Pien

02816, 1950 NG, 1950NG, 1951 YX, 1951YX, 1955 TU, 1955TU, 1959 ND, 1959ND, 1964 RL, 1964RL, 1964 TQ2, 1964TQ2, 1976 JW2, 1976JW2, 1978 YS, 1978YS, 1982 SO, 1982SO, J50N00G, J51Y00X, J55T00U, J59N00D, J64R00L, J64T02Q, J76J02W, J78Y00S, J82S00O

All data for this body: [vot]

MPC data
Name (number) Pien (2816)
a 2.72509
e 0.18952
i / sin(i) 7.7173 / 0.13429
q 2.20863
Q 3.24154
ω 264.5388
Node 93.6026
m 166.8334
n 0.2191
Epoch 2460800.5
nobs 6038
nopp 32
Years observed 1951-2025
rms 0.59
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.727
ep 0.145
sin(ip) 0.118
G 0.150
H 12.100
Mass
D 27.24 0.262
pV 0.045 0.0031
Value
Rotational Period 80.310
Period quality 2
Spectral Class B
Spectral Class Score 7.900
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7269 0.1451 0.1181 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
19.75 5.790 5.790 Nugent 2016AJ....152...63N NEATM
20.12 4.020 4.020 Ali-Lagoa 2018A&A...612A..85A NEATM
20.80 0.810 0.810 Usui 2011PASJ...63.1117U NEATM
21.71 4.340 4.340 Ali-Lagoa 2018A&A...612A..85A NEATM
21.91 1.800 1.800 Tedesco 2002AJ....123.1056T STM
21.91 8.230 8.230 Masiero 2020PSJ.....1....5M NEATM
22.51 2.138 2.138 Ryan&Woodward 2010AJ....140..933R IRAS-STM
22.64 6.420 6.420 Masiero 2020PSJ.....1....5M NEATM
23.49 8.170 8.170 Nugent 2016AJ....152...63N NEATM
28.26 0.290 0.290 Masiero 2012ApJ...759L...8M NEATM
30.89 1.553 1.553 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.039 0.0041 0.0041 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.040 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.042 0.0060 0.0060 Masiero 2012ApJ...759L...8M NEATM
0.042 0.0270 0.0270 Masiero 2020PSJ.....1....5M NEATM
0.046 0.0410 0.0410 Masiero 2020PSJ.....1....5M NEATM
0.060 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.068 0.0270 0.0270 Ali-Lagoa 2018A&A...612A..85A NEATM
0.073 0.0125 0.0125 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.077 0.0140 0.0140 Tedesco 2002AJ....123.1056T STM
0.079 0.0320 0.0320 Ali-Lagoa 2018A&A...612A..85A 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
12.10 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
40.246 2 Synodic Pal 2020ApJS..247...26P Lightcurve
80.315 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
80.354 2 Sidereal Durech 2020A&A...643A..59D Model
80.459 2 Synodic McNeill 2019ApJS..245...29M Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
B Bus VIS Bus 2002Icar..158..146B SPEC
B C 0.580000 0.420000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
C 0.164 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT