Discovery [1] | |
---|---|
Discovered by | P. Wild |
Discovery site | Zimmerwald Obs. |
Discovery date | 6 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 arc | 84.79 yr (30,971 days) |
Aphelion | 2.9032 AU |
Perihelion | 1.7946 AU |
2.3489 AU | |
Eccentricity | 0.2360 |
3.60 yr (1,315 days) | |
253.33° | |
Inclination | 23.372° |
105.32° | |
54.409° | |
Physical characteristics | |
Dimensions | 7.665±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]
Roemera is a member of the Phocaea family ( 701 ), [3] [4] a large family of stony asteroids with nearly two thousand known members. [10] : 23 It orbits the Sun in the inner main-belt at a distance of 1.8–2.9 AU once every 3 years and 7 months (1,315 days). Its orbit has an eccentricity of 0.24 and an inclination of 23° with respect to the ecliptic. [1] Roemera was first identified as 1932 AB at Heidelberg Observatory in 1932, extending the body's observation arc by 29 years prior to its official discovery observation at Zimmerwald. [9]
In the Tholen classification, Roemera is a stony S-type asteroid. [1]
In May 2008, American astronomer Brian Warner obtained a rotational lightcurve of Roemera from photometric observations at his Palmer Divide Observatory in Colorado. It gave a longer than average rotation period of 34.0 hours with a brightness variation of 0.15 magnitude ( U=2 ). [7] Polish astronomer Wiesław Z. Wiśniewski found a different period solution of 4.5 hours with a low amplitude of 0.09 magnitude in March 1990 ( U=2 ). [6]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Roemera measures 7.66 kilometers in diameter and its surface has an albedo of 0.220, [5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.04 kilometers with an absolute magnitude of 12.89. [3]
This minor planet was named by the discoverer in honor American astronomer Elizabeth Roemer (1929–2016), U.S. Naval Observatory, in appreciation of her untiring and successful efforts to advance the knowledge of the motions and physical properties of comets and minor planets. [2] Roemer herself discovered the asteroids 1930 Lucifer and 1983 Bok. The official naming citation was published by the Minor Planet Center on 1 February 1965 ( M.P.C. 2347). [11]
827 Wolfiana, provisional designation 1916 ZW, is a Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered at Vienna Observatory on 29 August 1916, by Austrian astronomer Johann Palisa, who named it after German astronomer Max Wolf. The assumed stony asteroid has a rotation period of 4.0654 hours.
1575 Winifred, provisional designation 1950 HH, is a stony Phocaea asteroid and slow rotator from the inner regions of the asteroid belt, approximately 9.5 kilometers in diameter.
1047 Geisha, provisional designation 1924 TE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 17 November 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the British musical The Geisha.
1164 Kobolda, provisional designation 1930 FB, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1930, the asteroid was later named after German astronomer Hermann Kobold.
9963 Sandage, provisional designation 1992 AN, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.
6398 Timhunter, provisional designation 1991 CD1, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered on 10 February 1991, by American astronomer couple Carolyn and Eugene Shoemaker, in collaboration with Canadian astronomer David H. Levy at Palomar Observatory in California, United States. It was named for American amateur astronomer Tim Hunter.
1184 Gaea, provisional designation 1926 RE, is an Aerian asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 5 September 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the goddess of Earth, Gaea (Gaia), from Greek mythology.
2937 Gibbs, provisional designation 1980 LA, is a stony Phocaea asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 14 June 1980, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona. The asteroid was named after American scientist Josiah Willard Gibbs.
1370 Hella, provisional designation 1935 QG, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5.4 kilometers in diameter. It was discovered on 31 August 1935, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named for Helene Nowacki, an astronomer at the Astronomical Calculation Institute.
3322 Lidiya, provisional designation 1975 XY1, is a stony Phocaea asteroid and potentially slow rotator from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 1 December 1975, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The asteroid was named after Russian aviator Lidiya Zvereva.
1831 Nicholson, provisional designation 1968 HC, is a stony asteroid of the Baptistina family from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 17 April 1968, by Swiss astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland. The S-type asteroid has a rotation period of 3.2 hours. It was named for American astronomer Seth B. Nicholson.
1830 Pogson, provisional designation 1968 HA, is a stony Florian asteroid and an asynchronous binary system from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 17 April 1968, by Swiss astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland. The S-type asteroid has a rotation period 2.6 of hours. It was named for English astronomer Norman Pogson. The discovery of its 2.5-kilometer sized companion was announced in May 2007.
23712 Willpatrick, provisional designation 1998 AA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter.
1947 Iso-Heikkilä, provisional designation 1935 EA, is a carbonaceous Eos asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 4 March 1935, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It was named after the location of the discovering observatory, which is also known as the "Iso-Heikkilä Observatory".
4388 Jürgenstock, provisional designation 1964 VE, is a bright Phocaea asteroid from the inner regions of the asteroid belt, approximately 4.7 kilometers in diameter. It was discovered on 3 November 1964, by astronomers at Indiana University during the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. The assumed S-type asteroid has a short rotation period of 2.8 hours and is rather spherical in shape. It was named for German-Venezuelan astronomer Jürgen Stock. In February 2019, the asteroid occulted the brightest star in the night sky, Sirius.
1565 Lemaître, provisional designation 1948 WA, is a highly eccentric Phocaea asteroid and sizable Mars-crosser from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 25 November 1948, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, Belgium. It was named after cosmologist and priest Georges Lemaître.
2429 Schürer, provisional designation 1977 TZ, is a Maria asteroid from the central region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 12 October 1977, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and later named after Swiss astronomer Max Schürer. The likely elongated S-type asteroid has a rotation period of 6.6 hours.
13025 Zürich, provisional designation 1989 BA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 28 January 1989, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and later named for the Swiss city of Zürich.
10988 Feinstein, provisional designation 1968 OL, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 3.4 kilometers in diameter. It was discovered on 28 July 1968, by astronomers at the Félix Aguilar Observatory in El Leoncito, Argentina. The asteroid was named after Argentine astronomer Alejandro Feinstein in 2008.
24827 Maryphil, provisional designation 1995 RA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 2 September 1995, by American astronomer Timothy Spahr at the Catalina Station near Tucson, Arizona, who named it for his parents, Mary & Phil Spahr.