메타데이터
| 항목 |
값 |
| Designation |
C/1978 H1 (Meier) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1978-11-11T09:49:21.498240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:26Z |
| Obs used |
276 |
| NEO |
- |
| M1 |
5.100 |
| K1 |
7.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1978-12-13.0000000 |
| e |
1.00084968 |
| q (au) |
1.136526 |
| a (au) |
-1337.595649 |
| i (deg) |
43.761381 |
| Ω (om, deg) |
349.344795 |
| ω (w, deg) |
231.402033 |
| M (ma, deg) |
0.000636 |
밝기
산란 + 전체 선형
$$
M_a = (1.696 + 4.508\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
1.696 |
| n |
4.508 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
| 1978-04-27 |
1978-11-09 |
-2.4267 |
+0.754 |
| 1978-11-13 |
1979-12-21 |
-2.6793 |
+1.685 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
00:24:35.81 |
+29:50:51.4 |
HIP 1980 |
6.28 |
| 2026-09-20 12:00 |
00:24:34.13 |
+29:50:45.0 |
HIP 1980 |
6.64 |
| 2026-09-21 00:00 |
00:24:32.45 |
+29:50:38.6 |
HIP 1980 |
7.01 |
| 2026-09-21 12:00 |
00:24:30.77 |
+29:50:32.1 |
HIP 1980 |
7.38 |
| 2026-09-22 00:00 |
00:24:29.09 |
+29:50:25.4 |
HIP 1980 |
7.75 |
| 2026-09-22 12:00 |
00:24:27.40 |
+29:50:18.7 |
HIP 1980 |
8.12 |
| 2026-09-23 00:00 |
00:24:25.71 |
+29:50:11.9 |
HIP 1980 |
8.49 |
| 2026-09-23 12:00 |
00:24:24.02 |
+29:50:04.9 |
HIP 1980 |
8.87 |
| 2026-09-24 00:00 |
00:24:22.33 |
+29:49:57.8 |
HIP 1980 |
9.24 |
| 2026-09-24 12:00 |
00:24:20.64 |
+29:49:50.7 |
HIP 1980 |
9.62 |
| 2026-09-25 00:00 |
00:24:18.94 |
+29:49:43.4 |
HIP 1980 |
10.00 |
| 2026-09-25 12:00 |
00:24:17.25 |
+29:49:36.1 |
HIP 1980 |
10.38 |
| 2026-09-26 00:00 |
00:24:15.55 |
+29:49:28.6 |
HIP 1980 |
10.76 |
| 2026-09-26 12:00 |
00:24:13.85 |
+29:49:21.0 |
HIP 1980 |
11.14 |
| 2026-09-27 00:00 |
00:24:12.15 |
+29:49:13.4 |
HIP 1980 |
11.52 |
| 2026-09-27 12:00 |
00:24:10.46 |
+29:49:05.6 |
HIP 1980 |
11.91 |
| 2026-09-28 00:00 |
00:24:08.76 |
+29:48:57.7 |
HIP 1980 |
12.29 |
| 2026-09-28 12:00 |
00:24:07.06 |
+29:48:49.7 |
HIP 1980 |
12.68 |
| 2026-09-29 00:00 |
00:24:05.35 |
+29:48:41.7 |
HIP 1980 |
13.06 |
| 2026-09-29 12:00 |
00:24:03.65 |
+29:48:33.5 |
HIP 1980 |
13.45 |
| 2026-09-30 00:00 |
00:24:01.95 |
+29:48:25.3 |
HIP 1980 |
13.83 |
| 2026-09-30 12:00 |
00:24:00.25 |
+29:48:16.9 |
HIP 1980 |
14.22 |
| 2026-10-01 00:00 |
00:23:58.55 |
+29:48:08.4 |
HIP 1980 |
14.61 |
| 2026-10-01 12:00 |
00:23:56.85 |
+29:47:59.9 |
HIP 1980 |
15.00 |
| 2026-10-02 00:00 |
00:23:55.15 |
+29:47:51.2 |
HIP 1980 |
15.39 |
| 2026-10-02 12:00 |
00:23:53.45 |
+29:47:42.5 |
HIP 1980 |
15.78 |
| 2026-10-03 00:00 |
00:23:51.75 |
+29:47:33.7 |
HIP 1980 |
16.17 |
| 2026-10-03 12:00 |
00:23:50.05 |
+29:47:24.7 |
HIP 1980 |
16.56 |
| 2026-10-04 00:00 |
00:23:48.36 |
+29:47:15.7 |
HIP 1980 |
16.95 |
| 2026-10-04 12:00 |
00:23:46.66 |
+29:47:06.6 |
HIP 1891 |
17.02 |
| 2026-10-05 00:00 |
00:23:44.96 |
+29:46:57.4 |
HIP 1891 |
16.90 |
| 2026-10-05 12:00 |
00:23:43.27 |
+29:46:48.1 |
HIP 1891 |
16.79 |
| 2026-10-06 00:00 |
00:23:41.58 |
+29:46:38.7 |
HIP 1891 |
16.69 |
| 2026-10-06 12:00 |
00:23:39.89 |
+29:46:29.2 |
HIP 1891 |
16.59 |
| 2026-10-07 00:00 |
00:23:38.20 |
+29:46:19.7 |
HIP 1891 |
16.50 |
| 2026-10-07 12:00 |
00:23:36.51 |
+29:46:10.0 |
HIP 1891 |
16.42 |
| 2026-10-08 00:00 |
00:23:34.83 |
+29:46:00.3 |
HIP 1891 |
16.35 |
| 2026-10-08 12:00 |
00:23:33.14 |
+29:45:50.4 |
HIP 1891 |
16.28 |
| 2026-10-09 00:00 |
00:23:31.46 |
+29:45:40.5 |
HIP 1891 |
16.23 |
| 2026-10-09 12:00 |
00:23:29.78 |
+29:45:30.5 |
HIP 1891 |
16.18 |
| 2026-10-10 00:00 |
00:23:28.11 |
+29:45:20.4 |
HIP 1891 |
16.14 |
| 2026-10-10 12:00 |
00:23:26.43 |
+29:45:10.3 |
HIP 1891 |
16.11 |
| 2026-10-11 00:00 |
00:23:24.76 |
+29:45:00.0 |
HIP 1891 |
16.08 |