RECON: TNO occultation with 87555

Event between (87555) 00QB243 and star GA1000:00090260 with event index number of 1396963

Geocentric closest approach at 2024/10/02 08:36:33 UTC

J2000 position of star is 00:58:26.9 +11:50:22
Equinox of date position of star is 00:59:36.9 +11:57:33
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 166 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.6

[RECON map]
TNO is 34.5 AU from the Sun and 33.5 AU from the Earth.
The TNO is moving 25.3 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 169 seconds.
The 1-sigma cross-track error in the shadow position is 3076 km.
The sky-plane scale is 24331.3 km/arcsec.

The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 5.5 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 87555, (2024/10/02 08:37UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:14:30.8 +15:19:16  2.8 11.48 167
75 Psc         01:07:52.0 +13:05:17  6.1  2.27 164
PPM 116928     00:59:10.7 +12:10:18  8.2  0.24 166
87555          00:59:44.8 +11:58:21 15.9       166
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 5.0 sigma about the mid-time.
The median site spacing is 25.5 km RECON observability=1.0 and success probability=5.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:35:25 -42.2 Dark Down 50.9 188.5 Up 08:20:51 - 08:49:59 7528
Kelowna 08:35:24 -42.8 Dark Down 51.6 190.0 Up 08:20:50 - 08:49:58 7438
Peachland 08:35:25 -43.0 Dark Down 51.8 189.6 Up 08:20:51 - 08:49:59 7435
Victoria 08:35:36 -44.8 Dark Down 53.3 184.0 Up 08:21:02 - 08:50:10 7422
Summerland 08:35:24 -43.1 Dark Down 51.9 189.7 Up 08:20:50 - 08:49:58 7420
Penticton 08:35:24 -43.2 Dark Down 52.0 189.9 Up 08:20:50 - 08:49:58 7412
Oliver 08:35:24 -43.5 Dark Down 52.3 190.0 Up 08:20:50 - 08:49:58 7382
Anarchist Mountain Observatory 08:35:24 -43.6 Dark Down 52.4 190.4 Up 08:20:50 - 08:49:58 7363
Sleaford 08:34:48 -37.3 Dark Down 46.7 208.8 Up 08:20:14 - 08:49:22 7341
Tonasket 08:35:25 -43.9 Dark Down 52.8 190.3 Up 08:20:51 - 08:49:59 7338
Okanogan 08:35:25 -44.3 Dark Down 53.1 190.2 Up 08:20:51 - 08:49:59 7312
Brewster 08:35:26 -44.6 Dark Down 53.4 189.9 Up 08:20:52 - 08:50:00 7294
Manson/Chelan 08:35:27 -44.9 Dark Down 53.6 189.4 Up 08:20:53 - 08:50:01 7285
Wenatchee 08:35:28 -45.3 Dark Down 54.1 189.2 Up 08:20:54 - 08:50:02 7248
Ellensburg 08:35:30 -45.8 Dark Down 54.6 188.9 Up 08:20:56 - 08:50:04 7218
Yakima 08:35:30 -46.2 Dark Down 55.0 189.0 Up 08:20:56 - 08:50:04 7182
Toppenish/White Swan 08:35:30 -46.4 Dark Down 55.2 189.3 Up 08:20:56 - 08:50:04 7159
Goldendale 08:35:32 -47.0 Dark Down 55.8 188.7 Up 08:20:58 - 08:50:06 7121
The Dalles 08:35:33 -47.2 Dark Down 56.0 188.2 Up 08:20:59 - 08:50:07 7111
PNWRO 08:35:26 -46.4 Dark Down 55.3 192.0 Up 08:20:52 - 08:50:00 7087
Maupin 08:35:33 -47.6 Dark Down 56.4 188.4 Up 08:20:59 - 08:50:07 7071
Sisters 08:35:35 -48.6 Dark Down 57.3 187.8 Up 08:21:01 - 08:50:09 7006
Bend 08:35:35 -48.8 Dark Down 57.5 188.3 Up 08:21:01 - 08:50:09 6977
Oregon Observatory 08:35:35 -48.9 Dark Down 57.7 188.1 Up 08:21:01 - 08:50:09 6966
North Lake 08:35:34 -49.5 Dark Down 58.3 189.2 Up 08:21:00 - 08:50:08 6893
Chiloquin 08:35:38 -50.3 Dark Down 59.1 187.6 Up 08:21:04 - 08:50:12 6858
Klamath Falls 08:35:38 -50.6 Dark Down 59.4 187.9 Up 08:21:04 - 08:50:12 6824
Lakeview 08:35:34 -50.3 Dark Down 59.3 190.6 Up 08:21:00 - 08:50:08 6781
Cedarville 08:35:34 -50.9 Dark Down 59.9 191.1 Up 08:21:00 - 08:50:08 6715
Fall River/Burney 08:35:39 -51.7 Dark Down 60.5 188.9 Up 08:21:05 - 08:50:13 6705
Susanville 08:35:37 -52.1 Dark Down 61.1 190.6 Up 08:21:03 - 08:50:11 6625
Greenville 08:35:38 -52.4 Dark Down 61.4 190.1 Up 08:21:04 - 08:50:12 6608
Gimple 08:35:38 -52.4 Dark Down 61.4 190.2 Up 08:21:04 - 08:50:12 6605
Quincy 08:35:38 -52.6 Dark Down 61.6 190.1 Up 08:21:04 - 08:50:12 6589
Portola 08:35:37 -52.6 Dark Down 61.6 191.1 Up 08:21:03 - 08:50:11 6563
Reno 08:35:35 -52.7 Dark Down 61.8 192.6 Up 08:21:01 - 08:50:09 6519
Carson City 08:35:36 -53.0 Dark Down 62.1 192.7 Up 08:21:02 - 08:50:10 6485
Gardnerville 08:35:36 -53.3 Dark Down 62.4 192.9 Up 08:21:02 - 08:50:10 6460
Yerington 08:35:34 -53.1 Dark Down 62.2 194.1 Up 08:21:00 - 08:50:08 6448
Hawthorne 08:35:33 -53.3 Dark Down 62.6 195.4 Up 08:20:59 - 08:50:07 6388
Lee Vining 08:35:35 -54.0 Dark Down 63.2 194.7 Up 08:21:01 - 08:50:09 6349
Tonopah 08:35:29 -53.3 Dark Down 62.7 198.6 Up 08:20:55 - 08:50:03 6303
Bishop 08:35:33 -54.3 Dark Down 63.6 196.6 Up 08:20:59 - 08:50:07 6270
Dunrhomin 08:34:50 -46.6 Dark Down 56.3 218.2 Up 08:20:16 - 08:49:24 6207
CU-SBO 08:34:49 -46.8 Dark Down 56.6 218.2 Up 08:20:15 - 08:49:23 6185
Beatty 08:35:28 -54.2 Dark Down 63.6 200.3 Up 08:20:54 - 08:50:02 6177
Indian Springs 08:35:25 -54.1 Dark Down 63.6 202.8 Up 08:20:51 - 08:49:59 6114
Henderson 08:35:23 -54.3 Dark Down 63.9 204.7 Up 08:20:49 - 08:49:57 6042
Wildwood 08:35:38 -57.4 Dark Down 66.8 198.3 Up 08:21:04 - 08:50:12 5956
Patrick 08:35:20 -54.4 Dark Down 64.1 207.5 Up 08:20:46 - 08:49:54 5948
Laughlin/Bullhead City 08:35:23 -54.9 Dark Down 64.6 206.3 Up 08:20:49 - 08:49:57 5944
Kingman/Dolan Springs 08:35:21 -54.7 Dark Down 64.3 207.4 Up 08:20:47 - 08:49:55 5931
Mohave Valley 08:35:23 -55.2 Dark Down 64.8 206.6 Up 08:20:49 - 08:49:57 5916
Lake Havasu City 08:35:23 -55.4 Dark Down 65.1 207.5 Up 08:20:49 - 08:49:57 5869
Idyllwild 08:35:32 -57.0 Dark Down 66.6 203.0 Up 08:20:58 - 08:50:06 5864
Parker 08:35:23 -55.7 Dark Down 65.4 207.9 Up 08:20:49 - 08:49:57 5833
Calipatria 08:35:29 -57.1 Dark Down 66.7 206.3 Up 08:20:55 - 08:50:03 5767
George/Scottsdale 08:35:15 -54.9 Dark Down 64.7 213.4 Up 08:20:41 - 08:49:49 5721
Yuma 08:35:25 -57.1 Dark Down 66.8 208.7 Up 08:20:51 - 08:49:59 5697

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 87555, (2024/10/02 08:37UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:13:14.2 +15:11:01  2.8 11.48 167
75 Psc         01:06:33.7 +12:57:22  6.1  2.27 164
PPM 116928     00:57:52.7 +12:02:18  8.2  0.24 166
87555          00:58:26.9 +11:50:22 15.9       166
Positions are for J2000

Event circumstances last updated at 2022/03/29 23:19:07 UT

Marc W. Buie, Southwest Research Institute

RECON