1981 UB1

1981UB1, 05550, 1975 RQ2, 1975RQ2, 1977 AM, 1977AM, 1981 SP5, 1981SP5, 1983 CP2, 1983CP2, 1986 WD8, 1986WD8, J75R02Q, J77A00M, J81S05P, J81U01B, J83C02P, J86W08D

All data for this body: [vot]

MPC data
Name (number) 1981 UB1 (5550)
a 3.08833
e 0.18110
i / sin(i) 1.1145 / 0.01945
q 2.52905
Q 3.64761
ω 284.8595
Node 145.7832
m 220.5585
n 0.1816
Epoch 2460200.5
nobs 3340
nopp 29
Years observed 1954-2023
rms 0.57
Best values
[raw, vot]

Value Standard error
Parent Themis (24)
 
ap 3.092
ep 0.163
sin(ip) 0.016
Value Standard error
G 0.150
H 12.390
Mass
D 18.69 0.073
pV 0.073 0.0114
Rotational Period
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
24 Themis 602 Themis -0.6400 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.0919 0.1626 0.0162 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Oct-2022
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
18.32 0.110 0.110 Masiero 2014ApJ...791..121M NEATM
18.99 0.097 0.097 Masiero 2011ApJ...741...68M NEATM
19.40 6.280 6.280 Nugent 2016AJ....152...63N NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.060 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.071 0.0147 0.0147 Masiero 2011ApJ...741...68M NEATM
0.080 0.0200 0.0200 Masiero 2014ApJ...791..121M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
12.39 MPC-2023-12-04 MPC-2023-12-04 Phot