_Malzovia.png) Modelled shape ofMalzovia from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | S. Belyavskyj |
| Discovery site | Simeiz Obs. |
| Discovery date | 5 April 1913 |
| Designations | |
| (749) Malzovia | |
Named after | Nikolai Maltsov[2] (Russian amateur astronomer) |
| A913 GD · 1950 JO 1968 XA · 1913 RF | |
| Orbital characteristics[3] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 107.00yr (39,080 d) |
| Aphelion | 2.6316AU |
| Perihelion | 1.8558 AU |
| 2.2437 AU | |
| Eccentricity | 0.1729 |
| 3.36 yr (1,228 d) | |
| 289.14° | |
| 0° 17m 35.88s / day | |
| Inclination | 5.3946° |
| 109.76° | |
| 128.97° | |
| Physical characteristics | |
| 5.9274±0.0002 h[10][a] | |
749 Malzovia (prov. designation:A913 GDor1913 RF) is a stonybackground asteroid from the inner regions of theasteroid belt, approximately 11 kilometers (6.8 miles) in diameter. It was discovered on 5 April 1913, by Russian astronomerSergey Belyavsky at theSimeiz Observatory on the Crimean peninsula.[1] The elongatedS-type asteroid has arotation period of 5.9 hours. It was named after Russian amateur astronomerNikolai Maltsov (S. I. Maltsov) who founded the discovering Simeïs Observatory in 1900.[2]
Located in the region of theFlora family (402),[12] a giantasteroid family and the largest family of stony asteroids,Malzovia is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[4][5][6] It orbits the Sun in theinner main-belt at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,228 days;semi-major axis of 2.24 AU). Its orbit has aneccentricity of 0.17 and aninclination of 5° with respect to theecliptic.[3] The body'sobservation arc begins at the GermanHeidelberg Observatory on 30 April 1913, or 25 days after its official discovery observation atSimeiz Observatory.[1]
Thisminor planet was named after Russian amateur astronomerNikolai Sergeevich Maltsov (S. I. Malzov) who founded the discovering Simeiz Observatory, which he later donated to thePulkovo Observatory in 1911. Malzov was a close friend ofSergey Belyavsky and ofOskar Backlund, after whom asteroid856 Backlunda was named. After World War I, Malzov lived atMenton, on the French Riviera near Italy. Thenaming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 75).[2]
In theTholen and Bus–BinzelSMASS classification,Malzovia is a common, stonyS-type asteroid.[3]
In February 2020, a rotationallightcurve ofMalzovia was obtained fromphotometric observations by French amateur astronomerRené Roy. Lightcurve analysis gave a well-definedrotation period of (5.9274±0.0002) hours with a high brightness variation of0.50±0.02magnitude, indicative of its elongated shape (U=3).[10] Alternative period determinations byJulian Oey andFrederick Pilcher in May 2014 gave very similar results of (5.9275±0.0002) and (5.9279±0.0001) hours, respectively, both with an amplitude of 0.30 magnitude (U=3−/3−).[13][14][a]
Published in 2018, thermophysical modeling ofMalzovia from thermal data obtained from theWide-field Infrared Survey Explorer (WISE) gave a sidereal period of (5.92748±0.00002 h) and twospin axes at (53.0°, 37.0°) and (242.0°, 46.0°) inecliptic coordinates (λ, β).[11] Previously, two lightcurves published in 2016, using modeled photometric data from the Lowell Photometric Database (LPD) and other sources, gave a period of (5.92749±0.00001) and5.92748±0.00005 hours, respectively. Each modeled lightcurve also determined two poles at (53.0°, 37.0°) and (242.0°, 46.0°), as well as (55.0°, 46.0°) and (246.0°, 55.0°), respectively.[15][16]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA's WISE telescope,Malzovia measures (11.065±0.071) and (12.13±0.26 km) kilometers in diameter and its surface has a lowalbedo of (0.270±0.029) and (0.239±0.011), respectively.[7][8][9]
TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 and calculates a diameter of 12.98 kilometers based on anabsolute magnitude of 11.6.[12] The WISE team also published several alternative mean-diameters of (11.11±2.12 km), (11.658±2.526 km) and (11.724±0.056 km), with a corresponding albedo of (0.41±0.12), (0.351±0.144) and (0.2444±0.0464).[5][12]
