EV Lacertae

 EV Lacertae

 aka (UAS) Argelander 

16.5 LY from Sol - M-0 Galaxy, Upward Sector

The System has 5 Rock Type planets and a thinly populated asteroid belt. The system has been a United Earth system and was first surveyed for Earth by a joint Earth/ Saran Expedition in 2125 OTT.

None of the planets were Gardenworlds and only the second planet had a marginal biosphere of anerobic microbes.

The planets are: 1) Schoenfelds Planet, 2) Wilhelms Welt , 3) Aldalbert 4) Nicht-Bonn 5) Kruegers Ball

Named after Pre Astro scientists from the region Germany. Chief among them Friedrich Wilhelm August Argelander, who published a catalogue that became famous as the Bonner Durchmusterung (BD).

The first colonists arrived in 2133 OTT on planet Wilhelm's Welt.

Due to its close proximity to the Sol system, this system grew fast into a well developed industrial system, with a focus on heavy industry to feed the needs of first the United Earth and then the Union.

The System joined the Union as part of United Earth in 2222 OTT and is represnted as a system instead of individual planets. (It was the first system to do so)

Today there are 2 Class A space ports in the system. As of 5040 there is a Long Range Transmatter Tunnel connection to Sol Hub.
 * System population exceeds 12 billion
 * Main Import: Water, food. Lux and groceries
 * Main Export: Factories and factory equipment
 * Top Employer: Magdeburger Industries (Industry Outfitter)

Pre Astro Info
EV Lacertae is is located only about 16.5 light-years away in the northeast part (22:46:49.7+44:20:2.4, ICRS 2000.0) of Constellation Lacerta, the Lizard -- southeast of Alpha Lacertae; east of the North American Nebula, M39, and Deneb (Alpha Cygni); west of Lambda Andromedae; and northwest of Omicron Andromedae. The star has an optical companion with a separation of five arcseconds. Although EV Lacerate is a well-known flare star that has been extensively observed by telescope, this red dwarf star is usually too faint to be seen with the naked eye. On April 25, 2008, NASA’s spaceborne Swift X-Ray Telescope detected the star flaring so brightly that it became briefly visible in Earth's night sky to unaided Human eyes (NASA news release).

Some astronomers may also refer to this star by its designation as the 873rd star system (Gl 873 or GJ 873) in the famous Gliese Catalogue of Nearby Stars (CNS, now ARICNS database) of Wilhelm Gliese (1915-93), who was a longtime astronomer at the Astronomiches Rechen-Institut at Heidelberg (even when it was at Berlin). The star, however, was probably first observed and designated as BD+43 4305 in a catalogue that was originally published in 1863 by Friedrich Wilhelm August Argelander (1799-1875) on the position and brightness of 324,198 stars between +90° and -2° declination that were measured over 11 years from Bonn, Germany with his assistants Eduard Schönfeld (1828-1891) and Aldalbert Krüger (1832-1896). The catalogue became famous as the Bonner Durchmusterung ("Bonn Survey") and is typically abbreviated as BD. It was later expanded and extended during the early 20th Century with the Cordoba (observed from Argentina) then the Cape Photographic Durchmusterung (observed from South Africa).

EV Lacertae

This cool and dim, main sequence red dwarf (M3.5 Ve) may have about 29 percent of Sol's mass (RECONS estimate), 38 percent of its diameter (Johnson and Wright, 1983, page 703), and less than 17/10,000th of its visual luminosity and 1.2 percent of its bolometric luminosity (NASA Star and Exoplanet Database, derived from the exponential formula of Kenneth R. Lang, 1980). Only be a few hundred million years old, EV Lacertae has been observed to have starspots (or active areas) and may be long persisting at least one polar region (Pettersen et al, 1992; A. David Andrews, 1983; and Bjorn Ragnvald Pettersen, 1980), and at least one "superflare" prior to 2008 was observed (Rojzman and Shevchenko, 1982). The young, eruptive variable star completes a rotation in less than 4.4 days (unlike Sol's 25.4 days or over three and a half weeks) which creates a magnetic field around a hundred times stronger than the Sun's (NASA news release; and Michael E. Contadakis, 1995). Past observations suggest that EV Lacertae could have an unseen companion (more below). A UV-Ceti type flare star, EV Lacertae has been given the variable designation EV Lacertae. Some useful star catalogue numbers and designations are: EV Lac, Gl 873, Hip 112460, BD+43 4305, G 216-16, LHS 3853, LTT 16695, LFT 1737, and Vys/MCC 852.

Habitable Zone

According to one type of model calculations performed for the NASA Star and Exoplanet Database, the inner edge of EV Lac's habitable zone is located relatively far from the star at around 0.112 AU from the star, while the outer edge lies even farther out at around 0.218 AU. The distance from EV Lac where an Earth-type planet would have liquid water on its surface is centered around 0.165 AU -- well within the orbital distance of Mercury's orbital distance in the Solar System. At that distance from the star and with 0.29 Solar-mass, such a planet would have an orbital period exceeding 45 day (or 0.124 Earth years). If there is life on any Earth-type planet orbiting youthful EV Lac, it is likely to be primitive single-cell, anaerobic (non-oxygen producing) bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years and massive stellar flares.

Life Around a Flare Star

Many dim, red (M) dwarf stars exhibit unusually violent flare activity for their size and brightness. These flare stars are actually common because red dwarfs make up more than half of all stars in our galaxy. Although flares do occur on our Sun every so often, the amount of energy released in a solar flare is small compared to the total amount of energy that Sol produces. However, a flare the size of a solar flare occurring on a red dwarf star (UV Ceti) that is more than ten thousand times dimmer than our Sun would emit about as much or more light as the red dwarf does normally.

Flare stars erupt sporadically, with successive flares spaced anywhere from an hour to a few days apart. A flare only takes a few minutes to reach peak brightness, and more than one flare can occur at a time. Moreover, in addition to bursts of light and radio waves, flares on dim red dwarfs may emit up to 10,000 times as many X-rays as a comparably-sized solar flare on our own Sun, and so flares would be lethal to Earth-type life on planets near the flare star. Hence, Earth-type life around flare stars may be unlikely because their planets must be located very close to dim red dwarfs to be warmed sufficiently by star light to have liquid water (about 0.0075 AU for UV Ceti), which makes flares even more dangerous around such stars. In any case, the light emitted by red dwarfs may be too red in color for Earth-type plant life to perform photosynthesis efficiently.