RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1280:01542791 with event index number of 239981

Geocentric closest approach at 2020/01/10 10:12:56 UTC

J2000 position of star is 04:42:15.5 +39:35:00
Equinox of date position of star is 04:43:33.0 +39:37:05
Stellar brightness G=13.3, use SENSEUP=32
Star is 34 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 16.3 AU from the Sun and 15.5 AU from the Earth.
The TNO is moving 20.5 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
The 1-sigma error in the time of the event is 57 seconds.
The 1-sigma cross-track error in the shadow position is 995 km.
The sky-plane scale is 11228.6 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.7 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2020/01/10 10:13UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.3 +16:32:53  0.8 23.12  35
3Iot Aur       04:58:18.1 +33:11:45  2.7  7.07  30
PPM 047304     04:45:36.5 +40:49:20  6.0  1.26  34
PPM 069614     04:45:55.8 +39:54:40  8.5  0.53  34
PPM 069583     04:42:33.6 +39:37:23 10.0  0.21  34
248835         04:43:38.0 +39:37:13 13.3        34
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 21.5 km RECON observability=1.0 and success probability=44.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:08:59 -53.0 Dark Up 40.0 287.1 Up 10:03:45 - 10:14:13 918
Summerland 10:08:59 -53.2 Dark Up 40.2 286.9 Up 10:03:45 - 10:14:13 906
Penticton 10:08:59 -53.3 Dark Up 40.0 287.3 Up 10:03:45 - 10:14:13 876
Okanagan Falls 10:08:58 -53.4 Dark Up 40.0 287.4 Up 10:03:44 - 10:14:12 856
Oliver 10:08:58 -53.5 Dark Up 39.9 287.6 Up 10:03:44 - 10:14:12 839
Anarchist Mountain Observatory 10:08:57 -53.5 Dark Up 39.8 287.8 Up 10:03:43 - 10:14:11 825
Oroville 10:08:58 -53.6 Dark Up 39.8 287.9 Up 10:03:44 - 10:14:12 815
Tonasket 10:08:57 -53.7 Dark Up 39.7 288.0 Up 10:03:43 - 10:14:11 791
Okanogan 10:08:57 -54.0 Dark Up 39.7 288.2 Up 10:03:43 - 10:14:11 752
Brewster 10:08:57 -54.3 Dark Up 39.7 288.3 Up 10:03:43 - 10:14:11 719
Manson/Chelan 10:08:58 -54.6 Dark Up 39.9 288.3 Up 10:03:44 - 10:14:12 688
Entiat 10:08:58 -54.7 Dark Up 39.9 288.4 Up 10:03:44 - 10:14:12 663
Wenatchee 10:08:58 -55.0 Dark Up 39.9 288.6 Up 10:03:44 - 10:14:12 634
Ellensburg 10:08:58 -55.3 Dark Up 39.9 288.8 Up 10:03:44 - 10:14:12 585
Yakima 10:08:58 -55.6 Dark Up 39.8 289.1 Up 10:03:44 - 10:14:12 542
Pasco 10:08:54 -54.9 Dark Up 38.7 290.1 Up 10:03:40 - 10:14:08 540
Toppenish/White Swan 10:08:57 -55.6 Dark Up 39.6 289.3 Up 10:03:43 - 10:14:11 522
PNWRO 10:08:53 -54.9 Dark Up 38.5 290.4 Up 10:03:39 - 10:14:07 519
George/Umatilla 10:08:54 -55.2 Dark Up 38.7 290.2 Up 10:03:40 - 10:14:08 499
Goldendale 10:08:58 -56.1 Dark Up 39.7 289.5 Up 10:03:44 - 10:14:12 454
The Dalles 10:08:58 -56.5 Dark Up 39.8 289.5 Up 10:03:44 - 10:14:12 422
Maupin 10:08:58 -56.7 Dark Up 39.6 289.9 Up 10:03:44 - 10:14:12 380
Niwot 10:08:20 -47.9 Dark Up 27.0 300.4 Low 10:03:06 - 10:13:34 367
Madras/Culver 10:08:57 -57.0 Dark Up 39.5 290.3 Up 10:03:43 - 10:14:11 321
Redmond 10:08:57 -57.2 Dark Up 39.4 290.6 Up 10:03:43 - 10:14:11 282
Sisters 10:08:58 -57.4 Dark Up 39.6 290.3 Up 10:03:44 - 10:14:12 275
Bend 10:08:57 -57.4 Dark Up 39.4 290.7 Up 10:03:43 - 10:14:11 256
Oregon Observatory 10:08:58 -57.6 Dark Up 39.4 290.7 Up 10:03:44 - 10:14:12 234
La Pine/Gilchrist 10:08:58 -57.7 Dark Up 39.4 290.9 Up 10:03:44 - 10:14:12 211
North Lake 10:08:56 -57.6 Dark Up 38.8 291.5 Up 10:03:42 - 10:14:10 179
Paisley 10:08:55 -57.7 Dark Up 38.4 292.0 Up 10:03:41 - 10:14:09 130
Chiloquin 10:08:58 -58.6 Dark Up 39.2 291.5 Up 10:03:44 - 10:14:12 85
Lakeview 10:08:54 -57.8 Dark Up 38.1 292.5 Up 10:03:40 - 10:14:08 81
Klamath Falls 10:08:58 -58.7 Dark Up 39.0 291.8 Up 10:03:44 - 10:14:12 51
Tulelake 10:08:56 -58.6 Dark Up 38.7 292.2 Up 10:03:42 - 10:14:10 30
Cedarville 10:08:53 -58.0 Dark Up 37.7 293.0 Up 10:03:39 - 10:14:07 17
Fall River/Burney 10:08:56 -59.0 Dark Up 38.3 292.9 Up 10:03:42 - 10:14:10 -65
Susanville 10:08:54 -58.8 Dark Up 37.6 293.6 Up 10:03:40 - 10:14:08 -113
Gimple 10:08:54 -59.1 Dark Up 37.6 293.7 Up 10:03:40 - 10:14:08 -147
Greenville 10:08:54 -59.2 Dark Up 37.7 293.7 Up 10:03:40 - 10:14:08 -149
Quincy 10:08:54 -59.3 Dark Up 37.6 293.8 Up 10:03:40 - 10:14:08 -170
Portola 10:08:53 -59.0 Dark Up 37.2 294.1 Up 10:03:39 - 10:14:07 -171
Reno 10:08:51 -58.7 Dark Up 36.6 294.6 Up 10:03:37 - 10:14:05 -182
Carson City 10:08:51 -58.8 Dark Up 36.5 294.8 Up 10:03:37 - 10:14:05 -219
Yerington 10:08:49 -58.4 Dark Up 36.0 295.2 Up 10:03:35 - 10:14:03 -222
Gardnerville 10:08:51 -58.9 Dark Up 36.3 295.0 Up 10:03:37 - 10:14:05 -244
Hawthorne 10:08:48 -58.2 Dark Up 35.4 295.7 Up 10:03:34 - 10:14:02 -256
Tonopah 10:08:44 -57.4 Dark Up 34.2 296.5 Up 10:03:30 - 10:13:58 -264
Lee Vining 10:08:49 -58.8 Dark Up 35.5 295.9 Up 10:03:35 - 10:14:03 -328
Indian Springs 10:08:40 -56.7 Dark Up 32.4 297.9 Up 10:03:26 - 10:13:54 -368
Beatty 10:08:43 -57.4 Dark Up 33.3 297.4 Up 10:03:29 - 10:13:57 -369
Bishop 10:08:47 -58.5 Dark Up 34.7 296.5 Up 10:03:33 - 10:14:01 -370
Henderson 10:08:38 -56.3 Dark Up 31.7 298.5 Up 10:03:24 - 10:13:52 -400
Patrick 10:08:35 -55.6 Dark Up 30.6 299.2 Up 10:03:21 - 10:13:49 -426
DCO 10:08:33 -55.1 Dark Up 30.0 299.6 Low 10:03:19 - 10:13:47 -432
Lone Pine 10:08:46 -58.5 Dark Up 34.1 297.1 Up 10:03:32 - 10:14:00 -438
Kingman/Dolan Springs 10:08:35 -55.8 Dark Up 30.6 299.2 Up 10:03:21 - 10:13:49 -455
Searchlight/Boulder City 10:08:37 -56.4 Dark Up 31.4 298.8 Up 10:03:23 - 10:13:51 -456
Laughlin/Bullhead City 10:08:37 -56.2 Dark Up 31.0 299.1 Up 10:03:23 - 10:13:51 -475
Mohave Valley 10:08:37 -56.2 Dark Up 30.9 299.2 Up 10:03:23 - 10:13:51 -502
Lake Havasu City 10:08:36 -56.1 Dark Up 30.5 299.5 Up 10:03:22 - 10:13:50 -534
Parker 10:08:36 -56.2 Dark Up 30.3 299.7 Up 10:03:22 - 10:13:50 -568
Blythe 10:08:37 -56.5 Dark Up 30.2 299.9 Up 10:03:23 - 10:13:51 -631
CPSLO 10:08:52 -60.9 Dark Up 35.4 297.0 Up 10:03:38 - 10:14:06 -645
Idyllwild 10:08:42 -58.2 Dark Up 31.8 299.2 Up 10:03:28 - 10:13:56 -689
Wildwood 10:08:47 -59.6 Dark Up 33.4 298.4 Up 10:03:33 - 10:14:01 -711
Calipatria 10:08:39 -57.4 Dark Up 30.7 299.8 Up 10:03:25 - 10:13:53 -712
Yuma 10:08:37 -56.7 Dark Up 29.8 300.3 Low 10:03:23 - 10:13:51 -725

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 248835, (2020/01/10 10:13UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 23.12  35
3Iot Aur       04:56:59.6 +33:09:58  2.7  7.07  30
PPM 047304     04:44:13.0 +40:47:10  6.0  1.26  34
PPM 069614     04:44:33.0 +39:52:31  8.5  0.53  34
PPM 069583     04:41:11.2 +39:35:08 10.0  0.21  34
248835         04:42:15.5 +39:35:00 13.3        34
Positions are for J2000

Event circumstances last updated at 2018/10/25 20:46:59 UT

Marc W. Buie, Southwest Research Institute

RECON