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) |
| 2026-07-29 00:00 |
20:27:34.90 |
-79:51:12.4 |
HIP 100416 |
21.94 |
| 2026-07-29 12:00 |
20:27:27.76 |
-79:51:13.8 |
HIP 100416 |
21.73 |
| 2026-07-30 00:00 |
20:27:20.63 |
-79:51:14.9 |
HIP 100416 |
21.52 |
| 2026-07-30 12:00 |
20:27:13.49 |
-79:51:15.9 |
HIP 100416 |
21.31 |
| 2026-07-31 00:00 |
20:27:06.36 |
-79:51:16.8 |
HIP 100416 |
21.11 |
| 2026-07-31 12:00 |
20:26:59.23 |
-79:51:17.5 |
HIP 100416 |
20.90 |
| 2026-08-01 00:00 |
20:26:52.11 |
-79:51:18.1 |
HIP 100416 |
20.69 |
| 2026-08-01 12:00 |
20:26:44.99 |
-79:51:18.5 |
HIP 100416 |
20.49 |
| 2026-08-02 00:00 |
20:26:37.88 |
-79:51:18.8 |
HIP 100416 |
20.29 |
| 2026-08-02 12:00 |
20:26:30.77 |
-79:51:18.9 |
HIP 100416 |
20.08 |
| 2026-08-03 00:00 |
20:26:23.66 |
-79:51:18.9 |
HIP 100416 |
19.88 |
| 2026-08-03 12:00 |
20:26:16.57 |
-79:51:18.7 |
HIP 100416 |
19.68 |
| 2026-08-04 00:00 |
20:26:09.48 |
-79:51:18.3 |
HIP 100416 |
19.48 |
| 2026-08-04 12:00 |
20:26:02.40 |
-79:51:17.9 |
HIP 100416 |
19.29 |
| 2026-08-05 00:00 |
20:25:55.32 |
-79:51:17.2 |
HIP 100416 |
19.09 |
| 2026-08-05 12:00 |
20:25:48.26 |
-79:51:16.4 |
HIP 100416 |
18.90 |
| 2026-08-06 00:00 |
20:25:41.20 |
-79:51:15.5 |
HIP 100416 |
18.70 |
| 2026-08-06 12:00 |
20:25:34.16 |
-79:51:14.4 |
HIP 100416 |
18.51 |
| 2026-08-07 00:00 |
20:25:27.12 |
-79:51:13.2 |
HIP 100416 |
18.32 |
| 2026-08-07 12:00 |
20:25:20.10 |
-79:51:11.8 |
HIP 100416 |
18.13 |
| 2026-08-08 00:00 |
20:25:13.09 |
-79:51:10.2 |
HIP 100416 |
17.95 |
| 2026-08-08 12:00 |
20:25:06.09 |
-79:51:08.5 |
HIP 100416 |
17.76 |
| 2026-08-09 00:00 |
20:24:59.10 |
-79:51:06.7 |
HIP 100416 |
17.58 |
| 2026-08-09 12:00 |
20:24:52.13 |
-79:51:04.7 |
HIP 100416 |
17.40 |
| 2026-08-10 00:00 |
20:24:45.17 |
-79:51:02.5 |
HIP 100416 |
17.22 |
| 2026-08-10 12:00 |
20:24:38.23 |
-79:51:00.2 |
HIP 100416 |
17.04 |
| 2026-08-11 00:00 |
20:24:31.30 |
-79:50:57.8 |
HIP 100416 |
16.86 |
| 2026-08-11 12:00 |
20:24:24.38 |
-79:50:55.2 |
HIP 100416 |
16.69 |
| 2026-08-12 00:00 |
20:24:17.49 |
-79:50:52.4 |
HIP 100416 |
16.52 |
| 2026-08-12 12:00 |
20:24:10.61 |
-79:50:49.5 |
HIP 100416 |
16.35 |
| 2026-08-13 00:00 |
20:24:03.75 |
-79:50:46.5 |
HIP 100416 |
16.18 |
| 2026-08-13 12:00 |
20:23:56.91 |
-79:50:43.3 |
HIP 100416 |
16.02 |
| 2026-08-14 00:00 |
20:23:50.08 |
-79:50:40.0 |
HIP 100416 |
15.85 |
| 2026-08-14 12:00 |
20:23:43.28 |
-79:50:36.5 |
HIP 100416 |
15.69 |
| 2026-08-15 00:00 |
20:23:36.50 |
-79:50:32.8 |
HIP 100416 |
15.53 |
| 2026-08-15 12:00 |
20:23:29.73 |
-79:50:29.0 |
HIP 100416 |
15.38 |
| 2026-08-16 00:00 |
20:23:22.99 |
-79:50:25.1 |
HIP 100416 |
15.23 |
| 2026-08-16 12:00 |
20:23:16.27 |
-79:50:21.0 |
HIP 100416 |
15.08 |
| 2026-08-17 00:00 |
20:23:09.58 |
-79:50:16.7 |
HIP 100416 |
14.93 |
| 2026-08-17 12:00 |
20:23:02.90 |
-79:50:12.4 |
HIP 100416 |
14.78 |
| 2026-08-18 00:00 |
20:22:56.25 |
-79:50:07.8 |
HIP 100416 |
14.64 |
| 2026-08-18 12:00 |
20:22:49.63 |
-79:50:03.2 |
HIP 100416 |
14.50 |
| 2026-08-19 00:00 |
20:22:43.03 |
-79:49:58.3 |
HIP 100416 |
14.37 |