메타데이터
| 항목 |
값 |
| Designation |
C/2015 H2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-09-13T06:35:06.138240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:09Z |
| Obs used |
204 |
| NEO |
- |
| M1 |
11.300 |
| K1 |
5.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-02-24.0000000 |
| e |
1.00351211 |
| q (au) |
4.967122 |
| a (au) |
-1414.285460 |
| i (deg) |
33.705314 |
| Ω (om, deg) |
350.691893 |
| ω (w, deg) |
287.907632 |
| M (ma, deg) |
0.003034 |
밝기
산란 + 전체 선형
$$
M_a = (8.727 + 2.871\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.727 |
| n |
2.871 |
| gf |
1.000 |
| gb |
-0.966 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2014-05-19 |
2016-09-08 |
+5.0679 |
-3.734 |
| 2016-11-03 |
2018-08-10 |
+6.2905 |
-4.906 |
| 2018-08-10 |
2019-10-22 |
-4.7741 |
+4.167 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
01:48:03.69 |
+38:33:19.4 |
HIP 8292 |
18.40 |
| 2026-07-29 12:00 |
01:48:03.53 |
+38:34:00.2 |
HIP 8292 |
17.95 |
| 2026-07-30 00:00 |
01:48:03.32 |
+38:34:40.9 |
HIP 8292 |
17.51 |
| 2026-07-30 12:00 |
01:48:03.05 |
+38:35:21.2 |
HIP 8292 |
17.08 |
| 2026-07-31 00:00 |
01:48:02.73 |
+38:36:01.4 |
HIP 8292 |
16.66 |
| 2026-07-31 12:00 |
01:48:02.36 |
+38:36:41.3 |
HIP 8292 |
16.25 |
| 2026-08-01 00:00 |
01:48:01.93 |
+38:37:21.0 |
HIP 8292 |
15.85 |
| 2026-08-01 12:00 |
01:48:01.45 |
+38:38:00.5 |
HIP 8292 |
15.47 |
| 2026-08-02 00:00 |
01:48:00.92 |
+38:38:39.7 |
HIP 8292 |
15.09 |
| 2026-08-02 12:00 |
01:48:00.33 |
+38:39:18.6 |
HIP 8292 |
14.72 |
| 2026-08-03 00:00 |
01:47:59.70 |
+38:39:57.3 |
HIP 8292 |
14.37 |
| 2026-08-03 12:00 |
01:47:59.01 |
+38:40:35.8 |
HIP 8292 |
14.03 |
| 2026-08-04 00:00 |
01:47:58.26 |
+38:41:14.0 |
HIP 8292 |
13.71 |
| 2026-08-04 12:00 |
01:47:57.46 |
+38:41:52.0 |
HIP 8292 |
13.40 |
| 2026-08-05 00:00 |
01:47:56.61 |
+38:42:29.7 |
HIP 8292 |
13.11 |
| 2026-08-05 12:00 |
01:47:55.71 |
+38:43:07.2 |
HIP 8292 |
12.83 |
| 2026-08-06 00:00 |
01:47:54.75 |
+38:43:44.4 |
HIP 8292 |
12.57 |
| 2026-08-06 12:00 |
01:47:53.74 |
+38:44:21.3 |
HIP 8292 |
12.33 |
| 2026-08-07 00:00 |
01:47:52.68 |
+38:44:57.9 |
HIP 8292 |
12.11 |
| 2026-08-07 12:00 |
01:47:51.56 |
+38:45:34.3 |
HIP 8292 |
11.91 |
| 2026-08-08 00:00 |
01:47:50.40 |
+38:46:10.5 |
HIP 8292 |
11.73 |
| 2026-08-08 12:00 |
01:47:49.17 |
+38:46:46.3 |
HIP 8292 |
11.57 |
| 2026-08-09 00:00 |
01:47:47.90 |
+38:47:21.9 |
HIP 8292 |
11.43 |
| 2026-08-09 12:00 |
01:47:46.57 |
+38:47:57.2 |
HIP 8292 |
11.32 |
| 2026-08-10 00:00 |
01:47:45.19 |
+38:48:32.2 |
HIP 8292 |
11.24 |
| 2026-08-10 12:00 |
01:47:43.76 |
+38:49:06.9 |
HIP 8292 |
11.18 |
| 2026-08-11 00:00 |
01:47:42.27 |
+38:49:41.3 |
HIP 8292 |
11.14 |
| 2026-08-11 12:00 |
01:47:40.73 |
+38:50:15.5 |
HIP 8292 |
11.13 |
| 2026-08-12 00:00 |
01:47:39.14 |
+38:50:49.3 |
HIP 8292 |
11.15 |
| 2026-08-12 12:00 |
01:47:37.50 |
+38:51:22.9 |
HIP 8284 |
11.08 |
| 2026-08-13 00:00 |
01:47:35.80 |
+38:51:56.2 |
HIP 8284 |
10.57 |
| 2026-08-13 12:00 |
01:47:34.05 |
+38:52:29.1 |
HIP 8284 |
10.07 |
| 2026-08-14 00:00 |
01:47:32.25 |
+38:53:01.8 |
HIP 8284 |
9.58 |
| 2026-08-14 12:00 |
01:47:30.40 |
+38:53:34.1 |
HIP 8284 |
9.09 |
| 2026-08-15 00:00 |
01:47:28.49 |
+38:54:06.2 |
HIP 8284 |
8.63 |
| 2026-08-15 12:00 |
01:47:26.53 |
+38:54:37.9 |
HIP 8284 |
8.17 |
| 2026-08-16 00:00 |
01:47:24.53 |
+38:55:09.3 |
HIP 8284 |
7.74 |
| 2026-08-16 12:00 |
01:47:22.47 |
+38:55:40.5 |
HIP 8284 |
7.33 |
| 2026-08-17 00:00 |
01:47:20.36 |
+38:56:11.2 |
HIP 8284 |
6.94 |
| 2026-08-17 12:00 |
01:47:18.19 |
+38:56:41.7 |
HIP 8284 |
6.59 |
| 2026-08-18 00:00 |
01:47:15.98 |
+38:57:11.9 |
HIP 8284 |
6.28 |
| 2026-08-18 12:00 |
01:47:13.72 |
+38:57:41.7 |
HIP 8284 |
6.01 |
| 2026-08-19 00:00 |
01:47:11.41 |
+38:58:11.2 |
HIP 8284 |
5.80 |