Bright NEO

The below near-earth objects are expected to become brighter than magnitude 14.0 in the coming 12 months. If a NEO is currently brighter than magnitude 14 it will be highlighted in yellow. For more information about one of these near-earth objects, click on its designation.

NEO Today Closest Approach Brightest
designation Hₒ diameter est. magn delta (LD) date delta (LD) magn date magn
1999 RM4519.5335 - 750 m20.3220.2 LD2 Mar 20217.6 LD14.21 Mar 202113.5
(231937) 2001 FO3217.7765 - 1715 m21.0515.5 LD21 Mar 20215.4 LD12.921 Mar 202111.7
(285571) 2000 PQ918.1640 - 1425 m22.2707.1 LD21 Jul 202126.3 LD12.920 Jul 202112.7
2016 AJ19318.5530 - 1185 m24.71604.0 LD21 Aug 20218.9 LD14.520 Aug 202113.5
(4660) Nereus18.3580 - 1295 m22.61163.1 LD11 Dec 202110.6 LD12.97 Dec 202112.6
(163899) 2003 SD22017.9700 - 1565 m20.2519.1 LD17 Dec 202114.1 LD14.113 Dec 202113.8


The current positions of these NEOs are plotted in the below all-sky chart:





    Terminology:
            
    diameter est.:  Estimated diameter based on Hₒ and an albedo between 0.25 and 0.05 (So sizes may be over-estimated for icy objects)
    delta:          Distance between dwarf planet and earth in AU    
    magn:           Magnitude (brightness) estimate    
    LD:             Lunar distance (~0.0257 AU)
    AU:             Astronomical Unit (mean distance between earth and sun: 149597870.7 km    
    Hₒ:             Absolute magnitude (magnitude from a distance of 1 AU) 
    

Orbital elements provided by the MPC (Minor Planet Center).
UCAC4 star catalog via VizieR as provided by the Strasbourg astronomical Data Center.
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.