| Parameter |
Value |
| Designation |
C/2011 K1 (Schwartz-Holvorcem) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-04-21T22:15:47.076480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:50Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-06-03.0000000 |
| e |
1.00702797 |
| q (au) |
3.376629 |
| a (au) |
-480.455780 |
| i (deg) |
122.624865 |
| Ω (om, deg) |
70.737393 |
| ω (w, deg) |
167.097081 |
| M (ma, deg) |
0.003938 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.629 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.629 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.980 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
06:41:30.46 |
-17:40:28.9 |
HIP 32039 |
8.51 |
| 2026-05-12 12:00 |
06:41:32.79 |
-17:40:00.4 |
HIP 32039 |
7.99 |
| 2026-05-13 00:00 |
06:41:35.15 |
-17:39:32.0 |
HIP 32039 |
7.52 |
| 2026-05-13 12:00 |
06:41:37.52 |
-17:39:03.9 |
HIP 32039 |
7.10 |
| 2026-05-14 00:00 |
06:41:39.93 |
-17:38:36.0 |
HIP 32039 |
6.73 |
| 2026-05-14 12:00 |
06:41:42.35 |
-17:38:08.4 |
HIP 32039 |
6.44 |
| 2026-05-15 00:00 |
06:41:44.80 |
-17:37:41.0 |
HIP 32039 |
6.23 |
| 2026-05-15 12:00 |
06:41:47.27 |
-17:37:13.9 |
HIP 32039 |
6.10 |
| 2026-05-16 00:00 |
06:41:49.76 |
-17:36:47.0 |
HIP 32039 |
6.07 |
| 2026-05-16 12:00 |
06:41:52.27 |
-17:36:20.3 |
HIP 32039 |
6.14 |
| 2026-05-17 00:00 |
06:41:54.81 |
-17:35:53.9 |
HIP 32039 |
6.30 |
| 2026-05-17 12:00 |
06:41:57.36 |
-17:35:27.7 |
HIP 32039 |
6.55 |
| 2026-05-18 00:00 |
06:41:59.94 |
-17:35:01.8 |
HIP 32039 |
6.88 |
| 2026-05-18 12:00 |
06:42:02.54 |
-17:34:36.1 |
HIP 32039 |
7.28 |
| 2026-05-19 00:00 |
06:42:05.16 |
-17:34:10.7 |
HIP 32039 |
7.74 |
| 2026-05-19 12:00 |
06:42:07.80 |
-17:33:45.6 |
HIP 32039 |
8.25 |
| 2026-05-20 00:00 |
06:42:10.46 |
-17:33:20.7 |
HIP 32039 |
8.79 |
| 2026-05-20 12:00 |
06:42:13.13 |
-17:32:56.0 |
HIP 32039 |
9.38 |
| 2026-05-21 00:00 |
06:42:15.83 |
-17:32:31.6 |
HIP 32039 |
9.99 |
| 2026-05-21 12:00 |
06:42:18.55 |
-17:32:07.5 |
HIP 32039 |
10.62 |
| 2026-05-22 00:00 |
06:42:21.29 |
-17:31:43.6 |
HIP 32039 |
11.28 |
| 2026-05-22 12:00 |
06:42:24.05 |
-17:31:20.0 |
HIP 32039 |
11.95 |
| 2026-05-23 00:00 |
06:42:26.82 |
-17:30:56.6 |
HIP 32039 |
12.64 |
| 2026-05-23 12:00 |
06:42:29.62 |
-17:30:33.5 |
HIP 32039 |
13.34 |
| 2026-05-24 00:00 |
06:42:32.43 |
-17:30:10.7 |
HIP 32039 |
14.05 |
| 2026-05-24 12:00 |
06:42:35.26 |
-17:29:48.1 |
HIP 32039 |
14.78 |
| 2026-05-25 00:00 |
06:42:38.11 |
-17:29:25.8 |
HIP 32039 |
15.51 |
| 2026-05-25 12:00 |
06:42:40.98 |
-17:29:03.8 |
HIP 32039 |
16.24 |
| 2026-05-26 00:00 |
06:42:43.86 |
-17:28:42.0 |
HIP 32039 |
16.99 |
| 2026-05-26 12:00 |
06:42:46.76 |
-17:28:20.5 |
HIP 32039 |
17.74 |
| 2026-05-27 00:00 |
06:42:49.68 |
-17:27:59.3 |
HIP 32039 |
18.49 |
| 2026-05-27 12:00 |
06:42:52.61 |
-17:27:38.3 |
HIP 32039 |
19.25 |
| 2026-05-28 00:00 |
06:42:55.57 |
-17:27:17.6 |
HIP 32039 |
20.02 |
| 2026-05-28 12:00 |
06:42:58.53 |
-17:26:57.1 |
HIP 32039 |
20.79 |
| 2026-05-29 00:00 |
06:43:01.52 |
-17:26:37.0 |
HIP 32039 |
21.56 |
| 2026-05-29 12:00 |
06:43:04.52 |
-17:26:17.1 |
HIP 32039 |
22.34 |
| 2026-05-30 00:00 |
06:43:07.53 |
-17:25:57.5 |
HIP 32039 |
23.11 |
| 2026-05-30 12:00 |
06:43:10.56 |
-17:25:38.1 |
HIP 32039 |
23.90 |
| 2026-05-31 00:00 |
06:43:13.61 |
-17:25:19.0 |
HIP 32039 |
24.68 |
| 2026-05-31 12:00 |
06:43:16.67 |
-17:25:00.2 |
HIP 32039 |
25.47 |
| 2026-06-01 00:00 |
06:43:19.75 |
-17:24:41.7 |
HIP 32039 |
26.26 |
| 2026-06-01 12:00 |
06:43:22.84 |
-17:24:23.4 |
HIP 32039 |
27.05 |
| 2026-06-02 00:00 |
06:43:25.94 |
-17:24:05.4 |
HIP 32039 |
27.85 |