메타데이터
| 항목 |
값 |
| Designation |
C/2000 SV74 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-30T12:44:48.128640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:06Z |
| Obs used |
2039 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
5.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2002-12-17.0000000 |
| e |
1.00486188 |
| q (au) |
3.541897 |
| a (au) |
-728.503515 |
| i (deg) |
75.236666 |
| Ω (om, deg) |
24.186314 |
| ω (w, deg) |
76.239354 |
| M (ma, deg) |
0.011552 |
밝기
산란 + 전체 선형
$$
M_a = (4.901 + 3.631\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.901 |
| n |
3.631 |
| gf |
0.850 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.002 |
| 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 |
| 2000-10-21 |
2002-04-10 |
-2.1213 |
+1.220 |
| 2002-04-30 |
2005-04-05 |
-2.0065 |
+1.694 |
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 |
13:00:34.92 |
-52:48:54.4 |
HIP 63430 |
12.74 |
| 2026-03-26 12:00 |
13:00:30.73 |
-52:48:52.3 |
HIP 63430 |
12.48 |
| 2026-03-27 00:00 |
13:00:26.53 |
-52:48:49.9 |
HIP 63430 |
12.25 |
| 2026-03-27 12:00 |
13:00:22.32 |
-52:48:47.2 |
HIP 63430 |
12.05 |
| 2026-03-28 00:00 |
13:00:18.10 |
-52:48:44.2 |
HIP 63430 |
11.89 |
| 2026-03-28 12:00 |
13:00:13.88 |
-52:48:41.0 |
HIP 63430 |
11.77 |
| 2026-03-29 00:00 |
13:00:09.66 |
-52:48:37.5 |
HIP 63430 |
11.68 |
| 2026-03-29 12:00 |
13:00:05.43 |
-52:48:33.7 |
HIP 63430 |
11.63 |
| 2026-03-30 00:00 |
13:00:01.19 |
-52:48:29.6 |
HIP 63430 |
11.63 |
| 2026-03-30 12:00 |
12:59:56.95 |
-52:48:25.2 |
HIP 63430 |
11.66 |
| 2026-03-31 00:00 |
12:59:52.71 |
-52:48:20.6 |
HIP 63430 |
11.73 |
| 2026-03-31 12:00 |
12:59:48.46 |
-52:48:15.7 |
HIP 63430 |
11.85 |
| 2026-04-01 00:00 |
12:59:44.21 |
-52:48:10.5 |
HIP 63430 |
12.00 |
| 2026-04-01 12:00 |
12:59:39.95 |
-52:48:05.1 |
HIP 63430 |
12.18 |
| 2026-04-02 00:00 |
12:59:35.69 |
-52:47:59.3 |
HIP 63430 |
12.41 |
| 2026-04-02 12:00 |
12:59:31.43 |
-52:47:53.3 |
HIP 63430 |
12.66 |
| 2026-04-03 00:00 |
12:59:27.17 |
-52:47:47.0 |
HIP 63430 |
12.95 |
| 2026-04-03 12:00 |
12:59:22.90 |
-52:47:40.5 |
HIP 63430 |
13.27 |
| 2026-04-04 00:00 |
12:59:18.64 |
-52:47:33.7 |
HIP 63430 |
13.62 |
| 2026-04-04 12:00 |
12:59:14.37 |
-52:47:26.6 |
HIP 63430 |
13.99 |
| 2026-04-05 00:00 |
12:59:10.10 |
-52:47:19.2 |
HIP 63430 |
14.39 |
| 2026-04-05 12:00 |
12:59:05.83 |
-52:47:11.6 |
HIP 63272 |
14.56 |
| 2026-04-06 00:00 |
12:59:01.56 |
-52:47:03.7 |
HIP 63272 |
14.01 |
| 2026-04-06 12:00 |
12:58:57.29 |
-52:46:55.5 |
HIP 63272 |
13.47 |
| 2026-04-07 00:00 |
12:58:53.02 |
-52:46:47.1 |
HIP 63272 |
12.94 |
| 2026-04-07 12:00 |
12:58:48.75 |
-52:46:38.4 |
HIP 63272 |
12.42 |
| 2026-04-08 00:00 |
12:58:44.49 |
-52:46:29.4 |
HIP 63272 |
11.91 |
| 2026-04-08 12:00 |
12:58:40.22 |
-52:46:20.2 |
HIP 63272 |
11.41 |
| 2026-04-09 00:00 |
12:58:35.95 |
-52:46:10.7 |
HIP 63272 |
10.92 |
| 2026-04-09 12:00 |
12:58:31.69 |
-52:46:00.9 |
HIP 63272 |
10.45 |
| 2026-04-10 00:00 |
12:58:27.43 |
-52:45:50.9 |
HIP 63272 |
10.00 |
| 2026-04-10 12:00 |
12:58:23.18 |
-52:45:40.6 |
HIP 63272 |
9.57 |
| 2026-04-11 00:00 |
12:58:18.92 |
-52:45:30.1 |
HIP 63272 |
9.17 |
| 2026-04-11 12:00 |
12:58:14.67 |
-52:45:19.3 |
HIP 63272 |
8.79 |
| 2026-04-12 00:00 |
12:58:10.42 |
-52:45:08.2 |
HIP 63272 |
8.45 |
| 2026-04-12 12:00 |
12:58:06.18 |
-52:44:56.9 |
HIP 63272 |
8.14 |
| 2026-04-13 00:00 |
12:58:01.94 |
-52:44:45.3 |
HIP 63272 |
7.87 |
| 2026-04-13 12:00 |
12:57:57.71 |
-52:44:33.5 |
HIP 63272 |
7.65 |
| 2026-04-14 00:00 |
12:57:53.48 |
-52:44:21.4 |
HIP 63272 |
7.48 |
| 2026-04-14 12:00 |
12:57:49.26 |
-52:44:09.0 |
HIP 63272 |
7.36 |
| 2026-04-15 00:00 |
12:57:45.04 |
-52:43:56.5 |
HIP 63272 |
7.30 |
| 2026-04-15 12:00 |
12:57:40.83 |
-52:43:43.6 |
HIP 63272 |
7.29 |
| 2026-04-16 00:00 |
12:57:36.63 |
-52:43:30.5 |
HIP 63272 |
7.34 |