(69987) 1998 WA25

(69987) 1998 WA₂₅

Discovery
Discovered by	Marc W. Buie
Discovery date	19 November 1998
Designations
MPC designation	(69987) 1998 WA25
Alternative names	none
Minor planet category	TNO (cubewano)[1][2]
Orbital characteristics[3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 4
Observation arc	6286 days (17.21 yr)
Aphelion	43.32069456 AU (6.480683663 Tm)
Perihelion	41.68588686 AU (6.236119912 Tm)
Semi-major axis	42.50329071 AU (6.358401788 Tm)
Eccentricity	0.019232
Orbital period	100617 d (275.47 a)[4]
Average orbital speed	?
Mean anomaly	77.869649°
Mean motion	0° 0^m 12.805^s / day
Inclination	1.0460532°
Longitude of ascending node	136.42243°
Argument of perihelion	215.78168°
Earth MOID	40.6787 AU (6.08545 Tm)
Jupiter MOID	36.7042 AU (5.49087 Tm)
Physical characteristics
Dimensions	160 km[5]
Mass	? kg
Mean density	? g/cm³
Equatorial surface gravity	? m/s²
Equatorial escape velocity	? km/h
Sidereal rotation period	? d
Geometric albedo	0.09 (assumed)
Temperature	? K
Spectral type	?
Absolute magnitude (H)	7.0

(69987) 1998 WA₂₅, also written as (69987) 1998 WA25, is a cubewano. It has a perihelion (closest approach to the Sun) at 41.457 AU and an aphelion (farthest approach from the Sun) at 43.217 AU. It is about 160 km in diameter. It was discovered on November 19, 1998, by Marc W. Buie.

References

1. "MPEC 2009-R09 :Distant Minor Planets (2009 SEPT. 16.0 TT)". IAU Minor Planet Center. 2009-09-04. Retrieved 2009-10-04.
2. Marc W. Buie. "Orbit Fit and Astrometric record for 69987". SwRI (Space Science Department). Retrieved 2009-10-04. 2003-10-22 using 15 observations
3. "JPL Small-Body Database Browser: 69987 (1998 WA25)". NASA/Jet Propulsion Laboratory. Retrieved 6 April 2016.
4. AstDyS: (69987) 1998WA25
5. List of known trans-Neptunian objects

1. http://cfa-www.harvard.edu/iau/lists/TNOs.html

External links

• (69987) 1998 WA25 at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters