RECON: TNO occultation with 12XW159

Event between 12XW159 and star GA0980:02596309 with event index number of 2036418

Geocentric closest approach at 2027/12/16 10:42:07 UTC

J2000 position of star is 07:02:37.7 +08:00:02
Equinox of date position of star is 07:03:55.5 +07:57:52
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 21 degrees from the moon. Moon is 90% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 32.8 AU from the Sun and 31.9 AU from the Earth.
Apparent velocity is 22.7 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 502 seconds.
The 1-sigma cross-track error in the shadow position is 2312 km.
The sky-plane scale is 23117.7 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=200.5 km assuming a 5% albedo -- 8.8 sec chord
Diameter=81.8 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 12XW159, (2027/12/16 10:42UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:41.2 +07:24:36  0.4 16.72  36
Alhena         06:39:19.6 +16:22:23  1.9 10.37  24
PPM 151655     07:00:09.6 +07:34:55  6.2  1.06  22
PPM 151792     07:03:56.0 +08:05:16  8.1  0.14  21
12XW159        07:04:08.7 +07:57:29 15.9        21
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 1.8 sigma about the mid-time.
The median site spacing is 29.3 km RECON observability=1.0 and success probability=9.8%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	10:40:44	-39.2	Dark	Up	38.1	224.0	Up	10:25:44 - 10:55:44	4810
Kamloops	10:41:20	-48.1	Dark	Up	44.5	207.1	Up	10:26:20 - 10:56:20	4591
Kelowna	10:41:17	-47.9	Dark	Up	44.9	208.6	Up	10:26:17 - 10:56:17	4532
Peachland	10:41:17	-48.2	Dark	Up	45.1	208.3	Up	10:26:17 - 10:56:17	4521
Summerland	10:41:17	-48.2	Dark	Up	45.2	208.5	Up	10:26:17 - 10:56:17	4510
Penticton	10:41:17	-48.1	Dark	Up	45.2	208.7	Up	10:26:17 - 10:56:17	4505
Oliver	10:41:16	-48.3	Dark	Up	45.5	208.8	Up	10:26:16 - 10:56:16	4477
Anarchist Mountain Observatory	10:41:15	-48.2	Dark	Up	45.6	209.2	Up	10:26:15 - 10:56:15	4464
Okanogan	10:41:15	-48.6	Dark	Up	46.3	209.2	Up	10:26:15 - 10:56:15	4410
Victoria	10:41:27	-50.8	Dark	Up	47.3	203.9	Up	10:26:27 - 10:56:27	4396
Brewster	10:41:15	-48.8	Dark	Up	46.6	209.1	Up	10:26:15 - 10:56:15	4386
Manson/Chelan	10:41:16	-49.1	Dark	Up	46.9	208.7	Up	10:26:16 - 10:56:16	4366
Wenatchee	10:41:16	-49.4	Dark	Up	47.3	208.7	Up	10:26:16 - 10:56:16	4325
Ellensburg	10:41:16	-49.7	Dark	Up	47.8	208.6	Up	10:26:16 - 10:56:16	4289
Yakima	10:41:16	-49.9	Dark	Up	48.1	208.8	Up	10:26:16 - 10:56:16	4254
Toppenish/White Swan	10:41:15	-49.8	Dark	Up	48.3	209.2	Up	10:26:15 - 10:56:15	4237
PNWRO	10:41:10	-49.0	Dark	Up	48.1	211.4	Up	10:26:10 - 10:56:10	4217
The Dalles	10:41:16	-50.6	Dark	Up	49.2	208.5	Up	10:26:16 - 10:56:16	4165
Maupin	10:41:16	-50.7	Dark	Up	49.6	208.9	Up	10:26:16 - 10:56:16	4129
Sisters	10:41:16	-51.3	Dark	Up	50.5	208.6	Up	10:26:16 - 10:56:16	4049
Bend	10:41:15	-51.2	Dark	Up	50.6	209.2	Up	10:26:15 - 10:56:15	4030
Oregon Observatory	10:41:15	-51.4	Dark	Up	50.8	209.1	Up	10:26:15 - 10:56:15	4014
Chiloquin	10:41:15	-52.1	Dark	Up	52.1	209.3	Up	10:26:15 - 10:56:15	3894
Klamath Falls	10:41:14	-52.1	Dark	Up	52.4	209.6	Up	10:26:14 - 10:56:14	3864
Dunrhomin	10:40:17	-40.3	Dark	Up	45.7	232.7	Up	10:25:17 - 10:55:17	3838
Nikitin	10:40:16	-40.4	Dark	Up	45.8	232.8	Up	10:25:16 - 10:55:16	3821
CU-SBO	10:40:16	-40.4	Dark	Up	45.9	232.7	Up	10:25:16 - 10:55:16	3814
Cedarville	10:41:07	-51.2	Dark	Up	52.4	212.4	Up	10:26:07 - 10:56:07	3814
Fall River/Burney	10:41:12	-52.2	Dark	Up	53.3	210.9	Up	10:26:12 - 10:56:12	3760
Gimple	10:41:09	-52.0	Dark	Up	53.8	212.4	Up	10:26:09 - 10:56:09	3681
Greenville	10:41:09	-52.1	Dark	Up	53.9	212.2	Up	10:26:09 - 10:56:09	3681
Quincy	10:41:08	-52.2	Dark	Up	54.0	212.4	Up	10:26:08 - 10:56:08	3662
Portola	10:41:07	-51.8	Dark	Up	53.9	213.2	Up	10:26:07 - 10:56:07	3654
Reno	10:41:04	-51.4	Dark	Up	53.9	214.4	Up	10:26:04 - 10:56:04	3635
Carson City	10:41:04	-51.5	Dark	Up	54.2	214.7	Up	10:26:04 - 10:56:04	3602
Yerington	10:41:01	-51.0	Dark	Up	54.0	215.8	Up	10:26:01 - 10:56:01	3589
Gardnerville	10:41:03	-51.5	Dark	Up	54.3	215.0	Up	10:26:03 - 10:56:03	3580
Hawthorne	10:40:59	-50.7	Dark	Up	54.2	217.0	Up	10:25:59 - 10:55:59	3550
Lee Vining	10:41:00	-51.2	Dark	Up	54.9	216.7	Up	10:26:00 - 10:56:00	3493
Bishop	10:40:57	-50.7	Dark	Up	55.0	218.3	Up	10:25:57 - 10:55:57	3443
Beatty	10:40:50	-49.5	Dark	Up	54.5	221.1	Up	10:25:50 - 10:55:50	3414
Patrick	10:40:38	-47.4	Dark	Up	54.0	226.5	Up	10:25:38 - 10:55:38	3299
Laughlin/Bullhead City	10:40:40	-47.9	Dark	Up	54.6	225.8	Up	10:25:40 - 10:55:40	3268
Lake Havasu City	10:40:38	-47.8	Dark	Up	54.9	226.8	Up	10:25:38 - 10:55:38	3206
George/Scottsdale	10:40:28	-45.8	Dark	Up	53.9	230.8	Up	10:25:28 - 10:55:28	3155
Wildwood	10:40:53	-51.3	Dark	Up	57.6	221.1	Up	10:25:53 - 10:55:53	3126
Idyllwild	10:40:46	-49.8	Dark	Up	56.8	224.3	Up	10:25:46 - 10:55:46	3109
Calipatria	10:40:40	-48.8	Dark	Up	56.6	226.6	Up	10:25:40 - 10:55:40	3060
Yuma	10:40:37	-48.1	Dark	Up	56.3	228.3	Up	10:25:37 - 10:55:37	3026

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 12XW159, (2027/12/16 10:42UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 16.72  36
Alhena         06:37:42.8 +16:23:57  1.9 10.37  24
PPM 151655     06:58:38.9 +07:37:19  6.2  1.06  22
PPM 151792     07:02:24.9 +08:07:49  8.1  0.14  21
12XW159        07:02:37.7 +08:00:02 15.9        21
Positions are for J2000

Event circumstances last updated at 2023/11/28 04:21:48 UT

RECON