astro.wikisort.org - Asteroid

848 Inna (prov. designation: A915 RQ or 1915 XS) is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt. It was discovered on 5 September 1915, by astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[1] The C-type asteroid measures approximately 33 kilometers (21 miles) in diameter, while its rotation period remains unknown. It was named after Russian astronomer Inna Nikolaevna Leman-Balanovskaya (1881–1945).[2]

848 Inna

Discovery [1]
Discovered by	G. Neujmin
Discovery site	Simeiz Obs.
Discovery date	5 September 1915
Designations
MPC designation	(848) Inna
Named after	Inna Nikolaevna Leman-Balanovskaya (Russian astronomer)[2]
Alternative designations	A915 RQ · 1932 WJ 1934 AC · 1934 CM1 1934 CV · 1937 RD 1959 TJ · A905 YA 1915 XS · 1905 YA
Minor planet category	main-belt [1][3] · (outer) Themis [4][5][6]
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc	114.10 yr (41,676 d)
Aphelion	3.6160 AU
Perihelion	2.6039 AU
Semi-major axis	3.1100 AU
Eccentricity	0.1627
Orbital period (sidereal)	5.48 yr (2,003 d)
Mean anomaly	56.581°
Mean motion	0° 10m 46.92s / day
Inclination	1.0538°
Longitude of ascending node	207.82°
Argument of perihelion	125.37°
Physical characteristics
Mean diameter	33.027±0.130 km[7]
Synodic rotation period	unknown[8]
Geometric albedo	0.069±0.012[7]
Spectral type	C (S3OS2-TH)[9] Cb (S3OS2-BB)[9]
Absolute magnitude (H)	11.3[1][3]

Orbit and classification

When applying the hierarchical clustering method to its proper orbital elements, Inna is a core member of the Themis family (602), a very large family of carbonaceous asteroids, named after 24 Themis.[4][5][6][10]^: 23 It orbits the Sun in the outer main-belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (2,003 days; semi-major axis of 3.11 AU). Its orbit has an eccentricity of 0.16 and an inclination of 1° with respect to the ecliptic.[3]

Discovery

Inna was officially discovered on 5 September 1915, by Georgian–Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[1] Four nights later, it was independently discovered by Max Wolf at Heidelberg Observatory on 9 September 1915,[2] which is also the beginning of the body's observation arc. The Minor Planet Center, however, only credits the first astronomer with the discovery. The asteroid was first observed by Wolf as A905 YA at Heidelberg on 27 December 1905.[1]

Naming

This minor planet was named after Inna Nikolaevna Leman-Balanovskaya (1881–1945), a Russian astronomer at the Pulkovo Observatory near St Petersburg, Russia. The naming was not mentioned in The Names of the Minor Planets by Paul Herget in 1955. Lutz Schmadel, the author of the Dictionary of Minor Planet Names learned about the origin of the minor planet's name from private communications with astronomer Nikolai Chernykh (1931–2004), who worked as an astrometricist and Solar System dynamicist at the Crimean Astrophysical Observatory.[2]

Physical characteristics

In the Tholen-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Inna is a common carbonaceous C-type asteroid, while in the survey's SMASS-like taxonomic variant, it is a Cb-subtype, transitioning to the somewhat brighter B-type asteroids.[9][11] The Themis family has a "CB" overall spectral type.[10]^: 23 As of 2020^[update], no rotational lightcurve of Inna has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[3][11]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Inna measures 33.027±0.130 kilometers in diameter and its surface has an albedo of 0.069±0.012.[7] Alternative mean-diameters published by the WISE team include (34.288±10.621 km) and (36.842±1.035 km) with corresponding albedos of (0.042±0.025) and (0.043±0.014).[11]

References

External links

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 848 Inna at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 848 Inna at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (848) Inna

(848) Inna ist ein Asteroid des Hauptgürtels, der am 5. September 1915 vom russischen Astronomen Grigori Nikolajewitsch Neuimin in Simejis entdeckt wurde.

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- [en] 848 Inna

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[ru] (848) Инна

(848) Инна (лат. Inna) — астероид главного пояса, принадлежащий к семейству Фемид. Был обнаружен 5 сентября 1915 года русским астрономом Григорием Неуйминым в Симеизской обсерватории и назван в честь русского астронома Пулковской обсерватории Инны Николаевны Леман-Балановской[1]. Независимо был открыт 9 сентября 1915 года немецким астрономом Максом Вольфом в обсерватории Хайдельберг.

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