RECON: TNO occultation with 99CN119

Event between 99CN119 and star GA0980:03619257 with event index number of 1139949

Geocentric closest approach at 2021/04/19 05:24:35 UTC

J2000 position of star is 10:30:54.0 +09:31:33
Equinox of date position of star is 10:31:55.4 +09:25:32
Stellar brightness G=13.9, use SENSEUP=64
Star is 49 degrees from the moon. Moon is 40% illuminated.
TNO apparent brightness V=24.5

[RECON map]
TNO is 43.8 AU from the Sun and 43.2 AU from the Earth.
The TNO is moving 13.7 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 859 seconds.
The 1-sigma cross-track error in the shadow position is 5509 km.
The sky-plane scale is 31361.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.0
Diameter=154.2 km assuming a 5% albedo -- 11.3 sec chord
Diameter=62.9 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 99CN119, (2021/04/19 05:25UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:30.3 +11:51:44  1.3  6.05  43
47Rho Leo      10:33:55.9 +09:11:47  3.8  0.52  49
PPM 127448     10:30:18.8 +10:02:45  7.6  0.76  48
PPM 156932     10:33:15.6 +09:18:43  9.0  0.32  49
PPM 156922     10:32:46.7 +09:32:44 10.5  0.23  49
99CN119        10:32:01.2 +09:24:57 13.9        49
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 1.0 sigma about the mid-time.
The median site spacing is 14.6 km RECON observability=1.0 and success probability=3.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 05:25:22 -20.5 Dark Up 48.5 197.7 Up 05:10:22 - 05:40:22 8561
Summerland 05:25:21 -20.6 Dark Up 48.8 197.3 Up 05:10:21 - 05:40:21 8531
Penticton 05:25:19 -20.7 Dark Up 48.8 197.5 Up 05:10:19 - 05:40:19 8529
Okanagan Falls 05:25:20 -20.8 Dark Up 49.0 197.6 Up 05:10:20 - 05:40:20 8515
Oliver 05:25:18 -20.9 Dark Up 49.2 197.6 Up 05:10:18 - 05:40:18 8503
Anarchist Mountain Observatory 05:25:18 -21.2 Dark Up 49.3 198.0 Up 05:10:18 - 05:40:18 8496
Oroville 05:25:18 -21.2 Dark Up 49.4 197.9 Up 05:10:18 - 05:40:18 8488
Tonasket 05:25:17 -21.4 Dark Up 49.6 198.0 Up 05:10:17 - 05:40:17 8471
Okanogan 05:25:15 -21.5 Dark Up 50.0 197.9 Up 05:10:15 - 05:40:15 8442
Brewster 05:25:15 -21.7 Dark Up 50.3 197.7 Up 05:10:15 - 05:40:15 8416
Manson/Chelan 05:25:17 -21.7 Dark Up 50.5 197.2 Up 05:10:17 - 05:40:17 8390
Entiat 05:25:17 -21.8 Dark Up 50.8 197.2 Up 05:10:17 - 05:40:17 8371
Wenatchee 05:25:16 -21.9 Dark Up 51.0 197.1 Up 05:10:16 - 05:40:16 8348
Ellensburg 05:25:16 -22.2 Dark Up 51.5 196.9 Up 05:10:16 - 05:40:16 8311
Pasco 05:25:06 -23.3 Dark Up 51.9 199.3 Up 05:10:06 - 05:40:06 8294
PNWRO 05:25:06 -23.6 Dark Up 52.1 199.8 Up 05:10:06 - 05:40:06 8281
Yakima 05:25:15 -22.4 Dark Up 51.9 197.0 Up 05:10:15 - 05:40:15 8278
Toppenish/White Swan 05:25:13 -22.7 Dark Up 52.0 197.4 Up 05:10:13 - 05:40:13 8267
George/Umatilla 05:25:06 -23.5 Dark Up 52.2 199.1 Up 05:10:06 - 05:40:06 8261
Niwot 05:23:31 -34.0 Dark Up 51.9 223.6 Up 05:08:31 - 05:38:31 8248
SwRI 05:23:31 -34.1 Dark Up 52.1 223.5 Up 05:08:31 - 05:38:31 8236
Goldendale 05:25:14 -22.9 Dark Up 52.6 196.9 Up 05:10:14 - 05:40:14 8211
The Dalles 05:25:15 -22.9 Dark Up 52.9 196.4 Up 05:10:15 - 05:40:15 8183
Maupin 05:25:13 -23.2 Dark Up 53.3 196.7 Up 05:10:13 - 05:40:13 8152
Madras/Culver 05:25:09 -23.6 Dark Up 53.9 196.8 Up 05:10:09 - 05:40:09 8108
Redmond 05:25:10 -23.9 Dark Up 54.2 196.9 Up 05:10:10 - 05:40:10 8077
Sisters 05:25:12 -23.6 Dark Up 54.3 196.3 Up 05:10:12 - 05:40:12 8067
Bend 05:25:10 -23.9 Dark Up 54.4 196.8 Up 05:10:10 - 05:40:10 8056
Oregon Observatory 05:25:11 -24.0 Dark Up 54.6 196.6 Up 05:10:11 - 05:40:11 8038
La Pine/Gilchrist 05:25:11 -24.1 Dark Up 54.8 196.6 Up 05:10:11 - 05:40:11 8019
North Lake 05:25:05 -24.7 Dark Up 55.1 197.8 Up 05:10:05 - 05:40:05 8002
Paisley 05:25:02 -25.3 Dark Up 55.6 198.6 Up 05:10:02 - 05:40:02 7968
Lakeview 05:25:01 -25.8 Dark Up 56.0 199.2 Up 05:10:01 - 05:40:01 7932
Chiloquin 05:25:08 -24.7 Dark Up 56.0 196.4 Up 05:10:08 - 05:40:08 7917
Klamath Falls 05:25:08 -25.0 Dark Up 56.3 196.7 Up 05:10:08 - 05:40:08 7891
Cedarville 05:24:56 -26.3 Dark Up 56.6 199.7 Up 05:09:56 - 05:39:56 7883
Tulelake 05:25:06 -25.4 Dark Up 56.5 197.4 Up 05:10:06 - 05:40:06 7878
Fall River/Burney 05:25:01 -26.0 Dark Up 57.3 197.9 Up 05:10:01 - 05:40:01 7804
Susanville 05:24:55 -26.9 Dark Up 57.8 199.5 Up 05:09:55 - 05:39:55 7774
Gimple 05:24:55 -27.0 Dark Up 58.1 199.2 Up 05:09:55 - 05:39:55 7744
Greenville 05:24:57 -26.9 Dark Up 58.1 199.1 Up 05:09:57 - 05:39:57 7741
Portola 05:24:52 -27.4 Dark Up 58.3 200.1 Up 05:09:52 - 05:39:52 7729
Reno 05:24:47 -27.9 Dark Up 58.4 201.4 Up 05:09:47 - 05:39:47 7727
Quincy 05:24:55 -27.1 Dark Up 58.3 199.2 Up 05:09:55 - 05:39:55 7724
Yerington 05:24:41 -28.7 Dark Up 58.7 202.9 Up 05:09:41 - 05:39:41 7701
Carson City 05:24:47 -28.2 Dark Up 58.7 201.7 Up 05:09:47 - 05:39:47 7697
Tonopah 05:24:28 -30.4 Dark Up 58.9 206.9 Up 05:09:28 - 05:39:28 7685
Hawthorne 05:24:37 -29.3 Dark Up 59.0 204.1 Up 05:09:37 - 05:39:37 7678
Gardnerville 05:24:45 -28.4 Dark Up 58.9 201.9 Up 05:09:45 - 05:39:45 7678
Lee Vining 05:24:38 -29.4 Dark Up 59.6 203.6 Up 05:09:38 - 05:39:38 7614
Indian Springs 05:24:14 -32.2 Dark Up 59.6 210.8 Up 05:09:14 - 05:39:14 7608
Beatty 05:24:21 -31.4 Dark Up 59.8 208.6 Up 05:09:21 - 05:39:21 7600
Bishop 05:24:32 -30.2 Dark Up 59.9 205.3 Up 05:09:32 - 05:39:32 7586
Henderson 05:24:08 -33.0 Dark Up 59.8 212.4 Up 05:09:08 - 05:39:08 7586
Patrick 05:23:59 -34.1 Dark Up 59.9 214.9 Up 05:08:59 - 05:38:59 7570
DCO 05:23:54 -34.6 Dark Up 59.8 216.4 Up 05:08:54 - 05:38:54 7568
Kingman/Dolan Springs 05:23:59 -34.1 Dark Up 60.1 214.8 Up 05:08:59 - 05:38:59 7544
Searchlight/Boulder City 05:24:04 -33.5 Dark Up 60.3 213.1 Up 05:09:04 - 05:39:04 7538
Lone Pine 05:24:28 -31.0 Dark Up 60.5 206.5 Up 05:09:28 - 05:39:28 7531
Laughlin/Bullhead City 05:24:02 -33.9 Dark Up 60.4 213.9 Up 05:09:02 - 05:39:02 7524
Mohave Valley 05:24:03 -34.1 Dark Up 60.6 214.2 Up 05:09:03 - 05:39:03 7501
Lake Havasu City 05:23:58 -34.5 Dark Up 60.8 215.0 Up 05:08:58 - 05:38:58 7474
Parker 05:23:57 -34.8 Dark Up 61.1 215.4 Up 05:08:57 - 05:38:57 7444
Blythe 05:23:57 -35.0 Dark Up 61.7 215.5 Up 05:08:57 - 05:38:57 7387
CPSLO 05:24:39 -30.4 Dark Up 62.6 202.5 Up 05:09:39 - 05:39:39 7329
Idyllwild 05:24:10 -33.8 Dark Up 62.5 211.5 Up 05:09:10 - 05:39:10 7324
Calipatria 05:24:01 -34.9 Dark Up 62.5 214.3 Up 05:09:01 - 05:39:01 7311
Yuma 05:23:54 -35.7 Dark Up 62.4 216.4 Up 05:08:54 - 05:38:54 7304
Wildwood 05:24:22 -32.5 Dark Up 63.0 207.5 Up 05:09:22 - 05:39:22 7290

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 99CN119, (2021/04/19 05:25UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  6.05  43
47Rho Leo      10:32:48.7 +09:18:24  3.8  0.52  49
PPM 127448     10:29:11.4 +10:09:19  7.6  0.76  48
PPM 156932     10:32:08.4 +09:25:19  9.0  0.32  49
PPM 156922     10:31:39.5 +09:39:20 10.5  0.23  49
99CN119        10:30:54.0 +09:31:33 13.9        49
Positions are for J2000

Event circumstances last updated at 2019/06/08 01:21:00 UT

Marc W. Buie, Southwest Research Institute

RECON