| 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) |
| 2026-05-12 00:00 |
09:47:17.06 |
+65:34:44.2 |
HIP 47929 |
8.20 |
| 2026-05-12 12:00 |
09:47:16.34 |
+65:34:09.8 |
HIP 47929 |
8.35 |
| 2026-05-13 00:00 |
09:47:15.68 |
+65:33:35.4 |
HIP 47929 |
8.55 |
| 2026-05-13 12:00 |
09:47:15.07 |
+65:33:00.9 |
HIP 47929 |
8.78 |
| 2026-05-14 00:00 |
09:47:14.52 |
+65:32:26.3 |
HIP 47929 |
9.05 |
| 2026-05-14 12:00 |
09:47:14.02 |
+65:31:51.6 |
HIP 47929 |
9.36 |
| 2026-05-15 00:00 |
09:47:13.59 |
+65:31:16.9 |
HIP 47929 |
9.69 |
| 2026-05-15 12:00 |
09:47:13.20 |
+65:30:42.1 |
HIP 47929 |
10.05 |
| 2026-05-16 00:00 |
09:47:12.88 |
+65:30:07.2 |
HIP 47929 |
10.44 |
| 2026-05-16 12:00 |
09:47:12.61 |
+65:29:32.3 |
HIP 47929 |
10.85 |
| 2026-05-17 00:00 |
09:47:12.40 |
+65:28:57.3 |
HIP 47929 |
11.28 |
| 2026-05-17 12:00 |
09:47:12.24 |
+65:28:22.2 |
HIP 47929 |
11.72 |
| 2026-05-18 00:00 |
09:47:12.14 |
+65:27:47.1 |
HIP 47929 |
12.19 |
| 2026-05-18 12:00 |
09:47:12.10 |
+65:27:12.0 |
HIP 47929 |
12.66 |
| 2026-05-19 00:00 |
09:47:12.11 |
+65:26:36.8 |
HIP 47929 |
13.15 |
| 2026-05-19 12:00 |
09:47:12.18 |
+65:26:01.5 |
HIP 47929 |
13.65 |
| 2026-05-20 00:00 |
09:47:12.30 |
+65:25:26.2 |
HIP 47929 |
14.16 |
| 2026-05-20 12:00 |
09:47:12.48 |
+65:24:50.9 |
HIP 47929 |
14.68 |
| 2026-05-21 00:00 |
09:47:12.71 |
+65:24:15.5 |
HIP 47929 |
15.21 |
| 2026-05-21 12:00 |
09:47:13.00 |
+65:23:40.1 |
HIP 47929 |
15.75 |
| 2026-05-22 00:00 |
09:47:13.34 |
+65:23:04.7 |
HIP 47929 |
16.29 |
| 2026-05-22 12:00 |
09:47:13.74 |
+65:22:29.2 |
HIP 48209 |
16.17 |
| 2026-05-23 00:00 |
09:47:14.19 |
+65:21:53.7 |
HIP 48209 |
15.98 |
| 2026-05-23 12:00 |
09:47:14.70 |
+65:21:18.2 |
HIP 48209 |
15.81 |
| 2026-05-24 00:00 |
09:47:15.26 |
+65:20:42.6 |
HIP 48209 |
15.65 |
| 2026-05-24 12:00 |
09:47:15.87 |
+65:20:07.1 |
HIP 48209 |
15.51 |
| 2026-05-25 00:00 |
09:47:16.54 |
+65:19:31.5 |
HIP 48209 |
15.38 |
| 2026-05-25 12:00 |
09:47:17.26 |
+65:18:55.9 |
HIP 48209 |
15.28 |
| 2026-05-26 00:00 |
09:47:18.04 |
+65:18:20.3 |
HIP 48209 |
15.18 |
| 2026-05-26 12:00 |
09:47:18.86 |
+65:17:44.6 |
HIP 48209 |
15.11 |
| 2026-05-27 00:00 |
09:47:19.74 |
+65:17:09.0 |
HIP 48209 |
15.05 |
| 2026-05-27 12:00 |
09:47:20.68 |
+65:16:33.3 |
HIP 48209 |
15.02 |
| 2026-05-28 00:00 |
09:47:21.66 |
+65:15:57.7 |
HIP 48209 |
15.00 |
| 2026-05-28 12:00 |
09:47:22.70 |
+65:15:22.0 |
HIP 48209 |
15.00 |
| 2026-05-29 00:00 |
09:47:23.79 |
+65:14:46.4 |
HIP 48209 |
15.02 |
| 2026-05-29 12:00 |
09:47:24.93 |
+65:14:10.8 |
HIP 48209 |
15.05 |
| 2026-05-30 00:00 |
09:47:26.12 |
+65:13:35.1 |
HIP 48209 |
15.11 |
| 2026-05-30 12:00 |
09:47:27.37 |
+65:12:59.5 |
HIP 48209 |
15.19 |
| 2026-05-31 00:00 |
09:47:28.66 |
+65:12:23.8 |
HIP 48209 |
15.28 |
| 2026-05-31 12:00 |
09:47:30.01 |
+65:11:48.2 |
HIP 48209 |
15.39 |
| 2026-06-01 00:00 |
09:47:31.41 |
+65:11:12.6 |
HIP 48209 |
15.53 |
| 2026-06-01 12:00 |
09:47:32.86 |
+65:10:37.0 |
HIP 48209 |
15.67 |
| 2026-06-02 00:00 |
09:47:34.36 |
+65:10:01.4 |
HIP 48209 |
15.84 |