C/2014 H1 (Christensen)

Metadata

Parameter Value
Designation C/2014 H1 (Christensen)
Type C
Perihelion (tp_cal, UTC) 2014-04-15T07:54:21.663360Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:32:53Z
Obs used 105
NEO -
M1 14.800
K1 10.000
PC -
Osculating Elements
Parameter Value
Epoch (epoch_cal, TDB) 2014-05-03.0000000
e 0.98485086
q (au) 2.138899
a (au) 141.189497
i (deg) 99.935932
Ω (om, deg) 34.701528
ω (w, deg) 169.184849
M (ma, deg) 0.010381

Magnitude

C/2014 H1 (Christensen) · Magnitude (Full range)

Scatter + Global Linear

$$ M_a = (18.467 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

Model Parameters

Parameter Value
H0 18.467
n 2.000
gf 1.000
gb -0.651
k 0.800
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 03:36:07.41 -21:54:44.9 HIP 16680 25.00
2026-06-01 12:00 03:36:11.50 -21:54:40.1 HIP 16680 25.84
2026-06-02 00:00 03:36:15.58 -21:54:35.7 HIP 16932 25.41
2026-06-02 12:00 03:36:19.65 -21:54:31.7 HIP 16932 24.60
2026-06-03 00:00 03:36:23.71 -21:54:28.0 HIP 16932 23.80
2026-06-03 12:00 03:36:27.76 -21:54:24.6 HIP 16932 23.01
2026-06-04 00:00 03:36:31.80 -21:54:21.6 HIP 16932 22.23
2026-06-04 12:00 03:36:35.83 -21:54:19.0 HIP 16932 21.46
2026-06-05 00:00 03:36:39.85 -21:54:16.8 HIP 16932 20.70
2026-06-05 12:00 03:36:43.86 -21:54:14.9 HIP 16932 19.96
2026-06-06 00:00 03:36:47.86 -21:54:13.3 HIP 16932 19.23
2026-06-06 12:00 03:36:51.84 -21:54:12.1 HIP 16932 18.52
2026-06-07 00:00 03:36:55.82 -21:54:11.3 HIP 16932 17.83
2026-06-07 12:00 03:36:59.78 -21:54:10.8 HIP 16932 17.15
2026-06-08 00:00 03:37:03.73 -21:54:10.7 HIP 16932 16.50
2026-06-08 12:00 03:37:07.67 -21:54:10.9 HIP 16932 15.87
2026-06-09 00:00 03:37:11.60 -21:54:11.5 HIP 16932 15.26
2026-06-09 12:00 03:37:15.51 -21:54:12.4 HIP 16932 14.68
2026-06-10 00:00 03:37:19.41 -21:54:13.7 HIP 16932 14.14
2026-06-10 12:00 03:37:23.29 -21:54:15.4 HIP 16932 13.63
2026-06-11 00:00 03:37:27.17 -21:54:17.4 HIP 16932 13.16
2026-06-11 12:00 03:37:31.03 -21:54:19.8 HIP 16932 12.73
2026-06-12 00:00 03:37:34.87 -21:54:22.5 HIP 16932 12.35
2026-06-12 12:00 03:37:38.70 -21:54:25.6 HIP 16932 12.01
2026-06-13 00:00 03:37:42.51 -21:54:29.1 HIP 16932 11.73
2026-06-13 12:00 03:37:46.31 -21:54:32.9 HIP 16932 11.50
2026-06-14 00:00 03:37:50.10 -21:54:37.0 HIP 16932 11.34
2026-06-14 12:00 03:37:53.87 -21:54:41.5 HIP 16932 11.23
2026-06-15 00:00 03:37:57.62 -21:54:46.4 HIP 16932 11.19
2026-06-15 12:00 03:38:01.35 -21:54:51.6 HIP 16932 11.20
2026-06-16 00:00 03:38:05.07 -21:54:57.2 HIP 16932 11.28
2026-06-16 12:00 03:38:08.77 -21:55:03.1 HIP 16932 11.42
2026-06-17 00:00 03:38:12.46 -21:55:09.4 HIP 16932 11.61
2026-06-17 12:00 03:38:16.13 -21:55:16.0 HIP 16932 11.86
2026-06-18 00:00 03:38:19.78 -21:55:23.0 HIP 16932 12.15
2026-06-18 12:00 03:38:23.41 -21:55:30.3 HIP 16932 12.49
2026-06-19 00:00 03:38:27.02 -21:55:38.0 HIP 16932 12.86
2026-06-19 12:00 03:38:30.62 -21:55:46.1 HIP 16932 13.28
2026-06-20 00:00 03:38:34.19 -21:55:54.4 HIP 16932 13.72
2026-06-20 12:00 03:38:37.75 -21:56:03.2 HIP 16932 14.20
2026-06-21 00:00 03:38:41.29 -21:56:12.2 HIP 16932 14.70
2026-06-21 12:00 03:38:44.81 -21:56:21.6 HIP 16932 15.22
2026-06-22 00:00 03:38:48.31 -21:56:31.4 HIP 16932 15.76