55 ปู อี
Sign in to saveAlso known as 55 Cnc e, Janssen, * rho01 Cnc e, TOI-1773.01, TIC 332064670e, TOI-1773e
extrasolar planet
Key facts
- Discovered by
- McArthur et al.
- Discovery site
- McDonald Observatory
- Discovery date
- 2004 (announced), 2003–2004 (discovery data)
- Detection method
- Radial velocity
- Apastron
- 0.01617 AU (2,419,000 km)
- Periastron
- 0.01464 AU (2,190,000 km)
- Semi major axis
- 0.01544 ± 0.00005 AU (2,309,800 ± 7,500 km)
- Eccentricity
- 0.05 ± 0.03
- Orbital period sidereal
- 0.736 546 25 (15) d , 17.67711 h
- Inclination
- 83.59 , − 0.44
- Time of periastron
- 2,449,999.83643 ± 0.0001
- Argument of periastron
- 86.0 , − 33.4
- Semi amplitude
- 6.02 , − 0.23
- Star
- 55 Cancri A
- Mean radius
- 1.875 ± 0.029 R 🜨
- Mass
- 7.99 , − 0.33 M 🜨
- Mean density
- 6.66 , − 0.40 g cm
- Surface gravity
- 2.273 g
via Wikipedia infobox
Wikidata facts
- Instance of
- star
- Named after
- Zaccarias Janssen
- Constellation
- Cancer
- Distance from Earth
- 40
- Radius
- 1.856
- Mass
- 0.02703
- Orbital period
- 0.736543
- Image
- Newneptune nasa big.jpg
Show 18 more facts
- Commons category
- 55 Cancri e
- orbital eccentricity
- 0
- time of discovery or invention
- 2004-10-00
- discovery method
- Doppler spectroscopy
- temperature
- 2500
- right ascension
- 133.14921386755503
- declination
- 28.33082136149056
- epoch
- J2000.0
- catalog code
- TIC 332064670e
- name
- Janssen
- semi-major axis of an orbit
- 0.015439
- argument of periapsis
- 170
- orbital inclination
- 83.9
- right ascension component of proper motion
- -485.872
- declination component of proper motion
- -233.651
- parallax
- 79.4274
- M sin i
- 0.0235
- time of periapsis
- 2449999.83643
via Wikidata · CC0