170 Maria

170 Maria is a Main belt asteroid that was discovered by French astronomer Henri Joseph Perrotin on January 10, 1877.^[3] Its orbit was computed by Antonio Abetti, and the asteroid was named after his sister, Maria. This is the namesake of the Maria asteroid family; one of the first asteroid families to be identified by Japanese astronomer Kiyotsugu Hirayama in 1918.^[4] This family may be the parent body of the large near-Earth objects 433 Eros and 1036 Ganymed.^[5]

170 Maria

Asteroid Maria passing near a cluster of galaxies as seen by a four inch telescope over a period of nearly two hours.
Discovery
Discovered by	J. Perrotin
Discovery date	10 January 1877
Designations
MPC designation	(170) Maria
Pronunciation	/məˈriːə/ mə-REE-ə
Alternative designations	A877 AA; 1958 AC
Minor planet category	Main belt (Maria)
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	116.69 yr (42622 d)
Aphelion	2.7161 AU (406.32 Gm)
Perihelion	2.3923 AU (357.88 Gm)
Semi-major axis	2.5542 AU (382.10 Gm)
Eccentricity	0.063388
Orbital period (sidereal)	4.08 yr (1491.0 d)
Mean anomaly	88.062°
Mean motion	0° 14m 29.184s / day
Inclination	14.377°
Longitude of ascending node	301.34°
Argument of perihelion	159.21°
Earth MOID	1.4114 AU (211.14 Gm)
Jupiter MOID	2.39948 AU (358.957 Gm)
TJupiter	3.392
Physical characteristics
Dimensions	44.30±1.0 km
Synodic rotation period	13.120 h (0.5467 d)
Geometric albedo	0.1579±0.007
Spectral type	S[2]
Absolute magnitude (H)	9.39

In the Tholen classification system, this is categorized as a stony S-type asteroid based on its spectrum.^[2] Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado during 2007 produced a light curve with a period of 13.120 ± 0.002 hours and a brightness range of 0.21 ± 0.02 in magnitude. Previous measurements from 2000 gave 13.14 and 5.510 hour estimates for the period.^[6]

An occultation of a star by Maria was observed from Manitoba, Canada, on June 10, 1997.

References

1. Yeomans, Donald K., "170 Maria", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, archived from the original on 27 January 2016, retrieved 12 May 2016.
2. DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.
3. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, archived from the original on 13 February 2012, retrieved 7 April 2013.
4. Veeder, G. J.; et al. (March 1995), "Eos, Koronis, and Maria family asteroids: Infrared (JHK) photometry" (PDF), Icarus, 114 (1): 186–196, Bibcode:1995Icar..114..186V, CiteSeerX 10.1.1.31.2739, doi:10.1006/icar.1995.1053.
5. Aljbaae, S.; et al. (November 2017), "The Maria asteroid family", Monthly Notices of the Royal Astronomical Society, 471 (4): 4820–4826, Bibcode:2017MNRAS.471.4820A, doi:10.1093/mnras/stx1921, hdl:11449/179760.
6. Warner, Brian D. (September 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory", The Minor Planet Bulletin, 34 (3): 72, Bibcode:2007MPBu...34...72W.

External links

• Lightcurve plot of 170 Maria, Palmer Divide Observatory, B. D. Warner (2007)
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 170 Maria at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 170 Maria at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters