| 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
$$
M_a = (8.108 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.108 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| 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) |
| 2026-06-01 00:00 |
01:59:35.90 |
+22:05:50.1 |
HIP 9260 |
13.41 |
| 2026-06-01 12:00 |
01:59:36.70 |
+22:05:55.3 |
HIP 9260 |
13.59 |
| 2026-06-02 00:00 |
01:59:37.50 |
+22:06:00.6 |
HIP 9260 |
13.77 |
| 2026-06-02 12:00 |
01:59:38.30 |
+22:06:05.8 |
HIP 9260 |
13.95 |
| 2026-06-03 00:00 |
01:59:39.08 |
+22:06:11.0 |
HIP 9260 |
14.12 |
| 2026-06-03 12:00 |
01:59:39.87 |
+22:06:16.2 |
HIP 9260 |
14.30 |
| 2026-06-04 00:00 |
01:59:40.64 |
+22:06:21.4 |
HIP 9260 |
14.48 |
| 2026-06-04 12:00 |
01:59:41.42 |
+22:06:26.6 |
HIP 9260 |
14.66 |
| 2026-06-05 00:00 |
01:59:42.18 |
+22:06:31.7 |
HIP 9260 |
14.84 |
| 2026-06-05 12:00 |
01:59:42.94 |
+22:06:36.9 |
HIP 9260 |
15.01 |
| 2026-06-06 00:00 |
01:59:43.70 |
+22:06:42.0 |
HIP 9260 |
15.19 |
| 2026-06-06 12:00 |
01:59:44.45 |
+22:06:47.2 |
HIP 9260 |
15.36 |
| 2026-06-07 00:00 |
01:59:45.19 |
+22:06:52.3 |
HIP 9260 |
15.54 |
| 2026-06-07 12:00 |
01:59:45.93 |
+22:06:57.4 |
HIP 9260 |
15.71 |
| 2026-06-08 00:00 |
01:59:46.66 |
+22:07:02.5 |
HIP 9260 |
15.89 |
| 2026-06-08 12:00 |
01:59:47.39 |
+22:07:07.6 |
HIP 9260 |
16.06 |
| 2026-06-09 00:00 |
01:59:48.11 |
+22:07:12.6 |
HIP 9260 |
16.23 |
| 2026-06-09 12:00 |
01:59:48.82 |
+22:07:17.7 |
HIP 9260 |
16.40 |
| 2026-06-10 00:00 |
01:59:49.53 |
+22:07:22.7 |
HIP 9260 |
16.57 |
| 2026-06-10 12:00 |
01:59:50.23 |
+22:07:27.7 |
HIP 9260 |
16.74 |
| 2026-06-11 00:00 |
01:59:50.93 |
+22:07:32.7 |
HIP 9260 |
16.91 |
| 2026-06-11 12:00 |
01:59:51.62 |
+22:07:37.7 |
HIP 9260 |
17.08 |
| 2026-06-12 00:00 |
01:59:52.30 |
+22:07:42.7 |
HIP 9260 |
17.25 |
| 2026-06-12 12:00 |
01:59:52.98 |
+22:07:47.6 |
HIP 9260 |
17.41 |
| 2026-06-13 00:00 |
01:59:53.65 |
+22:07:52.6 |
HIP 9260 |
17.58 |
| 2026-06-13 12:00 |
01:59:54.31 |
+22:07:57.5 |
HIP 9293 |
17.73 |
| 2026-06-14 00:00 |
01:59:54.97 |
+22:08:02.4 |
HIP 9293 |
17.87 |
| 2026-06-14 12:00 |
01:59:55.62 |
+22:08:07.2 |
HIP 9293 |
18.00 |
| 2026-06-15 00:00 |
01:59:56.27 |
+22:08:12.1 |
HIP 9293 |
18.14 |
| 2026-06-15 12:00 |
01:59:56.90 |
+22:08:16.9 |
HIP 9293 |
18.27 |
| 2026-06-16 00:00 |
01:59:57.54 |
+22:08:21.7 |
HIP 9293 |
18.41 |
| 2026-06-16 12:00 |
01:59:58.16 |
+22:08:26.5 |
HIP 9293 |
18.54 |
| 2026-06-17 00:00 |
01:59:58.78 |
+22:08:31.3 |
HIP 9293 |
18.67 |
| 2026-06-17 12:00 |
01:59:59.39 |
+22:08:36.1 |
HIP 9293 |
18.80 |
| 2026-06-18 00:00 |
02:00:00.00 |
+22:08:40.8 |
HIP 9293 |
18.94 |
| 2026-06-18 12:00 |
02:00:00.59 |
+22:08:45.5 |
HIP 9293 |
19.07 |
| 2026-06-19 00:00 |
02:00:01.18 |
+22:08:50.2 |
HIP 9293 |
19.20 |
| 2026-06-19 12:00 |
02:00:01.76 |
+22:08:54.8 |
HIP 9293 |
19.33 |
| 2026-06-20 00:00 |
02:00:02.34 |
+22:08:59.5 |
HIP 9293 |
19.46 |
| 2026-06-20 12:00 |
02:00:02.91 |
+22:09:04.1 |
HIP 9293 |
19.59 |
| 2026-06-21 00:00 |
02:00:03.47 |
+22:09:08.7 |
HIP 9293 |
19.71 |
| 2026-06-21 12:00 |
02:00:04.03 |
+22:09:13.3 |
HIP 9293 |
19.84 |
| 2026-06-22 00:00 |
02:00:04.57 |
+22:09:17.8 |
HIP 9293 |
19.97 |