673 Edda

673 Edda
	Modelled shape of Edda from its lightcurve
Discovery
Discovered by	Joel Hastings Metcalf
Discovery site	Taunton, Massachusetts
Discovery date	20 September 1908
Designations
MPC designation	(673) Edda
Pronunciation	/ˈɛdə/[1]
Alternative designations	1908 EA
Orbital characteristics[2]
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	107.57 yr (39290 d)
Aphelion	2.8471 AU (425.92 Gm)
Perihelion	2.7821 AU (416.20 Gm)
Semi-major axis	2.8146 AU (421.06 Gm)
Eccentricity	0.011542
Orbital period (sidereal)	4.72 yr (1,724.7 d) 4.72 yr (1724.7 d)
Mean anomaly	199.04°
Mean motion	0° 12m 31.428s / day
Inclination	2.8770°
Longitude of ascending node	226.723°
Argument of perihelion	236.303°
Physical characteristics
Mean radius	18.765±0.5 km
Synodic rotation period	22.340 h (0.9308 d)
Geometric albedo	0.1044±0.006
Absolute magnitude (H)	10.20

673 Edda is a minor planet orbiting the Sun. It was discovered 20 September 1908 by the American astronomer Joel Hastings Metcalf, and was named for the Norse Edda literary works. The name may also have been inspired by the asteroid's provisional designation 1908 EA.[3] This asteroid is orbiting at a distance of 2.81 AU with a period of 4.72 yr and an eccentricity of 0.012.[2] The orbit is close to a 5:2 mean motion resonance with Jupiter, which is located at 2.824 AU.[4]

The long rotation period and low brightness amplitude of this asteroid make it more challenging for measurement of the rotation period. An extensive photometry campaign in 2015 provided a period of 22.340±0.004 h. The unusual light curve suggests that the asteroid shape is very asymmetric.[5] It is a stony S-type asteroid that spans a mean diameter of 38+6
−2 km.[6]

References

Noah Webster (1884) A Practical Dictionary of the English Language
"673 Edda (1908 EA)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
Schmadel, Lutz D. (2013), Dictionary of Minor Planet Names, Springer Berlin Heidelberg, p. 105, ISBN 9783662028049.
Hahn, G.; et al. (June 1991), "Orbital evolution studies of asteroids near the 5:2 mean motion resonance with Jupiter", Astronomy and Astrophysics, 246 (2): 603–618, Bibcode:1991A&A...246..603H.
Marciniak, Anna; et al. (June 2016), Różańska, Agata; Bejger, M. (eds.), "Difficult cases in photometric studies of asteroids", Proceedings of the Polish Astronomical Society, 3: 84–87, Bibcode:2016pas..conf...84M.
Marciniak, A.; et al. (May 2019), "Thermal properties of slowly rotating asteroids: results from a targeted survey", Astronomy & Astrophysics, 625: 40, arXiv:1905.06056, Bibcode:2019A&A...625A.139M, doi:10.1051/0004-6361/201935129, A139.

External links

673 Edda at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
673 Edda at the JPL Small-Body Database

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[1] Noah Webster (1884) A Practical Dictionary of the English Language

[jpldata-2] "673 Edda (1908 EA)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.

[Schmadel2013-3] Schmadel, Lutz D. (2013), Dictionary of Minor Planet Names, Springer Berlin Heidelberg, p. 105, ISBN 9783662028049.

[Hahn_et_al_1991-4] Hahn, G.; et al. (June 1991), "Orbital evolution studies of asteroids near the 5:2 mean motion resonance with Jupiter", Astronomy and Astrophysics, 246 (2): 603–618, Bibcode:1991A&A...246..603H.

[Marciniak_et_al_2016-5] Marciniak, Anna; et al. (June 2016), Różańska, Agata; Bejger, M. (eds.), "Difficult cases in photometric studies of asteroids", Proceedings of the Polish Astronomical Society, 3: 84–87, Bibcode:2016pas..conf...84M.

[Marciniak_et_al_2019-6] Marciniak, A.; et al. (May 2019), "Thermal properties of slowly rotating asteroids: results from a targeted survey", Astronomy & Astrophysics, 625: 40, arXiv:1905.06056, Bibcode:2019A&A...625A.139M, doi:10.1051/0004-6361/201935129, A139.