RECON: TNO occultation with 00QL251

Event between 00QL251 and star GA1000:00122638 with event index number of 1063130

Geocentric closest approach at 2021/10/25 06:08:28 UTC

J2000 position of star is 01:21:27.6 +10:00:12
Equinox of date position of star is 01:22:30.5 +10:06:26
Stellar brightness G=14.8, use SENSEUP=128
Star is 60 degrees from the moon. Moon is 82% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 41.1 AU from the Sun and 40.1 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 362 seconds.
The 1-sigma cross-track error in the shadow position is 4061 km.
The sky-plane scale is 29119.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=278.0 km assuming a 5% albedo -- 11.3 sec chord
Diameter=113.5 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 00QL251, (2021/10/25 06:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.5 +16:33:05  0.8 47.66  15
6Bet Ari       01:55:51.0 +20:54:50  2.6 13.43  49
PPM 144653     01:30:11.6 +07:24:22  6.4  3.30  60
PPM 117281     01:23:52.3 +10:28:57  8.0  0.48  60
PPM 144515     01:22:52.9 +09:49:11  9.2  0.31  60
00QL251        01:22:36.5 +10:07:02 14.8        60
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 2.5 sigma about the mid-time.
The median site spacing is 17.7 km RECON observability=1.0 and success probability=10.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 06:08:14 -47.1 Dark Up 48.7 152.8 Up 05:53:14 - 06:23:14 -1665
Clarence Fulton 06:08:00 -47.4 Dark Up 48.2 159.4 Up 05:53:00 - 06:23:00 -1667
Kelowna 06:08:01 -47.7 Dark Up 48.5 159.0 Up 05:53:01 - 06:23:01 -1690
Summerland 06:08:02 -47.8 Dark Up 48.7 158.6 Up 05:53:02 - 06:23:02 -1702
Penticton 06:08:02 -47.9 Dark Up 48.8 158.7 Up 05:53:02 - 06:23:02 -1711
Oliver 06:08:03 -48.2 Dark Up 49.1 158.6 Up 05:53:03 - 06:23:03 -1736
Anarchist Mountain Observatory 06:08:03 -48.4 Dark Up 49.3 158.8 Up 05:53:03 - 06:23:03 -1753
Tonasket 06:08:04 -48.6 Dark Up 49.6 158.6 Up 05:53:04 - 06:23:04 -1774
Okanogan 06:08:05 -48.8 Dark Up 49.9 158.2 Up 05:53:05 - 06:23:05 -1793
Brewster 06:08:06 -49.0 Dark Up 50.1 157.8 Up 05:53:06 - 06:23:06 -1807
Manson/Chelan 06:08:07 -49.0 Dark Up 50.2 157.1 Up 05:53:07 - 06:23:07 -1811
Entiat 06:08:08 -49.2 Dark Up 50.3 156.9 Up 05:53:08 - 06:23:08 -1825
Wenatchee 06:08:09 -49.3 Dark Up 50.6 156.7 Up 05:53:09 - 06:23:09 -1840
Ellensburg 06:08:10 -49.5 Dark Up 50.9 156.2 Up 05:53:10 - 06:23:10 -1863
Yakima 06:08:11 -49.9 Dark Up 51.2 155.9 Up 05:53:11 - 06:23:11 -1893
Toppenish/White Swan 06:08:11 -50.1 Dark Up 51.5 156.1 Up 05:53:11 - 06:23:11 -1914
Goldendale 06:08:14 -50.3 Dark Up 51.9 155.2 Up 05:53:14 - 06:23:14 -1942
The Dalles 06:08:15 -50.3 Dark Up 52.0 154.5 Up 05:53:15 - 06:23:15 -1947
Pasco 06:08:08 -50.7 Dark Up 51.9 157.9 Up 05:53:08 - 06:23:08 -1964
Maupin 06:08:15 -50.7 Dark Up 52.4 154.4 Up 05:53:15 - 06:23:15 -1982
PNWRO 06:08:08 -51.0 Dark Up 52.2 158.2 Up 05:53:08 - 06:23:08 -1990
Sisters 06:08:18 -51.2 Dark Up 53.0 153.2 Up 05:53:18 - 06:23:18 -2032
Redmond 06:08:18 -51.4 Dark Up 53.2 153.8 Up 05:53:18 - 06:23:18 -2047
Bend 06:08:19 -51.5 Dark Up 53.3 153.4 Up 05:53:19 - 06:23:19 -2059
Oregon Observatory 06:08:19 -51.5 Dark Up 53.4 153.1 Up 05:53:19 - 06:23:19 -2068
La Pine/Gilchrist 06:08:20 -51.6 Dark Up 53.6 152.9 Up 05:53:20 - 06:23:20 -2081
North Lake 06:08:19 -52.3 Dark Up 54.2 153.6 Up 05:53:19 - 06:23:19 -2135
Klamath Falls 06:08:24 -52.6 Dark Up 54.8 151.6 Up 05:53:24 - 06:23:24 -2185
Paisley 06:08:19 -52.8 Dark Up 54.8 153.8 Up 05:53:19 - 06:23:19 -2190
Lakeview 06:08:20 -53.3 Dark Up 55.3 153.8 Up 05:53:20 - 06:23:20 -2237
Fall River/Burney 06:08:26 -53.6 Dark Up 56.0 151.4 Up 05:53:26 - 06:23:26 -2291
Cedarville 06:08:21 -53.9 Dark Up 56.0 153.7 Up 05:53:21 - 06:23:21 -2295
Susanville 06:08:25 -54.5 Dark Up 56.8 152.2 Up 05:53:25 - 06:23:25 -2368
Greenville 06:08:26 -54.5 Dark Up 56.9 151.5 Up 05:53:26 - 06:23:26 -2380
Gimple 06:08:26 -54.5 Dark Up 57.0 151.6 Up 05:53:26 - 06:23:26 -2383
Quincy 06:08:26 -54.6 Dark Up 57.1 151.3 Up 05:53:26 - 06:23:26 -2397
Portola 06:08:25 -55.0 Dark Up 57.4 152.0 Up 05:53:25 - 06:23:25 -2423
Reno 06:08:24 -55.5 Dark Up 57.9 152.9 Up 05:53:24 - 06:23:24 -2468
Carson City 06:08:24 -55.8 Dark Up 58.2 152.7 Up 05:53:24 - 06:23:24 -2499
Gardnerville 06:08:25 -56.0 Dark Up 58.4 152.6 Up 05:53:25 - 06:23:25 -2520
Yerington 06:08:23 -56.3 Dark Up 58.6 153.7 Up 05:53:23 - 06:23:23 -2537
Hawthorne 06:08:23 -56.9 Dark Up 59.2 154.3 Up 05:53:23 - 06:23:23 -2595
Lee Vining 06:08:25 -57.0 Dark Up 59.5 153.0 Up 05:53:25 - 06:23:25 -2625
Tonopah 06:08:19 -58.0 Dark Up 60.1 156.5 Up 05:53:19 - 06:23:19 -2685
Bishop 06:08:24 -57.9 Dark Up 60.3 153.9 Up 05:53:24 - 06:23:24 -2702
CPSLO 06:08:36 -58.0 Dark Up 61.2 148.0 Up 05:53:36 - 06:23:36 -2795
Beatty 06:08:20 -59.1 Dark Up 61.3 156.6 Up 05:53:20 - 06:23:20 -2801
Indian Springs 06:08:17 -59.9 Dark Up 61.9 158.5 Up 05:53:17 - 06:23:17 -2868
Niwot 06:07:37 -60.9 Dark Up 59.9 180.5 Up 05:52:37 - 06:22:37 -2920
SwRI 06:07:38 -61.0 Dark Up 60.0 180.3 Up 05:52:38 - 06:22:38 -2927
Henderson 06:08:16 -60.7 Dark Up 62.6 159.5 Up 05:53:16 - 06:23:16 -2941
Wildwood 06:08:31 -60.0 Dark Up 63.1 150.7 Up 05:53:31 - 06:23:31 -2977
Searchlight/Boulder City 06:08:17 -61.1 Dark Up 63.2 159.2 Up 05:53:17 - 06:23:17 -2993
Laughlin/Bullhead City 06:08:16 -61.6 Dark Up 63.5 159.7 Up 05:53:16 - 06:23:16 -3033
Patrick 06:08:14 -61.7 Dark Up 63.5 161.4 Up 05:53:14 - 06:23:14 -3037
Kingman/Dolan Springs 06:08:14 -61.8 Dark Up 63.6 160.9 Up 05:53:14 - 06:23:14 -3050
Mohave Valley 06:08:16 -61.8 Dark Up 63.8 159.6 Up 05:53:16 - 06:23:16 -3057
Idyllwild 06:08:26 -61.4 Dark Up 64.2 154.2 Up 05:53:26 - 06:23:26 -3080
DCO 06:08:12 -62.3 Dark Up 64.0 162.7 Up 05:53:12 - 06:23:12 -3090
Lake Havasu City 06:08:17 -62.2 Dark Up 64.2 159.8 Up 05:53:17 - 06:23:17 -3102
Parker 06:08:17 -62.5 Dark Up 64.6 159.6 Up 05:53:17 - 06:23:17 -3135
Blythe 06:08:19 -62.7 Dark Up 65.0 158.6 Up 05:53:19 - 06:23:19 -3171
Calipatria 06:08:23 -62.5 Dark Up 65.1 156.2 Up 05:53:23 - 06:23:23 -3180
Yuma 06:08:21 -63.4 Dark Up 65.8 157.8 Up 05:53:21 - 06:23:21 -3253
George/Scottsdale 06:08:10 -64.1 Dark Up 65.6 164.8 Up 05:53:10 - 06:23:10 -3264

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 00QL251, (2021/10/25 06:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 47.66  15
6Bet Ari       01:54:38.5 +20:48:27  2.6 13.43  49
PPM 144653     01:29:03.1 +07:17:38  6.4  3.30  60
PPM 117281     01:22:43.3 +10:22:09  8.0  0.48  60
PPM 144515     01:21:44.1 +09:42:21  9.2  0.31  60
00QL251        01:21:27.6 +10:00:12 14.8        60
Positions are for J2000

Event circumstances last updated at 2019/12/01 23:01:12 UT

Marc W. Buie, Southwest Research Institute

RECON