RECON: TNO occultation with 447178

Event between (447178) 05RO43 and star GA0720:03732510 with event index number of 2291074

Geocentric closest approach at 2027/03/01 05:24:55 UTC

J2000 position of star is 08:16:40.3 -16:02:32
Equinox of date position of star is 08:17:47.3 -16:07:06
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 119 degrees from the moon. Moon is 41% illuminated.
Apparent brightness V=19.1

[RECON map]
Object is 14.8 AU from the Sun and 14.1 AU from the Earth.
Apparent velocity is 20.3 km/sec on the sky relative to the star, or, 7.1 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 1435 km.
The sky-plane scale is 10219.5 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=208.9 km assuming a 5% albedo -- 11.0 sec chord
Diameter=85.3 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is CENTAURR

Star training set for 447178, (2027/03/01 05:25UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:20.8 -16:45:14 -1.5 21.95 131
15Rho Pup      08:08:42.1 -24:23:03  2.8  8.53 114
20 Pup         08:14:34.9 -15:52:18  5.0  0.84 120
PPM 219888     08:17:42.9 -16:24:22  7.7  0.28 119
PPM 219899     08:18:07.6 -16:19:23  8.9  0.20 119
447178         08:17:55.2 -16:07:39 15.8       119
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 5.0 sigma about the mid-time.
The median site spacing is 6.6 km RECON observability=1.0 and success probability=16.0%

Site Site mid-time
(UT) Sun alt
(deg) Sky Moon Star alt
(deg) Star az
(deg) Target Observing Time
(UT) X-track
(km)

Sleaford 05:27:57 -40.4 Dark Down 21.2 191.0 Low 05:22:09 - 05:33:45 2726

Dunrhomin 05:27:29 -49.8 Dark Down 32.7 193.0 Up 05:21:41 - 05:33:17 2456

Nikitin 05:27:28 -49.9 Dark Down 32.9 193.0 Up 05:21:40 - 05:33:16 2449

CU-SBO 05:27:28 -49.9 Dark Down 33.0 192.9 Up 05:21:40 - 05:33:16 2442

Kelowna 05:28:27 -36.0 Dark Down 24.1 177.1 Low 05:22:39 - 05:34:15 2006

Penticton 05:28:26 -36.2 Dark Down 24.4 177.0 Low 05:22:38 - 05:34:14 1990

Kamloops 05:28:30 -35.1 Dark Down 23.2 176.2 Low 05:22:42 - 05:34:18 1988

Peachland 05:28:27 -35.9 Dark Down 24.2 176.8 Low 05:22:39 - 05:34:15 1987

Summerland 05:28:27 -36.1 Dark Down 24.3 176.9 Low 05:22:39 - 05:34:15 1986

Anarchist Mountain Observatory 05:28:26 -36.6 Dark Down 24.9 177.2 Low 05:22:38 - 05:34:14 1981

Oliver 05:28:26 -36.4 Dark Down 24.7 177.0 Low 05:22:38 - 05:34:14 1977

Okanogan 05:28:25 -36.9 Dark Down 25.5 177.0 Low 05:22:37 - 05:34:13 1946

Brewster 05:28:25 -36.9 Dark Down 25.8 176.7 Low 05:22:37 - 05:34:13 1925

Manson/Chelan 05:28:26 -36.8 Dark Down 26.0 176.3 Low 05:22:38 - 05:34:14 1897

PNWRO 05:28:19 -38.6 Dark Down 27.9 177.6 Low 05:22:31 - 05:34:07 1893

Wenatchee 05:28:25 -37.0 Dark Down 26.5 176.1 Low 05:22:37 - 05:34:13 1869

Ellensburg 05:28:25 -37.1 Dark Down 26.9 175.9 Low 05:22:37 - 05:34:13 1841

Toppenish/White Swan 05:28:24 -37.6 Dark Down 27.5 176.0 Low 05:22:36 - 05:34:12 1825

Yakima 05:28:25 -37.3 Dark Down 27.3 175.9 Low 05:22:37 - 05:34:13 1824

George/Scottsdale 05:27:32 -49.9 Dark Down 40.0 185.9 Up 05:21:44 - 05:33:20 1787

The Dalles 05:28:24 -37.5 Dark Down 28.2 175.1 Low 05:22:36 - 05:34:12 1748

Victoria 05:28:34 -34.7 Dark Down 25.2 172.9 Low 05:22:46 - 05:34:22 1747

Patrick 05:27:43 -47.6 Dark Down 38.5 183.3 Up 05:21:55 - 05:33:31 1739

Maupin 05:28:24 -37.8 Dark Down 28.7 175.2 Low 05:22:36 - 05:34:12 1737

Laughlin/Bullhead City 05:27:44 -47.3 Dark Down 38.8 182.5 Up 05:21:56 - 05:33:32 1682

Bend 05:28:22 -38.3 Dark Down 29.8 174.9 Low 05:22:34 - 05:34:10 1676

Sisters 05:28:24 -38.0 Dark Down 29.5 174.6 Low 05:22:36 - 05:34:12 1671

Lake Havasu City 05:27:42 -47.8 Dark Down 39.4 182.8 Up 05:21:54 - 05:33:30 1666

Oregon Observatory 05:28:22 -38.3 Dark Down 29.9 174.8 Low 05:22:34 - 05:34:10 1661

Cedarville 05:28:15 -40.3 Dark Down 32.3 176.0 Up 05:22:27 - 05:34:03 1630

Beatty 05:27:55 -44.9 Dark Down 37.1 179.8 Up 05:22:07 - 05:33:43 1626

Hawthorne 05:28:04 -42.8 Dark Down 35.4 177.7 Up 05:22:16 - 05:33:52 1586

Chiloquin 05:28:22 -38.7 Dark Down 31.2 174.2 Up 05:22:34 - 05:34:10 1577

Yerington 05:28:07 -42.2 Dark Down 34.9 177.1 Up 05:22:19 - 05:33:55 1575

Klamath Falls 05:28:21 -38.9 Dark Down 31.5 174.3 Up 05:22:33 - 05:34:09 1566

Reno 05:28:10 -41.5 Dark Down 34.3 176.3 Up 05:22:22 - 05:33:58 1560

Yuma 05:27:38 -48.5 Dark Down 41.2 182.4 Up 05:21:50 - 05:33:26 1556

Bishop 05:28:01 -43.5 Dark Down 36.6 177.9 Up 05:22:13 - 05:33:49 1545

Carson City 05:28:09 -41.7 Dark Down 34.7 176.3 Up 05:22:21 - 05:33:57 1544

Gardnerville 05:28:08 -41.9 Dark Down 34.9 176.4 Up 05:22:20 - 05:33:56 1536

Fall River/Burney 05:28:17 -39.7 Dark Down 32.7 174.6 Up 05:22:29 - 05:34:05 1534

Portola 05:28:12 -41.0 Dark Down 34.0 175.6 Up 05:22:24 - 05:34:00 1533

Lee Vining 05:28:05 -42.8 Dark Down 35.9 177.1 Up 05:22:17 - 05:33:53 1528

Gimple 05:28:14 -40.5 Dark Down 33.7 175.2 Up 05:22:26 - 05:34:02 1523

Calipatria 05:27:42 -47.6 Dark Down 40.8 181.3 Up 05:21:54 - 05:33:30 1519

Greenville 05:28:14 -40.5 Dark Down 33.7 175.1 Up 05:22:26 - 05:34:02 1518

Quincy 05:28:14 -40.6 Dark Down 33.9 175.1 Up 05:22:26 - 05:34:02 1509

Idyllwild 05:27:48 -46.5 Dark Down 40.2 179.8 Up 05:22:00 - 05:33:36 1473

Wildwood 05:27:54 -44.9 Dark Down 39.8 177.5 Up 05:22:06 - 05:33:42 1367

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 447178, (2027/03/01 05:25UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.0 -16:43:26 -1.5 21.95 131
15Rho Pup      08:07:32.5 -24:18:14  2.8  8.53 114
20 Pup         08:13:19.9 -15:47:18  5.0  0.84 120
PPM 219888     08:16:28.1 -16:19:16  7.7  0.28 119
PPM 219899     08:16:52.8 -16:14:16  8.9  0.20 119
447178         08:16:40.3 -16:02:32 15.8       119
Positions are for J2000

Event circumstances last updated at 2024/04/18 03:46:27 UT

Marc W. Buie, Southwest Research Institute

RECON

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	05:27:57	-40.4	Dark	Down	21.2	191.0	Low	05:22:09 - 05:33:45	2726
Dunrhomin	05:27:29	-49.8	Dark	Down	32.7	193.0	Up	05:21:41 - 05:33:17	2456
Nikitin	05:27:28	-49.9	Dark	Down	32.9	193.0	Up	05:21:40 - 05:33:16	2449
CU-SBO	05:27:28	-49.9	Dark	Down	33.0	192.9	Up	05:21:40 - 05:33:16	2442
Kelowna	05:28:27	-36.0	Dark	Down	24.1	177.1	Low	05:22:39 - 05:34:15	2006
Penticton	05:28:26	-36.2	Dark	Down	24.4	177.0	Low	05:22:38 - 05:34:14	1990
Kamloops	05:28:30	-35.1	Dark	Down	23.2	176.2	Low	05:22:42 - 05:34:18	1988
Peachland	05:28:27	-35.9	Dark	Down	24.2	176.8	Low	05:22:39 - 05:34:15	1987
Summerland	05:28:27	-36.1	Dark	Down	24.3	176.9	Low	05:22:39 - 05:34:15	1986
Anarchist Mountain Observatory	05:28:26	-36.6	Dark	Down	24.9	177.2	Low	05:22:38 - 05:34:14	1981
Oliver	05:28:26	-36.4	Dark	Down	24.7	177.0	Low	05:22:38 - 05:34:14	1977
Okanogan	05:28:25	-36.9	Dark	Down	25.5	177.0	Low	05:22:37 - 05:34:13	1946
Brewster	05:28:25	-36.9	Dark	Down	25.8	176.7	Low	05:22:37 - 05:34:13	1925
Manson/Chelan	05:28:26	-36.8	Dark	Down	26.0	176.3	Low	05:22:38 - 05:34:14	1897
PNWRO	05:28:19	-38.6	Dark	Down	27.9	177.6	Low	05:22:31 - 05:34:07	1893
Wenatchee	05:28:25	-37.0	Dark	Down	26.5	176.1	Low	05:22:37 - 05:34:13	1869
Ellensburg	05:28:25	-37.1	Dark	Down	26.9	175.9	Low	05:22:37 - 05:34:13	1841
Toppenish/White Swan	05:28:24	-37.6	Dark	Down	27.5	176.0	Low	05:22:36 - 05:34:12	1825
Yakima	05:28:25	-37.3	Dark	Down	27.3	175.9	Low	05:22:37 - 05:34:13	1824
George/Scottsdale	05:27:32	-49.9	Dark	Down	40.0	185.9	Up	05:21:44 - 05:33:20	1787
The Dalles	05:28:24	-37.5	Dark	Down	28.2	175.1	Low	05:22:36 - 05:34:12	1748
Victoria	05:28:34	-34.7	Dark	Down	25.2	172.9	Low	05:22:46 - 05:34:22	1747
Patrick	05:27:43	-47.6	Dark	Down	38.5	183.3	Up	05:21:55 - 05:33:31	1739
Maupin	05:28:24	-37.8	Dark	Down	28.7	175.2	Low	05:22:36 - 05:34:12	1737
Laughlin/Bullhead City	05:27:44	-47.3	Dark	Down	38.8	182.5	Up	05:21:56 - 05:33:32	1682
Bend	05:28:22	-38.3	Dark	Down	29.8	174.9	Low	05:22:34 - 05:34:10	1676
Sisters	05:28:24	-38.0	Dark	Down	29.5	174.6	Low	05:22:36 - 05:34:12	1671
Lake Havasu City	05:27:42	-47.8	Dark	Down	39.4	182.8	Up	05:21:54 - 05:33:30	1666
Oregon Observatory	05:28:22	-38.3	Dark	Down	29.9	174.8	Low	05:22:34 - 05:34:10	1661
Cedarville	05:28:15	-40.3	Dark	Down	32.3	176.0	Up	05:22:27 - 05:34:03	1630
Beatty	05:27:55	-44.9	Dark	Down	37.1	179.8	Up	05:22:07 - 05:33:43	1626
Hawthorne	05:28:04	-42.8	Dark	Down	35.4	177.7	Up	05:22:16 - 05:33:52	1586
Chiloquin	05:28:22	-38.7	Dark	Down	31.2	174.2	Up	05:22:34 - 05:34:10	1577
Yerington	05:28:07	-42.2	Dark	Down	34.9	177.1	Up	05:22:19 - 05:33:55	1575
Klamath Falls	05:28:21	-38.9	Dark	Down	31.5	174.3	Up	05:22:33 - 05:34:09	1566
Reno	05:28:10	-41.5	Dark	Down	34.3	176.3	Up	05:22:22 - 05:33:58	1560
Yuma	05:27:38	-48.5	Dark	Down	41.2	182.4	Up	05:21:50 - 05:33:26	1556
Bishop	05:28:01	-43.5	Dark	Down	36.6	177.9	Up	05:22:13 - 05:33:49	1545
Carson City	05:28:09	-41.7	Dark	Down	34.7	176.3	Up	05:22:21 - 05:33:57	1544
Gardnerville	05:28:08	-41.9	Dark	Down	34.9	176.4	Up	05:22:20 - 05:33:56	1536
Fall River/Burney	05:28:17	-39.7	Dark	Down	32.7	174.6	Up	05:22:29 - 05:34:05	1534
Portola	05:28:12	-41.0	Dark	Down	34.0	175.6	Up	05:22:24 - 05:34:00	1533
Lee Vining	05:28:05	-42.8	Dark	Down	35.9	177.1	Up	05:22:17 - 05:33:53	1528
Gimple	05:28:14	-40.5	Dark	Down	33.7	175.2	Up	05:22:26 - 05:34:02	1523
Calipatria	05:27:42	-47.6	Dark	Down	40.8	181.3	Up	05:21:54 - 05:33:30	1519
Greenville	05:28:14	-40.5	Dark	Down	33.7	175.1	Up	05:22:26 - 05:34:02	1518
Quincy	05:28:14	-40.6	Dark	Down	33.9	175.1	Up	05:22:26 - 05:34:02	1509
Idyllwild	05:27:48	-46.5	Dark	Down	40.2	179.8	Up	05:22:00 - 05:33:36	1473
Wildwood	05:27:54	-44.9	Dark	Down	39.8	177.5	Up	05:22:06 - 05:33:42	1367