RECON: TNO occultation with 531076

Event between (531076) 12DA99 and star GA0780:04465266 with event index number of 1843456

Geocentric closest approach at 2028/02/15 10:06:57 UTC

J2000 position of star is 13:58:00.4 -10:29:01
Equinox of date position of star is 13:59:14.7 -10:35:45
Stellar brightness G=12.1, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 7 degrees from the moon. Moon is 70% illuminated.
Apparent brightness V=23.1

[RECON map]
Object is 41.4 AU from the Sun and 41.0 AU from the Earth.
Apparent velocity is 7.6 km/sec on the sky relative to the star, or, 0.9 arcsec/hr.
The 1-sigma error in the time of the event is 1211 seconds.
The 1-sigma cross-track error in the shadow position is 5539 km.
The sky-plane scale is 29705.4 km/arcsec.

The object has an absolute magnitude Hv=6.8
Diameter=260.6 km assuming a 5% albedo -- 34.1 sec chord
Diameter=106.4 km assuming a 30% albedo -- 13.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 531076, (2028/02/15 09:54UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:40.7 -11:18:26  1.0  8.09   9
95 Vir         14:08:12.4 -09:26:47  5.3  2.44   9
PPM 228049     13:58:05.8 -10:10:15  8.1  0.57   7
PPM 228088     13:59:44.6 -10:34:06  9.6  0.08   7
531076         13:59:30.3 -10:37:10 12.1         7
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 0.7 sigma about the mid-time.
The median site spacing is 13.8 km RECON observability=1.0 and success probability=7.7%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	10:14:02	-37.2	Dark	Up	25.7	161.4	Low	09:59:02 - 10:29:02	4992
Kamloops	10:15:49	-44.9	Dark	Up	23.2	146.6	Low	10:00:49 - 10:30:49	4478
Kelowna	10:15:45	-45.1	Dark	Up	24.2	147.3	Low	10:00:45 - 10:30:45	4449
Peachland	10:15:48	-45.3	Dark	Up	24.2	147.0	Low	10:00:48 - 10:30:48	4432
Summerland	10:15:50	-45.4	Dark	Up	24.3	147.1	Low	10:00:50 - 10:30:50	4425
Penticton	10:15:46	-45.4	Dark	Up	24.4	147.1	Low	10:00:46 - 10:30:46	4424
Oliver	10:15:48	-45.6	Dark	Up	24.7	147.1	Low	10:00:48 - 10:30:48	4399
Anarchist Mountain Observatory	10:15:47	-45.6	Dark	Up	24.9	147.2	Low	10:00:47 - 10:30:47	4393
Okanogan	10:15:50	-46.2	Dark	Up	25.4	146.8	Low	10:00:50 - 10:30:50	4340
Brewster	10:15:51	-46.5	Dark	Up	25.5	146.6	Low	10:00:51 - 10:30:51	4315
Manson/Chelan	10:15:55	-46.8	Dark	Up	25.6	146.2	Low	10:00:55 - 10:30:55	4288
Wenatchee	10:15:56	-47.2	Dark	Up	25.9	145.9	Low	10:00:56 - 10:30:56	4248
Dunrhomin	10:13:53	-42.2	Dark	Up	37.1	159.8	Up	09:58:53 - 10:28:53	4240
Victoria	10:16:15	-47.8	Dark	Up	23.8	143.2	Low	10:01:15 - 10:31:15	4233
Nikitin	10:13:50	-42.2	Dark	Up	37.2	159.8	Up	09:58:50 - 10:28:50	4225
CU-SBO	10:13:50	-42.3	Dark	Up	37.3	159.6	Up	09:58:50 - 10:28:50	4218
Ellensburg	10:15:59	-47.6	Dark	Up	26.2	145.5	Low	10:00:59 - 10:30:59	4211
PNWRO	10:15:49	-47.4	Dark	Up	27.6	146.9	Low	10:00:49 - 10:30:49	4192
Yakima	10:15:58	-47.9	Dark	Up	26.5	145.4	Low	10:00:58 - 10:30:58	4181
Toppenish/White Swan	10:15:59	-47.9	Dark	Up	26.8	145.5	Low	10:00:59 - 10:30:59	4170
The Dalles	10:16:05	-48.8	Dark	Up	27.1	144.5	Low	10:01:05 - 10:31:05	4086
Maupin	10:16:06	-49.1	Dark	Up	27.5	144.5	Low	10:01:06 - 10:31:06	4058
Sisters	10:16:11	-49.9	Dark	Up	28.0	143.7	Low	10:01:11 - 10:31:11	3975
Bend	10:16:09	-50.0	Dark	Up	28.3	143.9	Low	10:01:09 - 10:31:09	3966
Oregon Observatory	10:16:11	-50.1	Dark	Up	28.4	143.7	Low	10:01:11 - 10:31:11	3948
Chiloquin	10:16:17	-51.2	Dark	Up	29.3	142.9	Low	10:01:17 - 10:31:17	3831
Cedarville	10:16:03	-51.0	Dark	Up	30.8	144.2	Up	10:01:03 - 10:31:03	3807
Klamath Falls	10:16:13	-51.4	Dark	Up	29.6	142.9	Low	10:01:13 - 10:31:13	3806
Fall River/Burney	10:16:14	-52.0	Dark	Up	30.7	142.9	Up	10:01:14 - 10:31:14	3725
Gimple	10:16:09	-52.2	Dark	Up	31.6	143.0	Up	10:01:09 - 10:31:09	3671
Greenville	10:16:11	-52.3	Dark	Up	31.6	143.0	Up	10:01:11 - 10:31:11	3668
Reno	10:16:04	-52.0	Dark	Up	32.6	143.9	Up	10:01:04 - 10:31:04	3660
Portola	10:16:07	-52.2	Dark	Up	32.1	143.3	Up	10:01:07 - 10:31:07	3658
Quincy	10:16:10	-52.4	Dark	Up	31.8	142.9	Up	10:01:10 - 10:31:10	3652
Yerington	10:15:58	-51.9	Dark	Up	33.3	144.3	Up	10:00:58 - 10:30:58	3639
Carson City	10:16:02	-52.2	Dark	Up	32.9	143.8	Up	10:01:02 - 10:31:02	3632
Hawthorne	10:15:53	-51.8	Dark	Up	33.9	144.7	Up	10:00:53 - 10:30:53	3620
Gardnerville	10:16:00	-52.3	Dark	Up	33.1	143.7	Up	10:01:00 - 10:31:00	3613
Lee Vining	10:15:57	-52.4	Dark	Up	34.2	144.0	Up	10:00:57 - 10:30:57	3556
Beatty	10:15:35	-51.5	Dark	Up	36.1	145.9	Up	10:00:35 - 10:30:35	3555
Patrick	10:15:06	-50.2	Dark	Up	38.5	148.4	Up	10:00:06 - 10:30:06	3541
Bishop	10:15:49	-52.3	Dark	Up	35.0	144.4	Up	10:00:49 - 10:30:49	3533
Laughlin/Bullhead City	10:15:17	-50.8	Dark	Up	38.5	147.5	Up	10:00:17 - 10:30:17	3494
George/Scottsdale	10:14:45	-49.4	Dark	Up	40.8	149.9	Up	09:59:45 - 10:29:45	3478
Lake Havasu City	10:15:11	-50.9	Dark	Up	39.1	147.5	Up	10:00:11 - 10:30:11	3447
Idyllwild	10:15:34	-52.9	Dark	Up	38.7	144.6	Up	10:00:34 - 10:30:34	3291
Calipatria	10:15:21	-52.3	Dark	Up	39.7	145.6	Up	10:00:21 - 10:30:21	3285
Yuma	10:15:14	-51.8	Dark	Up	40.5	146.4	Up	10:00:14 - 10:30:14	3283
Wildwood	10:15:52	-54.1	Dark	Up	37.5	142.8	Up	10:00:52 - 10:30:52	3249

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 531076, (2028/02/15 09:54UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  8.09   9
95 Vir         14:06:42.6 -09:18:48  5.3  2.44   9
PPM 228049     13:56:36.0 -10:02:03  8.1  0.57   7
PPM 228088     13:58:14.7 -10:25:57  9.6  0.08   7
531076         13:58:00.4 -10:29:01 12.1         7
Positions are for J2000

Event circumstances last updated at 2023/03/27 23:21:52 UT

RECON