Varungrah (pratiik: 
, Neptune) Saur Mandal me Suraj se duur aathwa grah hae. Ii ek gas giant hae. Agar diameter dekha jaae, tab ii Saur Mandal ke 4th sab se barraa grah hae, mass dekha jaae tab ii 3rd sab se garrhu hae air sab se dense giant grah hae. Ii dunia ke mass ke 17 gunaa hae. Agar Varungrah ke iske parrosi grah, Uranus, se compare karaa jaae tab, Varungrah thorraa chhotaa, lekin aur garrhu aur dense hae. II lagbhag puura gases aur liquids se banaa hae,[15] iske koi achchhaa se defined solid surface nai hae. Varungrah, Suraj ke har 164.8 saal parikrama kare hae aur iske orbital distance 30.1 astronomical units (4.5 billion kilometres; 2.8 billion miles) hae. Iske naam Rome ke samundar ke deota se aais hae aur iske astronomical symbol , hae jon trishul ke represent kare hae.
Quick Facts Discovery, Discovered by ...
Varungrah Neptune, aslii rang me; [1] biich me Great Dark Spot hae. |
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| Discovered by |
- Johann Galle
- Urbain Le Verrier
- John Couch Adams
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| Discovery date | 23 September 1846 |
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|
| Pronunciation | [3] |
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Named after | Latin Neptunus, via French
Neptune |
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| Adjectives | Neptunian (),
Poseidean[4] |
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| Symbol | , |
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| Epoch J2000 |
| Aphelion | 30.33 AU (4.54 billion km) |
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| Perihelion | 29.81 AU (4.46 billion km) |
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Semi-major axis | 30.07 AU (4.50 billion km) |
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| Eccentricity | 0.008678 |
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Orbital period (sidereal) |
- 164.8 yr
- 60,195 days
- 89,666 Neptunian solar days[6]
|
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Orbital period (synodic) | 367.49 days[7] |
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Average orbital speed | 5.43 km/s[7] |
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Mean anomaly | 259.883° |
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| Inclination | 1.770° to ecliptic
6.43° to Sun's equator
0.74° to invariable plane[8] |
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Longitude of ascending node | 131.783° |
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Time of perihelion | 2042-Sep-04[9] |
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Argument of perihelion | 273.187° |
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| Known satellites | 16 |
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|
Mean radius | 24,622±19 km |
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Equatorial radius | 24,764±15 kmRefers to the
level of 1 bar (100 kPa) atmospheric
pressure 3.883 Earths |
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Polar radius | 24,341±30 km
3.829 Earths |
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| Flattening | 0.0171±0.0013 |
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Surface area | 7.6183×109 km2
14.94 Earths |
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| Volume | 6.253×1013 km3[7]
57.74 Earths |
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| Mass | 1.02409×1026 kg[7]
17.147 Earths
5.15×10−5 Suns |
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Mean density | 1.638 g/cm3[7] |
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Surface gravity | 11.15 m/s2 (1.137 g0) |
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Moment of inertia factor | 0.23[10] (estimate) |
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Escape velocity | 23.5 km/s[7] |
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Synodic rotation period | 0.67125 d
16 h 6 m 36 s[6] |
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Sidereal rotation period | 0.6713 day[7]
16 h 6 min 36 s |
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Equatorial rotation velocity | 2.68 km/s[11] |
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Axial tilt | 28.32° (to orbit)[7] |
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North pole right ascension | 19h 57m 20s
299.36°[12] |
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North pole declination | 43.46°[12] |
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| Albedo | 0.290 (bond)
0.442 (geom.) |
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| Surface temp. |
min |
mean |
max |
| 1 bar level |
|
72 K (−201 °C)[7] |
|
| 0.1 bar (10 kPa) |
|
55 K (−218 °C)[7] |
|
|
Apparent magnitude | 7.67 to 8.00 |
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Absolute magnitude (H) | −6.9[13] |
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Angular diameter | 2.2–2.4″[7][14] |
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|
Scale height | 19.7±0.6 km |
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| Composition by volume |
- 80%±3.2% hydrogen
- 19%±3.2% helium
- 1.5%±0.5% methane
- ~0.019% hydrogen deuteride
- ~0.00015% ethane
- Icy volatiles:
- ammonia
- water ice
- ammonium hydrosulfide
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Close
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, Neptune) Saur Mandal me Suraj se duur aathwa grah hae. Ii ek gas giant hae. Agar diameter dekha jaae, tab ii Saur Mandal ke 4th sab se barraa grah hae, mass dekha jaae tab ii 3rd sab se garrhu hae air sab se dense giant grah hae. Ii dunia ke mass ke 17 gunaa hae. Agar Varungrah ke iske parrosi grah, Uranus, se compare karaa jaae tab, Varungrah thorraa chhotaa, lekin aur garrhu aur dense hae. II lagbhag puura gases aur liquids se banaa hae,[15] iske koi achchhaa se defined solid surface nai hae. Varungrah, Suraj ke har 164.8 saal parikrama kare hae aur iske orbital distance 30.1 astronomical units (4.5 billion kilometres; 2.8 billion miles) hae. Iske naam Rome ke samundar ke deota se aais hae aur iske astronomical symbol 
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