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Juno (minor-planet designation: 3 Juno) is a large asteroid in the asteroid belt. Juno was the third asteroid discovered, in 1804, by German astronomer Karl Harding. It is tied with three other asteroids as the thirteenth largest asteroid, and it is one of the two largest stony (S-type) asteroids, along with 15 Eunomia. It is estimated to contain 1% of…
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juno asteroid asteroids magnitude discovered belt planet km mass sun orbit symbol discovery surface 15 perihelion yr ceres opposition telescope
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| 3 Juno | Absolute magnitude (H) | 5.33 | 1.00 | infobox |
| 3 Juno | Adjectives | Junonian /dʒuːˈnoʊniən/ | 1.00 | infobox |
| 3 Juno | Angular diameter | 0.30" to 0.07" | 1.00 | infobox |
| 3 Juno | Aphelion | 3.35 AU (501 million km) | 1.00 | infobox |
| 3 Juno | Apparent magnitude | 7.4 to 11.55 | 1.00 | infobox |
| 3 Juno | Argument of perihelion | 247.74° | 1.00 | infobox |
| 3 Juno | Average orbital speed | 17.93 km/s | 1.00 | infobox |
| 3 Juno | Dimensions | (288 × 250 × 225) ± 5 km (320 × 267 × 200) ± 6 km | 1.00 | infobox |
| 3 Juno | Discovered by | Karl Ludwig Harding | 1.00 | infobox |
| 3 Juno | Discovery date | 1 September 1804 | 1.00 | infobox |
| 3 Juno | Earth MOID | 1.04 AU (156 million km) | 1.00 | infobox |
| 3 Juno | Eccentricity | 0.2562 | 1.00 | infobox |
| 3 Juno | Equatorial escape velocity | 0.168 km/s | 1.00 | infobox |
| 3 Juno | Equatorial rotation velocity | 31.75 m/s[c] | 1.00 | infobox |
| 3 Juno | Equatorial surface gravity | 0.112 m/s2 (0.0114 g0) | 1.00 | infobox |
| 3 Juno | Geometric albedo | 0.202 0.238 | 1.00 | infobox |
| 3 Juno | Inclination | 12.991° | 1.00 | infobox |
| 3 Juno | Longitude of ascending node | 169.84° | 1.00 | infobox |
| 3 Juno | Mass | (2.7±0.24)×1019 kg[a] (2.86±0.46)×1019 kg[b] | 1.00 | infobox |
| 3 Juno | Mean anomaly | 37.02° | 1.00 | infobox |
| 3 Juno | Mean density | 3.15±0.28 g/cm3 3.20±0.56 g/cm3 | 1.00 | infobox |
| 3 Juno | Mean diameter | 254±2 km 246.596±10.594 km | 1.00 | infobox |
| 3 Juno | Minor planet category | Main belt (Juno clump) | 1.00 | infobox |
| 3 Juno | Named after | Juno (Latin: Iūno) | 1.00 | infobox |
| 3 Juno | Orbital period (sidereal) | 4.361 yr | 1.00 | infobox |
| 3 Juno | Perihelion | 1.985 AU (297.0 million km) | 1.00 | infobox |
| 3 Juno | Pole ecliptic latitude | 27° ± 5° | 1.00 | infobox |
| 3 Juno | Pole ecliptic longitude | 103° ± 5° | 1.00 | infobox |
| 3 Juno | Precession of asc. node | −61.222138 arcsec / yr | 1.00 | infobox |
| 3 Juno | Precession of perihelion long. | 43.635655 arcsec / yr | 1.00 | infobox |
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