 Orbital diagram | |
| Discovery [1] | |
|---|---|
| Discovered by | M. F. Wolf |
| Discovery site | Heidelberg Obs. |
| Discovery date | 2 February 1910 |
| Designations | |
| (330) Adalberta | |
| Pronunciation | /ædəlˈbɜːrtə/ |
Named after | Adalbert Merx (discoverer's family) Adalbert Krüger(astronomer) [2] |
| A910 CB · 1937 AD 1951 SW · 1974 OQ 1978 PS1 · 1978 QJ3 1980 EE | |
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 106.36 yr (38,848 days) |
| Aphelion | 3.0929AU |
| Perihelion | 1.8426 AU |
| 2.4677 AU | |
| Eccentricity | 0.2533 |
| 3.88yr (1,416 days) | |
| 283.89° | |
| 0° 15m 15.12s / day | |
| Inclination | 6.7569° |
| 137.14° | |
| 259.26° | |
| Physical characteristics | |
| 9.111±0.303 km[4] | |
| 3.5553±0.0001 h[5] | |
| 0.20(assumed)[3] 0.256±0.045[4] | |
| S [3] | |
| 12.30[4] · 12.4[1][3] · 12.46±0.26[6] | |
330 Adalberta (prov. designation:A910 CB) is a stonyasteroid from the inner regions of theasteroid belt, approximately 9.5 kilometers in diameter. It is likely named for either Adalbert Merx orAdalbert Krüger. It was discovered byMax Wolf in 1910. In the 1980s, the asteroid's permanentdesignation was reassigned from the non-existent object1892 X.[a][2][7]
Adalberta was discovered on 2 February 1910, by German astronomerMax Wolf atHeidelberg Observatory in southern Germany.[7]
Previously, on 18 March 1892, another body discovered by Max Wolf with theprovisional designation1892 X was originally designated330 Adalberta, but was subsequently lost and never recovered(also seeLost minor planet). In 1982, it was determined that Wolf erroneously measured two images of stars, not asteroids. As it was a false positive and the body never existed,[a] the nameAdalberta and number "330" was then reused for this asteroid,A910 CB, which itself was observed again briefly in 1937, 1951, 1974, 1978 (twice) and 1980, receiving a new designation on each occasion,[1] before it was recognised that all of these observations were of the same object.MPC citation was published on 6 June 1982 (M.P.C. 6939).[2][8]
TheS-type asteroid orbits the Sun in theinner main-belt at a distance of 1.8–3.1 AU once every 3 years and 11 months (1,416 days). Its orbit has aneccentricity of 0.25 and aninclination of 7° with respect to theecliptic.[1]Adalberta'sobservation arc begins with its official discovery observation at Heidelberg in 1910.[7]
This minor planet was named in honor of the discoverer's father-in-law, Adalbert Merx (after whom another minor planet808 Merxia is also named). However it is also possible that it was named forAdalbert Krüger (1832–1896), a German astronomer and editor of theAstronomische Nachrichten, which was one of the first international journals in the field of astronomy.[2] The naming citation was first mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 37).[2]
In 2013, a rotationallightcurve ofAdalberta was obtained fromphotometric observations at Los Algarrobos Observatory (I38) in Uruguay. Light-curve analysis gave a well-definedrotation period of3.5553±0.0001 hours with a brightness variation of 0.44magnitude (U=3).[5]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Adalberta measures 9.11 kilometers in diameter, and its surface has analbedo of 0.256,[4] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.84 kilometers using an absolute magnitude of 12.4.[3]
