Downs

1999 RP176, 1999RP176, 24027, J99RH6P

All data for this body: [vot]

MPC data
Name (number) Downs (24027)
a 2.44902
e 0.15715
i / sin(i) 2.0062 / 0.03501
q 2.06416
Q 2.83387
ω 171.6718
Node 241.3530
m 204.3752
n 0.2572
Epoch 2460800.5
nobs 1837
nopp 20
Years observed 1992-2025
rms 0.75
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.449
ep 0.144
sin(ip) 0.050
G 0.150
H 15.460
Mass
D 5.80 0.161
pV 0.036 0.0050
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 3.142
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4490 0.1440 0.0497 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.24 1.450 1.450 Nugent 2016AJ....152...63N NEATM
5.81 0.164 0.164 Masiero 2011ApJ...741...68M NEATM
5.84 1.740 1.740 Masiero 2021PSJ.....2..162M NEATM
5.86 2.230 2.230 Masiero 2020PSJ.....1....5M NEATM
6.20 2.273 2.273 Masiero 2017AJ....154..168M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.031 0.0358 0.0358 Masiero 2017AJ....154..168M NEATM
0.036 0.0053 0.0053 Masiero 2011ApJ...741...68M NEATM
0.039 0.0180 0.0350 Masiero 2021PSJ.....2..162M NEATM
0.039 0.0350 0.0350 Masiero 2020PSJ.....1....5M NEATM
0.040 0.0300 0.0300 Nugent 2016AJ....152...63N 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
15.46 MPC-2023-12-04 MPC-2023-12-04 Phot
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C C 0.5237 0.5237 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT