| Parameter |
Value |
| Designation |
C/1952 M1 (Peltier) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1952-07-15T06:06:23.693760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:10Z |
| Obs used |
30 |
| NEO |
- |
| M1 |
9.100 |
| K1 |
23.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1952-08-08.0000000 |
| e |
0.99975208 |
| q (au) |
1.201937 |
| a (au) |
4848.007632 |
| i (deg) |
45.552738 |
| Ω (om, deg) |
188.643743 |
| ω (w, deg) |
96.584082 |
| M (ma, deg) |
0.000069 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.443 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.443 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
| 1952-07-15 |
1952-11-20 |
+11.5410 |
-1.417 |
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 |
05:59:10.12 |
-21:19:34.4 |
HIP 28407 |
12.82 |
| 2026-06-01 12:00 |
05:59:11.34 |
-21:19:30.2 |
HIP 28407 |
12.59 |
| 2026-06-02 00:00 |
05:59:12.56 |
-21:19:26.0 |
HIP 28407 |
12.36 |
| 2026-06-02 12:00 |
05:59:13.79 |
-21:19:22.0 |
HIP 28407 |
12.14 |
| 2026-06-03 00:00 |
05:59:15.03 |
-21:19:18.0 |
HIP 28407 |
11.91 |
| 2026-06-03 12:00 |
05:59:16.26 |
-21:19:14.2 |
HIP 28407 |
11.69 |
| 2026-06-04 00:00 |
05:59:17.50 |
-21:19:10.4 |
HIP 28407 |
11.47 |
| 2026-06-04 12:00 |
05:59:18.74 |
-21:19:06.8 |
HIP 28407 |
11.25 |
| 2026-06-05 00:00 |
05:59:19.99 |
-21:19:03.2 |
HIP 28407 |
11.03 |
| 2026-06-05 12:00 |
05:59:21.24 |
-21:18:59.8 |
HIP 28407 |
10.82 |
| 2026-06-06 00:00 |
05:59:22.49 |
-21:18:56.4 |
HIP 28407 |
10.60 |
| 2026-06-06 12:00 |
05:59:23.74 |
-21:18:53.2 |
HIP 28407 |
10.39 |
| 2026-06-07 00:00 |
05:59:25.00 |
-21:18:50.1 |
HIP 28407 |
10.19 |
| 2026-06-07 12:00 |
05:59:26.26 |
-21:18:47.0 |
HIP 28407 |
9.98 |
| 2026-06-08 00:00 |
05:59:27.52 |
-21:18:44.1 |
HIP 28407 |
9.78 |
| 2026-06-08 12:00 |
05:59:28.78 |
-21:18:41.3 |
HIP 28407 |
9.58 |
| 2026-06-09 00:00 |
05:59:30.05 |
-21:18:38.5 |
HIP 28407 |
9.39 |
| 2026-06-09 12:00 |
05:59:31.32 |
-21:18:35.9 |
HIP 28407 |
9.20 |
| 2026-06-10 00:00 |
05:59:32.59 |
-21:18:33.4 |
HIP 28407 |
9.02 |
| 2026-06-10 12:00 |
05:59:33.86 |
-21:18:31.0 |
HIP 28407 |
8.84 |
| 2026-06-11 00:00 |
05:59:35.13 |
-21:18:28.7 |
HIP 28407 |
8.66 |
| 2026-06-11 12:00 |
05:59:36.41 |
-21:18:26.5 |
HIP 28407 |
8.49 |
| 2026-06-12 00:00 |
05:59:37.69 |
-21:18:24.4 |
HIP 28407 |
8.32 |
| 2026-06-12 12:00 |
05:59:38.97 |
-21:18:22.4 |
HIP 28407 |
8.17 |
| 2026-06-13 00:00 |
05:59:40.25 |
-21:18:20.5 |
HIP 28407 |
8.01 |
| 2026-06-13 12:00 |
05:59:41.53 |
-21:18:18.7 |
HIP 28407 |
7.87 |
| 2026-06-14 00:00 |
05:59:42.82 |
-21:18:17.0 |
HIP 28407 |
7.73 |
| 2026-06-14 12:00 |
05:59:44.10 |
-21:18:15.4 |
HIP 28407 |
7.60 |
| 2026-06-15 00:00 |
05:59:45.39 |
-21:18:14.0 |
HIP 28407 |
7.48 |
| 2026-06-15 12:00 |
05:59:46.68 |
-21:18:12.6 |
HIP 28407 |
7.37 |
| 2026-06-16 00:00 |
05:59:47.97 |
-21:18:11.3 |
HIP 28407 |
7.26 |
| 2026-06-16 12:00 |
05:59:49.26 |
-21:18:10.2 |
HIP 28407 |
7.17 |
| 2026-06-17 00:00 |
05:59:50.55 |
-21:18:09.1 |
HIP 28407 |
7.08 |
| 2026-06-17 12:00 |
05:59:51.84 |
-21:18:08.2 |
HIP 28407 |
7.00 |
| 2026-06-18 00:00 |
05:59:53.13 |
-21:18:07.4 |
HIP 28407 |
6.94 |
| 2026-06-18 12:00 |
05:59:54.43 |
-21:18:06.6 |
HIP 28407 |
6.89 |
| 2026-06-19 00:00 |
05:59:55.72 |
-21:18:06.0 |
HIP 28407 |
6.84 |
| 2026-06-19 12:00 |
05:59:57.01 |
-21:18:05.5 |
HIP 28407 |
6.81 |
| 2026-06-20 00:00 |
05:59:58.31 |
-21:18:05.1 |
HIP 28407 |
6.79 |
| 2026-06-20 12:00 |
05:59:59.60 |
-21:18:04.8 |
HIP 28407 |
6.78 |
| 2026-06-21 00:00 |
06:00:00.90 |
-21:18:04.6 |
HIP 28407 |
6.79 |
| 2026-06-21 12:00 |
06:00:02.19 |
-21:18:04.5 |
HIP 28407 |
6.80 |
| 2026-06-22 00:00 |
06:00:03.49 |
-21:18:04.5 |
HIP 28407 |
6.83 |