C/1927 E1 (Stearns)
| Parameter |
Value |
| Designation |
C/1927 E1 (Stearns) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1927-03-22T09:38:59.971200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:02Z |
| Obs used |
17 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1927-04-28.0000000 |
| e |
1.00126512 |
| q (au) |
3.685079 |
| a (au) |
-2912.831167 |
| i (deg) |
87.689543 |
| Ω (om, deg) |
215.661674 |
| ω (w, deg) |
11.068406 |
| M (ma, deg) |
0.000229 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.109 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.109 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| δ90 |
9.945 |
| 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) |
| 2026-02-03 00:00 |
01:56:23.72 |
+21:54:05.5 |
HIP 8876 |
28.78 |
| 2026-02-03 12:00 |
01:56:23.95 |
+21:54:03.7 |
HIP 8876 |
28.83 |
| 2026-02-04 00:00 |
01:56:24.20 |
+21:54:01.9 |
HIP 8876 |
28.89 |
| 2026-02-04 12:00 |
01:56:24.45 |
+21:54:00.2 |
HIP 8876 |
28.94 |
| 2026-02-05 00:00 |
01:56:24.71 |
+21:53:58.6 |
HIP 8876 |
29.00 |
| 2026-02-05 12:00 |
01:56:24.98 |
+21:53:57.0 |
HIP 8876 |
29.07 |
| 2026-02-06 00:00 |
01:56:25.25 |
+21:53:55.4 |
HIP 8876 |
29.13 |
| 2026-02-06 12:00 |
01:56:25.54 |
+21:53:53.9 |
HIP 8876 |
29.19 |
| 2026-02-07 00:00 |
01:56:25.83 |
+21:53:52.4 |
HIP 8876 |
29.26 |
| 2026-02-07 12:00 |
01:56:26.13 |
+21:53:51.0 |
HIP 8876 |
29.33 |
| 2026-02-08 00:00 |
01:56:26.45 |
+21:53:49.7 |
HIP 8876 |
29.40 |
| 2026-02-08 12:00 |
01:56:26.77 |
+21:53:48.4 |
HIP 8876 |
29.48 |
| 2026-02-09 00:00 |
01:56:27.09 |
+21:53:47.1 |
HIP 8876 |
29.55 |
| 2026-02-09 12:00 |
01:56:27.43 |
+21:53:45.9 |
HIP 8876 |
29.63 |
| 2026-02-10 00:00 |
01:56:27.78 |
+21:53:44.8 |
HIP 8876 |
29.71 |
| 2026-02-10 12:00 |
01:56:28.13 |
+21:53:43.7 |
HIP 8876 |
29.79 |
| 2026-02-11 00:00 |
01:56:28.49 |
+21:53:42.6 |
HIP 8876 |
29.88 |
| 2026-02-11 12:00 |
01:56:28.86 |
+21:53:41.6 |
HIP 8876 |
29.96 |
| 2026-02-12 00:00 |
01:56:29.24 |
+21:53:40.7 |
HIP 8876 |
30.05 |
| 2026-02-12 12:00 |
01:56:29.63 |
+21:53:39.8 |
HIP 8876 |
30.14 |
| 2026-02-13 00:00 |
01:56:30.03 |
+21:53:38.9 |
HIP 8876 |
30.23 |
| 2026-02-13 12:00 |
01:56:30.43 |
+21:53:38.1 |
HIP 8876 |
30.33 |
| 2026-02-14 00:00 |
01:56:30.84 |
+21:53:37.4 |
HIP 8876 |
30.42 |
| 2026-02-14 12:00 |
01:56:31.27 |
+21:53:36.7 |
HIP 8876 |
30.52 |
| 2026-02-15 00:00 |
01:56:31.69 |
+21:53:36.1 |
HIP 8876 |
30.62 |
| 2026-02-15 12:00 |
01:56:32.13 |
+21:53:35.5 |
HIP 8876 |
30.72 |
| 2026-02-16 00:00 |
01:56:32.58 |
+21:53:35.0 |
HIP 8876 |
30.82 |
| 2026-02-16 12:00 |
01:56:33.03 |
+21:53:34.5 |
HIP 8876 |
30.93 |
| 2026-02-17 00:00 |
01:56:33.49 |
+21:53:34.0 |
HIP 8876 |
31.04 |
| 2026-02-17 12:00 |
01:56:33.96 |
+21:53:33.7 |
HIP 8876 |
31.15 |
| 2026-02-18 00:00 |
01:56:34.44 |
+21:53:33.3 |
HIP 8876 |
31.26 |
| 2026-02-18 12:00 |
01:56:34.93 |
+21:53:33.1 |
HIP 8876 |
31.37 |
| 2026-02-19 00:00 |
01:56:35.42 |
+21:53:32.8 |
HIP 8876 |
31.48 |
| 2026-02-19 12:00 |
01:56:35.92 |
+21:53:32.7 |
HIP 8876 |
31.60 |
| 2026-02-20 00:00 |
01:56:36.43 |
+21:53:32.5 |
HIP 8876 |
31.72 |
| 2026-02-20 12:00 |
01:56:36.95 |
+21:53:32.5 |
HIP 8876 |
31.84 |
| 2026-02-21 00:00 |
01:56:37.47 |
+21:53:32.5 |
HIP 8876 |
31.96 |
| 2026-02-21 12:00 |
01:56:38.00 |
+21:53:32.5 |
HIP 8876 |
32.08 |
| 2026-02-22 00:00 |
01:56:38.54 |
+21:53:32.6 |
HIP 8876 |
32.21 |
| 2026-02-22 12:00 |
01:56:39.09 |
+21:53:32.7 |
HIP 8876 |
32.33 |
| 2026-02-23 00:00 |
01:56:39.65 |
+21:53:32.9 |
HIP 8876 |
32.46 |
| 2026-02-23 12:00 |
01:56:40.21 |
+21:53:33.1 |
HIP 8876 |
32.59 |
| 2026-02-24 00:00 |
01:56:40.78 |
+21:53:33.4 |
HIP 8876 |
32.73 |