Key parameters at a glance
- A radius of 14.00 Earth radii
- A mass of 218.53 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 4.617 days
- Semi-major axis 0.0592 AU
- Distance from Earth 43.72 light-years
- Earth Similarity Index 0.279
- Travel time at Voyager 1 speed 771,047 years
2 siblings around ups And
ups And b shares its host star with 2 other confirmed planets. Side-by-side measurements below.
ups And b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#415of 1771
top 23.4%
This planet
14.00R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | ups And b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.00 | 11.21 |
| Mass (M⊕) | 1.00 | 218.53 | 317.83 |
| Density (g/cm³) | 5.51 | 0.44 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 218.531 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 9826
HIP
HIP 7513
TIC
TIC 189576919
Gaia DR2
Gaia DR2 348020448377061376
Gaia DR3
Gaia DR3 348020482735930112
System
ups And
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.62 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0592 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
70.510 m/s
Transit mid-time (BJD)
2,453,335.8900
Long. of periastron (ω)
324.90°
Angular separation (arcsec)
4.42000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.279
0 = alien, 1 = Earth-identical
Detection Signatures
Radial velocity
Stellar wobble has been measured spectroscopically.
Orbital-brightness modulation
Host star brightness varies with the planet's orbit.
Discovery Paper
Primary reference
Butler et al. 1997Instrument
Hamilton Echelle Spectrograph
Publication
1997-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 1996 at Lick Observatory (4 shown).
Host System: ups And
Spectral Class
F-type yellow-white
Effective Temperature
6,157 K — hotter than the Sun (5,778 K)
Estimated Age
5.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.560 R☉
Stellar Mass
1.300 M☉
Metallicity [Fe/H]
0.10
Extended Stellar Properties
Surface gravity (log g)
4.125 dex
Stellar density
0.370 g/cm³
Systemic radial velocity
-28.66 km/s
Rotational v·sin i
9.20 km/s
Rotation period
12.00 days
Activity index (log R'HK)
-5.040
Metallicity ratio
[M/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
74.571 mas
Total Proper Motion
419.857 mas/yr
PM Right Ascension
-172.25 mas/yr
PM Declination
-382.90 mas/yr
Galactic Cartesian (pc)
x = 0.684 · y = 0.307 · z = 0.661
Equatorial (J2000)
RA 24.19835° · Dec 41.40381°
Galactic ℓ, b
132.000° · -20.668°
Ecliptic λ, β
38.545° · 28.979°
HTM-20 index
1454011361
Observation Record
Photometric series
1
RV measurements
10
Stellar spectra
1
Archive notes
5
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