The Event^Horizon 2018/02/02

February 3rd, 2018 by Nick Evetts

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/

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-infraredvisible lightultraviolet

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/

The Doctor

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