This is an interesting example of some possible confusion over the use of the terms asteroid and comet, in regards to what is generally considered the best meteor shower- the Quadrantids. It has a comet-like orbit at perihelion, with an asteroid-like aphelion (which is why it was first designated a possible asteroid by LONEOS).
It takes a minute to download the PDF article, but it's worth reading-
2003 EH 1 IS THE QUADRANTID SHOWER PARENT COMET, Peter Jenniskens, Ph.D.Also-
A/2003 EH1 (LONEOS) is an Amor type asteroid, and was 19th magnitude when discovered by LONEOS on 2003 March 6.11.
The initial orbit on MPEC 2003-E27 [2003 March 7] was not particularly unusual, apart from a high inclination, however further observations have given a higher eccentricity. Peter Jenniskens has noted a close similarity to the orbit of the Quadrantid meteors. It is worth further study to see if it shows any cometary activity. The orbit is typical of a Jupiter family comet and it can approach within 0.3 AU AU of Jupiter and the Earth. The object is in a 5.53 year orbit, with perihelion at 1.19 AU and an eccentricity of 0.62. It was at perihelion in late February and will fade.
P. Jenniskens, NASA Ames Research Center, has pointed out that 2003 EH_1 (cf. MPEC 2003-E27) would seem to be a very strong candidate for the parent of the Quadrantid meteor stream. The later orbits, from arcs of up to 48 days (MPO 48330), indicate that frequent approaches within 0.2-0.3 AU of Jupiter occur, those during the past century or two evidently increasing q from just under 1 AU (with other orbital elements also very similar to those of the Quadrantids) to the present 1.19 AU. The current theoretical radiant for 2003 EH_1 (R.A. = 229.9 deg, Decl. = +49.6 deg; V_inf = 41.7 km/s at solar longitude 282.94 deg, equinox 2000.0) is at the center of the Quadrantid radiants measured by photographic means, the narrow dispersion implying a young (about 500 years) shower age.
From that dispersion, Jenniskens et al. (1997, Astron. Astrophys. 327, 1242) suspected that the parent was still among the meteoroids, hiding as a minor planet. On computing a parabolic orbit for C/1490 Y1, Hasegawa (1979, Publ. Astron. Soc. Japan 31, 257) introduced that comet as the likely Quadrantid parent. In attempting to link the 2003 observations to those of 1490-1491, Jenniskens, and also B. G. Marsden (Center for Astrophysics), have found that most of the potential solutions with the required Jan. 1491 perihelion date yield 0.5 < q < 0.6 AU in 1491, and this is probably too small to fit the data used by Hasegawa.
Values in the more acceptable range of 0.7 < q < 0.8 AU (and 0.80 > e > 0.75) certainly arise for 1488 < T < 1494, however, the desired date being clearly attainable with the help also of a close approach to the earth or -- more likely -- the presence of nongravitational forces. Further light could be shed on the problem by the recognition of precovery and/or recovery observations of 2003 EH_1, which is presumably a comet and that should in any case be considered a high-priority object for further study. [IAUC 8252, 2003 December 8]
Additional observations of the object were made at the end of December 2003 and early January 2004 from ESO, La Silla and these, together with a revised orbit appeared on MPEC 2004-N22 [2004 July 5]. Brian Marsden notes-
This is the presumed parent of the Quadrantid meteors (cf. IAUC 8252). The recovery observations are still insufficient to shed much light on the suggested identity with comet C/1490 Y1.
It is currently a southern hemisphere object and approaching aphelion, so a difficult object to observe at 24th magnitude.
Source-
New Comets Discovered in 2003 (Updated June 3, 2005)