| 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 |
+23.6892 |
-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) |
| 2026-09-20 00:00 |
10:04:44.89 |
+64:00:41.2 |
HIP 49291 |
9.10 |
| 2026-09-20 12:00 |
10:04:49.96 |
+64:00:49.0 |
HIP 49291 |
9.46 |
| 2026-09-21 00:00 |
10:04:55.01 |
+64:00:57.2 |
HIP 49291 |
9.84 |
| 2026-09-21 12:00 |
10:05:00.03 |
+64:01:05.6 |
HIP 49291 |
10.23 |
| 2026-09-22 00:00 |
10:05:05.02 |
+64:01:14.3 |
HIP 49291 |
10.63 |
| 2026-09-22 12:00 |
10:05:10.00 |
+64:01:23.2 |
HIP 49291 |
11.05 |
| 2026-09-23 00:00 |
10:05:14.95 |
+64:01:32.5 |
HIP 49291 |
11.47 |
| 2026-09-23 12:00 |
10:05:19.87 |
+64:01:42.0 |
HIP 49291 |
11.89 |
| 2026-09-24 00:00 |
10:05:24.77 |
+64:01:51.8 |
HIP 49291 |
12.33 |
| 2026-09-24 12:00 |
10:05:29.64 |
+64:02:01.9 |
HIP 49291 |
12.77 |
| 2026-09-25 00:00 |
10:05:34.49 |
+64:02:12.3 |
HIP 49291 |
13.21 |
| 2026-09-25 12:00 |
10:05:39.31 |
+64:02:22.9 |
HIP 49291 |
13.66 |
| 2026-09-26 00:00 |
10:05:44.10 |
+64:02:33.8 |
HIP 49291 |
14.11 |
| 2026-09-26 12:00 |
10:05:48.87 |
+64:02:45.0 |
HIP 49291 |
14.57 |
| 2026-09-27 00:00 |
10:05:53.60 |
+64:02:56.5 |
HIP 49291 |
15.02 |
| 2026-09-27 12:00 |
10:05:58.32 |
+64:03:08.2 |
HIP 49291 |
15.48 |
| 2026-09-28 00:00 |
10:06:03.00 |
+64:03:20.3 |
HIP 49291 |
15.94 |
| 2026-09-28 12:00 |
10:06:07.65 |
+64:03:32.6 |
HIP 49291 |
16.41 |
| 2026-09-29 00:00 |
10:06:12.28 |
+64:03:45.2 |
HIP 49291 |
16.87 |
| 2026-09-29 12:00 |
10:06:16.88 |
+64:03:58.0 |
HIP 49291 |
17.34 |
| 2026-09-30 00:00 |
10:06:21.45 |
+64:04:11.1 |
HIP 49291 |
17.80 |
| 2026-09-30 12:00 |
10:06:25.99 |
+64:04:24.5 |
HIP 49291 |
18.27 |
| 2026-10-01 00:00 |
10:06:30.50 |
+64:04:38.2 |
HIP 49291 |
18.74 |
| 2026-10-01 12:00 |
10:06:34.98 |
+64:04:52.1 |
HIP 49724 |
18.42 |
| 2026-10-02 00:00 |
10:06:39.42 |
+64:05:06.4 |
HIP 49724 |
18.08 |
| 2026-10-02 12:00 |
10:06:43.84 |
+64:05:20.8 |
HIP 49724 |
17.76 |
| 2026-10-03 00:00 |
10:06:48.23 |
+64:05:35.6 |
HIP 49724 |
17.45 |
| 2026-10-03 12:00 |
10:06:52.58 |
+64:05:50.6 |
HIP 49724 |
17.16 |
| 2026-10-04 00:00 |
10:06:56.91 |
+64:06:05.9 |
HIP 49724 |
16.88 |
| 2026-10-04 12:00 |
10:07:01.20 |
+64:06:21.5 |
HIP 49724 |
16.63 |
| 2026-10-05 00:00 |
10:07:05.45 |
+64:06:37.3 |
HIP 49724 |
16.39 |
| 2026-10-05 12:00 |
10:07:09.68 |
+64:06:53.5 |
HIP 49724 |
16.18 |
| 2026-10-06 00:00 |
10:07:13.87 |
+64:07:09.8 |
HIP 49724 |
15.98 |
| 2026-10-06 12:00 |
10:07:18.03 |
+64:07:26.5 |
HIP 49724 |
15.81 |
| 2026-10-07 00:00 |
10:07:22.15 |
+64:07:43.4 |
HIP 49724 |
15.66 |
| 2026-10-07 12:00 |
10:07:26.24 |
+64:08:00.5 |
HIP 49724 |
15.53 |
| 2026-10-08 00:00 |
10:07:30.29 |
+64:08:18.0 |
HIP 49724 |
15.42 |
| 2026-10-08 12:00 |
10:07:34.31 |
+64:08:35.7 |
HIP 49724 |
15.34 |
| 2026-10-09 00:00 |
10:07:38.29 |
+64:08:53.7 |
HIP 49724 |
15.28 |
| 2026-10-09 12:00 |
10:07:42.24 |
+64:09:11.9 |
HIP 49724 |
15.25 |
| 2026-10-10 00:00 |
10:07:46.15 |
+64:09:30.4 |
HIP 49724 |
15.24 |
| 2026-10-10 12:00 |
10:07:50.02 |
+64:09:49.1 |
HIP 49724 |
15.25 |
| 2026-10-11 00:00 |
10:07:53.86 |
+64:10:08.1 |
HIP 49724 |
15.29 |