RECON: TNO occultation with 91554

Event between (91554) 99RZ215 and star GA1120:00091059 with event index number of 2629396

Geocentric closest approach at 2027/11/07 05:17:44 UTC

J2000 position of star is 00:42:58.1 +22:50:22
Equinox of date position of star is 00:44:09.3 +22:57:43
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 56 degrees from the moon. Moon is 58% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 40.7 AU from the Sun and 39.8 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 179 seconds.
The 1-sigma cross-track error in the shadow position is 3941 km.
The sky-plane scale is 28857.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.8
Diameter=166.0 km assuming a 5% albedo -- 7.5 sec chord
Diameter=67.8 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 

Star training set for 91554, (2027/11/07 05:18UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:22.9 +45:22:52  1.3 53.40  59
Algenib        00:14:40.4 +15:20:18  2.8 10.39  46
55 Psc         00:41:23.9 +21:35:26  6.4  1.57  55
PPM 090108     00:46:41.7 +23:44:34  7.2  0.91  57
PPM 090071     00:43:51.2 +22:59:05  9.1  0.14  56
91554          00:44:26.7 +22:59:30 13.9        56
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 26.3 km RECON observability=1.0 and success probability=11.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:16:55 -44.6 Dark Up 61.8 168.9 Up 05:01:55 - 05:31:55 -2248
Victoria 05:17:10 -44.1 Dark Up 63.4 161.9 Up 05:02:10 - 05:32:10 -2308
Peachland 05:16:56 -45.4 Dark Up 62.8 169.7 Up 05:01:56 - 05:31:56 -2346
Kelowna 05:16:55 -45.5 Dark Up 62.7 170.3 Up 05:01:55 - 05:31:55 -2348
Summerland 05:16:56 -45.5 Dark Up 63.0 169.9 Up 05:01:56 - 05:31:56 -2362
Penticton 05:16:56 -45.6 Dark Up 63.0 170.1 Up 05:01:56 - 05:31:56 -2372
Oliver 05:16:56 -45.8 Dark Up 63.4 169.9 Up 05:01:56 - 05:31:56 -2401
Anarchist Mountain Observatory 05:16:57 -46.1 Dark Up 63.6 170.3 Up 05:01:57 - 05:31:57 -2422
Tonasket 05:16:58 -46.2 Dark Up 63.9 170.0 Up 05:01:58 - 05:31:58 -2446
Okanogan 05:16:59 -46.3 Dark Up 64.2 169.6 Up 05:01:59 - 05:31:59 -2469
Brewster 05:17:00 -46.4 Dark Up 64.4 169.1 Up 05:02:00 - 05:32:00 -2484
Manson/Chelan 05:17:02 -46.3 Dark Up 64.6 168.2 Up 05:02:02 - 05:32:02 -2487
Wenatchee 05:17:03 -46.4 Dark Up 65.0 167.7 Up 05:02:03 - 05:32:03 -2521
Ellensburg 05:17:05 -46.5 Dark Up 65.4 167.0 Up 05:02:05 - 05:32:05 -2547
Yakima 05:17:06 -46.7 Dark Up 65.8 166.8 Up 05:02:06 - 05:32:06 -2581
Sleaford 05:16:13 -49.8 Dark Up 60.0 196.0 Up 05:01:13 - 05:31:13 -2603
Toppenish/White Swan 05:17:06 -47.0 Dark Up 66.0 167.0 Up 05:02:06 - 05:32:06 -2606
Goldendale 05:17:09 -47.0 Dark Up 66.5 165.8 Up 05:02:09 - 05:32:09 -2636
The Dalles 05:17:10 -46.9 Dark Up 66.6 164.9 Up 05:02:10 - 05:32:10 -2640
Maupin 05:17:11 -47.2 Dark Up 67.1 164.9 Up 05:02:11 - 05:32:11 -2680
PNWRO 05:17:02 -48.0 Dark Up 66.6 170.3 Up 05:02:02 - 05:32:02 -2697
Sisters 05:17:14 -47.3 Dark Up 67.8 163.2 Up 05:02:14 - 05:32:14 -2735
Bend 05:17:15 -47.6 Dark Up 68.1 163.6 Up 05:02:15 - 05:32:15 -2767
Oregon Observatory 05:17:15 -47.6 Dark Up 68.2 163.2 Up 05:02:15 - 05:32:15 -2776
North Lake 05:17:16 -48.3 Dark Up 69.0 164.1 Up 05:02:16 - 05:32:16 -2854
Chiloquin 05:17:21 -48.0 Dark Up 69.4 161.2 Up 05:02:21 - 05:32:21 -2873
Klamath Falls 05:17:21 -48.2 Dark Up 69.8 161.1 Up 05:02:21 - 05:32:21 -2906
Lakeview 05:17:17 -49.1 Dark Up 70.1 164.7 Up 05:02:17 - 05:32:17 -2970
Fall River/Burney 05:17:22 -49.0 Dark Up 71.0 161.0 Up 05:02:22 - 05:32:22 -3026
Cedarville 05:17:17 -49.5 Dark Up 70.8 164.7 Up 05:02:17 - 05:32:17 -3036
Susanville 05:17:22 -49.7 Dark Up 71.7 162.5 Up 05:02:22 - 05:32:22 -3114
Greenville 05:17:23 -49.7 Dark Up 71.9 161.4 Up 05:02:23 - 05:32:23 -3126
Gimple 05:17:24 -49.7 Dark Up 72.0 161.7 Up 05:02:24 - 05:32:24 -3130
Quincy 05:17:24 -49.7 Dark Up 72.1 161.2 Up 05:02:24 - 05:32:24 -3144
Portola 05:17:23 -50.1 Dark Up 72.4 162.5 Up 05:02:23 - 05:32:23 -3176
Reno 05:17:22 -50.7 Dark Up 72.8 164.2 Up 05:02:22 - 05:32:22 -3229
Carson City 05:17:23 -50.9 Dark Up 73.1 163.9 Up 05:02:23 - 05:32:23 -3262
Gardnerville 05:17:22 -51.0 Dark Up 73.4 163.9 Up 05:02:22 - 05:32:22 -3286
Yerington 05:17:21 -51.4 Dark Up 73.4 165.7 Up 05:02:21 - 05:32:21 -3308
Hawthorne 05:17:20 -52.0 Dark Up 74.0 167.1 Up 05:02:20 - 05:32:20 -3373
Lee Vining 05:17:24 -51.9 Dark Up 74.4 165.0 Up 05:02:24 - 05:32:24 -3403
Tonopah 05:17:16 -53.2 Dark Up 74.6 171.5 Up 05:02:16 - 05:32:16 -3478
Bishop 05:17:22 -52.6 Dark Up 75.1 166.9 Up 05:02:22 - 05:32:22 -3490
Beatty 05:17:18 -54.0 Dark Up 75.8 172.5 Up 05:02:18 - 05:32:18 -3606
Indian Springs 05:17:15 -54.9 Dark Up 76.2 176.4 Up 05:02:15 - 05:32:15 -3684
Dunrhomin 05:16:31 -59.3 Dark Up 70.9 207.4 Up 05:01:31 - 05:31:31 -3750
Henderson 05:17:14 -55.7 Dark Up 76.8 179.1 Up 05:02:14 - 05:32:14 -3765
CU-SBO 05:16:31 -59.5 Dark Up 71.1 207.4 Up 05:01:31 - 05:31:31 -3771
Wildwood 05:17:31 -53.8 Dark Up 78.3 162.6 Up 05:02:31 - 05:32:31 -3784
Laughlin/Bullhead City 05:17:14 -56.3 Dark Up 77.7 180.8 Up 05:02:14 - 05:32:14 -3865
Patrick 05:17:11 -56.7 Dark Up 77.4 183.7 Up 05:02:11 - 05:32:11 -3873
Kingman/Dolan Springs 05:17:12 -56.7 Dark Up 77.6 183.0 Up 05:02:12 - 05:32:12 -3886
Mohave Valley 05:17:15 -56.5 Dark Up 77.9 180.9 Up 05:02:15 - 05:32:15 -3891
Idyllwild 05:17:25 -55.4 Dark Up 79.0 170.8 Up 05:02:25 - 05:32:25 -3905
Lake Havasu City 05:17:15 -56.8 Dark Up 78.3 182.0 Up 05:02:15 - 05:32:15 -3941
Parker 05:17:16 -57.0 Dark Up 78.7 182.2 Up 05:02:16 - 05:32:16 -3975
Calipatria 05:17:22 -56.5 Dark Up 79.7 176.2 Up 05:02:22 - 05:32:22 -4017
Yuma 05:17:20 -57.3 Dark Up 80.1 180.8 Up 05:02:20 - 05:32:20 -4099
George/Scottsdale 05:17:08 -59.0 Dark Up 78.8 193.8 Up 05:02:08 - 05:32:08 -4123

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 91554, (2027/11/07 05:18UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 53.40  59
Algenib        00:13:14.2 +15:11:01  2.8 10.39  46
55 Psc         00:39:55.6 +21:26:17  6.4  1.57  55
PPM 090108     00:45:12.8 +23:35:27  7.2  0.91  57
PPM 090071     00:42:22.6 +22:49:56  9.1  0.14  56
91554          00:42:58.1 +22:50:22 13.9        56
Positions are for J2000

Event circumstances last updated at 2022/05/17 23:01:42 UT

Marc W. Buie, Southwest Research Institute

RECON