RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star GA1020:02011506 with event index number of 1333000

Geocentric closest approach at 2023/12/09 09:59:54 UTC

J2000 position of star is 06:35:48.0 +13:04:52
Equinox of date position of star is 06:37:08.6 +13:03:37
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 114 degrees from the moon. Moon is 14% illuminated.
Apparent brightness V=24.2

[RECON map]
Object is 35.9 AU from the Sun and 35.0 AU from the Earth.
Apparent velocity is 23.3 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 428 seconds.
The 1-sigma cross-track error in the shadow position is 2641 km.
The sky-plane scale is 25368.8 km/arcsec.

The object has an absolute magnitude Hv=8.6
Diameter=131.8 km assuming a 5% albedo -- 5.0 sec chord
Diameter=53.8 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2023/12/09 10:00UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:28.1 +07:24:34  0.4 11.49 123
Alhena         06:39:05.7 +16:22:37  1.9  3.35 114
PPM 122607     06:32:59.6 +11:46:24  6.3  1.64 115
PPM 122737     06:37:13.7 +13:09:22  8.1  0.10 114
69986          06:37:08.9 +13:03:36 16.0       114
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 2.1 sigma about the mid-time.
The median site spacing is 35.9 km RECON observability=1.0 and success probability=22.4%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	09:58:40	-44.5	Dark	Down	47.0	213.4	Up	09:43:40 - 10:13:40	1487
Kamloops	09:59:20	-53.0	Dark	Down	51.8	193.3	Up	09:44:20 - 10:14:20	1358
Kelowna	09:59:17	-53.0	Dark	Down	52.4	195.0	Up	09:44:17 - 10:14:17	1285
Peachland	09:59:18	-53.2	Dark	Down	52.6	194.5	Up	09:44:18 - 10:14:18	1275
Summerland	09:59:18	-53.2	Dark	Down	52.7	194.7	Up	09:44:18 - 10:14:18	1262
Penticton	09:59:17	-53.2	Dark	Down	52.8	194.9	Up	09:44:17 - 10:14:17	1256
Oliver	09:59:17	-53.4	Dark	Down	53.1	195.0	Up	09:44:17 - 10:14:17	1224
Anarchist Mountain Observatory	09:59:17	-53.4	Dark	Down	53.2	195.4	Up	09:44:17 - 10:14:17	1208
Victoria	09:59:29	-55.8	Dark	Down	54.3	189.0	Up	09:44:29 - 10:14:29	1172
Okanogan	09:59:17	-53.9	Dark	Down	53.9	195.3	Up	09:44:17 - 10:14:17	1150
Brewster	09:59:18	-54.2	Dark	Down	54.2	195.1	Up	09:44:18 - 10:14:18	1125
Manson/Chelan	09:59:19	-54.5	Dark	Down	54.5	194.5	Up	09:44:19 - 10:14:19	1107
Wenatchee	09:59:19	-54.8	Dark	Down	55.0	194.4	Up	09:44:19 - 10:14:19	1064
Ellensburg	09:59:20	-55.2	Dark	Down	55.4	194.2	Up	09:44:20 - 10:14:20	1026
Yakima	09:59:20	-55.4	Dark	Down	55.8	194.3	Up	09:44:20 - 10:14:20	988
Toppenish/White Swan	09:59:19	-55.4	Dark	Down	56.0	194.7	Up	09:44:19 - 10:14:19	968
PNWRO	09:59:14	-54.7	Dark	Down	56.0	197.4	Up	09:44:14 - 10:14:14	931
The Dalles	09:59:21	-56.3	Dark	Down	56.9	193.6	Up	09:44:21 - 10:14:21	896
Maupin	09:59:21	-56.5	Dark	Down	57.2	194.0	Up	09:44:21 - 10:14:21	857
Sisters	09:59:22	-57.2	Dark	Down	58.2	193.4	Up	09:44:22 - 10:14:22	775
Bend	09:59:21	-57.2	Dark	Down	58.4	194.0	Up	09:44:21 - 10:14:21	751
Oregon Observatory	09:59:22	-57.4	Dark	Down	58.6	193.8	Up	09:44:22 - 10:14:22	735
Chiloquin	09:59:23	-58.3	Dark	Down	59.9	193.6	Up	09:44:23 - 10:14:23	609
Klamath Falls	09:59:23	-58.4	Dark	Down	60.2	193.8	Up	09:44:23 - 10:14:23	576
Cedarville	09:59:17	-57.6	Dark	Down	60.6	197.2	Up	09:44:17 - 10:14:17	505
Fall River/Burney	09:59:21	-58.7	Dark	Down	61.3	195.1	Up	09:44:21 - 10:14:21	460
Dunrhomin	09:58:25	-47.4	Dark	Down	56.0	223.7	Up	09:43:25 - 10:13:25	387
Greenville	09:59:20	-58.8	Dark	Down	62.1	196.5	Up	09:44:20 - 10:14:20	369
Nikitin	09:58:25	-47.4	Dark	Down	56.1	223.8	Up	09:43:25 - 10:13:25	369
Gimple	09:59:19	-58.7	Dark	Down	62.1	196.6	Up	09:44:19 - 10:14:19	369
CU-SBO	09:58:25	-47.5	Dark	Down	56.2	223.8	Up	09:43:25 - 10:13:25	362
Quincy	09:59:20	-58.8	Dark	Down	62.3	196.6	Up	09:44:20 - 10:14:20	349
Portola	09:59:18	-58.6	Dark	Down	62.3	197.6	Up	09:44:18 - 10:14:18	336
Reno	09:59:15	-58.2	Dark	Down	62.4	199.1	Up	09:44:15 - 10:14:15	308
Carson City	09:59:15	-58.3	Dark	Down	62.7	199.3	Up	09:44:15 - 10:14:15	272
Yerington	09:59:13	-57.9	Dark	Down	62.7	200.7	Up	09:44:13 - 10:14:13	251
Gardnerville	09:59:15	-58.4	Dark	Down	62.9	199.6	Up	09:44:15 - 10:14:15	247
Hawthorne	09:59:11	-57.7	Dark	Down	63.0	202.1	Up	09:44:11 - 10:14:11	204
Lee Vining	09:59:13	-58.3	Dark	Down	63.7	201.6	Up	09:44:13 - 10:14:13	148
Bishop	09:59:10	-57.9	Dark	Down	64.0	203.5	Up	09:44:10 - 10:14:10	86
Beatty	09:59:04	-56.8	Dark	Down	63.9	207.3	Up	09:44:04 - 10:14:04	37
Patrick	09:58:52	-54.9	Dark	Down	64.0	214.6	Up	09:43:52 - 10:13:52	-116
Laughlin/Bullhead City	09:58:55	-55.5	Dark	Down	64.5	213.5	Up	09:43:55 - 10:13:55	-142
Lake Havasu City	09:58:54	-55.4	Dark	Down	64.9	214.8	Up	09:43:54 - 10:13:54	-211
Wildwood	09:59:10	-58.9	Dark	Down	67.1	206.1	Up	09:44:10 - 10:14:10	-249
Idyllwild	09:59:02	-57.5	Dark	Down	66.6	210.7	Up	09:44:02 - 10:14:02	-289
George/Scottsdale	09:58:44	-53.5	Dark	Down	64.3	220.5	Up	09:43:44 - 10:13:44	-291
Calipatria	09:58:58	-56.6	Dark	Down	66.6	214.0	Up	09:43:58 - 10:13:58	-354
Yuma	09:58:54	-55.9	Dark	Down	66.6	216.5	Up	09:43:54 - 10:13:54	-399

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 69986, (2023/12/09 10:00UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 11.49 123
Alhena         06:37:42.8 +16:23:57  1.9  3.35 114
PPM 122607     06:31:39.4 +11:47:32  6.3  1.64 115
PPM 122737     06:35:52.7 +13:10:39  8.1  0.10 114
69986          06:35:48.0 +13:04:52 16.0       114
Positions are for J2000

Event circumstances last updated at 2023/11/06 05:16:42 UT

RECON