| Parameter |
Value |
| Designation |
C/2001 N2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-08-19T15:57:25.813440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:10Z |
| Obs used |
884 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-03-18.0000000 |
| e |
1.00105829 |
| q (au) |
2.668513 |
| a (au) |
-2521.533796 |
| i (deg) |
138.543532 |
| Ω (om, deg) |
52.803642 |
| ω (w, deg) |
151.896075 |
| M (ma, deg) |
-0.001204 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.423 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.423 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
10.000 |
| 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 |
| 2001-07-11 |
2002-03-19 |
+6.0608 |
-3.799 |
| 2002-03-19 |
2002-08-17 |
-14.8317 |
+6.318 |
| 2002-08-19 |
2003-06-08 |
+6.3253 |
-2.392 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:36:16.39 |
-09:46:19.0 |
HIP 31571 |
4.39 |
| 2026-06-01 12:00 |
06:36:18.60 |
-09:46:09.7 |
HIP 31571 |
4.20 |
| 2026-06-02 00:00 |
06:36:20.81 |
-09:46:00.6 |
HIP 31571 |
4.07 |
| 2026-06-02 12:00 |
06:36:23.04 |
-09:45:51.6 |
HIP 31571 |
4.02 |
| 2026-06-03 00:00 |
06:36:25.28 |
-09:45:42.8 |
HIP 31571 |
4.04 |
| 2026-06-03 12:00 |
06:36:27.53 |
-09:45:34.2 |
HIP 31571 |
4.15 |
| 2026-06-04 00:00 |
06:36:29.78 |
-09:45:25.8 |
HIP 31571 |
4.32 |
| 2026-06-04 12:00 |
06:36:32.05 |
-09:45:17.5 |
HIP 31571 |
4.55 |
| 2026-06-05 00:00 |
06:36:34.32 |
-09:45:09.4 |
HIP 31571 |
4.85 |
| 2026-06-05 12:00 |
06:36:36.60 |
-09:45:01.4 |
HIP 31571 |
5.18 |
| 2026-06-06 00:00 |
06:36:38.89 |
-09:44:53.7 |
HIP 31571 |
5.56 |
| 2026-06-06 12:00 |
06:36:41.19 |
-09:44:46.1 |
HIP 31571 |
5.97 |
| 2026-06-07 00:00 |
06:36:43.50 |
-09:44:38.7 |
HIP 31571 |
6.40 |
| 2026-06-07 12:00 |
06:36:45.82 |
-09:44:31.4 |
HIP 31571 |
6.86 |
| 2026-06-08 00:00 |
06:36:48.14 |
-09:44:24.4 |
HIP 31571 |
7.33 |
| 2026-06-08 12:00 |
06:36:50.47 |
-09:44:17.5 |
HIP 31571 |
7.81 |
| 2026-06-09 00:00 |
06:36:52.81 |
-09:44:10.7 |
HIP 31571 |
8.31 |
| 2026-06-09 12:00 |
06:36:55.16 |
-09:44:04.2 |
HIP 31571 |
8.82 |
| 2026-06-10 00:00 |
06:36:57.51 |
-09:43:57.8 |
HIP 31571 |
9.34 |
| 2026-06-10 12:00 |
06:36:59.88 |
-09:43:51.6 |
HIP 31571 |
9.87 |
| 2026-06-11 00:00 |
06:37:02.24 |
-09:43:45.6 |
HIP 31571 |
10.40 |
| 2026-06-11 12:00 |
06:37:04.62 |
-09:43:39.7 |
HIP 31571 |
10.94 |
| 2026-06-12 00:00 |
06:37:07.00 |
-09:43:34.1 |
HIP 31571 |
11.48 |
| 2026-06-12 12:00 |
06:37:09.39 |
-09:43:28.6 |
HIP 31571 |
12.03 |
| 2026-06-13 00:00 |
06:37:11.78 |
-09:43:23.2 |
HIP 31571 |
12.58 |
| 2026-06-13 12:00 |
06:37:14.19 |
-09:43:18.1 |
HIP 31571 |
13.14 |
| 2026-06-14 00:00 |
06:37:16.59 |
-09:43:13.1 |
HIP 31571 |
13.70 |
| 2026-06-14 12:00 |
06:37:19.00 |
-09:43:08.4 |
HIP 31571 |
14.26 |
| 2026-06-15 00:00 |
06:37:21.42 |
-09:43:03.8 |
HIP 31571 |
14.83 |
| 2026-06-15 12:00 |
06:37:23.85 |
-09:42:59.3 |
HIP 31571 |
15.39 |
| 2026-06-16 00:00 |
06:37:26.27 |
-09:42:55.1 |
HIP 31571 |
15.96 |
| 2026-06-16 12:00 |
06:37:28.71 |
-09:42:51.0 |
HIP 31571 |
16.54 |
| 2026-06-17 00:00 |
06:37:31.15 |
-09:42:47.1 |
HIP 31571 |
17.11 |
| 2026-06-17 12:00 |
06:37:33.59 |
-09:42:43.4 |
HIP 31571 |
17.69 |
| 2026-06-18 00:00 |
06:37:36.04 |
-09:42:39.9 |
HIP 31571 |
18.27 |
| 2026-06-18 12:00 |
06:37:38.49 |
-09:42:36.5 |
HIP 31571 |
18.84 |
| 2026-06-19 00:00 |
06:37:40.94 |
-09:42:33.4 |
HIP 31571 |
19.43 |
| 2026-06-19 12:00 |
06:37:43.40 |
-09:42:30.4 |
HIP 31571 |
20.01 |
| 2026-06-20 00:00 |
06:37:45.87 |
-09:42:27.5 |
HIP 31571 |
20.59 |
| 2026-06-20 12:00 |
06:37:48.33 |
-09:42:24.9 |
HIP 31571 |
21.18 |
| 2026-06-21 00:00 |
06:37:50.80 |
-09:42:22.5 |
HIP 31571 |
21.76 |
| 2026-06-21 12:00 |
06:37:53.28 |
-09:42:20.2 |
HIP 31571 |
22.35 |
| 2026-06-22 00:00 |
06:37:55.75 |
-09:42:18.1 |
HIP 31571 |
22.94 |