Astrophyzix Near-Earth Object (NEO) Close Approach Report: (2026 GD) — Updated Solution (JPL 2) - Real Time NEO News
Written by: Astrophyzix Digital Observatory
Introduction
Asteroid (2026 GD) is an Apollo-class near-Earth object (NEO) currently undergoing rapid orbital refinement following its recent discovery in April 2026. This report is a follow-up of our initial report and is based on the updated JPL solution (Solution 2), incorporating an expanded observational dataset and improved orbital constraints.
The object is notable for an exceptionally close Earth flyby occurring on April 9, 2026, within lunar distance. Although the orbit remains classified with moderate uncertainty, current data provides a consistent and stable close-approach solution with no indication of impact risk.
Key Takeaways
- Very close Earth approach on 2026-Apr-09 at 22:59 (TBD) at ~0.00168 AU.
- Equivalent to approximately 0.65 lunar distances (~251,000 km).
- Relative velocity: ~12.66 km/s.
- Small object (~20–30 meters estimated diameter).
- Earth MOID: 0.000525 AU (very low orbital intersection distance).
- Orbit refined using 117 observations over 2 days.
- Condition code remains 7 (moderate uncertainty).
- No impact threat identified.
Scientific Consensus Snapshot
The updated orbital solution reflects improved constraint quality due to an increased number of observations and an extended data arc. While uncertainties have decreased across all orbital parameters, the orbit remains in an early refinement stage.
Close approach predictions are now more precise, particularly in timing, but continued observation is required to fully stabilise the solution.
Orbital Profile
- Orbit Type: Apollo-class (Earth-crossing)
- Semi-major axis (a): 1.46087 AU
- Eccentricity (e): 0.4537
- Inclination (i): 0.353°
- Perihelion (q): 0.79805 AU
- Aphelion (Q): 2.12369 AU
- Orbital Period: ~644.93 days (~1.77 years)
- Earth MOID: 0.000525 AU (~78,600 km)
- Tisserand Parameter (Jupiter): 4.506
Physical Characteristics
- Absolute Magnitude (H): 26.56
- Estimated Diameter: ~20–30 meters
- Surface Properties: Not constrained
Objects in this size range are typically small enough to disintegrate in Earth’s atmosphere, although airburst events remain possible depending on composition and entry dynamics.
Close Approach Analysis
| Date (TDB) | Body | Distance (AU) | Distance (LD) | Velocity (km/s) | Timing Uncertainty |
|---|---|---|---|---|---|
| 2026-Apr-09 | Earth | 0.00168 | ~0.65 LD | 12.66 | ± 2 minutes |
| 2026-Apr-10 | Moon | 0.00109 | ~0.42 LD | 11.69 | ± 2 minutes |
2026 Close Approach Context
The 9th April 2026 encounter places (2026 GD) well within the lunar-distance threshold, making it one of the closer known asteroid flybys for this period. The updated solution significantly improves the timing precision of the encounter, now constrained to within approximately two minutes.
The object passes Earth first, followed shortly by a close approach to the Moon. This geometry provides a valuable opportunity for high-precision tracking and potential radar observation, which could further refine the orbital solution.
Dynamical Context
The orbit of (2026 GD) is characterised by low inclination and moderate eccentricity, resulting in repeated crossings of Earth’s orbital plane. Its extremely low MOID indicates a strong geometric alignment with Earth's orbit, although encounter timing determines actual proximity.
Backward orbital integrations show wide uncertainty ranges for historical encounters, reflecting the current limitations in long-term trajectory modelling for this object.
Risk Assessment
- No impact risk identified in current JPL or CNEOS datasets.
- Close approach distance remains stable across solutions.
- Timing uncertainty significantly reduced with updated observations.
- Condition code 7 indicates continued need for refinement.
The updated data strengthens confidence in the predicted flyby while maintaining a conservative assessment due to the relatively short observational arc.
Conclusion
Asteroid (2026 GD) represents a well-tracked, close-passing near-Earth object currently transitioning from initial discovery to refined orbital characterisation. The updated solution confirms a stable and non-threatening trajectory during its April 2026 encounter.
Further observations are expected to reduce uncertainty and potentially lower the orbit condition code, but current data already provides strong confidence in the safety of this flyby.
Sources
- NASA JPL Small-Body Database – (2026 GD)
- JPL Horizons Ephemeris (SPKID: 54607483)
- NASA Sentry Impact Risk Table
- NASA CNEOS Close Approach Database