RECON: TNO occultation with 500885

Event between (500885) 13JL65 and star GA0740:06702595 with event index number of 266557

Geocentric closest approach at 2020/05/14 07:42:56 UTC

J2000 position of star is 17:02:35.8 -15:44:32
Equinox of date position of star is 17:03:40.6 -15:46:05
Stellar brightness G=16.3, use SENSEUP=128
Star is 66 degrees from the moon. Moon is 53% illuminated.
TNO apparent brightness V=24.6

[RECON map]
TNO is 36.3 AU from the Sun and 35.4 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 458 seconds.
The 1-sigma cross-track error in the shadow position is 2743 km.
The sky-plane scale is 25689.6 km/arcsec.

The TNO has an absolute magnitude Hv=9.0
Diameter=95.5 km assuming a 5% albedo -- 4.3 sec chord
Diameter=39.0 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is 3:2E

Star training set for 500885, (2020/05/14 07:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.6 -26:28:32  0.9 13.19  71
35Eta Oph      17:11:32.9 -15:44:56  2.6  1.87  64
PPM 232348     16:57:12.5 -16:50:13  6.3  1.90  67
PPM 232432     17:00:33.6 -16:05:38  7.9  0.84  66
PPM 232519     17:04:17.0 -15:54:00  9.4  0.18  66
500885         17:03:45.9 -15:46:12 16.3        65
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 2.0 sigma about the mid-time.
The median site spacing is 13.7 km RECON observability=1.0 and success probability=7.2%

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

Kelowna 07:44:57 -21.3 Dark Down 20.4 153.0 Low 07:29:57 - 07:59:57 3948

Summerland 07:44:58 -21.3 Dark Down 20.3 152.6 Low 07:29:58 - 07:59:58 3939

Penticton 07:44:58 -21.7 Dark Down 20.7 152.7 Low 07:29:58 - 07:59:58 3925

Okanagan Falls 07:44:58 -21.9 Dark Down 20.8 152.7 Low 07:29:58 - 07:59:58 3914

Oliver 07:44:58 -22.0 Dark Down 21.0 152.7 Low 07:29:58 - 07:59:58 3906

Anarchist Mountain Observatory 07:44:58 -22.2 Dark Down 21.2 152.8 Low 07:29:58 - 07:59:58 3900

Oroville 07:44:57 -22.3 Dark Down 21.2 152.7 Low 07:29:57 - 07:59:57 3894

Tonasket 07:44:58 -22.5 Dark Down 21.4 152.7 Low 07:29:58 - 07:59:58 3882

Okanogan 07:44:59 -22.8 Dark Down 21.7 152.5 Low 07:29:59 - 07:59:59 3860

Brewster 07:45:00 -23.1 Dark Down 21.9 152.3 Low 07:30:00 - 08:00:00 3841

Manson/Chelan 07:45:01 -23.3 Dark Down 21.9 151.9 Low 07:30:01 - 08:00:01 3822

Entiat 07:45:02 -23.5 Dark Down 22.1 151.8 Low 07:30:02 - 08:00:02 3808

Wenatchee 07:45:03 -23.8 Dark Down 22.3 151.6 Low 07:30:03 - 08:00:03 3792

Ellensburg 07:45:03 -24.2 Dark Down 22.6 151.3 Low 07:30:03 - 08:00:03 3764

Pasco 07:45:01 -25.0 Dark Down 23.7 152.6 Low 07:30:01 - 08:00:01 3748

Yakima 07:45:05 -24.6 Dark Down 23.0 151.2 Low 07:30:05 - 08:00:05 3739

PNWRO 07:45:00 -25.2 Dark Down 24.0 152.7 Low 07:30:00 - 08:00:00 3737

Toppenish/White Swan 07:45:05 -24.8 Dark Down 23.2 151.3 Low 07:30:05 - 08:00:05 3730

George/Umatilla 07:45:01 -25.3 Dark Down 23.9 152.3 Low 07:30:01 - 08:00:01 3723

Goldendale 07:45:06 -25.3 Dark Down 23.5 150.8 Low 07:30:06 - 08:00:06 3688

The Dalles 07:45:08 -25.5 Dark Down 23.6 150.4 Low 07:30:08 - 08:00:08 3668

Maupin 07:45:08 -26.0 Dark Down 24.0 150.4 Low 07:30:08 - 08:00:08 3644

Niwot 07:44:19 -30.1 Dark Down 33.0 165.9 Up 07:29:19 - 07:59:19 3627

Madras/Culver 07:45:08 -26.5 Dark Down 24.5 150.3 Low 07:30:08 - 08:00:08 3609

Redmond 07:45:10 -26.9 Dark Down 24.8 150.1 Low 07:30:10 - 08:00:10 3586

Sisters 07:45:10 -26.8 Dark Down 24.6 149.8 Low 07:30:10 - 08:00:10 3579

Bend 07:45:10 -27.1 Dark Down 24.9 149.9 Low 07:30:10 - 08:00:10 3570

Oregon Observatory 07:45:10 -27.2 Dark Down 25.0 149.8 Low 07:30:10 - 08:00:10 3556

La Pine/Gilchrist 07:45:11 -27.4 Dark Down 25.2 149.7 Low 07:30:11 - 08:00:11 3542

North Lake 07:45:10 -27.9 Dark Down 25.8 150.2 Low 07:30:10 - 08:00:10 3526

Paisley 07:45:09 -28.5 Dark Down 26.4 150.4 Low 07:30:09 - 08:00:09 3498

Lakeview 07:45:09 -29.0 Dark Down 26.9 150.5 Low 07:30:09 - 08:00:09 3469

Chiloquin 07:45:13 -28.5 Dark Down 26.0 149.1 Low 07:30:13 - 08:00:13 3462

Klamath Falls 07:45:13 -28.9 Dark Down 26.3 149.1 Low 07:30:13 - 08:00:13 3442

Tulelake 07:45:13 -29.2 Dark Down 26.7 149.3 Low 07:30:13 - 08:00:13 3430

Cedarville 07:45:09 -29.6 Dark Down 27.5 150.5 Low 07:30:09 - 08:00:09 3430

Fall River/Burney 07:45:14 -30.1 Dark Down 27.5 149.1 Low 07:30:14 - 08:00:14 3371

Susanville 07:45:12 -30.7 Dark Down 28.3 149.7 Low 07:30:12 - 08:00:12 3344

Gimple 07:45:13 -31.0 Dark Down 28.5 149.4 Low 07:30:13 - 08:00:13 3321

Greenville 07:45:13 -31.0 Dark Down 28.4 149.3 Low 07:30:13 - 08:00:13 3319

Portola 07:45:12 -31.3 Dark Down 28.9 149.7 Low 07:30:12 - 08:00:12 3307

Quincy 07:45:13 -31.2 Dark Down 28.6 149.3 Low 07:30:13 - 08:00:13 3305

Reno 07:45:10 -31.6 Dark Down 29.4 150.3 Low 07:30:10 - 08:00:10 3302

Yerington 07:45:08 -32.2 Dark Down 30.1 150.8 Up 07:30:08 - 08:00:08 3278

Carson City 07:45:10 -32.0 Dark Down 29.7 150.2 Low 07:30:10 - 08:00:10 3278

Gardnerville 07:45:10 -32.2 Dark Down 29.9 150.2 Low 07:30:10 - 08:00:10 3262

Hawthorne 07:45:07 -32.7 Dark Down 30.7 151.2 Up 07:30:07 - 08:00:07 3257

Tonopah 07:45:03 -33.2 Dark Down 31.6 152.5 Up 07:30:03 - 08:00:03 3255

Lee Vining 07:45:10 -33.2 Dark Down 31.0 150.5 Up 07:30:10 - 08:00:10 3206

Beatty 07:45:02 -34.3 Dark Down 32.8 152.7 Up 07:30:02 - 08:00:02 3182

Indian Springs 07:44:58 -34.6 Dark Down 33.5 153.7 Up 07:29:58 - 07:59:58 3182

Bishop 07:45:07 -33.9 Dark Down 31.8 151.1 Up 07:30:07 - 08:00:07 3180

Henderson 07:44:56 -35.2 Dark Down 34.2 154.3 Up 07:29:56 - 07:59:56 3158

Patrick 07:44:52 -35.7 Dark Down 35.2 155.3 Up 07:29:52 - 07:59:52 3136

Lone Pine 07:45:07 -34.6 Dark Down 32.6 151.2 Up 07:30:07 - 08:00:07 3132

DCO 07:44:50 -36.0 Dark Down 35.7 156.0 Up 07:29:50 - 07:59:50 3128

Searchlight/Boulder City 07:44:56 -35.7 Dark Down 34.8 154.2 Up 07:29:56 - 07:59:56 3117

Kingman/Dolan Springs 07:44:54 -36.0 Dark Down 35.3 155.0 Up 07:29:54 - 07:59:54 3115

Laughlin/Bullhead City 07:44:55 -36.0 Dark Down 35.2 154.5 Up 07:29:55 - 07:59:55 3103

Mohave Valley 07:44:56 -36.3 Dark Down 35.4 154.4 Up 07:29:56 - 07:59:56 3083

Lake Havasu City 07:44:55 -36.7 Dark Down 35.9 154.5 Up 07:29:55 - 07:59:55 3058

Parker 07:44:55 -37.0 Dark Down 36.2 154.5 Up 07:29:55 - 07:59:55 3032

Blythe 07:44:57 -37.6 Dark Down 36.6 154.0 Up 07:29:57 - 07:59:57 2986

CPSLO 07:45:17 -35.8 Dark Down 32.7 148.2 Up 07:30:17 - 08:00:17 2977

Idyllwild 07:45:04 -37.5 Dark Down 35.7 151.7 Up 07:30:04 - 08:00:04 2948

Wildwood 07:45:11 -37.1 Dark Down 34.6 149.9 Up 07:30:11 - 08:00:11 2932

Calipatria 07:45:00 -38.1 Dark Down 36.7 152.8 Up 07:30:00 - 08:00:00 2928

Yuma 07:44:57 -38.5 Dark Down 37.4 153.6 Up 07:29:57 - 07:59:57 2915

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 500885, (2020/05/14 07:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.19  71
35Eta Oph      17:10:22.7 -15:43:29  2.6  1.87  64
PPM 232348     16:56:02.0 -16:48:22  6.3  1.90  67
PPM 232432     16:59:23.4 -16:03:52  7.9  0.84  66
PPM 232519     17:03:06.9 -15:52:21  9.4  0.18  66
500885         17:02:35.8 -15:44:32 16.3        66
Positions are for J2000

Event circumstances last updated at 2018/10/26 21:06:10 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)
Kelowna	07:44:57	-21.3	Dark	Down	20.4	153.0	Low	07:29:57 - 07:59:57	3948
Summerland	07:44:58	-21.3	Dark	Down	20.3	152.6	Low	07:29:58 - 07:59:58	3939
Penticton	07:44:58	-21.7	Dark	Down	20.7	152.7	Low	07:29:58 - 07:59:58	3925
Okanagan Falls	07:44:58	-21.9	Dark	Down	20.8	152.7	Low	07:29:58 - 07:59:58	3914
Oliver	07:44:58	-22.0	Dark	Down	21.0	152.7	Low	07:29:58 - 07:59:58	3906
Anarchist Mountain Observatory	07:44:58	-22.2	Dark	Down	21.2	152.8	Low	07:29:58 - 07:59:58	3900
Oroville	07:44:57	-22.3	Dark	Down	21.2	152.7	Low	07:29:57 - 07:59:57	3894
Tonasket	07:44:58	-22.5	Dark	Down	21.4	152.7	Low	07:29:58 - 07:59:58	3882
Okanogan	07:44:59	-22.8	Dark	Down	21.7	152.5	Low	07:29:59 - 07:59:59	3860
Brewster	07:45:00	-23.1	Dark	Down	21.9	152.3	Low	07:30:00 - 08:00:00	3841
Manson/Chelan	07:45:01	-23.3	Dark	Down	21.9	151.9	Low	07:30:01 - 08:00:01	3822
Entiat	07:45:02	-23.5	Dark	Down	22.1	151.8	Low	07:30:02 - 08:00:02	3808
Wenatchee	07:45:03	-23.8	Dark	Down	22.3	151.6	Low	07:30:03 - 08:00:03	3792
Ellensburg	07:45:03	-24.2	Dark	Down	22.6	151.3	Low	07:30:03 - 08:00:03	3764
Pasco	07:45:01	-25.0	Dark	Down	23.7	152.6	Low	07:30:01 - 08:00:01	3748
Yakima	07:45:05	-24.6	Dark	Down	23.0	151.2	Low	07:30:05 - 08:00:05	3739
PNWRO	07:45:00	-25.2	Dark	Down	24.0	152.7	Low	07:30:00 - 08:00:00	3737
Toppenish/White Swan	07:45:05	-24.8	Dark	Down	23.2	151.3	Low	07:30:05 - 08:00:05	3730
George/Umatilla	07:45:01	-25.3	Dark	Down	23.9	152.3	Low	07:30:01 - 08:00:01	3723
Goldendale	07:45:06	-25.3	Dark	Down	23.5	150.8	Low	07:30:06 - 08:00:06	3688
The Dalles	07:45:08	-25.5	Dark	Down	23.6	150.4	Low	07:30:08 - 08:00:08	3668
Maupin	07:45:08	-26.0	Dark	Down	24.0	150.4	Low	07:30:08 - 08:00:08	3644
Niwot	07:44:19	-30.1	Dark	Down	33.0	165.9	Up	07:29:19 - 07:59:19	3627
Madras/Culver	07:45:08	-26.5	Dark	Down	24.5	150.3	Low	07:30:08 - 08:00:08	3609
Redmond	07:45:10	-26.9	Dark	Down	24.8	150.1	Low	07:30:10 - 08:00:10	3586
Sisters	07:45:10	-26.8	Dark	Down	24.6	149.8	Low	07:30:10 - 08:00:10	3579
Bend	07:45:10	-27.1	Dark	Down	24.9	149.9	Low	07:30:10 - 08:00:10	3570
Oregon Observatory	07:45:10	-27.2	Dark	Down	25.0	149.8	Low	07:30:10 - 08:00:10	3556
La Pine/Gilchrist	07:45:11	-27.4	Dark	Down	25.2	149.7	Low	07:30:11 - 08:00:11	3542
North Lake	07:45:10	-27.9	Dark	Down	25.8	150.2	Low	07:30:10 - 08:00:10	3526
Paisley	07:45:09	-28.5	Dark	Down	26.4	150.4	Low	07:30:09 - 08:00:09	3498
Lakeview	07:45:09	-29.0	Dark	Down	26.9	150.5	Low	07:30:09 - 08:00:09	3469
Chiloquin	07:45:13	-28.5	Dark	Down	26.0	149.1	Low	07:30:13 - 08:00:13	3462
Klamath Falls	07:45:13	-28.9	Dark	Down	26.3	149.1	Low	07:30:13 - 08:00:13	3442
Tulelake	07:45:13	-29.2	Dark	Down	26.7	149.3	Low	07:30:13 - 08:00:13	3430
Cedarville	07:45:09	-29.6	Dark	Down	27.5	150.5	Low	07:30:09 - 08:00:09	3430
Fall River/Burney	07:45:14	-30.1	Dark	Down	27.5	149.1	Low	07:30:14 - 08:00:14	3371
Susanville	07:45:12	-30.7	Dark	Down	28.3	149.7	Low	07:30:12 - 08:00:12	3344
Gimple	07:45:13	-31.0	Dark	Down	28.5	149.4	Low	07:30:13 - 08:00:13	3321
Greenville	07:45:13	-31.0	Dark	Down	28.4	149.3	Low	07:30:13 - 08:00:13	3319
Portola	07:45:12	-31.3	Dark	Down	28.9	149.7	Low	07:30:12 - 08:00:12	3307
Quincy	07:45:13	-31.2	Dark	Down	28.6	149.3	Low	07:30:13 - 08:00:13	3305
Reno	07:45:10	-31.6	Dark	Down	29.4	150.3	Low	07:30:10 - 08:00:10	3302
Yerington	07:45:08	-32.2	Dark	Down	30.1	150.8	Up	07:30:08 - 08:00:08	3278
Carson City	07:45:10	-32.0	Dark	Down	29.7	150.2	Low	07:30:10 - 08:00:10	3278
Gardnerville	07:45:10	-32.2	Dark	Down	29.9	150.2	Low	07:30:10 - 08:00:10	3262
Hawthorne	07:45:07	-32.7	Dark	Down	30.7	151.2	Up	07:30:07 - 08:00:07	3257
Tonopah	07:45:03	-33.2	Dark	Down	31.6	152.5	Up	07:30:03 - 08:00:03	3255
Lee Vining	07:45:10	-33.2	Dark	Down	31.0	150.5	Up	07:30:10 - 08:00:10	3206
Beatty	07:45:02	-34.3	Dark	Down	32.8	152.7	Up	07:30:02 - 08:00:02	3182
Indian Springs	07:44:58	-34.6	Dark	Down	33.5	153.7	Up	07:29:58 - 07:59:58	3182
Bishop	07:45:07	-33.9	Dark	Down	31.8	151.1	Up	07:30:07 - 08:00:07	3180
Henderson	07:44:56	-35.2	Dark	Down	34.2	154.3	Up	07:29:56 - 07:59:56	3158
Patrick	07:44:52	-35.7	Dark	Down	35.2	155.3	Up	07:29:52 - 07:59:52	3136
Lone Pine	07:45:07	-34.6	Dark	Down	32.6	151.2	Up	07:30:07 - 08:00:07	3132
DCO	07:44:50	-36.0	Dark	Down	35.7	156.0	Up	07:29:50 - 07:59:50	3128
Searchlight/Boulder City	07:44:56	-35.7	Dark	Down	34.8	154.2	Up	07:29:56 - 07:59:56	3117
Kingman/Dolan Springs	07:44:54	-36.0	Dark	Down	35.3	155.0	Up	07:29:54 - 07:59:54	3115
Laughlin/Bullhead City	07:44:55	-36.0	Dark	Down	35.2	154.5	Up	07:29:55 - 07:59:55	3103
Mohave Valley	07:44:56	-36.3	Dark	Down	35.4	154.4	Up	07:29:56 - 07:59:56	3083
Lake Havasu City	07:44:55	-36.7	Dark	Down	35.9	154.5	Up	07:29:55 - 07:59:55	3058
Parker	07:44:55	-37.0	Dark	Down	36.2	154.5	Up	07:29:55 - 07:59:55	3032
Blythe	07:44:57	-37.6	Dark	Down	36.6	154.0	Up	07:29:57 - 07:59:57	2986
CPSLO	07:45:17	-35.8	Dark	Down	32.7	148.2	Up	07:30:17 - 08:00:17	2977
Idyllwild	07:45:04	-37.5	Dark	Down	35.7	151.7	Up	07:30:04 - 08:00:04	2948
Wildwood	07:45:11	-37.1	Dark	Down	34.6	149.9	Up	07:30:11 - 08:00:11	2932
Calipatria	07:45:00	-38.1	Dark	Down	36.7	152.8	Up	07:30:00 - 08:00:00	2928
Yuma	07:44:57	-38.5	Dark	Down	37.4	153.6	Up	07:29:57 - 07:59:57	2915