| Parameter |
Value |
| Designation |
C/1958 D1 (Burnham) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1958-04-16T07:16:54.157440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
22 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1958-04-26.0000000 |
| e |
0.99991611 |
| q (au) |
1.322687 |
| a (au) |
15766.142934 |
| i (deg) |
15.787940 |
| Ω (om, deg) |
151.194462 |
| ω (w, deg) |
16.465841 |
| M (ma, deg) |
0.000005 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.825 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.825 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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 |
| 1958-02-22 |
1958-04-15 |
+53.8968 |
-6.982 |
| 1958-04-17 |
1958-09-15 |
+11.0165 |
-1.782 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
22:23:37.75 |
-10:58:09.7 |
HIP 110439 |
22.36 |
| 2026-09-20 12:00 |
22:23:36.64 |
-10:58:16.0 |
HIP 110439 |
22.14 |
| 2026-09-21 00:00 |
22:23:35.54 |
-10:58:22.3 |
HIP 110439 |
21.92 |
| 2026-09-21 12:00 |
22:23:34.44 |
-10:58:28.6 |
HIP 110439 |
21.70 |
| 2026-09-22 00:00 |
22:23:33.34 |
-10:58:34.9 |
HIP 110439 |
21.49 |
| 2026-09-22 12:00 |
22:23:32.25 |
-10:58:41.1 |
HIP 110439 |
21.27 |
| 2026-09-23 00:00 |
22:23:31.17 |
-10:58:47.3 |
HIP 110439 |
21.06 |
| 2026-09-23 12:00 |
22:23:30.09 |
-10:58:53.4 |
HIP 110439 |
20.86 |
| 2026-09-24 00:00 |
22:23:29.01 |
-10:58:59.5 |
HIP 110439 |
20.65 |
| 2026-09-24 12:00 |
22:23:27.94 |
-10:59:05.6 |
HIP 110439 |
20.45 |
| 2026-09-25 00:00 |
22:23:26.87 |
-10:59:11.7 |
HIP 110439 |
20.25 |
| 2026-09-25 12:00 |
22:23:25.81 |
-10:59:17.7 |
HIP 110439 |
20.06 |
| 2026-09-26 00:00 |
22:23:24.75 |
-10:59:23.8 |
HIP 110439 |
19.87 |
| 2026-09-26 12:00 |
22:23:23.70 |
-10:59:29.7 |
HIP 110439 |
19.68 |
| 2026-09-27 00:00 |
22:23:22.66 |
-10:59:35.7 |
HIP 110439 |
19.49 |
| 2026-09-27 12:00 |
22:23:21.61 |
-10:59:41.6 |
HIP 110439 |
19.31 |
| 2026-09-28 00:00 |
22:23:20.58 |
-10:59:47.4 |
HIP 110439 |
19.13 |
| 2026-09-28 12:00 |
22:23:19.55 |
-10:59:53.3 |
HIP 110439 |
18.95 |
| 2026-09-29 00:00 |
22:23:18.53 |
-10:59:59.1 |
HIP 110439 |
18.78 |
| 2026-09-29 12:00 |
22:23:17.51 |
-11:00:04.8 |
HIP 110439 |
18.60 |
| 2026-09-30 00:00 |
22:23:16.49 |
-11:00:10.6 |
HIP 110439 |
18.44 |
| 2026-09-30 12:00 |
22:23:15.49 |
-11:00:16.3 |
HIP 110439 |
18.27 |
| 2026-10-01 00:00 |
22:23:14.49 |
-11:00:21.9 |
HIP 110439 |
18.11 |
| 2026-10-01 12:00 |
22:23:13.49 |
-11:00:27.6 |
HIP 110439 |
17.95 |
| 2026-10-02 00:00 |
22:23:12.50 |
-11:00:33.1 |
HIP 110439 |
17.80 |
| 2026-10-02 12:00 |
22:23:11.52 |
-11:00:38.7 |
HIP 110439 |
17.65 |
| 2026-10-03 00:00 |
22:23:10.54 |
-11:00:44.2 |
HIP 110439 |
17.50 |
| 2026-10-03 12:00 |
22:23:09.57 |
-11:00:49.7 |
HIP 110439 |
17.36 |
| 2026-10-04 00:00 |
22:23:08.61 |
-11:00:55.1 |
HIP 110439 |
17.21 |
| 2026-10-04 12:00 |
22:23:07.65 |
-11:01:00.5 |
HIP 110439 |
17.08 |
| 2026-10-05 00:00 |
22:23:06.70 |
-11:01:05.9 |
HIP 110439 |
16.94 |
| 2026-10-05 12:00 |
22:23:05.75 |
-11:01:11.2 |
HIP 110439 |
16.81 |
| 2026-10-06 00:00 |
22:23:04.81 |
-11:01:16.5 |
HIP 110439 |
16.69 |
| 2026-10-06 12:00 |
22:23:03.88 |
-11:01:21.7 |
HIP 110439 |
16.56 |
| 2026-10-07 00:00 |
22:23:02.96 |
-11:01:26.9 |
HIP 110439 |
16.44 |
| 2026-10-07 12:00 |
22:23:02.04 |
-11:01:32.0 |
HIP 110439 |
16.33 |
| 2026-10-08 00:00 |
22:23:01.13 |
-11:01:37.1 |
HIP 110439 |
16.22 |
| 2026-10-08 12:00 |
22:23:00.23 |
-11:01:42.2 |
HIP 110439 |
16.11 |
| 2026-10-09 00:00 |
22:22:59.33 |
-11:01:47.2 |
HIP 110439 |
16.00 |
| 2026-10-09 12:00 |
22:22:58.44 |
-11:01:52.2 |
HIP 110439 |
15.90 |
| 2026-10-10 00:00 |
22:22:57.56 |
-11:01:57.1 |
HIP 110439 |
15.80 |
| 2026-10-10 12:00 |
22:22:56.68 |
-11:02:02.0 |
HIP 110439 |
15.71 |
| 2026-10-11 00:00 |
22:22:55.82 |
-11:02:06.9 |
HIP 110439 |
15.61 |