver 01:48:04 -8.1 NT Up 34.5 93.5 Up 01:33:04 - 02:03:04 -3851
Anarchist Mountain Observatory 01:48:04 -8.1 NT Up 34.6 93.5 Up 01:33:04 - 02:03:04 -3871
Oroville 01:48:04 -8.1 NT Up 34.6 93.4 Up 01:33:04 - 02:03:04 -3876
Tonasket 01:48:05 -8.0 NT Up 34.6 93.3 Up 01:33:05 - 02:03:05 -3897
Okanogan 01:48:06 -7.8 NT Up 34.5 92.9 Up 01:33:06 - 02:03:06 -3924
Brewster 01:48:07 -7.6 NT Up 34.4 92.6 Up 01:33:07 - 02:03:07 -3944
Manson/Chelan 01:48:08 -7.4 NT Up 34.2 92.2 Up 01:33:08 - 02:03:08 -3955
Entiat 01:48:09 -7.2 NT Up 34.1 92.0 Up 01:33:09 - 02:03:09 -3973
Wenatchee 01:48:10 -7.1 NT Up 34.1 91.7 Up 01:33:10 - 02:03:10 -3994
Ellensburg 01:48:11 -6.9 NT Up 34.0 91.3 Up 01:33:11 - 02:03:11 -4026
Yakima 01:48:13 -6.7 NT Up 34.0 91.0 Up 01:33:13 - 02:03:13 -4063
Toppenish/White Swan 01:48:12 -6.8 NT Up 34.1 91.0 Up 01:33:12 - 02:03:12 -4087
Pasco 01:48:11 -7.6 NT Up 35.0 91.8 Up 01:33:11 - 02:03:11 -4128
Goldendale 01:48:15 -6.4 NT Up 33.8 90.3 Up 01:33:15 - 02:03:15 -4128
The Dalles 01:48:16 -6.1 NT Up 33.5 89.9 Up 01:33:16 - 02:03:16 -4140
George/Umatilla 01:48:13 -7.4 NT Up 34.8 91.4 Up 01:33:13 - 02:03:13 -4154
PNWRO 01:48:12 -7.7 NT Up 35.1 91.8 Up 01:33:12 - 02:03:12 -4156
Maupin 01:48:18 -6.0 NT Up 33.6 89.7 Up 01:33:18 - 02:03:18 -4181
Madras/Culver 01:48:19 -5.8 CT Up 33.6 89.3 Up 01:33:19 - 02:03:19 -4231
Sisters 01:48:21 -5.4 CT Up 33.3 88.8 Up 01:33:21 - 02:03:21 -4251
Redmond 01:48:21 -5.7 CT Up 33.5 89.0 Up 01:33:21 - 02:03:21 -4263
Bend 01:48:21 -5.6 CT Up 33.4 88.8 Up 01:33:21 - 02:03:21 -4280
Oregon Observatory 01:48:21 -5.4 CT Up 33.3 88.6 Up 01:33:21 - 02:03:21 -4293
La Pine/Gilchrist 01:48:22 -5.3 CT Up 33.3 88.4 Up 01:33:22 - 02:03:22 -4310
North Lake 01:48:22 -5.6 CT Up 33.7 88.5 Up 01:33:22 - 02:03:22 -4367
Chiloquin 01:48:26 -4.8 CT Up 33.0 87.5 Up 01:33:26 - 02:03:26 -4406
Paisley 01:48:24 -5.7 CT Up 34.0 88.4 Up 01:33:24 - 02:03:24 -4428
Klamath Falls 01:48:27 -4.7 CT Up 33.1 87.3 Up 01:33:27 - 02:03:27 -4441
Tulelake 01:48:27 -4.8 CT Up 33.3 87.3 Up 01:33:27 - 02:03:27 -4474
Lakeview 01:48:24 -5.7 CT Up 34.1 88.2 Up 01:33:24 - 02:03:24 -4481
Cedarville 01:48:26 -5.7 CT Up 34.2 87.9 Up 01:33:26 - 02:03:26 -4548
Fall River/Burney 01:48:29 -4.6 CT Up 33.3 86.8 Up 01:33:29 - 02:03:29 -4563
Susanville 01:48:30 -5.0 CT Up 33.8 86.8 Up 01:33:30 - 02:03:30 -4643
Greenville 01:48:30 -4.7 CT Up 33.6 86.5 Up 01:33:30 - 02:03:30 -4662
Gimple 01:48:31 -4.8 CT Up 33.6 86.5 Up 01:33:31 - 02:03:31 -4665
Quincy 01:48:31 -4.7 CT Up 33.6 86.3 Up 01:33:31 - 02:03:31 -4682
Portola 01:48:31 -5.0 CT Up 33.9 86.5 Up 01:33:31 - 02:03:31 -4707
Reno 01:48:30 -5.4 CT Up 34.4 86.8 Up 01:33:30 - 02:03:30 -4750
Carson City 01:48:31 -5.3 CT Up 34.4 86.5 Up 01:33:31 - 02:03:31 -4785
Gardnerville 01:48:31 -5.3 CT Up 34.4 86.4 Up 01:33:31 - 02:03:31 -4811
Yerington 01:48:31 -5.7 CT Up 34.9 86.8 Up 01:33:31 - 02:03:31 -4821
Hawthorne 01:48:30 -6.0 CT Up 35.3 86.8 Up 01:33:30 - 02:03:30 -4881
Lee Vining 01:48:33 -5.5 CT Up 34.9 86.1 Up 01:33:33 - 02:03:33 -4924
Tonopah 01:48:28 -6.9 NT Up 36.4 87.2 Up 01:33:28 - 02:03:28 -4963
Bishop 01:48:32 -5.9 CT Up 35.4 86.1 Up 01:33:32 - 02:03:32 -5002
Niwot 01:47:56 -16.4 AT Up 45.5 96.8 Up 01:32:56 - 02:02:56 -5025
SwRI 01:47:56 -16.3 AT Up 45.5 96.7 Up 01:32:56 - 02:02:56 -5033
Lone Pine 01:48:34 -5.9 CT Up 35.6 85.7 Up 01:33:34 - 02:03:34 -5087
Beatty 01:48:30 -7.0 NT Up 36.7 86.7 Up 01:33:30 - 02:03:30 -5091
CPSLO 01:48:42 -3.6 CT Up 33.4 83.5 Up 01:33:42 - 02:03:42 -5147
Indian Springs 01:48:28 -7.7 NT Up 37.5 87.0 Up 01:33:28 - 02:03:28 -5151
Henderson 01:48:28 -8.2 NT Up 38.0 87.0 Up 01:33:28 - 02:03:28 -5222
Searchlight/Boulder City 01:48:29 -8.1 NT Up 38.1 86.6 Up 01:33:29 - 02:03:29 -5282
Patrick 01:48:27 -8.9 NT Up 38.9 87.1 Up 01:33:27 - 02:03:27 -5314
Laughlin/Bullhead City 01:48:28 -8.3 NT Up 38.3 86.5 Up 01:33:28 - 02:03:28 -5322
Wildwood 01:48:40 -4.8 CT Up 35.0 83.7 Up 01:33:40 - 02:03:40 -5325
Kingman/Dolan Springs 01:48:28 -8.7 NT Up 38.7 86.8 Up 01:33:28 - 02:03:28 -5332
Mohave Valley 01:48:30 -8.2 NT Up 38.3 86.3 Up 01:33:30 - 02:03:30 -5350
DCO 01:48:25 -9.4 NT Up 39.5 87.2 Up 01:33:25 - 02:03:25 -5363
Lake Havasu City 01:48:30 -8.3 NT Up 38.5 86.1 Up 01:33:30 - 02:03:30 -5397
Idyllwild 01:48:36 -6.2 NT Up 36.5 84.4 Up 01:33:36 - 02:03:36 -5413
Parker 01:48:30 -8.3 NT Up 38.5 85.9 Up 01:33:30 - 02:03:30 -5434
Blythe 01:48:32 -7.9 NT Up 38.2 85.3 Up 01:33:32 - 02:03:32 -5480
Calipatria 01:48:35 -7.0 NT Up 37.4 84.5 Up 01:33:35 - 02:03:35 -5507
Yuma 01:48:34 -7.7 NT Up 38.1 84.6 Up 01:33:34 - 02:03:34 -5574

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 508770, (2020/02/06 01:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1  9.83  21
Alhena         06:37:42.8 +16:23:57  1.9  9.76   8
44 Gem         07:05:18.4 +22:38:15  5.9  0.78  11
PPM 097045     07:07:16.9 +24:10:06  8.4  0.85  12
PPM 097038     07:06:46.3 +23:14:00  9.8  0.10  12
508770         07:06:58.6 +23:19:14 15.5        12
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:14:37 UT

Marc W. Buie, Southwest Research Institute

RECON