| Discovery[1] | |
|---|---|
| Discovered by | J. Palisa |
| Discovery site | Vienna Obs. |
| Discovery date | 3 October 1910 |
| Designations | |
| (703) Noëmi | |
Named after | Valentine Noémi von Springer (née von Rothschild; daughter ofBaronRothschild)[2] |
| 1910 KT | |
| main-belt · Flora[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 106.48 yr (38,891 days) |
| Aphelion | 2.4744AU |
| Perihelion | 1.8748 AU |
| 2.1746 AU | |
| Eccentricity | 0.1379 |
| 3.21yr (1,171 days) | |
| 107.58° | |
| 0° 18m 26.28s / day | |
| Inclination | 2.4579° |
| 213.77° | |
| 174.50° | |
| Physical characteristics | |
| Dimensions | 7.250±0.273 km[5][6] 8.58 km(calculated)[3] 9.85±1.42 km[7] |
| 201.8±2.0h[a] | |
| 0.19±0.10[7] 0.24(assumed)[3] 0.368±0.046[6] 0.486±0.071[5] | |
| S[3] | |
| 12.10[5] · 12.33±0.24[8] · 12.40[6] · 12.5[1][3] · 12.70[7] | |
703 Noëmi, provisional designation1910 KT, is a stony Florianasteroid and possibleslow rotator from the inner regions of theasteroid belt, approximately 8.5 kilometers in diameter. It was discovered by Austrian astronomerJohann Palisa at theVienna Observatory on 3 October 1910.[9] The asteroid was likely named for Baroness Valentine Noémi von Springer (née von Rothschild; 1886–1968).
Noëmi is a member of theFlora family, the3rd largest main-beltasteroid family with nearly 14,000 known members.[4]: 23
This asteroid orbits the Sun in theinner main-belt at a distance of 1.9–2.5 AU once every 3 years and 3 months (1,171 days). Its orbit has aneccentricity of 0.14 and aninclination of 2° with respect to theecliptic.[1] The body'sobservation arc begins at Vienna, 3 days after its official discovery observation.[9]
Noëmi has been characterized as a common stonyS-type asteroid based on its classification to the Flora family.[3]
In December 2016, a rotationallightcurve ofNoëmi was obtained from photometric observations. Lightcurve analysis gave arotation period of201.8±2.0 hours with a brightness variation of 0.8magnitude (U=n.a.),[a] superseding a previous inconclusive observation by French amateur astronomerPierre Antonini from February 2011.[10]
The lightcurve's large amplitude of 0.8 magnitude is typically indicative of a non-spheroidal shape (an elongated, irregular shape). As of July 2017, the asteroid is only apossible slow rotator as thelightcurve's quality has not been rated.[3]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Noëmi measures between 7.250 and 9.85 kilometers in diameter and its surface has analbedo between 0.19 and 0.486.[5][6][7]
TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from8 Flora, the largest member and namesake of its family – and calculates a diameter of 8.58 kilometers based on anabsolute magnitude of 12.5.[3]
According to A. Schnell, thisminor planet was probably named for Baroness Valentine Noémi von Rothschild (1886–1969) to celebrate her engagement to Baron Sigismund von Springer (1873–1927).[11] Baroness von Springer was the only daughter ofBaronAlbert von Rothschild,[12][2] a banker,steam-railway pioneer, philanthropist, and astronomy enthusiast who had recently donated a stereocomparator to the Vienna Observatory and who, in 1885, had given the observatory 10,000florins for purchase of itscoudé-focusequatorial telescope.[13] The baroness's property was "Aryanized" during the 1938Anschluss.[14] Baroness von Springer's niece, Baroness Bettina – named after Baroness Valentine Noémi de Rothschild's mother, Bettina – was mentioned in 1998 news stories, when Austria passed a law returning to Rothschild heirs such treasures as remained in Austrian museums.[15][16][17]
The naming ofNoemi was published inSirius journal in 1911 and inAstronomische Nachrichten in 1912 (AN 190).[2][18]
