메타데이터
| 항목 |
값 |
| Designation |
C/1954 O2 (Baade) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1955-08-13T07:51:21.994560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
35 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1955-09-19.0000000 |
| e |
1.00055852 |
| q (au) |
3.869944 |
| a (au) |
-6928.925768 |
| i (deg) |
100.387736 |
| Ω (om, deg) |
265.340699 |
| ω (w, deg) |
144.674890 |
| M (ma, deg) |
0.000063 |
밝기
산란 + 전체 선형
$$
M_a = (-0.462 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-0.462 |
| n |
6.000 |
| 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 |
| 1955-09-09 |
1957-11-02 |
+4.8428 |
-3.023 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
20:39:22.99 |
-78:59:14.9 |
HIP 102428 |
18.08 |
| 2026-03-26 12:00 |
20:39:26.39 |
-78:59:27.3 |
HIP 102428 |
17.86 |
| 2026-03-27 00:00 |
20:39:29.74 |
-78:59:39.7 |
HIP 102428 |
17.64 |
| 2026-03-27 12:00 |
20:39:33.04 |
-78:59:52.3 |
HIP 102428 |
17.42 |
| 2026-03-28 00:00 |
20:39:36.30 |
-79:00:05.0 |
HIP 102428 |
17.20 |
| 2026-03-28 12:00 |
20:39:39.51 |
-79:00:17.7 |
HIP 102428 |
16.99 |
| 2026-03-29 00:00 |
20:39:42.68 |
-79:00:30.6 |
HIP 102428 |
16.78 |
| 2026-03-29 12:00 |
20:39:45.80 |
-79:00:43.5 |
HIP 102428 |
16.58 |
| 2026-03-30 00:00 |
20:39:48.87 |
-79:00:56.5 |
HIP 102428 |
16.37 |
| 2026-03-30 12:00 |
20:39:51.90 |
-79:01:09.6 |
HIP 102428 |
16.17 |
| 2026-03-31 00:00 |
20:39:54.88 |
-79:01:22.8 |
HIP 102428 |
15.98 |
| 2026-03-31 12:00 |
20:39:57.81 |
-79:01:36.0 |
HIP 102428 |
15.79 |
| 2026-04-01 00:00 |
20:40:00.69 |
-79:01:49.4 |
HIP 102428 |
15.60 |
| 2026-04-01 12:00 |
20:40:03.53 |
-79:02:02.8 |
HIP 102428 |
15.42 |
| 2026-04-02 00:00 |
20:40:06.31 |
-79:02:16.3 |
HIP 102428 |
15.24 |
| 2026-04-02 12:00 |
20:40:09.05 |
-79:02:29.9 |
HIP 102428 |
15.06 |
| 2026-04-03 00:00 |
20:40:11.75 |
-79:02:43.6 |
HIP 102428 |
14.89 |
| 2026-04-03 12:00 |
20:40:14.39 |
-79:02:57.4 |
HIP 102428 |
14.73 |
| 2026-04-04 00:00 |
20:40:16.98 |
-79:03:11.2 |
HIP 102428 |
14.56 |
| 2026-04-04 12:00 |
20:40:19.53 |
-79:03:25.1 |
HIP 102428 |
14.41 |
| 2026-04-05 00:00 |
20:40:22.02 |
-79:03:39.1 |
HIP 102428 |
14.26 |
| 2026-04-05 12:00 |
20:40:24.47 |
-79:03:53.1 |
HIP 102428 |
14.11 |
| 2026-04-06 00:00 |
20:40:26.86 |
-79:04:07.3 |
HIP 102428 |
13.98 |
| 2026-04-06 12:00 |
20:40:29.21 |
-79:04:21.5 |
HIP 102428 |
13.84 |
| 2026-04-07 00:00 |
20:40:31.50 |
-79:04:35.7 |
HIP 102428 |
13.72 |
| 2026-04-07 12:00 |
20:40:33.75 |
-79:04:50.1 |
HIP 102428 |
13.60 |
| 2026-04-08 00:00 |
20:40:35.94 |
-79:05:04.5 |
HIP 102428 |
13.48 |
| 2026-04-08 12:00 |
20:40:38.08 |
-79:05:19.0 |
HIP 102428 |
13.37 |
| 2026-04-09 00:00 |
20:40:40.17 |
-79:05:33.6 |
HIP 102428 |
13.27 |
| 2026-04-09 12:00 |
20:40:42.22 |
-79:05:48.2 |
HIP 102428 |
13.18 |
| 2026-04-10 00:00 |
20:40:44.20 |
-79:06:02.9 |
HIP 102428 |
13.09 |
| 2026-04-10 12:00 |
20:40:46.14 |
-79:06:17.6 |
HIP 102428 |
13.01 |
| 2026-04-11 00:00 |
20:40:48.03 |
-79:06:32.4 |
HIP 102428 |
12.94 |
| 2026-04-11 12:00 |
20:40:49.86 |
-79:06:47.3 |
HIP 102428 |
12.88 |
| 2026-04-12 00:00 |
20:40:51.64 |
-79:07:02.3 |
HIP 102428 |
12.82 |
| 2026-04-12 12:00 |
20:40:53.37 |
-79:07:17.3 |
HIP 102428 |
12.77 |
| 2026-04-13 00:00 |
20:40:55.04 |
-79:07:32.3 |
HIP 102428 |
12.73 |
| 2026-04-13 12:00 |
20:40:56.66 |
-79:07:47.4 |
HIP 102428 |
12.70 |
| 2026-04-14 00:00 |
20:40:58.23 |
-79:08:02.6 |
HIP 102428 |
12.67 |
| 2026-04-14 12:00 |
20:40:59.75 |
-79:08:17.9 |
HIP 102428 |
12.66 |
| 2026-04-15 00:00 |
20:41:01.21 |
-79:08:33.2 |
HIP 102428 |
12.65 |
| 2026-04-15 12:00 |
20:41:02.61 |
-79:08:48.5 |
HIP 102428 |
12.65 |
| 2026-04-16 00:00 |
20:41:03.97 |
-79:09:03.9 |
HIP 102428 |
12.65 |