1657 Roemera

1657 Roemera
Discovery[1]
Discovered byP. Wild
Discovery siteZimmerwald Obs.
Discovery date6 March 1961
Designations
(1657) Roemera
Named after
Elizabeth Roemer
(American astronomer)[2]
1961 EA · 1932 AB
main-belt · (inner)[3]
Phocaea[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc84.79 yr (30,971 days)
Aphelion2.9032 AU
Perihelion1.7946 AU
2.3489 AU
Eccentricity0.2360
3.60 yr (1,315 days)
253.33°
Inclination23.372°
105.32°
54.409°
Physical characteristics
Dimensions7.665±0.219 km[5]
8.04 km (calculated)[3]
4.5±1 h[6]
34.0±0.1 h[7]
0.20 (assumed)[3]
0.220±0.030[5]
Tholen = S[1] · S[3]
12.84[1][5] · 12.89±0.16[3][6][8]

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]

  1. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference springer was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference lcdb was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Ferret was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Masiero-2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Wisniewski-1997 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Warner-2009b was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Pravec-2012b was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference MPC-Roemera was invoked but never defined (see the help page).