Planet Helix Nebula b

Detailed information about planet Helix Nebula b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

Helix Nebula b

Planet Status

Candidate

Discovered in

2024

Update

2024-10-08

Mass

—

Mass*sin(i)

—

Semi-Major Axis

0.034 AU

Orbital Period

2.79 day 1 publication

Novel Constraints on Companions to the Helix Nebula Central Star

Eccentricity

—

ω

—

T_peri

—

Radius

0.021

R_J 1 publication

Novel Constraints on Companions to the Helix Nebula Central Star

Inclination

25.0 deg 1 publication

Novel Constraints on Companions to the Helix Nebula Central Star

Detection Method

Primary Transit

Mass Meas. Method

—

Radius Meas. Method

Theoretical

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

4970.0 K 1 publication

Novel Constraints on Companions to the Helix Nebula Central Star

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

—

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Iskandarli et al. (2024): There are two possible solutions to observed 2.8 d periodicity, either a Jupiter-sized body with 0.102 R_Sol with arbitrarily small orbital inclination (i > 1°) or a 0.021 R_Sol with i ≈ 25°, essentially aligned with the Helix Nebula's inclination. The latter option is more likely.
Additionally companions as cool or cooler than an L5 dwarf (T ≃ 1700 K) would remain undetected within 1200 AUs from Helix Nebula along with putative faint white dwarfs and/or cold brown dwarfs as possible surviving objects as architects of the nebular asymmetries.

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