100000 Astronautica

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100000 Astronautica
Discovery [1]
Discovered by J. B. Gibson
Discovery site Palomar Obs.
Discovery date 28 September 1982
MPC designation (100000) Astronautica
Named after
50th anniv. Space Age
(Latin: star sailor)[2][3]
1982 SH1 · 2002 CW115
main-belt · (inner)[1]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 34.10 yr (12,456 days)
Aphelion 2.0712 AU
Perihelion 1.7382 AU
1.9047 AU
Eccentricity 0.0874
2.63 yr (960 days)
0° 22m 29.64s / day
Inclination 21.191°
Physical characteristics

100000 Astronautica, provisionally designated 1982 SH1, is a Hungaria asteroid from the innermost region of the asteroid belt. It was discovered on 28 September 1982, by American astronomer James Gibson at Palomar Observatory, California, United States. It was named Astronautica (Latin for "star sailor") on the 50th anniversary of the Space Age.[2]

Orbit and characterization[edit]

Astronautica is a member of the Hungaria family, a group, which forms the innermost dense concentration of asteroids in the Solar System. It orbits the Sun in the inner main-belt at a distance of 1.7–2.1 AU once every 2 years and 8 months (960 days). Its orbit has an eccentricity of 0.09 and an inclination of 21° with respect to the ecliptic.[1] As no precoveries were taken, Astronautica's observation arc begins with its discovery observation in 1982.[2] It has an absolute magnitude of 16.9.[1] As of 2017, the asteroid's spectral type, rotation period and shape remain unknown.[1][4]


This minor planet marked the milestone of the 100,000th numbered minor planet in October 2005.[5] It was named in October 2007, by the International Astronomical Union's Committee on Small Body Nomenclature to recognize the 50th anniversary of the start of the Space Age, as marked by the launch of the Soviet Sputnik spacecraft into orbit on 4 October 1957 (M.P.C. 60731).[6] The number 100,000 is significant because it marks the altitude in meters where outer space begins, as delineated by the Kármán line established by the Fédération Aéronautique Internationale. The name 'Astronautica' is Latin for 'star sailor'.[3][5]


  1. ^ a b c d e f g "JPL Small-Body Database Browser: 100000 Astronautica (1982 SH1)" (2016-10-27 last obs.). Jet Propulsion Laboratory. Retrieved 28 June 2017. 
  2. ^ a b c d "100000 Astronautica (1982 SH1)". Minor Planet Center. Retrieved 20 September 2016. 
  3. ^ a b Aguilar, David A.; Pulliam, Christine (9 October 2007). "Asteroid Named in Honor of 50th Anniversary of the Space Age". Harvard Smithsonian Center for Astrophysics. Archived from the original on 8 April 2010. Retrieved 18 September 2016. 
  4. ^ "LCDB Data for (100000) Astronautica". Asteroid Lightcurve Database (LCDB). Retrieved 28 June 2017. 
  5. ^ a b Tichá, Jana; Marsden, Brian G.; Bowell, Edward L. G.; Williams, Iwan P.; Marsden, Brian G.; Green, Daniel W. E.; et al. (December 2008). "Division III / Working Group Committee on Small Bodies Nomenclature". Transactions IAU. 4 (27A): 187–189. Bibcode:2009IAUTA..27..187T. doi:10.1017/S1743921308025489. Retrieved 20 September 2016. 
  6. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 September 2016. 

External links[edit]