astro.wikisort.org - Asteroid

Search / Calendar

Protogeneia (minor planet designation: 147 Protogenia) is a large main belt asteroid that was discovered by Hungarian astronomer Lipót Schulhof on July 10, 1875, from the Vienna Observatory; it was his only asteroid discovery. Its name is Greek for "first born" and was chosen by Karl L. Littrow in allusion to the fact that this was the first asteroid discovered by an astronomer who was already known for work in other fields of astronomy.[6]

147 Protogeneia
A three-dimensional model of 147 Protogeneia based on its light curve
Discovery
Discovered byLipót Schulhof
Discovery date10 July 1875
Designations
MPC designation
(147) Protogeneia
Pronunciation/ˌprɒtoʊdʒɪˈniːə/[1]
Named after
Protogeneia
Alternative designations
A875 PA
Minor planet category
Main belt
Orbital characteristics[2][3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc132.02 yr (48222 d)
Aphelion3.2230 AU (482.15 Gm)
Perihelion3.04727 AU (455.865 Gm)
Semi-major axis
3.13512 AU (469.007 Gm)
Eccentricity0.028020
Orbital period (sidereal)
5.55 yr (2027.6 d)
Average orbital speed
16.82 km/s
Mean anomaly
92.9051°
Mean motion
0° 10m 39.184s / day
Inclination1.9309°
Longitude of ascending node
248.357°
Argument of perihelion
100.692°
Earth MOID2.03996 AU (305.174 Gm)
Jupiter MOID1.90385 AU (284.812 Gm)
TJupiter3.211
Physical characteristics
Mean radius
66.465±2.55 km[3]
59.22 ± 5.225 km[4]
Mass(1.23 ± 0.05) × 1019 kg[4]
Mean density
14.13 ± 3.78 g/cm3[4]
Equatorial surface gravity
0.0371 m/s²
Equatorial escape velocity
0.0703 km/s
Synodic rotation period
7.8528 h (0.32720 d)[3][5]
Geometric albedo
0.0492±0.004[3]
Temperature~157 K
Spectral type
C
Apparent magnitude
12.4 to 14.5
Absolute magnitude (H)
8.27[5]
8.8[3]

    This object has a low orbital eccentricity and inclination. With an orbital period roughly double that of the planet Jupiter, it has been identified as a member of the Hecuba group of asteroids that share a 2:1 mean-motion orbital resonance with the giant planet.[7] Based upon its spectrum, it has a Tholen classification as a C-type asteroid,[8] which indicates has a dark surface and probably a primitive composition of carbonaceous material.

    Photometric observations of this asteroid at the Altimira Observatory in 2004 gave a light curve with a period of 7.8528 ± 0.0008 hours and a brightness variation of 0.28 in magnitude.[5] A photometric study was reported in 2006 from the Yunnan Observatory in China, finding a matching period of 7.852 hours and a brightness variation of 0.25 magnitude. They estimate the ratio of the lengths for the asteroid's major and minor axes is at least 1.26:1.[9]

    There is one reported stellar occultation by Protogeneia, on May 28, 2002, from Texas.[citation needed]


    References


    1. 'Protogenea' in Noah Webster (1884) A Practical Dictionary of the English Language
    2. "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
    3. Yeomans, Donald K., "147 Protogeneia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 6 May 2016.
    4. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    5. Buchheim, Robert K. (June 2005), "Lightcurve of 147 Protogeneia", The Minor Planet Bulletin, 32 (2): 35–36, Bibcode:2005MPBu...32...35B, ISSN 1052-8091.
    6. Schmadel, Lutz D. (2003), Dictionary of Minor Planet Names (5th ed.), Springer, p. 28, ISBN 3540002383.
    7. Levy, Sophia H. (August 1939), "Mean Elements and Perturbations by the Berkeley Tables of Minor Planets of the Hecuba Group", Publications of the Astronomical Society of the Pacific, 51 (302): 225, Bibcode:1939PASP...51..224L, doi:10.1086/125066.
    8. Bel'Skaya, I. N.; et al. (1991), "Polarimetry of CMEU asteroids. II. A peculiarity of M-type asteroids", Kinematics and Physics of Celestial Bodies, 7 (6): 8–11, Bibcode:1991KPCB....7f...8B.
    9. Zhang, Xi-Liang; et al. (December 2006), "CCD Photometry of Asteroid (147) Protogeneia", Chinese Journal of Astronomy & Astrophysics, 6 (6): 729–732, Bibcode:2006ChJAA...6..729Z, doi:10.1088/1009-9271/6/6/12, S2CID 55204167.



    На других языках

    [de] (147) Protogeneia

    (147) Protogeneia ist ein Asteroid des äußeren Asteroiden-Hauptgürtels, der am 10. Juni 1875 von Lipót Schulhof entdeckt wurde.
    - [en] 147 Protogeneia

    [es] (147) Protogeneia

    (147) Protogeneia es un asteroide perteneciente al cinturón de asteroides descubierto el 10 de julio de 1875 por Léopold Schulhof desde el observatorio de Viena, Austria. Está nombrado por las palabras del griego antiguo que significan «primer naciminento».[2]

    [fr] (147) Protogénie

    (147) Protogénie est un astéroïde de la ceinture principale découvert par Lipót Schulhof le 10 juillet 1875.

    [it] 147 Protogeneia

    147 Protogeneia (in italiano anche 147 Protogenia) è un asteroide della fascia principale del diametro medio di circa 132,9 km. Scoperto nel 1875, presenta un'orbita caratterizzata da un semiasse maggiore pari a 3,1343793 au e da un'eccentricità di 0,0231565, inclinata di 1,93334° rispetto all'eclittica.

    [ru] (147) Протогенея

    (147) Протогенея (др.-греч. Πρωτογένεια) — довольно большой и очень тёмный астероид главного пояса, движущийся вокруг Солнца по почти круговой орбите. Он был открыт 10 июля 1875 года венгерским астрономом Липотом Шульгофом[en] в Венской обсерватории и назван в честь Протогении — одной из дочерей Девкалиона и Пирры согласно древнегреческой мифологии[1]. Это был первый и единственный открытый им астероид. Название Протогенея переводится с греческого как «первенец» и было выбрано астрономом Карлом Литровым в намёке на то, что это был первый астероид, обнаруженный астрономом, уже известным работами в других областях астрономии.


    Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

    Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

    2019-2025
    WikiSort.org - проект по пересортировке и дополнению контента Википедии