RECON: TNO occultation with 385527

Event between (385527) 04OK14 and star GA0820:22401047 with event index number of 2259308

Geocentric closest approach at 2028/09/28 07:03:44 UTC

J2000 position of star is 23:03:25.9 -07:06:04
Equinox of date position of star is 23:04:40.1 -06:58:21
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 37 degrees from the moon. Moon is 76% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 33.3 AU from the Sun and 32.3 AU from the Earth.
Apparent velocity is 21.8 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 361 seconds.
The 1-sigma cross-track error in the shadow position is 4332 km.
The sky-plane scale is 23441.6 km/arcsec.

The object has an absolute magnitude Hv=7.5
Diameter=195.0 km assuming a 5% albedo -- 8.8 sec chord
Diameter=79.6 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 7:4EEE
 
 
 
 
 
 

Star training set for 385527, (2028/09/28 07:01UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:13.8 -29:28:09  1.2 22.56  35
Markab         23:06:11.7 +15:21:38  2.5 22.31  49
81 Aqr         23:02:53.2 -06:54:23  6.1  0.51  37
PPM 207054     23:03:15.4 -06:48:20  8.0  0.44  37
PPM 207091     23:04:34.7 -06:56:51  9.5  0.09  37
385527         23:04:55.4 -06:56:45 16.2        38
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 2.5 sigma about the mid-time.
The median site spacing is 25.0 km RECON observability=1.0 and success probability=8.4%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	07:01:49	-40.4	Dark	Up	31.9	188.0	Up	06:46:49 - 07:16:49	4344
Victoria	07:02:00	-41.8	Dark	Up	34.3	184.6	Up	06:47:00 - 07:17:00	4303
Peachland	07:01:47	-41.4	Dark	Up	32.8	188.8	Up	06:46:47 - 07:16:47	4272
Kelowna	07:01:47	-41.4	Dark	Up	32.6	189.1	Up	06:46:47 - 07:16:47	4270
Summerland	07:01:48	-41.6	Dark	Up	32.9	188.9	Up	06:46:48 - 07:16:48	4260
Penticton	07:01:48	-41.7	Dark	Up	33.0	189.0	Up	06:46:48 - 07:16:48	4253
Oliver	07:01:47	-42.0	Dark	Up	33.3	189.1	Up	06:46:47 - 07:16:47	4232
Anarchist Mountain Observatory	07:01:47	-42.2	Dark	Up	33.5	189.3	Up	06:46:47 - 07:16:47	4216
Okanogan	07:01:48	-42.8	Dark	Up	34.1	189.1	Up	06:46:48 - 07:16:48	4182
Brewster	07:01:50	-43.0	Dark	Up	34.4	188.9	Up	06:46:50 - 07:16:50	4171
Manson/Chelan	07:01:50	-43.1	Dark	Up	34.7	188.5	Up	06:46:50 - 07:16:50	4169
Wenatchee	07:01:51	-43.6	Dark	Up	35.2	188.3	Up	06:46:51 - 07:16:51	4144
Ellensburg	07:01:53	-43.9	Dark	Up	35.6	188.1	Up	06:46:53 - 07:16:53	4124
Yakima	07:01:52	-44.3	Dark	Up	36.0	188.1	Up	06:46:52 - 07:16:52	4099
Toppenish/White Swan	07:01:52	-44.5	Dark	Up	36.2	188.4	Up	06:46:52 - 07:16:52	4079
The Dalles	07:01:56	-45.1	Dark	Up	37.0	187.5	Up	06:46:56 - 07:16:56	4053
Sleaford	07:01:08	-40.2	Dark	Up	28.1	203.9	Low	06:46:08 - 07:16:08	4028
Maupin	07:01:55	-45.5	Dark	Up	37.4	187.7	Up	06:46:55 - 07:16:55	4022
PNWRO	07:01:47	-45.2	Dark	Up	36.4	190.2	Up	06:46:47 - 07:16:47	4009
Sisters	07:01:57	-46.2	Dark	Up	38.4	187.1	Up	06:46:57 - 07:16:57	3980
Bend	07:01:57	-46.5	Dark	Up	38.6	187.5	Up	06:46:57 - 07:16:57	3956
Oregon Observatory	07:01:58	-46.7	Dark	Up	38.7	187.4	Up	06:46:58 - 07:16:58	3948
Chiloquin	07:02:01	-47.8	Dark	Up	40.1	187.0	Up	06:47:01 - 07:17:01	3872
Klamath Falls	07:02:01	-48.1	Dark	Up	40.4	187.1	Up	06:47:01 - 07:17:01	3845
Fall River/Burney	07:02:00	-49.3	Dark	Up	41.6	187.7	Up	06:47:00 - 07:17:00	3749
Cedarville	07:01:55	-49.2	Dark	Up	40.9	189.3	Up	06:46:55 - 07:16:55	3743
Greenville	07:02:00	-50.3	Dark	Up	42.4	188.4	Up	06:47:00 - 07:17:00	3669
Gimple	07:02:00	-50.3	Dark	Up	42.4	188.6	Up	06:47:00 - 07:17:00	3666
Quincy	07:02:01	-50.5	Dark	Up	42.6	188.5	Up	06:47:01 - 07:17:01	3654
Portola	07:01:59	-50.7	Dark	Up	42.7	189.1	Up	06:46:59 - 07:16:59	3629
Reno	07:01:56	-51.2	Dark	Up	42.9	190.0	Up	06:46:56 - 07:16:56	3587
Carson City	07:01:57	-51.5	Dark	Up	43.2	190.1	Up	06:46:57 - 07:16:57	3560
Gardnerville	07:01:56	-51.7	Dark	Up	43.4	190.2	Up	06:46:56 - 07:16:56	3540
Yerington	07:01:55	-51.8	Dark	Up	43.3	191.0	Up	06:46:55 - 07:16:55	3523
Hawthorne	07:01:53	-52.4	Dark	Up	43.7	191.8	Up	06:46:53 - 07:16:53	3470
Lee Vining	07:01:56	-52.8	Dark	Up	44.3	191.2	Up	06:46:56 - 07:16:56	3445
Bishop	07:01:54	-53.6	Dark	Up	44.8	192.4	Up	06:46:54 - 07:16:54	3373
Beatty	07:01:48	-54.4	Dark	Up	44.9	194.7	Up	06:46:48 - 07:16:48	3279
Dunrhomin	07:01:07	-51.9	Dark	Up	38.5	208.2	Up	06:46:07 - 07:16:07	3139
Nikitin	07:01:06	-52.1	Dark	Up	38.7	208.2	Up	06:46:06 - 07:16:06	3125
CU-SBO	07:01:07	-52.2	Dark	Up	38.8	208.1	Up	06:46:07 - 07:16:07	3123
Wildwood	07:01:57	-56.6	Dark	Up	48.0	192.8	Up	06:46:57 - 07:16:57	3122
Laughlin/Bullhead City	07:01:41	-56.5	Dark	Up	46.1	198.2	Up	06:46:41 - 07:16:41	3061
Patrick	07:01:39	-56.4	Dark	Up	45.7	199.0	Up	06:46:39 - 07:16:39	3055
Idyllwild	07:01:51	-57.4	Dark	Up	48.0	195.6	Up	06:46:51 - 07:16:51	3023
Lake Havasu City	07:01:42	-57.2	Dark	Up	46.7	198.7	Up	06:46:42 - 07:16:42	2997
Calipatria	07:01:47	-58.3	Dark	Up	48.3	197.5	Up	06:46:47 - 07:16:47	2928
Yuma	07:01:44	-58.9	Dark	Up	48.5	198.9	Up	06:46:44 - 07:16:44	2859
George/Scottsdale	07:01:32	-58.3	Dark	Up	46.7	202.4	Up	06:46:32 - 07:16:32	2841

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 385527, (2028/09/28 07:01UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.7 -29:37:24  1.2 22.56  35
Markab         23:04:45.8 +15:12:18  2.5 22.31  49
81 Aqr         23:01:23.6 -07:03:40  6.1  0.51  37
PPM 207054     23:01:45.9 -06:57:38  8.0  0.44  37
PPM 207091     23:03:05.1 -07:06:10  9.5  0.09  37
385527         23:03:25.9 -07:06:04 16.2        37
Positions are for J2000

Event circumstances last updated at 2023/10/28 00:57:42 UT

RECON