1657 Roemera information

1657 Roemera
Discovery
Discovered by	P. Wild
Discovery site	Zimmerwald Obs.
Discovery date	6 March 1961
Designations
MPC designation	(1657) Roemera
Named after	Elizabeth Roemer; (American astronomer)
Alternative designations	1961 EA · 1932 AB
Minor planet category	main-belt · (inner); Phocaea
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	84.79 yr (30,971 days)
Aphelion	2.9032 AU
Perihelion	1.7946 AU
Semi-major axis	2.3489 AU
Eccentricity	0.2360
Orbital period (sidereal)	3.60 yr (1,315 days)
Mean anomaly	253.33°
Inclination	23.372°
Longitude of ascending node	105.32°
Argument of perihelion	54.409°
Physical characteristics
Dimensions	7.665±0.219 km; 8.04 km (calculated)
Synodic rotation period	4.5±1 h; 34.0±0.1 h
Geometric albedo	0.20 (assumed); 0.220±0.030
Spectral type	Tholen = S · S
Absolute magnitude (H)	12.84 · 12.89±0.16

1657 Roemera, provisional designation 1961 EA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 6 March 1961, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and later named after American astronomer Elizabeth Roemer.^[2]^[9]

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[Masiero-2012-5] Cite error: The named reference Masiero-2012 was invoked but never defined (see the help page).

[Wisniewski-1997-6] Cite error: The named reference Wisniewski-1997 was invoked but never defined (see the help page).

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[Pravec-2012b-8] Cite error: The named reference Pravec-2012b was invoked but never defined (see the help page).

[MPC-Roemera-9] Cite error: The named reference MPC-Roemera was invoked but never defined (see the help page).

1657 Roemera information

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1657 Roemera

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