Astronomical evidence
PSR B1620-26 b belongs to a system containing a pulsar and a white dwarf in the globular cluster M4. Pulsar timing revealed an additional gravitational influence. Observations of the white dwarf helped constrain the system and supported a planetary interpretation with a mass near 2.5 ± 1 Jupiter masses. [1,2] Its inferred long history motivates the rich cluster sky. The exact age and dynamical assembly are interpretations of stellar evolution and orbital evidence. The catalog radius is a calculated value, not a transit measurement; the companion table retains that distinction.
The illustrated viewpoint
Six-limbed armored alien with an upright torso and folded sensory fins in meditation. An open painted cave on an invented rocky moon in the PSR B1620-26 system. The moon, cave, local conditions, artwork and being are invented. The ground extends outdoors through an open cave mouth. The dense star field evokes membership in M4 without reproducing a calculated sky. The pulsar and white dwarf are not rendered as giant suns or visible radio beams. Small fictional lamps supply the warm cave illumination; the organism's physiology is not a habitability claim.
The moon, cave, local conditions, artwork and being are invented. The ground extends outdoors through an open cave mouth. The dense star field evokes membership in M4 without reproducing a calculated sky. The pulsar and white dwarf are not rendered as giant suns or visible radio beams. Small fictional lamps supply the warm cave illumination; the organism's physiology is not a habitability claim. All beings and cultures are fictional. Apparent sizes, phases and exposure are artistic, not a calibrated sky simulation. Cosmic connection is a visual theme, not an observed biological mechanism.
Catalog measurements & sources
Host: PSR B1620-26. Snapshot: 25 September 2026. Errors, limits and source provenance are retained. Calculated values and model estimates are not direct measurements. Unknown is not zero; equilibrium temperature is not surface temperature.
| Quantity / unit | Value / reported errors | Source |
|---|---|---|
| Radius · Earth radii | 13.3 | Calculated Value |
| Mass · Earth masses | 794.575 (+317.83 / -317.83) | Sigurdsson et al. 2003 |
| Density · g/cm³ | 1.86 | Calculated Value |
| Orbital period · days | Unknown | Not supplied |
| Orbital semimajor axis · AU | 23 | Sigurdsson et al. 2003 |
| Eccentricity | Unknown | Not supplied |
| Inclination · degrees | Unknown | Not supplied |
| Irradiation · Earth flux | Unknown | Not supplied |
| Equilibrium temperature · K | Unknown | Not supplied |
| Stellar effective temperature · K | Unknown | Not supplied |
| Stellar radius · Solar | Unknown | Not supplied |
| Stellar mass · Solar | 1.35 | Sigurdsson et al. 2003 |
| Stellar luminosity · log Solar | Unknown | Not supplied |
| Stellar age · Gyr | Unknown | Not supplied |
| Stellar metallicity · dex | Unknown | Not supplied |
| Distance · pc | Unknown | Arzoumanian et al. 1996 |