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2010-3-14Discovery - C/2010 D4 (WISE):
Elements:
  T = 2009 Mar. 30.939 TT,
  q = 7.17413 AU, Peri. = 43.916 deg,
  Node = 266.488 deg, i = 105.482 deg,
  equinox 2000.0
Discovery - P/2010 E2 (JARNAC): 18m7
Elements:
     T = 2010 Apr.  7.8086 TT         Peri. =   8.2567
     e = 0.721879                     Node  = 177.8984  2000.0
     q = 2.397960 AU                  Incl. =  15.4256
       a =  8.621986 AU    n = 0.0389308    P =  25.3 years
(IAUC 9125)
Discovery - C/2010 E1 (GARRADD: 17m4
Elements:
     T = 2009 Oct. 24.604 TT          Peri. = 291.168
                                      Node  = 169.281   2000.0
     q = 2.56144 AU                   Incl. =  71.721
(IAUC 9124)
2010-3-11Entdeckung - C/2010 DG_56 (WISE)
Elemente:
     T = 2010 May  13.5729 TT         Peri. = 317.0731
                                      Node  =   4.0718  2000.0
     q = 1.612228 AU                  Incl. = 160.3957
(IAUC 9123)
2010-3-10Discovery - C/2010 D3 (WISE): 20m5
Elements:
     T = 2010 Sept. 2.349 TT          Peri. = 304.535
                                      Node  = 255.193   2000.0
     q = 4.23610 AU                   Incl. =  76.354
(IAUC 9122)
2010-3-7Discovery - C/2010 D2 (WISE): 19m5.
Elemente:
     T = 2010 July  2.834 TT          Peri. = 143.791
                                      Node  = 317.646   2000.0
     q = 3.66164 AU                   Incl. =  57.971
Water production rates - 67P/CHURYUMOV-GERASIMENKO
Date    r/AU    Q(H2O) in 10**(27) molecules/s
March
 2.53,  1.248    4.8 
 3.95,  1.248,   4.8;
 5.36,  1.249,   4.9;
 6.78,  1.250,   5.2;
 8.20,  1.251,   4.3;
 9.61,  1.253,   5.3;
11.03,  1.254,   5.8;
12.45,  1.256,   6.5;
13.86,  1.258,   6.0;
15.28,  1.261,   8.0;
16.70,  1.263,   8.9;
18.11,  1.266,   8.1;
19.53,  1.270,   7.6;
20.95,  1.273,   7.5;
22.35,  1.276,   6.8;
23.77,  1.280,   7.0;
25.19,  1.284,   5.3;
26.60,  1.288,   7.8;
28.02,  1.293,   8.4;
April
 8.35,  1.335,   7.9;
 9.77,  1.341,  11.1;
11.18,  1.348,   6.1;
12.60,  1.354,   4.3;
14.01,  1.361,   5.9;
15.42,  1.368,   5.3;
16.84,  1.375,   4.8;
18.26,  1.382,   3.3;
19.68,  1.389, < 2.5
The values were calculated from Lyman Halpha brightness and distribution measurings.
(IAUC 9121)
2010-3-2Permanent number - 233P/LA SAGRA = P/2009 WJ_50 = 2005 JR_71
(IAUC 9119)
2010-2-20 Discovery - P/2010 D1 (WISE): 21m5
Elements:
                    Epoch = 2009 June 18.0 TT
     T = 2009 June 25.5899 TT         Peri. = 225.9003
     e = 0.356553                     Node  = 160.9008  2000.0
     q = 2.668963 AU                  Incl. =   9.6471
       a =  4.147912 AU    n = 0.1166702    P =   8.45 years
(IAUC 9118)
2010-2-16 Discovery - P/2009 WJ_50 (LA SAGRA): 18m7
An apparently asteroidal object discovered last November was found to be a comet.
Elements:
                    Epoch = 2010 Mar. 25.0 TT
     T = 2010 Mar. 12.4032 TT         Peri. =  27.1295
     e = 0.409774                     Node  =  74.9958  2000.0
     q = 1.791561 AU                  Incl. =  11.2759
       a =  3.035382 AU    n = 0.1863735    P =   5.29 years
Sonnenstreifer - C/2009 Y3 AND C/2009 Y4 (STEREO): Kreutz-Gruppe.
(IAUC 9117)
2010-2-10 Discovery - P/2010 C1 (SCOTTI): 20m2
Elements:
                  Epoch = 2009 Nov. 25.0 TT
     T = 2009 Dec.  1.2703 TT         Peri. =   3.6353
     e = 0.258847                     Node  = 142.0341  2000.0
     q = 5.235048 AU                  Incl. =   9.1426
       a =  7.063383 AU    n = 0.0525031    P =  18.77 years
Sun grazer - C/2009 Q8, C/2009 V1, C/2009 V2 (SOHO). Kreutz group.
(IAUC 9116)
2010-2-9 Sun grazer- C/2009 N2, C/2009 N3, C/2009 O5, C/2009 P3 (SOHO): Kreutz group except N3.
(IAUC 9114)
Discovery - P/2010 B2 (WISE): 20m2
Elements:
                    Epoch = 2010 Jan.  4.0 TT
     T = 2009 Dec. 20.8910 TT         Peri. = 155.4007
     e = 0.463138                     Node  =   0.6617  2000.0
     q = 1.606972 AU                  Incl. =   8.8897
       a =  2.993271 AU    n = 0.1903203    P =   5.18 years
Sun grazer - C/2009 P4, C/2009 P5, C/2009 Q6, C/2009 Q7 (SOHO)
(IAUC 9115)
2010-2-4 Outburst - 29P/Schwassmann-Wachmann
Still stellar, 11m5
(CBET 2160)
2010-1-31 Discovery - C/2010 B1 (CARDINAL): 17m7
Elements:
     T = 2011 Feb.  6.807 TT          Peri. = 211.674
                                      Node  = 277.262   2000.0
     q = 2.93361 AU                   Incl. = 101.937
Sun grazer - C/2009 M6-M8, C/2009 N1 (SOHO): M6 und M7: Kreutz group. M8 und C/2009 N1: no group.
(IAUC 9113)
2010-1-28 Sun grazer - C/2009 M4 & C/2009 M5 (SOHO): Kreutz group
(IAUC 9112)
2010-1-26 Internal: The "Smithsonian Astrophysical Observatory" cann not sustain the CBAT financially anymore. The CBAT is looking for a new sponsoring organisation. During the interim period, SAO will not be able to accept subscriptions.
Physical properties - P/2010 A2 (LINEAR):
Z. Sekanina, Jet Propulsion Laboratory, concludes from observations of the comets' tail, made in teh fiist half of January:  The tail was formed between January and August 2009. It is not clear whether the tail is a product of one or more brief emission events or continuous activity over a period of time.
(IAUC 9110)
2010-1-24 Discovery -  C/2010 B1 (CARDINAL): 17m7
Elements:
     T = 2011 Feb. 6.708 TT           Peri. = 211.920
                                      Node  = 277.336   2000.0
     q = 2.92257 AU                   Incl. = 101.867
(CBET 2141)
2010-1-20 improved elements - P/2010 A2 (LINEAR):
  T = 2009 Nov. 17.248 TT, q = 1.97580 AU,
  e = 0.13178, Peri. = 125.600 deg,
  Node = 321.073 deg, i = 5.099 deg
 (equinox 2000.0), P = 3.43 years.
(IAUC 9109)
2010-1-17 Discovery - P/2010 A5 (LINEAR): 17m7
Elements:
     T = 2010 Apr. 20.601 TT          Peri. = 307.527
     e = 0.67268                      Node  = 278.071   2000.0
     q = 1.70451 AU                   Incl. =   5.789
       a =  5.20739 AU     n = 0.082942     P =  11.9 years
improved Elements - P/2010 A3 (HILL)
epoch 2010 Mar. 25.0
   T = 2010 Apr. 3.6804 TT, e = 0.732116,
   q = 1.621774 AU, i = 15.0270 deg,
   Peri. = 41.2825 deg, Node = 64.8307 deg
   (equinox 2000.0), P = 14.9 years.
(IAUC 9108)
2010-1-14 Discovery - C/2010 A4 (SIDING SPRING): 18m7
Elements:
     T = 2010 Oct.  8.813 TT          Peri. = 272.446
                                      Node  = 346.731   2000.0
     q = 2.70743 AU                   Incl. =  96.846
Of short period - P/2010 A1 (HILL). cf. IAUC 9104.
Elements:
     T = 2009 Aug.  9.353 TT          Peri. =  13.869
     e = 0.55136                      Node  =  47.080   2000.0
     q = 1.94218 AU                   Incl. =  10.265
       a =  4.32903 AU     n = 0.109426     P =   9.01 years
(IAUC 9107)
2010-1-10 Discovery - C/2010 A1 (HILL): 17m6
Elements:
     T = 2010 June 24.055 TT          Peri. = 219.047
                                      Node  =   6.140   2000.0
     q = 1.02031 AU                   Incl. =  11.782

(IAUC 9104)
Discovery- P/2010 A2 (LINEAR): 19m9
Elements:
     T = 2010 May   7.565 TT          Peri. = 227.300
     e = 0.63483                      Node  = 313.525   2000.0
     q = 1.35759 AU                   Incl. =   6.068
       a =  3.71766 AU     n = 0.137499     P =   7.17 years
(IAUC 9105)
Discovery- C/2010 A3 (HILL): 17m3
Elements:
     T = 2010 Mar. 27.292 TT          Peri. =  38.455
                                      Node  =  63.847   2000.0
     q = 1.65798 AU                   Incl. =  15.064
(IAUC 9106)
2010-1-1 permanent numbers:
  P/2009 S1 = P/2001 Q10: 229P.
  2009 X1 (LINEAR-NEAT) = 231P.
(IAUC 9101)
Discovery- P/2009 Y2 (KOWALSKI):18m9
Elements:
     T = 2010 Mar. 30.696 TT          Peri. = 171.805
     e = 0.62349                      Node  = 262.256   2000.0
     q = 2.33726 AU                   Incl. =  29.864
       a =  6.20772 AU     n = 0.063724     P =  15.47 years
(IAUC 9103)
2009-12-20 Discovery - C/2009 Y1 (CATALINA): 19m4
Elements:
     T = 2011 Jan. 25.403 TT          Peri. = 128.725
                                      Node  = 160.385   2000.0
     q = 2.44938 AU                   Incl. = 107.503
(CBET 2084)
2009-12-17 Identity (supposed): P/2009 W1 = 1999 XO188 (HILL)
(CBET 2083)
2009-12-13 Identity: P/2009 U6 = 1997 A2 = 2002 Q15 (LINEAR): 18m0.
The comet belongs to teh Jupiter family. During a close approach to Jupiter (0.9 A.U.) in September 2007 it's orbital period shortened.
(CBET 2072)