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The Event^Horizon 2018/02/02

3 Feb 2018, 20:45 UTC
The Event^Horizon 2018/02/02
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Featuring Skyguides Marty Kunz and John Foote – Skyguide Nick Evetts will return in two weeks!
http://www.lunar-occultations.co​m/iota/bstar/bstar.htm

http://asa.usno.navy.mil/

https://www.nasa.gov/feature/god​dard/2018/nasa-s-newly-rediscover​ed-image-mission-provided-key-aur​ora-research

Hubble Space Telescope

Mission type
Astronomy

Operator
NASA · ESA · STScI

COSPAR ID
1990-037B

SATCAT no.
20580

Website
nasa.gov/hubble
hubblesite.org
spacetelescope.org

Mission duration
Elapsed: 27 years, 9 months, 9 days

Spacecraft properties

Manufacturer
Lockheed (spacecraft)
Perkin-Elmer (optics)

Launch mass
11,110 kg (24,490 lb)[1]

Dimensions
13.2 m × 4.2 m (43.3 ft × 13.8 ft)[1]

Power
2,800 watts

Start of mission

Launch date
April 24, 1990, 12:33:51 UTC[2]

Rocket
Space Shuttle Discovery (STS-31)

Launch site
Kennedy LC-39B

Deployment date
April 25, 1990[1]

Entered service
May 20, 1990[1]

End of mission

Decay date
estimated 2030–2040[3]

Orbital parameters

Reference system
Geocentric

Regime
Low Earth

Semi-major axis
6,917.5 km (4,298.3 mi)

Eccentricity
0.000287

Perigee
537.4 km (333.9 mi)

Apogee
541.4 km (336.4 mi)

Inclination
28.47°

Period
95.47 minutes 1.35.25.83

RAAN
176.23°

Argument of perigee
82.61°

Mean anomaly
319.41°

Mean motion
15.09 rev/day

Velocity
7.59 km/s (4.72 mi/s)

Epoch
December 26, 2017, 13:18:33 UTC[4]

Revolution no.
31,936

Main telescope

Type
Ritchey–Chrétien reflector

Diameter
2.4 m (7.9 ft)

Focal length
57.6 m (189 ft)

Focal ratio
f/24

Collecting area
4.5 m2 (48 sq ft)[5]

Wavelengths
Near-infrared, visible light, ultraviolet

[hide]Instruments

NICMOS
Near Infrared Camera and Multi-Object Spectrometer

ACS
Advanced Camera for Surveys

WFC3
Wide Field Camera 3

COS
Cosmic Origins Spectrograph

STIS
Space Telescope Imaging Spectrograph

FGS
Fine Guidance Sensor

http://www.stsci.edu/public/hst_​status/2018_reports.html

https://scitechdaily.com/new-dis​covery-challenges-popular-theory-​about-dwarf-galaxies/

http://www.sciencemag.org/news/2​018/02/these-synchronized-galaxie​s-are-upending-what-we-know-about​-universe

https://newsstand.google.com/articles/CAIiEKqoMwLuIAouvPW0OJa0FLYqFQgEKg0IACoGCAowlIECMLBMMJ-mHg

https://www.symmetrymagazine.org​/article/rivers-in-the-sky

https://scitechdaily.com/observa​tions-of-massive-galaxies-in-the-​early-universe-reveal-rare-dark-m​atter-haloes/

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