2023 RB

2023 RB
Discovery[1]
Discovered by	Pan-STARRS 2
Discovery site	Haleakalā Observatory
Discovery date	04 September 2023
Designations
MPC designation	2023 RB
Alternative designations	P11IxKf
Minor planet category	Centaur
Orbital characteristics[2]
	Uncertainty parameter 2
Observation arc	10.3 years
Aphelion	46.9 AU (Q)
Perihelion	8.35 AU[3] (q)
Semi-major axis	27.5 AU (a)
Eccentricity	0.70496 (e)
Orbital period (sidereal)	144.3 years
Mean anomaly	350.6° (M)
Inclination	4.667° (i)
Longitude of ascending node	137.5° (Ω)
Time of perihelion	6 March 2027[3]
Argument of perihelion	257.4° (ω)
Saturn MOID	0.014 AU (2.1 million km)[4]
Uranus MOID	0.019 AU (2.8 million km)
Physical characteristics
Mean diameter	20–50 km
Absolute magnitude (H)	10.5[4]

2023 RB is a Centaur that makes close approaches to Saturn and Uranus. It is approximately 20–50 kilometers (12–31 miles) in diameter. On 25 September 2024 it will pass 0.261 AU (39.0 million km) from Saturn.[2] On 6 March 2027 it will come to perihelion 8.35 AU (1.2 billion km) from the Sun.[3] Then around January 2201, it will make a second close approach to Saturn of 0.074 AU (11.1 million km) ± 6.5 million km.[5]

2023 RB closest Saturn approach around January 2201[5]
Date and time of closest approach	Saturn distance (AU)	Sun distance (AU)	Velocity relative to Saturn (km/s)	Velocity relative to Sun (km/s)	Uncertainty region (3-sigma)
≈January 2201	0.074 AU (11.1 million km; 6.9 million mi; 29 LD)	9.67 AU (1.447 billion km; 899 million mi)	5.0	13.5	± 6.5 million km

References

"MPEC 2023-R16 : 2023 RB". IAU Minor Planet Center. 5 September 2023. Retrieved 11 September 2023. (K23R00B)
"JPL Small-Body Database : (2023 RB)". Jet Propulsion Laboratory. Retrieved 11 September 2023.
"Horizons Batch for 2023 RB on 2027-Mar-06" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 11 September 2023.
"2023 RB Orbit". Minor Planet Center. Retrieved 11 September 2023.
"Horizons Batch for 2023 RB (from Saturn) on 2201-Jan-05" (closest Saturn approach occurs when deldot flips from negative to positive). JPL Horizons. Retrieved 11 September 2023.

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[MPEC2023-R16-1] "MPEC 2023-R16 : 2023 RB". IAU Minor Planet Center. 5 September 2023. Retrieved 11 September 2023. (K23R00B)

[jpldata-2] "JPL Small-Body Database : (2023 RB)". Jet Propulsion Laboratory. Retrieved 11 September 2023.

[Perihelion-3] "Horizons Batch for 2023 RB on 2027-Mar-06" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 11 September 2023.

[MPC-object-4] "2023 RB Orbit". Minor Planet Center. Retrieved 11 September 2023.

[Saturn2201-5] "Horizons Batch for 2023 RB (from Saturn) on 2201-Jan-05" (closest Saturn approach occurs when deldot flips from negative to positive). JPL Horizons. Retrieved 11 September 2023.