RECON: TNO occultation with 447178

Event between (447178) 05RO43 and star GA0720:03732510 with event index number of 1667344

Geocentric closest approach at 2027/03/01 05:21:50 UTC

J2000 position of star is 08:16:40.3 -16:02:32
Equinox of date position of star is 08:17:37.2 -16:06:25
Stellar brightness G=15.8, use SENSEUP=128
Star is 119 degrees from the moon. Moon is 41% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 14.8 AU from the Sun and 14.1 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 7.1 arcsec/hr.
The 1-sigma error in the time of the event is 203 seconds.
The 1-sigma cross-track error in the shadow position is 3978 km.
The sky-plane scale is 10219.6 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=229.1 km assuming a 5% albedo -- 3.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 447178, (2027/03/01 05:22UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:20.9 -16:45:11 -1.5 21.95 131
15Rho Pup      08:08:42.1 -24:23:03  2.8  8.53 114
20 Pup         08:14:34.9 -15:52:18  5.0  0.84 120
PPM 219888     08:17:42.9 -16:24:22  7.7  0.28 119
PPM 219899     08:18:07.6 -16:19:23  8.9  0.20 119
447178         08:17:55.2 -16:07:39 15.8       119
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 6.0 km RECON observability=1.0 and success probability=5.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 05:24:23 -49.5 Dark Down 33.0 192.1 Up 05:09:23 - 05:39:23 5293
SwRI 05:24:23 -49.5 Dark Down 33.1 192.0 Up 05:09:23 - 05:39:23 5283
Clarence Fulton 05:25:22 -35.5 Dark Down 23.6 176.5 Low 05:10:22 - 05:40:22 4873
Kelowna 05:25:22 -35.6 Dark Down 24.0 176.3 Low 05:10:22 - 05:40:22 4851
Penticton 05:25:22 -35.8 Dark Down 24.3 176.2 Low 05:10:22 - 05:40:22 4834
Peachland 05:25:23 -35.5 Dark Down 24.1 176.0 Low 05:10:23 - 05:40:23 4832
Summerland 05:25:22 -35.7 Dark Down 24.3 176.1 Low 05:10:22 - 05:40:22 4831
Anarchist Mountain Observatory 05:25:21 -36.2 Dark Down 24.9 176.4 Low 05:10:21 - 05:40:21 4826
Oliver 05:25:22 -36.0 Dark Down 24.7 176.2 Low 05:10:22 - 05:40:22 4821
Tonasket 05:25:21 -36.3 Dark Down 25.2 176.3 Low 05:10:21 - 05:40:21 4810
Okanogan 05:25:21 -36.4 Dark Down 25.5 176.1 Low 05:10:21 - 05:40:21 4790
Brewster 05:25:20 -36.5 Dark Down 25.8 175.9 Low 05:10:20 - 05:40:20 4768
Manson/Chelan 05:25:20 -36.4 Dark Down 26.0 175.5 Low 05:10:20 - 05:40:20 4741
PNWRO 05:25:15 -38.2 Dark Down 27.9 176.8 Low 05:10:15 - 05:40:15 4736
Pasco 05:25:16 -37.9 Dark Down 27.6 176.6 Low 05:10:16 - 05:40:16 4733
Entiat 05:25:20 -36.5 Dark Down 26.2 175.4 Low 05:10:20 - 05:40:20 4728
Wenatchee 05:25:20 -36.6 Dark Down 26.4 175.3 Low 05:10:20 - 05:40:20 4713
Ellensburg 05:25:21 -36.7 Dark Down 26.8 175.1 Low 05:10:21 - 05:40:21 4684
Toppenish/White Swan 05:25:19 -37.1 Dark Down 27.5 175.2 Low 05:10:19 - 05:40:19 4667
Yakima 05:25:20 -36.9 Dark Down 27.2 175.0 Low 05:10:20 - 05:40:20 4666
George/Scottsdale 05:24:27 -49.4 Dark Down 40.1 184.9 Up 05:09:27 - 05:39:27 4623
Goldendale 05:25:19 -37.2 Dark Down 28.0 174.7 Low 05:10:19 - 05:40:19 4620
DCO 05:24:35 -47.7 Dark Down 38.8 183.2 Up 05:09:35 - 05:39:35 4606
Victoria 05:25:30 -34.3 Dark Down 25.1 172.1 Low 05:10:30 - 05:40:30 4590
The Dalles 05:25:21 -37.1 Dark Down 28.2 174.3 Low 05:10:21 - 05:40:21 4590
Maupin 05:25:20 -37.4 Dark Down 28.6 174.4 Low 05:10:20 - 05:40:20 4578
Patrick 05:24:39 -47.1 Dark Down 38.5 182.4 Up 05:09:39 - 05:39:39 4575
Kingman/Dolan Springs 05:24:37 -47.1 Dark Down 38.7 182.1 Up 05:09:37 - 05:39:37 4552
Redmond 05:25:18 -37.8 Dark Down 29.5 174.2 Low 05:10:18 - 05:40:18 4534
Henderson 05:24:43 -46.0 Dark Down 37.9 181.0 Up 05:09:43 - 05:39:43 4533
Laughlin/Bullhead City 05:24:40 -46.7 Dark Down 38.8 181.5 Up 05:09:40 - 05:39:40 4517
Bend 05:25:18 -37.8 Dark Down 29.7 174.1 Low 05:10:18 - 05:40:18 4516
Indian Springs 05:24:47 -45.3 Dark Down 37.4 180.2 Up 05:09:47 - 05:39:47 4515
Sisters 05:25:19 -37.5 Dark Down 29.4 173.8 Low 05:10:19 - 05:40:19 4512
Searchlight/Boulder City 05:24:42 -46.3 Dark Down 38.5 181.1 Up 05:09:42 - 05:39:42 4510
Mohave Valley 05:24:39 -46.9 Dark Down 39.0 181.5 Up 05:09:39 - 05:39:39 4504
North Lake 05:25:16 -38.5 Dark Down 30.5 174.5 Up 05:10:16 - 05:40:16 4504
Lake Havasu City 05:24:37 -47.2 Dark Down 39.4 181.8 Up 05:09:37 - 05:39:37 4501
Oregon Observatory 05:25:18 -37.8 Dark Down 29.9 173.9 Low 05:10:18 - 05:40:18 4501
Paisley 05:25:14 -39.0 Dark Down 31.1 174.8 Up 05:10:14 - 05:40:14 4500
Tonopah 05:24:55 -43.5 Dark Down 35.9 178.4 Up 05:09:55 - 05:39:55 4489
Lakeview 05:25:12 -39.4 Dark Down 31.6 175.0 Up 05:10:12 - 05:40:12 4489
La Pine/Gilchrist 05:25:18 -37.9 Dark Down 30.1 173.8 Up 05:10:18 - 05:40:18 4488
Parker 05:24:36 -47.4 Dark Down 39.8 181.9 Up 05:09:36 - 05:39:36 4485
Cedarville 05:25:11 -39.8 Dark Down 32.3 175.2 Up 05:10:11 - 05:40:11 4469
Beatty 05:24:51 -44.4 Dark Down 37.0 178.9 Up 05:09:51 - 05:39:51 4462
Blythe 05:24:36 -47.5 Dark Down 40.3 181.5 Up 05:09:36 - 05:39:36 4440
Hawthorne 05:25:00 -42.3 Dark Down 35.4 176.8 Up 05:10:00 - 05:40:00 4422
Yerington 05:25:03 -41.7 Dark Down 34.9 176.2 Up 05:10:03 - 05:40:03 4412
Klamath Falls 05:25:16 -38.4 Dark Down 31.5 173.4 Up 05:10:16 - 05:40:16 4405
Reno 05:25:05 -41.0 Dark Down 34.3 175.4 Up 05:10:05 - 05:40:05 4397
Yuma 05:24:33 -47.9 Dark Down 41.3 181.5 Up 05:09:33 - 05:39:33 4391
Susanville 05:25:10 -40.0 Dark Down 33.4 174.5 Up 05:10:10 - 05:40:10 4387
Carson City 05:25:05 -41.2 Dark Down 34.7 175.4 Up 05:10:05 - 05:40:05 4381
Bishop 05:24:57 -43.0 Dark Down 36.5 177.0 Up 05:09:57 - 05:39:57 4381
Gardnerville 05:25:04 -41.3 Dark Down 34.9 175.5 Up 05:10:04 - 05:40:04 4373
Fall River/Burney 05:25:13 -39.2 Dark Down 32.7 173.8 Up 05:10:13 - 05:40:13 4372
Portola 05:25:08 -40.4 Dark Down 34.0 174.7 Up 05:10:08 - 05:40:08 4370
Lee Vining 05:25:00 -42.2 Dark Down 35.9 176.2 Up 05:10:00 - 05:40:00 4364
Gimple 05:25:10 -40.0 Dark Down 33.6 174.3 Up 05:10:10 - 05:40:10 4361
Greenville 05:25:10 -40.0 Dark Down 33.6 174.2 Up 05:10:10 - 05:40:10 4356
Calipatria 05:24:38 -47.0 Dark Down 40.8 180.3 Up 05:09:38 - 05:39:38 4353
Quincy 05:25:09 -40.1 Dark Down 33.8 174.2 Up 05:10:09 - 05:40:09 4346
Idyllwild 05:24:43 -45.9 Dark Down 40.2 178.9 Up 05:09:43 - 05:39:43 4307
Wildwood 05:24:49 -44.3 Dark Down 39.8 176.5 Up 05:09:49 - 05:39:49 4201
CPSLO 05:24:59 -42.3 Dark Down 38.5 174.1 Up 05:09:59 - 05:39:59 4129

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 447178, (2027/03/01 05:22UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.1 -16:43:23 -1.5 21.95 131
15Rho Pup      08:07:32.5 -24:18:14  2.8  8.53 114
20 Pup         08:13:19.9 -15:47:18  5.0  0.84 120
PPM 219888     08:16:28.1 -16:19:16  7.7  0.28 119
PPM 219899     08:16:52.8 -16:14:16  8.9  0.20 119
447178         08:16:40.3 -16:02:32 15.8       119
Positions are for J2000

Event circumstances last updated at 2020/08/13 21:41:49 UT

Marc W. Buie, Southwest Research Institute

RECON