| Parameter |
Value |
| Designation |
C/2010 S1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-05-20T07:54:44.360640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:47Z |
| Obs used |
8511 |
| NEO |
- |
| M1 |
5.800 |
| K1 |
6.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-10-29.0000000 |
| e |
1.00124864 |
| q (au) |
5.899919 |
| a (au) |
-4725.086529 |
| i (deg) |
125.335283 |
| Ω (om, deg) |
93.432292 |
| ω (w, deg) |
118.617187 |
| M (ma, deg) |
-0.000617 |
Magnitude
Scatter + Global Linear
$$
M_a = (1.804 + 4.182\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
1.804 |
| n |
4.182 |
| gf |
1.000 |
| gb |
-0.503 |
| 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 |
| 2010-09-21 |
2011-08-06 |
+19.8672 |
-18.186 |
| 2011-08-06 |
2013-05-20 |
-7.0625 |
+5.448 |
| 2013-05-21 |
2014-07-27 |
+22.0489 |
-17.120 |
| 2014-07-27 |
2015-09-15 |
-9.4589 |
+8.899 |
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 |
13:03:59.51 |
-59:57:13.5 |
HIP 63678 |
7.85 |
| 2026-06-01 12:00 |
13:03:53.33 |
-59:56:20.5 |
HIP 63678 |
7.50 |
| 2026-06-02 00:00 |
13:03:47.22 |
-59:55:27.4 |
HIP 63678 |
7.34 |
| 2026-06-02 12:00 |
13:03:41.17 |
-59:54:34.1 |
HIP 63678 |
7.37 |
| 2026-06-03 00:00 |
13:03:35.19 |
-59:53:40.7 |
HIP 63678 |
7.58 |
| 2026-06-03 12:00 |
13:03:29.27 |
-59:52:47.1 |
HIP 63678 |
7.97 |
| 2026-06-04 00:00 |
13:03:23.42 |
-59:51:53.4 |
HIP 63678 |
8.51 |
| 2026-06-04 12:00 |
13:03:17.63 |
-59:50:59.5 |
HIP 63678 |
9.16 |
| 2026-06-05 00:00 |
13:03:11.90 |
-59:50:05.4 |
HIP 63678 |
9.91 |
| 2026-06-05 12:00 |
13:03:06.25 |
-59:49:11.3 |
HIP 63678 |
10.73 |
| 2026-06-06 00:00 |
13:03:00.65 |
-59:48:17.0 |
HIP 63678 |
11.62 |
| 2026-06-06 12:00 |
13:02:55.13 |
-59:47:22.6 |
HIP 63686 |
10.87 |
| 2026-06-07 00:00 |
13:02:49.67 |
-59:46:28.0 |
HIP 63686 |
10.07 |
| 2026-06-07 12:00 |
13:02:44.28 |
-59:45:33.3 |
HIP 63686 |
9.33 |
| 2026-06-08 00:00 |
13:02:38.95 |
-59:44:38.6 |
HIP 63686 |
8.68 |
| 2026-06-08 12:00 |
13:02:33.69 |
-59:43:43.7 |
HIP 63686 |
8.13 |
| 2026-06-09 00:00 |
13:02:28.50 |
-59:42:48.7 |
HIP 63686 |
7.70 |
| 2026-06-09 12:00 |
13:02:23.38 |
-59:41:53.6 |
HIP 63686 |
7.41 |
| 2026-06-10 00:00 |
13:02:18.32 |
-59:40:58.4 |
HIP 63686 |
7.28 |
| 2026-06-10 12:00 |
13:02:13.33 |
-59:40:03.1 |
HIP 63686 |
7.31 |
| 2026-06-11 00:00 |
13:02:08.41 |
-59:39:07.8 |
HIP 63686 |
7.50 |
| 2026-06-11 12:00 |
13:02:03.56 |
-59:38:12.3 |
HIP 63686 |
7.84 |
| 2026-06-12 00:00 |
13:01:58.78 |
-59:37:16.8 |
HIP 63686 |
8.30 |
| 2026-06-12 12:00 |
13:01:54.07 |
-59:36:21.2 |
HIP 63686 |
8.87 |
| 2026-06-13 00:00 |
13:01:49.42 |
-59:35:25.5 |
HIP 63686 |
9.53 |
| 2026-06-13 12:00 |
13:01:44.84 |
-59:34:29.8 |
HIP 63686 |
10.25 |
| 2026-06-14 00:00 |
13:01:40.34 |
-59:33:34.0 |
HIP 63686 |
11.03 |
| 2026-06-14 12:00 |
13:01:35.90 |
-59:32:38.2 |
HIP 63686 |
11.85 |
| 2026-06-15 00:00 |
13:01:31.53 |
-59:31:42.3 |
HIP 63686 |
12.70 |
| 2026-06-15 12:00 |
13:01:27.24 |
-59:30:46.4 |
HIP 63686 |
13.58 |
| 2026-06-16 00:00 |
13:01:23.01 |
-59:29:50.4 |
HIP 63686 |
14.48 |
| 2026-06-16 12:00 |
13:01:18.85 |
-59:28:54.4 |
HIP 63686 |
15.39 |
| 2026-06-17 00:00 |
13:01:14.76 |
-59:27:58.4 |
HIP 63686 |
16.31 |
| 2026-06-17 12:00 |
13:01:10.75 |
-59:27:02.4 |
HIP 63686 |
17.25 |
| 2026-06-18 00:00 |
13:01:06.80 |
-59:26:06.3 |
HIP 63686 |
18.19 |
| 2026-06-18 12:00 |
13:01:02.92 |
-59:25:10.2 |
HIP 63686 |
19.14 |
| 2026-06-19 00:00 |
13:00:59.12 |
-59:24:14.2 |
HIP 63686 |
20.09 |
| 2026-06-19 12:00 |
13:00:55.38 |
-59:23:18.1 |
HIP 63686 |
21.05 |
| 2026-06-20 00:00 |
13:00:51.72 |
-59:22:22.0 |
HIP 63686 |
22.01 |
| 2026-06-20 12:00 |
13:00:48.12 |
-59:21:25.9 |
HIP 63686 |
22.97 |
| 2026-06-21 00:00 |
13:00:44.60 |
-59:20:29.9 |
HIP 63475 |
23.65 |
| 2026-06-21 12:00 |
13:00:41.14 |
-59:19:33.8 |
HIP 63475 |
22.67 |
| 2026-06-22 00:00 |
13:00:37.76 |
-59:18:37.8 |
HIP 63475 |
21.71 |