+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1271 Isergina (1931 TN) Classification: Main-belt Asteroid          SPK-ID: 2001271 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 48 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1206826325390487 9.1023e-09   a 3.14016442608331 1.1428e-08 au q 2.761201116538106 2.6379e-08 au i 6.683332669713588 5.1728e-07 deg node 126.8421820515861 4.3144e-06 deg peri 271.9005697663517 1.242e-05 deg M 45.47443924158082 9.1461e-06 deg tp 2459139.760989874204 (2020-Oct-17.26098987) 5.1755e-05 TDB period 2032.483416766888 5.56 1.1095e-05 3.038e-08 d yr n .1771232163717523 9.6691e-10 deg/d Q 3.519127735628515 1.2807e-08 au   Orbit Determination Parameters    # obs. used (total)      3624      data-arc span      42006 days (115.01 yr)      first obs. used      1906-04-17      last obs. used      2021-04-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .39374      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 12:10:54   Additional Information  Earth MOID = 1.77871 au   Jupiter MOID = 1.91946 au   T_jup = 3.189  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 10.42   n/a E2021B10   diameter diameter 47.524 km 0.383 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 7.59932 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Aznar, A.M.; Carreno Garcerain, A.; Arce Masego, E.; Brines Rodriques, P.; et al. (2016) Minor Planet Bull. 43, 257-263.] [Benishek, V. (2016) Minor Planet Bull. 43, 339-342.] geometric albedo albedo 0.031   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 1271 Isergina (1931 TN)          Discovered 1931-Oct-10 by Neujmin, G. at Simeis Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1931 TN = 1930 MK = 1932 CK1 = 2003 RV22 = 2019 GW35 = A906 HD  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-28 04:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin