| Parameter |
Value |
| Designation |
C/2013 J5 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-11-30T00:52:09.624000Z |
| Orbit solution date (soln_date, UTC) |
2022-07-06T03:12:22Z |
| Obs used |
74 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-05-04.0000000 |
| e |
1.00247225 |
| q (au) |
4.905909 |
| a (au) |
-1984.387923 |
| i (deg) |
136.025000 |
| Ω (om, deg) |
256.785024 |
| ω (w, deg) |
19.174987 |
| M (ma, deg) |
0.001728 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.118 + 3.956\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.118 |
| n |
3.956 |
| gf |
0.991 |
| gb |
-0.797 |
| k |
1.000 |
| δ90 |
9.999 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
06:40:24.64 |
+44:01:38.5 |
HIP 31889 |
4.88 |
| 2026-03-26 12:00 |
06:40:23.63 |
+44:01:11.4 |
HIP 31889 |
4.64 |
| 2026-03-27 00:00 |
06:40:22.67 |
+44:00:44.3 |
HIP 31889 |
4.46 |
| 2026-03-27 12:00 |
06:40:21.76 |
+44:00:17.2 |
HIP 31889 |
4.33 |
| 2026-03-28 00:00 |
06:40:20.90 |
+43:59:50.1 |
HIP 31889 |
4.26 |
| 2026-03-28 12:00 |
06:40:20.10 |
+43:59:22.9 |
HIP 31889 |
4.26 |
| 2026-03-29 00:00 |
06:40:19.35 |
+43:58:55.8 |
HIP 31889 |
4.31 |
| 2026-03-29 12:00 |
06:40:18.65 |
+43:58:28.6 |
HIP 31889 |
4.43 |
| 2026-03-30 00:00 |
06:40:18.00 |
+43:58:01.3 |
HIP 31889 |
4.59 |
| 2026-03-30 12:00 |
06:40:17.40 |
+43:57:34.1 |
HIP 31889 |
4.80 |
| 2026-03-31 00:00 |
06:40:16.85 |
+43:57:06.9 |
HIP 31889 |
5.06 |
| 2026-03-31 12:00 |
06:40:16.36 |
+43:56:39.6 |
HIP 31889 |
5.35 |
| 2026-04-01 00:00 |
06:40:15.92 |
+43:56:12.3 |
HIP 31889 |
5.66 |
| 2026-04-01 12:00 |
06:40:15.53 |
+43:55:45.1 |
HIP 31889 |
6.00 |
| 2026-04-02 00:00 |
06:40:15.19 |
+43:55:17.8 |
HIP 31889 |
6.36 |
| 2026-04-02 12:00 |
06:40:14.90 |
+43:54:50.5 |
HIP 31889 |
6.74 |
| 2026-04-03 00:00 |
06:40:14.66 |
+43:54:23.2 |
HIP 31889 |
7.13 |
| 2026-04-03 12:00 |
06:40:14.47 |
+43:53:55.9 |
HIP 31889 |
7.53 |
| 2026-04-04 00:00 |
06:40:14.34 |
+43:53:28.6 |
HIP 31889 |
7.94 |
| 2026-04-04 12:00 |
06:40:14.25 |
+43:53:01.3 |
HIP 31889 |
8.36 |
| 2026-04-05 00:00 |
06:40:14.22 |
+43:52:34.0 |
HIP 31889 |
8.79 |
| 2026-04-05 12:00 |
06:40:14.23 |
+43:52:06.7 |
HIP 31889 |
9.22 |
| 2026-04-06 00:00 |
06:40:14.30 |
+43:51:39.4 |
HIP 31889 |
9.65 |
| 2026-04-06 12:00 |
06:40:14.41 |
+43:51:12.1 |
HIP 31889 |
10.09 |
| 2026-04-07 00:00 |
06:40:14.58 |
+43:50:44.8 |
HIP 31889 |
10.54 |
| 2026-04-07 12:00 |
06:40:14.79 |
+43:50:17.5 |
HIP 31889 |
10.99 |
| 2026-04-08 00:00 |
06:40:15.06 |
+43:49:50.3 |
HIP 31889 |
11.44 |
| 2026-04-08 12:00 |
06:40:15.37 |
+43:49:23.0 |
HIP 31889 |
11.89 |
| 2026-04-09 00:00 |
06:40:15.74 |
+43:48:55.8 |
HIP 31889 |
12.34 |
| 2026-04-09 12:00 |
06:40:16.15 |
+43:48:28.6 |
HIP 31889 |
12.80 |
| 2026-04-10 00:00 |
06:40:16.62 |
+43:48:01.4 |
HIP 31889 |
13.26 |
| 2026-04-10 12:00 |
06:40:17.13 |
+43:47:34.2 |
HIP 31889 |
13.72 |
| 2026-04-11 00:00 |
06:40:17.69 |
+43:47:07.0 |
HIP 31889 |
14.19 |
| 2026-04-11 12:00 |
06:40:18.30 |
+43:46:39.9 |
HIP 31889 |
14.65 |
| 2026-04-12 00:00 |
06:40:18.96 |
+43:46:12.8 |
HIP 31889 |
15.12 |
| 2026-04-12 12:00 |
06:40:19.67 |
+43:45:45.7 |
HIP 31889 |
15.59 |
| 2026-04-13 00:00 |
06:40:20.43 |
+43:45:18.6 |
HIP 31889 |
16.06 |
| 2026-04-13 12:00 |
06:40:21.23 |
+43:44:51.6 |
HIP 31889 |
16.53 |
| 2026-04-14 00:00 |
06:40:22.08 |
+43:44:24.6 |
HIP 31889 |
17.01 |
| 2026-04-14 12:00 |
06:40:22.98 |
+43:43:57.6 |
HIP 31889 |
17.48 |
| 2026-04-15 00:00 |
06:40:23.93 |
+43:43:30.7 |
HIP 31889 |
17.96 |
| 2026-04-15 12:00 |
06:40:24.93 |
+43:43:03.8 |
HIP 31889 |
18.44 |
| 2026-04-16 00:00 |
06:40:25.97 |
+43:42:36.9 |
HIP 31889 |
18.92 |