RECON: TNO occultation with 10TV191

Event between 10TV191 and star GA1020:00910227 with event index number of 1499269

Geocentric closest approach at 2026/02/04 06:29:29 UTC

J2000 position of star is 05:36:24.8 +12:36:04
Equinox of date position of star is 05:37:30.4 +12:36:43
Stellar brightness G=15.6, use SENSEUP=128
Star is 81 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 27.6 AU from the Sun and 27.0 AU from the Earth.
The TNO is moving 14.5 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 805 seconds.
The 1-sigma cross-track error in the shadow position is 5338 km.
The sky-plane scale is 19600.1 km/arcsec.

The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 9.5 sec chord
Diameter=56.4 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 10TV191, (2026/02/04 06:29UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.1 +07:24:35  0.4  6.95  77
Bellatrix      05:26:31.9 +06:22:16  1.6  6.84  84
35 Ori         05:35:23.4 +14:19:17  5.6  1.81  82
PPM 121164     05:37:36.4 +12:27:03  7.8  0.18  81
10TV191        05:37:52.8 +12:36:56 15.6        81
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 1.1 sigma about the mid-time.
The median site spacing is 17.8 km RECON observability=1.0 and success probability=6.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:28:23 -50.4 Dark Up 46.2 221.5 Up 06:13:23 - 06:43:23 -864
Summerland 06:28:23 -50.5 Dark Up 46.5 221.4 Up 06:13:23 - 06:43:23 -892
Penticton 06:28:22 -50.6 Dark Up 46.5 221.6 Up 06:13:22 - 06:43:22 -895
Okanagan Falls 06:28:22 -50.7 Dark Up 46.7 221.7 Up 06:13:22 - 06:43:22 -910
Oliver 06:28:21 -50.9 Dark Up 46.8 221.8 Up 06:13:21 - 06:43:21 -922
Anarchist Mountain Observatory 06:28:19 -51.1 Dark Up 46.9 222.2 Up 06:13:19 - 06:43:19 -931
Oroville 06:28:19 -51.1 Dark Up 46.9 222.1 Up 06:13:19 - 06:43:19 -938
Tonasket 06:28:19 -51.3 Dark Up 47.1 222.3 Up 06:13:19 - 06:43:19 -956
Okanogan 06:28:18 -51.5 Dark Up 47.4 222.3 Up 06:13:18 - 06:43:18 -985
Brewster 06:28:18 -51.6 Dark Up 47.7 222.3 Up 06:13:18 - 06:43:18 -1011
Manson/Chelan 06:28:18 -51.5 Dark Up 48.0 221.9 Up 06:13:18 - 06:43:18 -1035
Entiat 06:28:18 -51.7 Dark Up 48.2 222.0 Up 06:13:18 - 06:43:18 -1054
Wenatchee 06:28:17 -51.8 Dark Up 48.5 222.1 Up 06:13:17 - 06:43:17 -1076
Ellensburg 06:28:17 -52.0 Dark Up 48.9 222.1 Up 06:13:17 - 06:43:17 -1114
Pasco 06:28:08 -53.2 Dark Up 48.8 224.5 Up 06:13:08 - 06:43:08 -1141
Yakima 06:28:15 -52.3 Dark Up 49.2 222.4 Up 06:13:15 - 06:43:15 -1147
PNWRO 06:28:06 -53.5 Dark Up 48.8 225.0 Up 06:13:06 - 06:43:06 -1156
Toppenish/White Swan 06:28:14 -52.5 Dark Up 49.3 222.8 Up 06:13:14 - 06:43:14 -1160
George/Umatilla 06:28:08 -53.3 Dark Up 49.1 224.5 Up 06:13:08 - 06:43:08 -1173
Goldendale 06:28:14 -52.7 Dark Up 49.9 222.6 Up 06:13:14 - 06:43:14 -1215
The Dalles 06:28:15 -52.6 Dark Up 50.2 222.3 Up 06:13:15 - 06:43:15 -1241
Maupin 06:28:12 -53.0 Dark Up 50.5 222.8 Up 06:13:12 - 06:43:12 -1273
Niwot 06:26:43 -63.9 Dark Up 44.2 245.2 Up 06:11:43 - 06:41:43 -1294
SwRI 06:26:42 -64.0 Dark Up 44.3 245.1 Up 06:11:42 - 06:41:42 -1305
Madras/Culver 06:28:11 -53.3 Dark Up 50.9 223.2 Up 06:13:11 - 06:43:11 -1319
Redmond 06:28:10 -53.5 Dark Up 51.2 223.4 Up 06:13:10 - 06:43:10 -1350
Sisters 06:28:12 -53.3 Dark Up 51.4 222.9 Up 06:13:12 - 06:43:12 -1357
Bend 06:28:09 -53.6 Dark Up 51.4 223.4 Up 06:13:09 - 06:43:09 -1371
Oregon Observatory 06:28:09 -53.6 Dark Up 51.6 223.4 Up 06:13:09 - 06:43:09 -1389
La Pine/Gilchrist 06:28:09 -53.7 Dark Up 51.8 223.5 Up 06:13:09 - 06:43:09 -1407
North Lake 06:28:05 -54.3 Dark Up 51.8 224.7 Up 06:13:05 - 06:43:05 -1429
Paisley 06:28:01 -54.9 Dark Up 52.0 225.6 Up 06:13:01 - 06:43:01 -1467
Lakeview 06:27:58 -55.3 Dark Up 52.3 226.3 Up 06:12:58 - 06:42:58 -1506
Chiloquin 06:28:07 -54.2 Dark Up 52.8 224.0 Up 06:13:07 - 06:43:07 -1510
Klamath Falls 06:28:05 -54.5 Dark Up 53.0 224.4 Up 06:13:05 - 06:43:05 -1537
Tulelake 06:28:03 -54.8 Dark Up 53.0 225.1 Up 06:13:03 - 06:43:03 -1553
Cedarville 06:27:55 -55.8 Dark Up 52.6 227.2 Up 06:12:55 - 06:42:55 -1558
Fall River/Burney 06:27:59 -55.4 Dark Up 53.6 226.0 Up 06:12:59 - 06:42:59 -1629
Susanville 06:27:53 -56.3 Dark Up 53.7 227.6 Up 06:12:53 - 06:42:53 -1666
Gimple 06:27:53 -56.3 Dark Up 54.0 227.6 Up 06:12:53 - 06:42:53 -1695
Greenville 06:27:54 -56.2 Dark Up 54.0 227.5 Up 06:12:54 - 06:42:54 -1697
Portola 06:27:50 -56.7 Dark Up 54.0 228.5 Up 06:12:50 - 06:42:50 -1714
Quincy 06:27:53 -56.4 Dark Up 54.1 227.7 Up 06:12:53 - 06:42:53 -1715
Reno 06:27:46 -57.3 Dark Up 53.8 229.6 Up 06:12:46 - 06:42:46 -1721
Carson City 06:27:45 -57.5 Dark Up 54.0 230.0 Up 06:12:45 - 06:42:45 -1752
Yerington 06:27:41 -58.0 Dark Up 53.7 231.0 Up 06:12:41 - 06:42:41 -1753
Gardnerville 06:27:43 -57.7 Dark Up 54.1 230.3 Up 06:12:43 - 06:42:43 -1772
Hawthorne 06:27:37 -58.6 Dark Up 53.7 232.2 Up 06:12:37 - 06:42:37 -1780
Tonopah 06:27:28 -59.7 Dark Up 53.1 234.4 Up 06:12:28 - 06:42:28 -1785
Lee Vining 06:27:37 -58.6 Dark Up 54.4 232.1 Up 06:12:37 - 06:42:37 -1843
Beatty 06:27:21 -60.7 Dark Up 53.5 236.2 Up 06:12:21 - 06:42:21 -1876
Indian Springs 06:27:15 -61.6 Dark Up 53.0 237.8 Up 06:12:15 - 06:42:15 -1876
Bishop 06:27:32 -59.5 Dark Up 54.3 233.7 Up 06:12:32 - 06:42:32 -1878
Henderson 06:27:09 -62.4 Dark Up 52.8 239.2 Up 06:12:09 - 06:42:09 -1905
Patrick 06:27:02 -63.4 Dark Up 52.3 241.1 Up 06:12:02 - 06:42:02 -1931
Lone Pine 06:27:27 -60.1 Dark Up 54.5 235.0 Up 06:12:27 - 06:42:27 -1937
DCO 06:26:57 -64.1 Dark Up 52.0 242.2 Up 06:11:57 - 06:41:57 -1939
Searchlight/Boulder City 06:27:07 -62.8 Dark Up 53.1 239.9 Up 06:12:07 - 06:42:07 -1955
Kingman/Dolan Springs 06:27:02 -63.5 Dark Up 52.6 241.1 Up 06:12:02 - 06:42:02 -1956
Laughlin/Bullhead City 06:27:04 -63.2 Dark Up 53.0 240.6 Up 06:12:04 - 06:42:04 -1973
Mohave Valley 06:27:04 -63.3 Dark Up 53.1 240.9 Up 06:12:04 - 06:42:04 -1997
Lake Havasu City 06:27:00 -63.7 Dark Up 53.1 241.7 Up 06:12:00 - 06:42:00 -2026
Parker 06:26:59 -64.0 Dark Up 53.3 242.1 Up 06:11:59 - 06:41:59 -2058
Blythe 06:26:59 -64.1 Dark Up 53.7 242.4 Up 06:11:59 - 06:41:59 -2114
CPSLO 06:27:36 -59.1 Dark Up 57.0 233.2 Up 06:12:36 - 06:42:36 -2124
Idyllwild 06:27:10 -62.6 Dark Up 55.2 239.9 Up 06:12:10 - 06:42:10 -2162
Wildwood 06:27:21 -61.1 Dark Up 56.3 237.3 Up 06:12:21 - 06:42:21 -2181
Calipatria 06:27:01 -63.8 Dark Up 54.6 242.0 Up 06:12:01 - 06:42:01 -2186
Yuma 06:26:55 -64.6 Dark Up 54.2 243.5 Up 06:11:55 - 06:41:55 -2200

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 10TV191, (2026/02/04 06:29UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.95  77
Bellatrix      05:25:07.8 +06:20:58  1.6  6.84  84
35 Ori         05:33:54.3 +14:18:20  5.6  1.81  82
PPM 121164     05:36:08.5 +12:26:10  7.8  0.18  81
10TV191        05:36:24.8 +12:36:04 15.6        81
Positions are for J2000

Event circumstances last updated at 2019/06/08 22:31:15 UT

Marc W. Buie, Southwest Research Institute

RECON