620 captures

19 Dec 1996 - 04 Feb 2024

Nov	JAN	Mar
	10
2018	2019	2020

success

fail

About this capture

COLLECTED BY

Organization: Archive Team

Formed in 2009, the Archive Team (not to be confused with the archive.org Archive-It Team) is a rogue archivist collective dedicated to saving copies of rapidly dying or deleted websites for the sake of history and digital heritage. The group is 100% composed of volunteers and interested parties, and has expanded into a large amount of related projects for saving online and digital history.

History is littered with hundreds of conflicts over the future of a community, group, location or business that were "resolved" when one of the parties stepped ahead and destroyed what was there. With the original point of contention destroyed, the debates would fall to the wayside. Archive Team believes that by duplicated condemned data, the conversation and debate can continue, as well as the richness and insight gained by keeping the materials. Our projects have ranged in size from a single volunteer downloading the data to a small-but-critical site, to over 100 volunteers stepping forward to acquire terabytes of user-created data to save for future generations.

The main site for Archive Team is at archiveteam.org and contains up to the date information on various projects, manifestos, plans and walkthroughs.

This collection contains the output of many Archive Team projects, both ongoing and completed. Thanks to the generous providing of disk space by the Internet Archive, multi-terabyte datasets can be made available, as well as in use by the Wayback Machine, providing a path back to lost websites and work.

Our collection has grown to the point of having sub-collections for the type of data we acquire. If you are seeking to browse the contents of these collections, the Wayback Machine is the best first stop. Otherwise, you are free to dig into the stacks to see what you may find.

The Archive Team Panic Downloads are full pulldowns of currently extant websites, meant to serve as emergency backups for needed sites that are in danger of closing, or which will be missed dearly if suddenly lost due to hard drive crashes or server failures.

Collection: ArchiveBot: The Archive Team Crowdsourced Crawler

ArchiveBot is an IRC bot designed to automate the archival of smaller websites (e.g. up to a few hundred thousand URLs). You give it a URL to start at, and it grabs all content under that URL, records it in a WARC, and then uploads that WARC to ArchiveTeam servers for eventual injection into the Internet Archive (or other archive sites).

To use ArchiveBot, drop by #archivebot on EFNet. To interact with ArchiveBot, you issue commands by typing it into the channel. Note you will need channel operator permissions in order to issue archiving jobs. The dashboard shows the sites being downloaded currently.

There is a dashboard running for the archivebot process at http://www.archivebot.com.

ArchiveBot's source code can be found at https://github.com/ArchiveTeam/ArchiveBot.

TIMESTAMPS

Neptune/Earth Comparison

Bulk parameters

Orbital parameters

Neptune Observational Parameters

Discoverer:      Johann Gottfried Galle  (based on predictions by  
                 John Couch Adams and Urbain Leverrier)
Discovery Date:  23 September 1846

Distance from Earth
        Minimum (106 km)         4305.9
        Maximum (106 km)         4687.3
Apparent diameter from Earth
        Maximum (seconds of arc)    2.4
        Minimum (seconds of arc)    2.2
Mean values at opposition from Earth
        Distance from Earth (106 km)       4347.31    
        Apparent diameter (seconds of arc)    2.3
        Apparent visual magnitude             7.7      
Maximum apparent visual magnitude             7.67

Neptune Mean Orbital Elements (J2000)

Semimajor axis (AU)                 30.06896348  
Orbital eccentricity                 0.00858587   
Orbital inclination (deg)            1.76917  
Longitude of ascending node (deg)  131.72169   
Longitude of perihelion (deg)       44.97135  
Mean Longitude (deg)               304.88003

North Pole of Rotation

Right Ascension: 299.36 + 0.70 sin N
Declination    :  43.46 - 0.51 cos N
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)
N = 357.85 + 52.316T degrees
T = Julian centuries from reference date 

Neptunian Magnetosphere

Dipole field strength: 0.142 Gauss-Rn3
Dipole tilt to rotational axis: 46.9 degrees
Longitude of tilt: 288 degrees (IAU convention)
Dipole offset: 0.485 Rn
Surface (1 Rn) field strength: ~0.1 - 0.9 Gauss

Neptunian Atmosphere

Surface Pressure: >>1000 bars  
Temperature at 1 bar: 72 K (-201 C)
Temperature at 0.1 bar: 55 K (-218 C)
Density at 1 bar: 0.45 kg/m3
Wind speeds: 0-580 m/s
Scale height: 19.1 - 20.3 km
Mean molecular weight: 2.53 - 2.69 
Atmospheric composition (by volume, uncertainty in parentheses)
    Major:       Molecular hydrogen (H2) - 80.0% (3.2%); Helium (He) - 19.0% (3.2%);
                 Methane (CH4) 1.5% (0.5%)
    Minor (ppm): Hydrogen Deuteride (HD) - 192; Ethane (C2H6) - 1.5
    Aerosols:    Ammonia ice, water ice, ammonia hydrosulfide, methane ice(?)

Notes on the factsheets

Neptunian Satellite Fact Sheet

Neptunian Rings Fact Sheet

Planetary Fact Table

Planetary Fact Table

Planetary Fact Table

Neptune Home Page

Directory to other Planetary Fact Sheets

NASA Official: Ed Grayzeck, edwin.j.grayzeck@nasa.gov
Last Updated: 27 September 2018, DRW