C/2004 B1 (LINEAR)
| Parameter |
Value |
| Designation |
C/2004 B1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-02-07T21:19:48.656640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:36Z |
| Obs used |
1832 |
| NEO |
- |
| M1 |
12.300 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-04-08.0000000 |
| e |
1.00130658 |
| q (au) |
1.601945 |
| a (au) |
-1226.056929 |
| i (deg) |
114.096847 |
| Ω (om, deg) |
272.801879 |
| ω (w, deg) |
327.900869 |
| M (ma, deg) |
0.001357 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.202 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.202 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.888 |
| k |
0.984 |
| δ90 |
9.997 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2004-01-28 |
2004-09-29 |
+13.6677 |
-11.312 |
| 2004-09-29 |
2005-01-16 |
-0.8818 |
-0.030 |
| 2005-01-16 |
2005-10-02 |
+2.3681 |
-2.742 |
| 2005-10-02 |
2005-12-24 |
-13.2191 |
+2.440 |
| 2006-03-13 |
2006-06-07 |
+23.6893 |
-8.038 |
| 2006-06-07 |
2006-08-02 |
-7.5231 |
+3.109 |
| 2006-08-02 |
2006-09-09 |
-16.0328 |
+7.184 |
| 2006-09-09 |
2008-08-24 |
+2.9106 |
-2.019 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
10:04:25.18 |
+66:15:22.2 |
HIP 49552 |
16.35 |
| 2026-02-03 12:00 |
10:04:18.02 |
+66:15:40.2 |
HIP 49552 |
17.00 |
| 2026-02-04 00:00 |
10:04:10.83 |
+66:15:57.8 |
HIP 49552 |
17.65 |
| 2026-02-04 12:00 |
10:04:03.63 |
+66:16:15.1 |
HIP 49552 |
18.32 |
| 2026-02-05 00:00 |
10:03:56.41 |
+66:16:32.1 |
HIP 49552 |
19.00 |
| 2026-02-05 12:00 |
10:03:49.18 |
+66:16:48.7 |
HIP 49552 |
19.69 |
| 2026-02-06 00:00 |
10:03:41.93 |
+66:17:05.1 |
HIP 49552 |
20.39 |
| 2026-02-06 12:00 |
10:03:34.67 |
+66:17:21.1 |
HIP 49552 |
21.09 |
| 2026-02-07 00:00 |
10:03:27.39 |
+66:17:36.8 |
HIP 49552 |
21.80 |
| 2026-02-07 12:00 |
10:03:20.10 |
+66:17:52.2 |
HIP 49552 |
22.52 |
| 2026-02-08 00:00 |
10:03:12.80 |
+66:18:07.2 |
HIP 49552 |
23.24 |
| 2026-02-08 12:00 |
10:03:05.48 |
+66:18:21.9 |
HIP 49552 |
23.96 |
| 2026-02-09 00:00 |
10:02:58.15 |
+66:18:36.3 |
HIP 49552 |
24.69 |
| 2026-02-09 12:00 |
10:02:50.82 |
+66:18:50.4 |
HIP 49552 |
25.43 |
| 2026-02-10 00:00 |
10:02:43.47 |
+66:19:04.1 |
HIP 49552 |
26.16 |
| 2026-02-10 12:00 |
10:02:36.11 |
+66:19:17.5 |
HIP 49552 |
26.90 |
| 2026-02-11 00:00 |
10:02:28.75 |
+66:19:30.6 |
HIP 49552 |
27.64 |
| 2026-02-11 12:00 |
10:02:21.38 |
+66:19:43.3 |
HIP 49552 |
28.39 |
| 2026-02-12 00:00 |
10:02:13.99 |
+66:19:55.7 |
HIP 49552 |
29.13 |
| 2026-02-12 12:00 |
10:02:06.61 |
+66:20:07.7 |
HIP 49552 |
29.88 |
| 2026-02-13 00:00 |
10:01:59.21 |
+66:20:19.4 |
HIP 49552 |
30.63 |
| 2026-02-13 12:00 |
10:01:51.82 |
+66:20:30.8 |
HIP 49552 |
31.38 |
| 2026-02-14 00:00 |
10:01:44.41 |
+66:20:41.8 |
HIP 49552 |
32.13 |
| 2026-02-14 12:00 |
10:01:37.00 |
+66:20:52.5 |
HIP 48889 |
32.34 |
| 2026-02-15 00:00 |
10:01:29.59 |
+66:21:02.8 |
HIP 48889 |
32.01 |
| 2026-02-15 12:00 |
10:01:22.18 |
+66:21:12.8 |
HIP 48889 |
31.70 |
| 2026-02-16 00:00 |
10:01:14.76 |
+66:21:22.5 |
HIP 48889 |
31.39 |
| 2026-02-16 12:00 |
10:01:07.34 |
+66:21:31.8 |
HIP 48889 |
31.10 |
| 2026-02-17 00:00 |
10:00:59.93 |
+66:21:40.8 |
HIP 48889 |
30.82 |
| 2026-02-17 12:00 |
10:00:52.51 |
+66:21:49.4 |
HIP 48889 |
30.55 |
| 2026-02-18 00:00 |
10:00:45.09 |
+66:21:57.7 |
HIP 48834 |
30.27 |
| 2026-02-18 12:00 |
10:00:37.68 |
+66:22:05.6 |
HIP 48834 |
29.72 |
| 2026-02-19 00:00 |
10:00:30.26 |
+66:22:13.1 |
HIP 48834 |
29.19 |
| 2026-02-19 12:00 |
10:00:22.85 |
+66:22:20.4 |
HIP 48834 |
28.68 |
| 2026-02-20 00:00 |
10:00:15.44 |
+66:22:27.2 |
HIP 48834 |
28.18 |
| 2026-02-20 12:00 |
10:00:08.04 |
+66:22:33.8 |
HIP 48834 |
27.69 |
| 2026-02-21 00:00 |
10:00:00.64 |
+66:22:39.9 |
HIP 48834 |
27.23 |
| 2026-02-21 12:00 |
09:59:53.25 |
+66:22:45.8 |
HIP 48834 |
26.78 |
| 2026-02-22 00:00 |
09:59:45.86 |
+66:22:51.2 |
HIP 48834 |
26.35 |
| 2026-02-22 12:00 |
09:59:38.48 |
+66:22:56.3 |
HIP 48834 |
25.94 |
| 2026-02-23 00:00 |
09:59:31.11 |
+66:23:01.1 |
HIP 48834 |
25.55 |
| 2026-02-23 12:00 |
09:59:23.74 |
+66:23:05.5 |
HIP 48834 |
25.18 |
| 2026-02-24 00:00 |
09:59:16.39 |
+66:23:09.6 |
HIP 48834 |
24.83 |