RECON: TNO occultation with 69987

Event between (69987) 98WA25 and star GA1120:01056667 with event index number of 313851

Geocentric closest approach at 2020/10/09 09:03:40 UTC

J2000 position of star is 05:15:09.7 +22:08:22
Equinox of date position of star is 05:16:23.9 +22:09:41
Stellar brightness G=15.2, use SENSEUP=128
Star is 20 degrees from the moon. Moon is 57% illuminated.
TNO apparent brightness V=26.4

[RECON map]
TNO is 42.4 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 9.2 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 942 seconds.
The 1-sigma cross-track error in the shadow position is 2879 km.
The sky-plane scale is 30452.0 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=229.1 km assuming a 5% albedo -- 6.5 sec chord
Diameter=93.5 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 69987, (2020/10/09 09:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:06.9 +16:32:58  0.8 10.83  30
Alnath         05:27:36.4 +28:37:23  1.6  6.94  17
108 Tau        05:16:42.7 +22:18:24  6.2  0.16  19
PPM 094196     05:16:00.8 +22:15:51 10.6  0.14  20
69987          05:16:24.6 +22:09:42 15.2        19
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 21.7 km RECON observability=1.0 and success probability=11.0%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Clarence Fulton	09:07:54	-42.9	Dark	Up	46.5	114.2	Up	08:52:54 - 09:22:54	-2976
Kelowna	09:07:58	-43.3	Dark	Up	46.6	113.7	Up	08:52:58 - 09:22:58	-3005
Peachland	09:07:59	-43.5	Dark	Up	46.4	113.3	Up	08:52:59 - 09:22:59	-3007
Victoria	09:08:22	-45.6	Dark	Up	44.7	108.6	Up	08:53:22 - 09:23:22	-3019
Summerland	09:08:01	-43.6	Dark	Up	46.6	113.3	Up	08:53:01 - 09:23:01	-3022
Penticton	09:08:01	-43.6	Dark	Up	46.6	113.3	Up	08:53:01 - 09:23:01	-3030
Oliver	09:08:04	-43.9	Dark	Up	46.8	113.0	Up	08:53:04 - 09:23:04	-3059
Anarchist Mountain Observatory	09:08:04	-44.0	Dark	Up	47.0	113.0	Up	08:53:04 - 09:23:04	-3078
Tonasket	09:08:06	-44.3	Dark	Up	47.1	112.6	Up	08:53:06 - 09:23:06	-3103
Okanogan	09:08:08	-44.6	Dark	Up	47.1	112.2	Up	08:53:08 - 09:23:08	-3128
Brewster	09:08:13	-44.9	Dark	Up	47.1	111.7	Up	08:53:13 - 09:23:13	-3146
Manson/Chelan	09:08:16	-45.2	Dark	Up	46.9	111.1	Up	08:53:16 - 09:23:16	-3154
Entiat	09:08:18	-45.4	Dark	Up	47.0	110.9	Up	08:53:18 - 09:23:18	-3171
Wenatchee	09:08:20	-45.7	Dark	Up	47.0	110.5	Up	08:53:20 - 09:23:20	-3191
Ellensburg	09:08:22	-46.1	Dark	Up	47.0	109.9	Up	08:53:22 - 09:23:22	-3220
Yakima	09:08:22	-46.5	Dark	Up	47.1	109.5	Up	08:53:22 - 09:23:22	-3255
Toppenish/White Swan	09:08:22	-46.6	Dark	Up	47.3	109.4	Up	08:53:22 - 09:23:22	-3278
Goldendale	09:08:22	-47.2	Dark	Up	47.2	108.4	Up	08:53:22 - 09:23:22	-3317
Pasco	09:08:21	-46.2	Dark	Up	48.2	110.5	Up	08:53:21 - 09:23:21	-3321
The Dalles	09:08:22	-47.5	Dark	Up	47.1	107.8	Up	08:53:22 - 09:23:22	-3328
PNWRO	09:08:21	-46.4	Dark	Up	48.4	110.5	Up	08:53:21 - 09:23:21	-3349
Maupin	09:08:22	-47.9	Dark	Up	47.3	107.5	Up	08:53:22 - 09:23:22	-3368
Sisters	09:08:22	-48.8	Dark	Up	47.2	106.1	Up	08:53:22 - 09:23:22	-3437
Redmond	09:08:22	-48.7	Dark	Up	47.5	106.5	Up	08:53:22 - 09:23:22	-3449
Bend	09:08:22	-48.9	Dark	Up	47.4	106.1	Up	08:53:22 - 09:23:22	-3465
Oregon Observatory	09:08:22	-49.1	Dark	Up	47.4	105.8	Up	08:53:22 - 09:23:22	-3478
La Pine/Gilchrist	09:08:22	-49.3	Dark	Up	47.4	105.6	Up	08:53:22 - 09:23:22	-3496
North Lake	09:08:22	-49.5	Dark	Up	47.9	105.7	Up	08:53:22 - 09:23:22	-3551
Paisley	09:08:22	-49.8	Dark	Up	48.3	105.4	Up	08:53:22 - 09:23:22	-3611
Klamath Falls	09:08:22	-50.7	Dark	Up	47.6	103.8	Up	08:53:22 - 09:23:22	-3628
Lakeview	09:08:22	-50.2	Dark	Up	48.6	105.0	Up	08:53:22 - 09:23:22	-3664
Cedarville	09:08:22	-50.7	Dark	Up	48.9	104.4	Up	08:53:22 - 09:23:22	-3731
Fall River/Burney	09:08:22	-51.6	Dark	Up	48.1	102.9	Up	08:53:22 - 09:23:22	-3751
Susanville	09:08:22	-51.8	Dark	Up	48.8	102.8	Up	08:53:22 - 09:23:22	-3829
Greenville	09:08:22	-52.1	Dark	Up	48.6	102.2	Up	08:53:22 - 09:23:22	-3850
Gimple	09:08:22	-52.1	Dark	Up	48.7	102.3	Up	08:53:22 - 09:23:22	-3852
Quincy	09:08:22	-52.3	Dark	Up	48.7	102.0	Up	08:53:22 - 09:23:22	-3870
Portola	09:08:22	-52.2	Dark	Up	49.1	102.3	Up	08:53:22 - 09:23:22	-3892
Reno	09:08:22	-52.2	Dark	Up	49.6	102.5	Up	08:53:22 - 09:23:22	-3933
Carson City	09:08:22	-52.4	Dark	Up	49.7	102.1	Up	08:53:22 - 09:23:22	-3969
Gardnerville	09:08:22	-52.6	Dark	Up	49.8	101.9	Up	08:53:22 - 09:23:22	-3994
Yerington	09:08:22	-52.3	Dark	Up	50.2	102.4	Up	08:53:22 - 09:23:22	-4002
Hawthorne	09:08:22	-52.4	Dark	Up	50.7	102.3	Up	08:53:22 - 09:23:22	-4060
Lee Vining	09:08:22	-53.1	Dark	Up	50.5	101.2	Up	08:53:22 - 09:23:22	-4106
Tonopah	09:08:22	-52.1	Dark	Up	51.9	102.9	Up	08:53:22 - 09:23:22	-4138
Bishop	09:08:22	-53.3	Dark	Up	51.2	101.1	Up	08:53:22 - 09:23:22	-4182
Niwot	09:07:23	-44.1	Dark	Up	59.8	117.9	Up	08:52:23 - 09:22:23	-4235
SwRI	09:07:25	-44.2	Dark	Up	59.8	117.6	Up	08:52:25 - 09:22:25	-4243
Beatty	09:08:22	-52.8	Dark	Up	52.5	101.8	Up	08:53:22 - 09:23:22	-4265
CPSLO	09:09:36	-55.8	Dark	Up	49.9	97.1	Up	08:54:36 - 09:24:36	-4286
Indian Springs	09:08:22	-52.4	Dark	Up	53.4	102.3	Up	08:53:22 - 09:23:22	-4322
Henderson	09:08:22	-52.4	Dark	Up	54.1	102.1	Up	08:53:22 - 09:23:22	-4393
Searchlight/Boulder City	09:08:22	-52.8	Dark	Up	54.3	101.4	Up	08:53:22 - 09:23:22	-4452
Wildwood	09:09:29	-55.7	Dark	Up	51.7	97.1	Up	08:54:29 - 09:24:29	-4466
Patrick	09:08:22	-52.2	Dark	Up	55.1	102.2	Up	08:53:22 - 09:23:22	-4482
Laughlin/Bullhead City	09:08:22	-52.8	Dark	Up	54.6	101.3	Up	08:53:22 - 09:23:22	-4491
Kingman/Dolan Springs	09:08:22	-52.5	Dark	Up	55.0	101.7	Up	08:53:22 - 09:23:22	-4500
Mohave Valley	09:08:22	-53.0	Dark	Up	54.7	100.9	Up	08:53:22 - 09:23:22	-4519
DCO	09:08:22	-52.0	Dark	Up	55.8	102.4	Up	08:53:22 - 09:23:22	-4530
Lake Havasu City	09:08:22	-53.1	Dark	Up	54.9	100.6	Up	08:53:22 - 09:23:22	-4565
Idyllwild	09:08:22	-55.1	Dark	Up	53.1	97.7	Up	08:53:22 - 09:23:22	-4590
Parker	09:08:22	-53.4	Dark	Up	55.0	100.1	Up	08:53:22 - 09:23:22	-4602
Blythe	09:08:22	-53.9	Dark	Up	54.9	99.1	Up	08:53:22 - 09:23:22	-4649
Calipatria	09:08:22	-54.8	Dark	Up	54.2	97.8	Up	08:53:22 - 09:23:22	-4680
George/Scottsdale	09:08:22	-52.1	Dark	Up	57.1	101.4	Up	08:53:22 - 09:23:22	-4704
Yuma	09:08:22	-54.6	Dark	Up	55.0	97.8	Up	08:53:22 - 09:23:22	-4744

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 69987, (2020/10/09 09:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 10.83  30
Alnath         05:26:17.5 +28:36:23  1.6  6.94  17
108 Tau        05:15:27.6 +22:17:05  6.2  0.16  19
PPM 094196     05:14:45.8 +22:14:30 10.6  0.14  20
69987          05:15:09.7 +22:08:22 15.2        19
Positions are for J2000

Event circumstances last updated at 2020/07/30 22:29:15 UT

RECON