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swap_horiz HD 128311 b Alternatives

Looking for alternatives to HD 128311 b? Compare the top Exoplanet options ranked by our AI scoring system.

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HD 128311 b

HD 128311 b

Exoplanet Warm Giant Radial Velocity Multi Planet K Star

HD 128311 b is a gas-giant exoplanet orbiting the K-type star HD 128311, about 53 light-years from Earth. It was detected through the radial-velocity technique used by the Anglo-Australian Planet Search and was reported in 2002. The planet is the inner member of a known multi-planet system. Its orbi...

6.5 Fair

apps Top HD 128311 b Alternatives

The top alternative to HD 128311 b in 2026 is Upsilon Andromedae b with a score of 8.0/10, followed by 55 Cancri b (7.8) and Epsilon Eridani b (7.8).

1
Upsilon Andromedae b

Upsilon Andromedae b

Upsilon Andromedae b is a hot Jupiter exoplanet discovered in 1996 orbiting the F-type main-sequence star Upsilon Androm...

Giant Radial Velocity Hot Jupiter Multi Planet
8.0 Great
2
55 Cancri b

55 Cancri b

55 Cancri b is a gas giant exoplanet orbiting the Sun-like star 55 Cancri (also designated Copernicus), located approxim...

Warm Giant Radial Velocity Multi Planet
7.8 Good
3
Epsilon Eridani b

Epsilon Eridani b

Epsilon Eridani b is a gas giant exoplanet orbiting the nearby K-type star Epsilon Eridani, located approximately 10.5 l...

Giant Cold Radial Velocity K Star
7.8 Good
4
Gliese 876 c

Gliese 876 c

Gliese 876 c is a gas giant exoplanet orbiting the red dwarf star Gliese 876, located approximately 15 light-years away...

Warm Resonance Giant Radial Velocity
7.5 Good
5
Upsilon Andromedae c

Upsilon Andromedae c

Upsilon Andromedae c is a giant exoplanet orbiting the F-type star Upsilon Andromedae. Announced in 1999 from radial-vel...

Warm Giant Radial Velocity Multi Planet
7.4 Good
6
HD 37124 b

HD 37124 b

HD 37124 b is a giant exoplanet orbiting the Sun-like star HD 37124, located roughly 100 light-years from Earth. It was...

Warm Giant Radial Velocity Multi Planet
6.6 Fair
7
HD 160691 b

HD 160691 b

HD 160691 b is a giant exoplanet orbiting the nearby G-type star mu Arae, also designated HD 160691. It was the first co...

Warm Giant Radial Velocity Multi Planet
6.6 Fair
8
HD 40307 c

HD 40307 c

HD 40307 c is a super-Earth-mass exoplanet orbiting the K-type star HD 40307. It was announced in 2008 from radial-veloc...

Warm Radial Velocity Super Earth Multi Planet
6.5 Fair
9
HD 40307 d

HD 40307 d

HD 40307 d is one of the planets first identified around the nearby K-type star HD 40307. It was reported in 2008 from r...

Warm Radial Velocity Super Earth Multi Planet
6.5 Fair
10
HD 128311 c

HD 128311 c

HD 128311 c is a gas-giant exoplanet orbiting the K-type star HD 128311, located roughly 53 light-years from Earth. The...

Giant Cold Radial Velocity Multi Planet
6.5 Fair
11
HD 192310 b

HD 192310 b

HD 192310 b is a planet with a minimum mass in the Neptune range orbiting the nearby K-type star HD 192310. Its existenc...

Warm Radial Velocity Super Earth Multi Planet
6.5 Fair
12
HD 3651 b

HD 3651 b

HD 3651 b is a giant exoplanet discovered through radial-velocity observations of the K-type star HD 3651. Reported in 2...

Warm Giant Eccentric Radial Velocity
6.4 Fair
13
HD 27442 b

HD 27442 b

HD 27442 b is a giant exoplanet orbiting Epsilon Reticuli, the subgiant star also designated HD 27442. It has a mass com...

Warm Giant Radial Velocity Habitable Zone
6.4 Fair
14
HD 142 b

HD 142 b

HD 142 b is a gas-giant exoplanet orbiting HD 142, a solar-type star in the constellation Phoenix. It was detected throu...

Warm Giant Radial Velocity Multi Planet
6.4 Fair
15
HD 177830 b

HD 177830 b

HD 177830 b is a giant exoplanet orbiting the star HD 177830, a K-type star. It was announced in 1999 by a team led by S...

Warm Giant Radial Velocity Habitable Zone
6.2 Fair
16
HD 192263 b

HD 192263 b

HD 192263 b is a giant exoplanet orbiting the K-type star HD 192263. It completes one orbit in roughly 24 days and was i...

Warm Giant Radial Velocity K Star
6.2 Fair
17
HD 12661 b

HD 12661 b

HD 12661 b is a gas-giant exoplanet orbiting the star HD 12661, a K-type star in the constellation Aries. It is the inne...

Warm Giant Radial Velocity Multi Planet
6.2 Fair
18
HD 13908 b

HD 13908 b

HD 13908 b is a gas-giant exoplanet orbiting the solar-type star HD 13908. Astronomers detected it through the radial-ve...

Warm Giant Radial Velocity Multi Planet
5.8 Mediocre
19
HD 183263 b

HD 183263 b

HD 183263 b is a gas-giant exoplanet orbiting the star HD 183263, a solar-type star in the constellation Lyra. It was de...

Warm Giant Radial Velocity Multi Planet
5.8 Mediocre
20
HD 99109 b

HD 99109 b

HD 99109 b is a confirmed exoplanet orbiting the K-type star HD 99109. It is a gas giant with a mass comparable to Satur...

Warm Giant Eccentric Radial Velocity
5.6 Mediocre

summarize Quick Comparison Summary

Alternative Score vs HD 128311 b Action
Upsilon Andromedae b
Upsilon Andromedae b
Exoplanet Giant Radial Velocity Hot Jupiter
8.0 Great +1.5 Compare
55 Cancri b
55 Cancri b
Exoplanet Warm Giant Radial Velocity
7.8 Good +1.3 Compare
Epsilon Eridani b
Epsilon Eridani b
Exoplanet Giant Cold Radial Velocity
7.8 Good +1.3 Compare
Gliese 876 c
Gliese 876 c
Exoplanet Warm Resonance Giant
7.5 Good +1.0 Compare
Upsilon Andromedae c
Upsilon Andromedae c
Exoplanet Warm Giant Radial Velocity
7.4 Good +0.9 Compare
HD 37124 b
HD 37124 b
Exoplanet Warm Giant Radial Velocity
6.6 Fair +0.1 Compare
HD 160691 b
HD 160691 b
Exoplanet Warm Giant Radial Velocity
6.6 Fair +0.1 Compare
HD 40307 c
HD 40307 c
Exoplanet Warm Radial Velocity Super Earth
6.5 Fair Same Compare
HD 40307 d
HD 40307 d
Exoplanet Warm Radial Velocity Super Earth
6.5 Fair Same Compare
HD 128311 c
HD 128311 c
Exoplanet Giant Cold Radial Velocity
6.5 Fair Same Compare

See all Exoplanet ranked by score

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help Frequently Asked Questions

What are the best alternatives to HD 128311 b?
The top alternatives to HD 128311 b in 2026 include Upsilon Andromedae b, 55 Cancri b, Epsilon Eridani b, Gliese 876 c, Upsilon Andromedae c. Each offers unique features and is objectively scored on Lunoo to help you compare.
How does HD 128311 b compare to its competitors?
Our AI-powered comparison system analyzes features, pricing, user reviews, and expert opinions to provide objective scores. HD 128311 b scores 6.5/10. Click any alternative above to see a detailed side-by-side comparison.
Is HD 128311 b worth it in 2026?
HD 128311 b scores 6.5/10 in the Exoplanet category. We recommend comparing it with the 20 alternatives listed above to find the best fit for your needs.
What is the best free alternative to HD 128311 b?
Several alternatives to HD 128311 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 HD 128311 b?
Common reasons users look for HD 128311 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 HD 128311 b are there?
Lunoo currently lists 20 scored alternatives to HD 128311 b in the Exoplanet category, ranked by our AI-powered evaluation system.
Which HD 128311 b alternative has the highest rating?
Upsilon Andromedae b currently holds the highest rating among HD 128311 b alternatives with a score of 8.0/10.
Can I use Upsilon Andromedae b instead of HD 128311 b?
Upsilon Andromedae b is one of the top-rated alternatives to HD 128311 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 HD 128311 b?
Pricing varies among HD 128311 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 HD 128311 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.
HD 128311 b vs Upsilon Andromedae b: which is better?
HD 128311 b scores 6.5/10 while Upsilon Andromedae b scores 8.0/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.
HD 128311 b vs 55 Cancri b: which is better?
HD 128311 b scores 6.5/10 while 55 Cancri b scores 7.8/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.
HD 128311 b vs Epsilon Eridani b: which is better?
HD 128311 b scores 6.5/10 while Epsilon Eridani b scores 7.8/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.

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Warm Giant Radial Velocity Exoplanet Multi Planet K Star

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