search
Get Started
search

swap_horiz 51 Pegasi b Alternatives

Looking for alternatives to 51 Pegasi b? Compare the top Exoplanet options ranked by our AI scoring system.

You're looking at alternatives to:
51 Pegasi b

51 Pegasi b

51 Pegasi b is a gas giant exoplanet orbiting the Sun-like star 51 Pegasi. Its discovery in 1995 marked the first confirmation of an exoplanet around such a star. This “hot Jupiter” planet’s existence was determined through radial velocity measurements, offering scientists a crucial early example fo...

9.1 Excellent

apps Top 51 Pegasi b Alternatives

The top alternative to 51 Pegasi b in 2026 is HD 209458 b with a score of 9.6/10, followed by KELT-9b (9.5) and HD 189733 b (9.4).

1
HD 209458 b

HD 209458 b

HD 209458 b is a giant exoplanet orbiting a Sun-like star approximately 153 light-years away. It gained significant atte...

Giant Hot Jupiter Transiting Atmosphere Detected
9.6 Brilliant
2
KELT-9b

KELT-9b

KELT-9b is a giant exoplanet orbiting the star HD 189733A. It’s notable as the hottest known planet, boasting a dayside...

Giant Hot Jupiter Transiting Ultrahot
9.5 Brilliant
3
HD 189733 b

HD 189733 b

HD 189733 b is a gas giant exoplanet orbiting a Sun-like star approximately 63 light-years away. It’s notable for posses...

Blue Planet Giant Atmosphere Hot Jupiter
9.4 Excellent
4
WASP-76b

WASP-76b

WASP-76b is an exoplanet orbiting a distant star, classified as a “hot Jupiter.” Its notable characteristic is its extre...

Giant Atmosphere Hot Jupiter Transiting
9.3 Excellent
5
WASP-96b

WASP-96b

WASP-96b is a giant exoplanet orbiting a star approximately 843 light-years away. Its atmosphere was studied extensively...

Giant Atmosphere Hot Jupiter Transiting
9.2 Excellent
6
WASP-39b

WASP-39b

WASP-39b is a giant exoplanet orbiting a Sun-like star approximately 700 light-years away. The James Webb Space Telescop...

Giant Atmosphere Hot Jupiter Transiting
9.1 Excellent
7
WASP-12b

WASP-12b

WASP-12b is a massive exoplanet orbiting the star WASP-12. This “hot Jupiter” exhibits an exceptionally short orbital pe...

Giant Hot Jupiter Transiting Tidally Distorted
8.9 Great
8
WASP-121b

WASP-121b

An ultra-hot Jupiter with a detected stratosphere and dayside temperatures exceeding 2,400 K, orbiting its host star in...

Giant Atmosphere Hot Jupiter Transiting
8.8 Great
9
TrES-2b

TrES-2b

The darkest known exoplanet, reflecting less than 1% of incident starlight, discovered by the TrES survey in 2006 and su...

Giant Hot Jupiter Transiting Kepler Target
8.8 Great
10
WASP-189b

WASP-189b

A very hot Jupiter orbiting a bright A-type star, studied intensively by ESA's CHEOPS mission and among the hottest know...

Giant Hot Jupiter Transiting Ultrashort Period
8.7 Great
11
WASP-17b

WASP-17b

The first exoplanet confirmed to orbit in a retrograde direction relative to its host star's rotation, announced by the...

Giant Hot Jupiter Transiting Retrograde Orbit
8.6 Great
12
HAT-P-7b

HAT-P-7b

A hot Jupiter in the Cygnus field whose reflected starlight and orbital phase curve were detected by NASA's Kepler teles...

Retrograde Giant Hot Jupiter Transiting
8.4 Great
13
Tau Boötis b

Tau Boötis b

A hot Jupiter discovered in 1996 around Tau Boötis, notable as one of the first exoplanets to have its atmospheric compo...

Giant Radial Velocity Hot Jupiter F Star
8.3 Great
14
Gliese 876 b

Gliese 876 b

Gliese 876 b is a Jupiter-mass planet orbiting the nearby M-dwarf Gliese 876 ~15 light-years away, discovered in 1998, a...

Resonance Giant Cold Radial Velocity
8.1 Great
15
Upsilon Andromedae b

Upsilon Andromedae b

A hot Jupiter discovered in 1996 around Upsilon Andromedae, later recognized as part of the first confirmed multi-planet...

Giant Radial Velocity Hot Jupiter Multi Planet
8.0 Great
16
HAT-P-32b

HAT-P-32b

A highly inflated hot Jupiter with one of the largest known radii for its mass class, making it a prime target for trans...

Giant Inflated Hot Jupiter Transiting
7.8 Good
17
47 Ursae Majoris b

47 Ursae Majoris b

A Jupiter analog discovered in 1996 orbiting 47 Ursae Majoris at 2.1 AU in a nearly circular orbit, one of the first lon...

Giant Cold Radial Velocity Sun Like
7.8 Good
18
HD 217107 b

HD 217107 b

HD 217107 b is a hot Jupiter with an orbital period of ~7.1 days discovered in 1998 by Fischer et al., among the early c...

Giant Eccentric Radial Velocity Hot Jupiter
6.4 Fair
19
HD 130322 b

HD 130322 b

HD 130322 b is a hot Jupiter with an orbital period of ~10.7 days around HD 130322, discovered in 1999 by Udry et al. us...

Giant Eccentric Radial Velocity Hot Jupiter
6.2 Fair
20
XO-1b

XO-1b

A hot Jupiter discovered in 2006 by the XO wide-field photometric survey and among the earliest transiting exoplanets to...

Giant Radial Velocity Hot Jupiter Transiting
5.5 Mediocre

summarize Quick Comparison Summary

Alternative Score vs 51 Pegasi b Action
HD 209458 b
HD 209458 b
Exoplanet Giant Hot Jupiter Transiting
9.6 Brilliant +0.5 Compare
KELT-9b
KELT-9b
Exoplanet Giant Hot Jupiter Transiting
9.5 Brilliant +0.4 Compare
HD 189733 b
HD 189733 b
Exoplanet Blue Planet Giant Atmosphere
9.4 Excellent +0.3 Compare
WASP-76b
WASP-76b
Exoplanet Giant Atmosphere Hot Jupiter
9.3 Excellent +0.2 Compare
WASP-96b
WASP-96b
Exoplanet Giant Atmosphere Hot Jupiter
9.2 Excellent +0.1 Compare
WASP-39b
WASP-39b
Exoplanet Giant Atmosphere Hot Jupiter
9.1 Excellent Same Compare
WASP-12b
WASP-12b
Exoplanet Giant Hot Jupiter Transiting
8.9 Great -0.2 Compare
WASP-121b
WASP-121b
Exoplanet Giant Atmosphere Hot Jupiter
8.8 Great -0.3 Compare
TrES-2b
TrES-2b
Exoplanet Giant Hot Jupiter Transiting
8.8 Great -0.3 Compare
WASP-189b
WASP-189b
Exoplanet Giant Hot Jupiter Transiting
8.7 Great -0.4 Compare

See all Exoplanet ranked by score

emoji_events View Full Exoplanet Rankings

help Frequently Asked Questions

What are the best alternatives to 51 Pegasi b?
The top alternatives to 51 Pegasi b in 2026 include HD 209458 b, KELT-9b, HD 189733 b, WASP-76b, WASP-96b. Each offers unique features and is objectively scored on Lunoo to help you compare.
How does 51 Pegasi b compare to its competitors?
Our AI-powered comparison system analyzes features, pricing, user reviews, and expert opinions to provide objective scores. 51 Pegasi b scores 9.1/10. Click any alternative above to see a detailed side-by-side comparison.
Is 51 Pegasi b worth it in 2026?
51 Pegasi b scores 9.1/10 on Lunoo, making it a highly-rated option in the Exoplanet category. However, alternatives like HD 209458 b may better suit specific needs.
What is the best free alternative to 51 Pegasi b?
Several alternatives to 51 Pegasi b offer free plans or free tiers. Check the alternatives listed above and visit their websites to compare pricing and free options.
Why should I switch from 51 Pegasi b?
Common reasons users look for 51 Pegasi b alternatives include pricing, specific feature gaps, better integration needs, or simply exploring newer options. Our objective scoring helps you compare without bias.
How many alternatives to 51 Pegasi b are there?
Lunoo currently lists 20 scored alternatives to 51 Pegasi b in the Exoplanet category, ranked by our AI-powered evaluation system.
Which 51 Pegasi b alternative has the highest rating?
HD 209458 b currently holds the highest rating among 51 Pegasi b alternatives with a score of 9.6/10.
Can I use HD 209458 b instead of 51 Pegasi b?
HD 209458 b is one of the top-rated alternatives to 51 Pegasi b. While they serve similar purposes in the Exoplanet space, each has distinct strengths. Use our comparison tool above for a detailed side-by-side analysis.
What is the cheapest alternative to 51 Pegasi b?
Pricing varies among 51 Pegasi b alternatives. We recommend checking each alternative's website for current pricing. Many options in the Exoplanet category offer free tiers or competitive pricing.
How are 51 Pegasi b alternatives ranked on Lunoo?
Lunoo uses an AI-powered scoring system that analyzes category fit, feature coverage, pricing signals, public reception, recency, and value to provide 0 to 10 scores. Rankings are updated continuously.
51 Pegasi b vs HD 209458 b: which is better?
51 Pegasi b scores 9.1/10 while HD 209458 b scores 9.6/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.
51 Pegasi b vs KELT-9b: which is better?
51 Pegasi b scores 9.1/10 while KELT-9b scores 9.5/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.
51 Pegasi b vs HD 189733 b: which is better?
51 Pegasi b scores 9.1/10 while HD 189733 b scores 9.4/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.

Compare Items

See how they stack up against each other

Comparing
VS
Select 1 more item to compare