메타데이터
| 항목 |
값 |
| Designation |
C/2010 B1 (Cardinal) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-02-07T01:26:00.456000Z |
| Orbit solution date (soln_date, UTC) |
2025-06-26T10:12:44Z |
| Obs used |
2090 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
7.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2010-10-26.0000000 |
| e |
0.99899435 |
| q (au) |
2.941487 |
| a (au) |
2924.960222 |
| i (deg) |
101.977683 |
| Ω (om, deg) |
277.213907 |
| ω (w, deg) |
211.519913 |
| M (ma, deg) |
359.999352 |
밝기
산란 + 전체 선형
$$
M_a = (10.296 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.296 |
| n |
2.000 |
| gf |
0.998 |
| gb |
-0.978 |
| 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 |
| 2010-01-19 |
2010-08-30 |
+4.8225 |
-3.111 |
| 2010-08-30 |
2011-02-06 |
-10.8522 |
+5.203 |
| 2011-02-07 |
2012-02-12 |
+3.6110 |
-1.630 |
| 2012-02-12 |
2014-03-13 |
-14.7522 |
+11.129 |
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 |
18:27:41.83 |
-26:39:16.8 |
HIP 90478 |
1.27 |
| 2026-09-20 12:00 |
18:27:41.18 |
-26:39:09.9 |
HIP 90478 |
1.23 |
| 2026-09-21 00:00 |
18:27:40.56 |
-26:39:03.1 |
HIP 90478 |
1.20 |
| 2026-09-21 12:00 |
18:27:39.98 |
-26:38:56.2 |
HIP 90478 |
1.20 |
| 2026-09-22 00:00 |
18:27:39.43 |
-26:38:49.4 |
HIP 90478 |
1.22 |
| 2026-09-22 12:00 |
18:27:38.92 |
-26:38:42.5 |
HIP 90478 |
1.25 |
| 2026-09-23 00:00 |
18:27:38.44 |
-26:38:35.5 |
HIP 90478 |
1.29 |
| 2026-09-23 12:00 |
18:27:38.00 |
-26:38:28.6 |
HIP 90478 |
1.35 |
| 2026-09-24 00:00 |
18:27:37.59 |
-26:38:21.6 |
HIP 90478 |
1.41 |
| 2026-09-24 12:00 |
18:27:37.22 |
-26:38:14.6 |
HIP 90478 |
1.47 |
| 2026-09-25 00:00 |
18:27:36.88 |
-26:38:07.6 |
HIP 90478 |
1.54 |
| 2026-09-25 12:00 |
18:27:36.58 |
-26:38:00.6 |
HIP 90478 |
1.61 |
| 2026-09-26 00:00 |
18:27:36.31 |
-26:37:53.6 |
HIP 90478 |
1.68 |
| 2026-09-26 12:00 |
18:27:36.08 |
-26:37:46.5 |
HIP 90478 |
1.74 |
| 2026-09-27 00:00 |
18:27:35.88 |
-26:37:39.4 |
HIP 90478 |
1.81 |
| 2026-09-27 12:00 |
18:27:35.72 |
-26:37:32.3 |
HIP 90478 |
1.88 |
| 2026-09-28 00:00 |
18:27:35.59 |
-26:37:25.2 |
HIP 90478 |
1.94 |
| 2026-09-28 12:00 |
18:27:35.50 |
-26:37:18.1 |
HIP 90478 |
2.01 |
| 2026-09-29 00:00 |
18:27:35.44 |
-26:37:10.9 |
HIP 90478 |
2.07 |
| 2026-09-29 12:00 |
18:27:35.42 |
-26:37:03.7 |
HIP 90478 |
2.13 |
| 2026-09-30 00:00 |
18:27:35.43 |
-26:36:56.5 |
HIP 90478 |
2.18 |
| 2026-09-30 12:00 |
18:27:35.47 |
-26:36:49.3 |
HIP 90478 |
2.24 |
| 2026-10-01 00:00 |
18:27:35.55 |
-26:36:42.1 |
HIP 90478 |
2.30 |
| 2026-10-01 12:00 |
18:27:35.67 |
-26:36:34.9 |
HIP 90478 |
2.35 |
| 2026-10-02 00:00 |
18:27:35.82 |
-26:36:27.6 |
HIP 90478 |
2.41 |
| 2026-10-02 12:00 |
18:27:36.00 |
-26:36:20.3 |
HIP 90478 |
2.46 |
| 2026-10-03 00:00 |
18:27:36.22 |
-26:36:13.0 |
HIP 90478 |
2.52 |
| 2026-10-03 12:00 |
18:27:36.48 |
-26:36:05.7 |
HIP 90478 |
2.57 |
| 2026-10-04 00:00 |
18:27:36.77 |
-26:35:58.4 |
HIP 90478 |
2.63 |
| 2026-10-04 12:00 |
18:27:37.09 |
-26:35:51.1 |
HIP 90478 |
2.69 |
| 2026-10-05 00:00 |
18:27:37.45 |
-26:35:43.7 |
HIP 90478 |
2.75 |
| 2026-10-05 12:00 |
18:27:37.84 |
-26:35:36.3 |
HIP 90478 |
2.81 |
| 2026-10-06 00:00 |
18:27:38.27 |
-26:35:29.0 |
HIP 90478 |
2.88 |
| 2026-10-06 12:00 |
18:27:38.73 |
-26:35:21.6 |
HIP 90478 |
2.95 |
| 2026-10-07 00:00 |
18:27:39.23 |
-26:35:14.1 |
HIP 90478 |
3.02 |
| 2026-10-07 12:00 |
18:27:39.76 |
-26:35:06.7 |
HIP 90478 |
3.11 |
| 2026-10-08 00:00 |
18:27:40.32 |
-26:34:59.3 |
HIP 90478 |
3.19 |
| 2026-10-08 12:00 |
18:27:40.92 |
-26:34:51.8 |
HIP 90478 |
3.28 |
| 2026-10-09 00:00 |
18:27:41.56 |
-26:34:44.3 |
HIP 90478 |
3.38 |
| 2026-10-09 12:00 |
18:27:42.22 |
-26:34:36.8 |
HIP 90478 |
3.49 |
| 2026-10-10 00:00 |
18:27:42.93 |
-26:34:29.4 |
HIP 90478 |
3.60 |
| 2026-10-10 12:00 |
18:27:43.66 |
-26:34:21.8 |
HIP 90478 |
3.72 |
| 2026-10-11 00:00 |
18:27:44.43 |
-26:34:14.3 |
HIP 90478 |
3.85 |